1 | /* |
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2 | * IP multicast forwarding procedures |
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3 | * |
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4 | * Written by David Waitzman, BBN Labs, August 1988. |
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5 | * Modified by Steve Deering, Stanford, February 1989. |
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6 | * Modified by Mark J. Steiglitz, Stanford, May, 1991 |
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7 | * Modified by Van Jacobson, LBL, January 1993 |
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8 | * Modified by Ajit Thyagarajan, PARC, August 1993 |
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9 | * Modified by Bill Fenner, PARC, April 1995 |
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10 | * |
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11 | * MROUTING Revision: 3.5 |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | #include "opt_mrouting.h" |
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16 | |
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17 | #include <sys/param.h> |
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18 | #include <sys/queue.h> |
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19 | #include <sys/systm.h> |
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20 | #include <sys/mbuf.h> |
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21 | #include <sys/socket.h> |
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22 | #include <sys/socketvar.h> |
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23 | #include <sys/protosw.h> |
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24 | #include <sys/errno.h> |
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25 | #include <sys/time.h> |
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26 | #include <sys/kernel.h> |
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27 | #include <sys/ioctl.h> |
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28 | #include <sys/syslog.h> |
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29 | #include <net/if.h> |
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30 | #include <net/route.h> |
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31 | #include <netinet/in.h> |
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32 | #include <netinet/in_systm.h> |
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33 | #include <netinet/ip.h> |
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34 | #include <netinet/ip_var.h> |
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35 | #include <netinet/in_pcb.h> |
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36 | #include <netinet/in_var.h> |
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37 | #include <netinet/igmp.h> |
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38 | #include <netinet/igmp_var.h> |
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39 | #include <netinet/ip_mroute.h> |
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40 | #include <netinet/udp.h> |
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41 | |
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42 | #ifndef NTOHL |
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43 | #if BYTE_ORDER != BIG_ENDIAN |
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44 | #define NTOHL(d) ((d) = ntohl((d))) |
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45 | #define NTOHS(d) ((d) = ntohs((u_short)(d))) |
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46 | #define HTONL(d) ((d) = htonl((d))) |
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47 | #define HTONS(d) ((d) = htons((u_short)(d))) |
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48 | #else |
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49 | #define NTOHL(d) |
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50 | #define NTOHS(d) |
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51 | #define HTONL(d) |
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52 | #define HTONS(d) |
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53 | #endif |
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54 | #endif |
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55 | |
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56 | #ifndef MROUTING |
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57 | extern u_long _ip_mcast_src __P((int vifi)); |
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58 | extern int _ip_mforward __P((struct ip *ip, struct ifnet *ifp, |
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59 | struct mbuf *m, struct ip_moptions *imo)); |
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60 | extern int _ip_mrouter_done __P((void)); |
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61 | extern int _ip_mrouter_get __P((int cmd, struct socket *so, |
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62 | struct mbuf **m)); |
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63 | extern int _ip_mrouter_set __P((int cmd, struct socket *so, |
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64 | struct mbuf *m)); |
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65 | extern int _mrt_ioctl __P((int req, caddr_t data, struct proc *p)); |
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66 | |
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67 | /* |
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68 | * Dummy routines and globals used when multicast routing is not compiled in. |
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69 | */ |
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70 | |
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71 | struct socket *ip_mrouter = NULL; |
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72 | /* static u_int ip_mrtproto = 0; */ |
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73 | /* static struct mrtstat mrtstat; */ |
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74 | u_int rsvpdebug = 0; |
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75 | |
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76 | int |
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77 | _ip_mrouter_set(cmd, so, m) |
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78 | int cmd; |
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79 | struct socket *so; |
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80 | struct mbuf *m; |
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81 | { |
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82 | return(EOPNOTSUPP); |
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83 | } |
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84 | |
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85 | int (*ip_mrouter_set)(int, struct socket *, struct mbuf *) = _ip_mrouter_set; |
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86 | |
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87 | |
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88 | int |
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89 | _ip_mrouter_get(cmd, so, m) |
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90 | int cmd; |
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91 | struct socket *so; |
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92 | struct mbuf **m; |
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93 | { |
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94 | return(EOPNOTSUPP); |
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95 | } |
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96 | |
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97 | int (*ip_mrouter_get)(int, struct socket *, struct mbuf **) = _ip_mrouter_get; |
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98 | |
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99 | int |
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100 | _ip_mrouter_done() |
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101 | { |
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102 | return(0); |
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103 | } |
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104 | |
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105 | int (*ip_mrouter_done)(void) = _ip_mrouter_done; |
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106 | |
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107 | int |
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108 | _ip_mforward(ip, ifp, m, imo) |
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109 | struct ip *ip; |
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110 | struct ifnet *ifp; |
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111 | struct mbuf *m; |
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112 | struct ip_moptions *imo; |
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113 | { |
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114 | return(0); |
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115 | } |
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116 | |
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117 | int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, |
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118 | struct ip_moptions *) = _ip_mforward; |
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119 | |
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120 | int |
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121 | _mrt_ioctl(int req, caddr_t data, struct proc *p) |
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122 | { |
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123 | return EOPNOTSUPP; |
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124 | } |
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125 | |
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126 | int (*mrt_ioctl)(int, caddr_t, struct proc *) = _mrt_ioctl; |
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127 | |
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128 | void |
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129 | rsvp_input(m, iphlen) /* XXX must fixup manually */ |
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130 | struct mbuf *m; |
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131 | int iphlen; |
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132 | { |
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133 | /* Can still get packets with rsvp_on = 0 if there is a local member |
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134 | * of the group to which the RSVP packet is addressed. But in this |
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135 | * case we want to throw the packet away. |
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136 | */ |
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137 | if (!rsvp_on) { |
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138 | m_freem(m); |
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139 | return; |
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140 | } |
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141 | |
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142 | if (ip_rsvpd != NULL) { |
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143 | if (rsvpdebug) |
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144 | printf("rsvp_input: Sending packet up old-style socket\n"); |
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145 | rip_input(m, iphlen); |
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146 | return; |
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147 | } |
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148 | /* Drop the packet */ |
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149 | m_freem(m); |
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150 | } |
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151 | |
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152 | void ipip_input(struct mbuf *m, int iphlen) { /* XXX must fixup manually */ |
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153 | rip_input(m, iphlen); |
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154 | } |
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155 | |
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156 | int (*legal_vif_num)(int) = 0; |
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157 | |
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158 | /* |
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159 | * This should never be called, since IP_MULTICAST_VIF should fail, but |
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160 | * just in case it does get called, the code a little lower in ip_output |
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161 | * will assign the packet a local address. |
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162 | */ |
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163 | u_long |
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164 | _ip_mcast_src(int vifi) { return INADDR_ANY; } |
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165 | u_long (*ip_mcast_src)(int) = _ip_mcast_src; |
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166 | |
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167 | int |
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168 | ip_rsvp_vif_init(so, m) |
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169 | struct socket *so; |
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170 | struct mbuf *m; |
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171 | { |
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172 | return(EINVAL); |
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173 | } |
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174 | |
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175 | int |
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176 | ip_rsvp_vif_done(so, m) |
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177 | struct socket *so; |
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178 | struct mbuf *m; |
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179 | { |
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180 | return(EINVAL); |
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181 | } |
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182 | |
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183 | void |
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184 | ip_rsvp_force_done(so) |
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185 | struct socket *so; |
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186 | { |
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187 | return; |
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188 | } |
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189 | |
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190 | #else /* MROUTING */ |
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191 | |
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192 | #define M_HASCL(m) ((m)->m_flags & M_EXT) |
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193 | |
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194 | #define INSIZ sizeof(struct in_addr) |
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195 | #define same(a1, a2) \ |
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196 | (bcmp((caddr_t)(a1), (caddr_t)(a2), INSIZ) == 0) |
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197 | |
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198 | #define MT_MRTABLE MT_RTABLE /* since nothing else uses it */ |
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199 | |
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200 | /* |
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201 | * Globals. All but ip_mrouter and ip_mrtproto could be static, |
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202 | * except for netstat or debugging purposes. |
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203 | */ |
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204 | #ifndef MROUTE_LKM |
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205 | struct socket *ip_mrouter = NULL; |
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206 | struct mrtstat mrtstat; |
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207 | |
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208 | int ip_mrtproto = IGMP_DVMRP; /* for netstat only */ |
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209 | #else /* MROUTE_LKM */ |
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210 | extern void X_ipip_input __P((struct mbuf *m, int iphlen)); |
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211 | extern struct mrtstat mrtstat; |
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212 | static int ip_mrtproto; |
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213 | #endif |
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214 | |
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215 | #define NO_RTE_FOUND 0x1 |
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216 | #define RTE_FOUND 0x2 |
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217 | |
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218 | static struct mbuf *mfctable[MFCTBLSIZ]; |
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219 | static u_char nexpire[MFCTBLSIZ]; |
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220 | static struct vif viftable[MAXVIFS]; |
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221 | static u_int mrtdebug = 0; /* debug level */ |
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222 | #define DEBUG_MFC 0x02 |
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223 | #define DEBUG_FORWARD 0x04 |
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224 | #define DEBUG_EXPIRE 0x08 |
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225 | #define DEBUG_XMIT 0x10 |
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226 | static u_int tbfdebug = 0; /* tbf debug level */ |
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227 | static u_int rsvpdebug = 0; /* rsvp debug level */ |
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228 | |
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229 | #define EXPIRE_TIMEOUT (hz / 4) /* 4x / second */ |
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230 | #define UPCALL_EXPIRE 6 /* number of timeouts */ |
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231 | |
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232 | /* |
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233 | * Define the token bucket filter structures |
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234 | * tbftable -> each vif has one of these for storing info |
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235 | */ |
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236 | |
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237 | static struct tbf tbftable[MAXVIFS]; |
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238 | #define TBF_REPROCESS (hz / 100) /* 100x / second */ |
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239 | |
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240 | /* |
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241 | * 'Interfaces' associated with decapsulator (so we can tell |
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242 | * packets that went through it from ones that get reflected |
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243 | * by a broken gateway). These interfaces are never linked into |
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244 | * the system ifnet list & no routes point to them. I.e., packets |
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245 | * can't be sent this way. They only exist as a placeholder for |
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246 | * multicast source verification. |
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247 | */ |
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248 | static struct ifnet multicast_decap_if[MAXVIFS]; |
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249 | |
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250 | #define ENCAP_TTL 64 |
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251 | #define ENCAP_PROTO IPPROTO_IPIP /* 4 */ |
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252 | |
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253 | /* prototype IP hdr for encapsulated packets */ |
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254 | static struct ip multicast_encap_iphdr = { |
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255 | #if BYTE_ORDER == LITTLE_ENDIAN |
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256 | sizeof(struct ip) >> 2, IPVERSION, |
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257 | #else |
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258 | IPVERSION, sizeof(struct ip) >> 2, |
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259 | #endif |
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260 | 0, /* tos */ |
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261 | sizeof(struct ip), /* total length */ |
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262 | 0, /* id */ |
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263 | 0, /* frag offset */ |
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264 | ENCAP_TTL, ENCAP_PROTO, |
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265 | 0, /* checksum */ |
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266 | }; |
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267 | |
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268 | /* |
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269 | * Private variables. |
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270 | */ |
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271 | static vifi_t numvifs = 0; |
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272 | static int have_encap_tunnel = 0; |
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273 | |
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274 | /* |
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275 | * one-back cache used by ipip_input to locate a tunnel's vif |
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276 | * given a datagram's src ip address. |
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277 | */ |
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278 | static u_long last_encap_src; |
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279 | static struct vif *last_encap_vif; |
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280 | |
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281 | static u_long X_ip_mcast_src __P((int vifi)); |
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282 | static int X_ip_mforward __P((struct ip *ip, struct ifnet *ifp, struct mbuf *m, struct ip_moptions *imo)); |
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283 | static int X_ip_mrouter_done __P((void)); |
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284 | static int X_ip_mrouter_get __P((int cmd, struct socket *so, struct mbuf **m)); |
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285 | static int X_ip_mrouter_set __P((int cmd, struct socket *so, struct mbuf *m)); |
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286 | static int X_legal_vif_num __P((int vif)); |
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287 | static int X_mrt_ioctl __P((int cmd, caddr_t data)); |
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288 | |
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289 | static int get_sg_cnt(struct sioc_sg_req *); |
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290 | static int get_vif_cnt(struct sioc_vif_req *); |
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291 | static int ip_mrouter_init(struct socket *, struct mbuf *); |
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292 | static int add_vif(struct vifctl *); |
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293 | static int del_vif(vifi_t *); |
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294 | static int add_mfc(struct mfcctl *); |
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295 | static int del_mfc(struct mfcctl *); |
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296 | static int socket_send(struct socket *, struct mbuf *, struct sockaddr_in *); |
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297 | static int get_version(struct mbuf *); |
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298 | static int get_assert(struct mbuf *); |
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299 | static int set_assert(int *); |
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300 | static void expire_upcalls(void *); |
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301 | static int ip_mdq(struct mbuf *, struct ifnet *, struct mfc *, |
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302 | vifi_t); |
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303 | static void phyint_send(struct ip *, struct vif *, struct mbuf *); |
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304 | static void encap_send(struct ip *, struct vif *, struct mbuf *); |
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305 | static void tbf_control(struct vif *, struct mbuf *, struct ip *, u_long); |
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306 | static void tbf_queue(struct vif *, struct mbuf *); |
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307 | static void tbf_process_q(struct vif *); |
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308 | static void tbf_reprocess_q(void *); |
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309 | static int tbf_dq_sel(struct vif *, struct ip *); |
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310 | static void tbf_send_packet(struct vif *, struct mbuf *); |
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311 | static void tbf_update_tokens(struct vif *); |
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312 | static int priority(struct vif *, struct ip *); |
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313 | void multiencap_decap(struct mbuf *); |
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314 | |
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315 | /* |
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316 | * whether or not special PIM assert processing is enabled. |
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317 | */ |
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318 | static int pim_assert; |
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319 | /* |
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320 | * Rate limit for assert notification messages, in usec |
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321 | */ |
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322 | #define ASSERT_MSG_TIME 3000000 |
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323 | |
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324 | /* |
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325 | * Hash function for a source, group entry |
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326 | */ |
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327 | #define MFCHASH(a, g) MFCHASHMOD(((a) >> 20) ^ ((a) >> 10) ^ (a) ^ \ |
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328 | ((g) >> 20) ^ ((g) >> 10) ^ (g)) |
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329 | |
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330 | /* |
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331 | * Find a route for a given origin IP address and Multicast group address |
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332 | * Type of service parameter to be added in the future!!! |
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333 | */ |
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334 | |
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335 | #define MFCFIND(o, g, rt) { \ |
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336 | register struct mbuf *_mb_rt = mfctable[MFCHASH(o,g)]; \ |
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337 | register struct mfc *_rt = NULL; \ |
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338 | rt = NULL; \ |
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339 | ++mrtstat.mrts_mfc_lookups; \ |
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340 | while (_mb_rt) { \ |
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341 | _rt = mtod(_mb_rt, struct mfc *); \ |
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342 | if ((_rt->mfc_origin.s_addr == o) && \ |
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343 | (_rt->mfc_mcastgrp.s_addr == g) && \ |
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344 | (_mb_rt->m_act == NULL)) { \ |
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345 | rt = _rt; \ |
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346 | break; \ |
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347 | } \ |
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348 | _mb_rt = _mb_rt->m_next; \ |
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349 | } \ |
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350 | if (rt == NULL) { \ |
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351 | ++mrtstat.mrts_mfc_misses; \ |
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352 | } \ |
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353 | } |
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354 | |
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355 | |
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356 | /* |
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357 | * Macros to compute elapsed time efficiently |
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358 | * Borrowed from Van Jacobson's scheduling code |
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359 | */ |
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360 | #define TV_DELTA(a, b, delta) { \ |
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361 | register int xxs; \ |
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362 | \ |
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363 | delta = (a).tv_usec - (b).tv_usec; \ |
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364 | if ((xxs = (a).tv_sec - (b).tv_sec)) { \ |
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365 | switch (xxs) { \ |
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366 | case 2: \ |
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367 | delta += 1000000; \ |
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368 | /* fall through */ \ |
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369 | case 1: \ |
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370 | delta += 1000000; \ |
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371 | break; \ |
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372 | default: \ |
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373 | delta += (1000000 * xxs); \ |
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374 | } \ |
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375 | } \ |
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376 | } |
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377 | |
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378 | #define TV_LT(a, b) (((a).tv_usec < (b).tv_usec && \ |
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379 | (a).tv_sec <= (b).tv_sec) || (a).tv_sec < (b).tv_sec) |
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380 | |
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381 | #ifdef UPCALL_TIMING |
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382 | u_long upcall_data[51]; |
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383 | static void collate(struct timeval *); |
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384 | #endif /* UPCALL_TIMING */ |
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385 | |
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386 | |
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387 | /* |
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388 | * Handle MRT setsockopt commands to modify the multicast routing tables. |
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389 | */ |
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390 | static int |
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391 | X_ip_mrouter_set(cmd, so, m) |
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392 | int cmd; |
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393 | struct socket *so; |
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394 | struct mbuf *m; |
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395 | { |
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396 | if (cmd != MRT_INIT && so != ip_mrouter) return EACCES; |
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397 | |
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398 | switch (cmd) { |
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399 | case MRT_INIT: return ip_mrouter_init(so, m); |
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400 | case MRT_DONE: return ip_mrouter_done(); |
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401 | case MRT_ADD_VIF: return add_vif (mtod(m, struct vifctl *)); |
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402 | case MRT_DEL_VIF: return del_vif (mtod(m, vifi_t *)); |
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403 | case MRT_ADD_MFC: return add_mfc (mtod(m, struct mfcctl *)); |
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404 | case MRT_DEL_MFC: return del_mfc (mtod(m, struct mfcctl *)); |
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405 | case MRT_ASSERT: return set_assert(mtod(m, int *)); |
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406 | default: return EOPNOTSUPP; |
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407 | } |
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408 | } |
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409 | |
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410 | #ifndef MROUTE_LKM |
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411 | int (*ip_mrouter_set)(int, struct socket *, struct mbuf *) = X_ip_mrouter_set; |
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412 | #endif |
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413 | |
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414 | /* |
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415 | * Handle MRT getsockopt commands |
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416 | */ |
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417 | static int |
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418 | X_ip_mrouter_get(cmd, so, m) |
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419 | int cmd; |
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420 | struct socket *so; |
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421 | struct mbuf **m; |
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422 | { |
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423 | struct mbuf *mb; |
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424 | |
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425 | if (so != ip_mrouter) return EACCES; |
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426 | |
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427 | *m = mb = m_get(M_WAIT, MT_SOOPTS); |
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428 | |
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429 | switch (cmd) { |
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430 | case MRT_VERSION: return get_version(mb); |
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431 | case MRT_ASSERT: return get_assert(mb); |
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432 | default: return EOPNOTSUPP; |
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433 | } |
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434 | } |
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435 | |
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436 | #ifndef MROUTE_LKM |
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437 | int (*ip_mrouter_get)(int, struct socket *, struct mbuf **) = X_ip_mrouter_get; |
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438 | #endif |
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439 | |
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440 | /* |
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441 | * Handle ioctl commands to obtain information from the cache |
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442 | */ |
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443 | static int |
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444 | X_mrt_ioctl(cmd, data) |
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445 | int cmd; |
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446 | caddr_t data; |
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447 | { |
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448 | int error = 0; |
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449 | |
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450 | switch (cmd) { |
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451 | case (SIOCGETVIFCNT): |
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452 | return (get_vif_cnt((struct sioc_vif_req *)data)); |
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453 | break; |
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454 | case (SIOCGETSGCNT): |
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455 | return (get_sg_cnt((struct sioc_sg_req *)data)); |
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456 | break; |
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457 | default: |
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458 | return (EINVAL); |
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459 | break; |
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460 | } |
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461 | return error; |
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462 | } |
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463 | |
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464 | #ifndef MROUTE_LKM |
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465 | int (*mrt_ioctl)(int, caddr_t) = X_mrt_ioctl; |
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466 | #endif |
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467 | |
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468 | /* |
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469 | * returns the packet, byte, rpf-failure count for the source group provided |
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470 | */ |
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471 | static int |
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472 | get_sg_cnt(req) |
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473 | register struct sioc_sg_req *req; |
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474 | { |
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475 | register struct mfc *rt; |
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476 | int s; |
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477 | |
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478 | s = splnet(); |
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479 | MFCFIND(req->src.s_addr, req->grp.s_addr, rt); |
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480 | splx(s); |
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481 | if (rt != NULL) { |
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482 | req->pktcnt = rt->mfc_pkt_cnt; |
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483 | req->bytecnt = rt->mfc_byte_cnt; |
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484 | req->wrong_if = rt->mfc_wrong_if; |
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485 | } else |
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486 | req->pktcnt = req->bytecnt = req->wrong_if = 0xffffffff; |
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487 | |
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488 | return 0; |
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489 | } |
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490 | |
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491 | /* |
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492 | * returns the input and output packet and byte counts on the vif provided |
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493 | */ |
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494 | static int |
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495 | get_vif_cnt(req) |
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496 | register struct sioc_vif_req *req; |
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497 | { |
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498 | register vifi_t vifi = req->vifi; |
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499 | |
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500 | if (vifi >= numvifs) return EINVAL; |
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501 | |
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502 | req->icount = viftable[vifi].v_pkt_in; |
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503 | req->ocount = viftable[vifi].v_pkt_out; |
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504 | req->ibytes = viftable[vifi].v_bytes_in; |
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505 | req->obytes = viftable[vifi].v_bytes_out; |
---|
506 | |
---|
507 | return 0; |
---|
508 | } |
---|
509 | |
---|
510 | /* |
---|
511 | * Enable multicast routing |
---|
512 | */ |
---|
513 | static int |
---|
514 | ip_mrouter_init(so, m) |
---|
515 | struct socket *so; |
---|
516 | struct mbuf *m; |
---|
517 | { |
---|
518 | int *v; |
---|
519 | |
---|
520 | if (mrtdebug) |
---|
521 | log(LOG_DEBUG,"ip_mrouter_init: so_type = %d, pr_protocol = %d\n", |
---|
522 | so->so_type, so->so_proto->pr_protocol); |
---|
523 | |
---|
524 | if (so->so_type != SOCK_RAW || |
---|
525 | so->so_proto->pr_protocol != IPPROTO_IGMP) return EOPNOTSUPP; |
---|
526 | |
---|
527 | if (!m || (m->m_len != sizeof(int *))) |
---|
528 | return ENOPROTOOPT; |
---|
529 | |
---|
530 | v = mtod(m, int *); |
---|
531 | if (*v != 1) |
---|
532 | return ENOPROTOOPT; |
---|
533 | |
---|
534 | if (ip_mrouter != NULL) return EADDRINUSE; |
---|
535 | |
---|
536 | ip_mrouter = so; |
---|
537 | |
---|
538 | bzero((caddr_t)mfctable, sizeof(mfctable)); |
---|
539 | bzero((caddr_t)nexpire, sizeof(nexpire)); |
---|
540 | |
---|
541 | pim_assert = 0; |
---|
542 | |
---|
543 | timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT); |
---|
544 | |
---|
545 | if (mrtdebug) |
---|
546 | log(LOG_DEBUG, "ip_mrouter_init\n"); |
---|
547 | |
---|
548 | return 0; |
---|
549 | } |
---|
550 | |
---|
551 | /* |
---|
552 | * Disable multicast routing |
---|
553 | */ |
---|
554 | static int |
---|
555 | X_ip_mrouter_done() |
---|
556 | { |
---|
557 | vifi_t vifi; |
---|
558 | int i; |
---|
559 | struct ifnet *ifp; |
---|
560 | struct ifreq ifr; |
---|
561 | struct mbuf *mb_rt; |
---|
562 | struct mbuf *m; |
---|
563 | struct rtdetq *rte; |
---|
564 | int s; |
---|
565 | |
---|
566 | s = splnet(); |
---|
567 | |
---|
568 | /* |
---|
569 | * For each phyint in use, disable promiscuous reception of all IP |
---|
570 | * multicasts. |
---|
571 | */ |
---|
572 | for (vifi = 0; vifi < numvifs; vifi++) { |
---|
573 | if (viftable[vifi].v_lcl_addr.s_addr != 0 && |
---|
574 | !(viftable[vifi].v_flags & VIFF_TUNNEL)) { |
---|
575 | ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_family = AF_INET; |
---|
576 | ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr.s_addr |
---|
577 | = INADDR_ANY; |
---|
578 | ifp = viftable[vifi].v_ifp; |
---|
579 | (*ifp->if_ioctl)(ifp, SIOCDELMULTI, (caddr_t)&ifr); |
---|
580 | } |
---|
581 | } |
---|
582 | bzero((caddr_t)tbftable, sizeof(tbftable)); |
---|
583 | bzero((caddr_t)viftable, sizeof(viftable)); |
---|
584 | numvifs = 0; |
---|
585 | pim_assert = 0; |
---|
586 | |
---|
587 | untimeout(expire_upcalls, (caddr_t)NULL); |
---|
588 | |
---|
589 | /* |
---|
590 | * Free all multicast forwarding cache entries. |
---|
591 | */ |
---|
592 | for (i = 0; i < MFCTBLSIZ; i++) { |
---|
593 | mb_rt = mfctable[i]; |
---|
594 | while (mb_rt) { |
---|
595 | if (mb_rt->m_act != NULL) { |
---|
596 | while (mb_rt->m_act) { |
---|
597 | m = mb_rt->m_act; |
---|
598 | mb_rt->m_act = m->m_act; |
---|
599 | rte = mtod(m, struct rtdetq *); |
---|
600 | m_freem(rte->m); |
---|
601 | m_free(m); |
---|
602 | } |
---|
603 | } |
---|
604 | mb_rt = m_free(mb_rt); |
---|
605 | } |
---|
606 | } |
---|
607 | |
---|
608 | bzero((caddr_t)mfctable, sizeof(mfctable)); |
---|
609 | |
---|
610 | /* |
---|
611 | * Reset de-encapsulation cache |
---|
612 | */ |
---|
613 | last_encap_src = 0; |
---|
614 | last_encap_vif = NULL; |
---|
615 | have_encap_tunnel = 0; |
---|
616 | |
---|
617 | ip_mrouter = NULL; |
---|
618 | |
---|
619 | splx(s); |
---|
620 | |
---|
621 | if (mrtdebug) |
---|
622 | log(LOG_DEBUG, "ip_mrouter_done\n"); |
---|
623 | |
---|
624 | return 0; |
---|
625 | } |
---|
626 | |
---|
627 | #ifndef MROUTE_LKM |
---|
628 | int (*ip_mrouter_done)(void) = X_ip_mrouter_done; |
---|
629 | #endif |
---|
630 | |
---|
631 | static int |
---|
632 | get_version(mb) |
---|
633 | struct mbuf *mb; |
---|
634 | { |
---|
635 | int *v; |
---|
636 | |
---|
637 | v = mtod(mb, int *); |
---|
638 | |
---|
639 | *v = 0x0305; /* XXX !!!! */ |
---|
640 | mb->m_len = sizeof(int); |
---|
641 | |
---|
642 | return 0; |
---|
643 | } |
---|
644 | |
---|
645 | /* |
---|
646 | * Set PIM assert processing global |
---|
647 | */ |
---|
648 | static int |
---|
649 | set_assert(i) |
---|
650 | int *i; |
---|
651 | { |
---|
652 | if ((*i != 1) && (*i != 0)) |
---|
653 | return EINVAL; |
---|
654 | |
---|
655 | pim_assert = *i; |
---|
656 | |
---|
657 | return 0; |
---|
658 | } |
---|
659 | |
---|
660 | /* |
---|
661 | * Get PIM assert processing global |
---|
662 | */ |
---|
663 | static int |
---|
664 | get_assert(m) |
---|
665 | struct mbuf *m; |
---|
666 | { |
---|
667 | int *i; |
---|
668 | |
---|
669 | i = mtod(m, int *); |
---|
670 | |
---|
671 | *i = pim_assert; |
---|
672 | |
---|
673 | return 0; |
---|
674 | } |
---|
675 | |
---|
676 | /* |
---|
677 | * Add a vif to the vif table |
---|
678 | */ |
---|
679 | static int |
---|
680 | add_vif(vifcp) |
---|
681 | register struct vifctl *vifcp; |
---|
682 | { |
---|
683 | register struct vif *vifp = viftable + vifcp->vifc_vifi; |
---|
684 | static struct sockaddr_in sin = {sizeof sin, AF_INET}; |
---|
685 | struct ifaddr *ifa; |
---|
686 | struct ifnet *ifp; |
---|
687 | struct ifreq ifr; |
---|
688 | int error, s; |
---|
689 | struct tbf *v_tbf = tbftable + vifcp->vifc_vifi; |
---|
690 | |
---|
691 | if (vifcp->vifc_vifi >= MAXVIFS) return EINVAL; |
---|
692 | if (vifp->v_lcl_addr.s_addr != 0) return EADDRINUSE; |
---|
693 | |
---|
694 | /* Find the interface with an address in AF_INET family */ |
---|
695 | sin.sin_addr = vifcp->vifc_lcl_addr; |
---|
696 | ifa = ifa_ifwithaddr((struct sockaddr *)&sin); |
---|
697 | if (ifa == 0) return EADDRNOTAVAIL; |
---|
698 | ifp = ifa->ifa_ifp; |
---|
699 | |
---|
700 | if (vifcp->vifc_flags & VIFF_TUNNEL) { |
---|
701 | if ((vifcp->vifc_flags & VIFF_SRCRT) == 0) { |
---|
702 | /* |
---|
703 | * An encapsulating tunnel is wanted. Tell ipip_input() to |
---|
704 | * start paying attention to encapsulated packets. |
---|
705 | */ |
---|
706 | if (have_encap_tunnel == 0) { |
---|
707 | have_encap_tunnel = 1; |
---|
708 | for (s = 0; s < MAXVIFS; ++s) { |
---|
709 | multicast_decap_if[s].if_name = "mdecap"; |
---|
710 | multicast_decap_if[s].if_unit = s; |
---|
711 | } |
---|
712 | } |
---|
713 | /* |
---|
714 | * Set interface to fake encapsulator interface |
---|
715 | */ |
---|
716 | ifp = &multicast_decap_if[vifcp->vifc_vifi]; |
---|
717 | /* |
---|
718 | * Prepare cached route entry |
---|
719 | */ |
---|
720 | bzero(&vifp->v_route, sizeof(vifp->v_route)); |
---|
721 | } else { |
---|
722 | log(LOG_ERR, "source routed tunnels not supported\n"); |
---|
723 | return EOPNOTSUPP; |
---|
724 | } |
---|
725 | } else { |
---|
726 | /* Make sure the interface supports multicast */ |
---|
727 | if ((ifp->if_flags & IFF_MULTICAST) == 0) |
---|
728 | return EOPNOTSUPP; |
---|
729 | |
---|
730 | /* Enable promiscuous reception of all IP multicasts from the if */ |
---|
731 | ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_family = AF_INET; |
---|
732 | ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr.s_addr = INADDR_ANY; |
---|
733 | s = splnet(); |
---|
734 | error = (*ifp->if_ioctl)(ifp, SIOCADDMULTI, (caddr_t)&ifr); |
---|
735 | splx(s); |
---|
736 | if (error) |
---|
737 | return error; |
---|
738 | } |
---|
739 | |
---|
740 | s = splnet(); |
---|
741 | /* define parameters for the tbf structure */ |
---|
742 | vifp->v_tbf = v_tbf; |
---|
743 | GET_TIME(vifp->v_tbf->tbf_last_pkt_t); |
---|
744 | vifp->v_tbf->tbf_n_tok = 0; |
---|
745 | vifp->v_tbf->tbf_q_len = 0; |
---|
746 | vifp->v_tbf->tbf_max_q_len = MAXQSIZE; |
---|
747 | vifp->v_tbf->tbf_q = vifp->v_tbf->tbf_t = NULL; |
---|
748 | |
---|
749 | vifp->v_flags = vifcp->vifc_flags; |
---|
750 | vifp->v_threshold = vifcp->vifc_threshold; |
---|
751 | vifp->v_lcl_addr = vifcp->vifc_lcl_addr; |
---|
752 | vifp->v_rmt_addr = vifcp->vifc_rmt_addr; |
---|
753 | vifp->v_ifp = ifp; |
---|
754 | /* scaling up here allows division by 1024 in critical code */ |
---|
755 | vifp->v_rate_limit= vifcp->vifc_rate_limit * 1024 / 1000; |
---|
756 | vifp->v_rsvp_on = 0; |
---|
757 | vifp->v_rsvpd = NULL; |
---|
758 | /* initialize per vif pkt counters */ |
---|
759 | vifp->v_pkt_in = 0; |
---|
760 | vifp->v_pkt_out = 0; |
---|
761 | vifp->v_bytes_in = 0; |
---|
762 | vifp->v_bytes_out = 0; |
---|
763 | splx(s); |
---|
764 | |
---|
765 | /* Adjust numvifs up if the vifi is higher than numvifs */ |
---|
766 | if (numvifs <= vifcp->vifc_vifi) numvifs = vifcp->vifc_vifi + 1; |
---|
767 | |
---|
768 | if (mrtdebug) |
---|
769 | log(LOG_DEBUG, "add_vif #%d, lcladdr %x, %s %x, thresh %x, rate %d\n", |
---|
770 | vifcp->vifc_vifi, |
---|
771 | ntohl(vifcp->vifc_lcl_addr.s_addr), |
---|
772 | (vifcp->vifc_flags & VIFF_TUNNEL) ? "rmtaddr" : "mask", |
---|
773 | ntohl(vifcp->vifc_rmt_addr.s_addr), |
---|
774 | vifcp->vifc_threshold, |
---|
775 | vifcp->vifc_rate_limit); |
---|
776 | |
---|
777 | return 0; |
---|
778 | } |
---|
779 | |
---|
780 | /* |
---|
781 | * Delete a vif from the vif table |
---|
782 | */ |
---|
783 | static int |
---|
784 | del_vif(vifip) |
---|
785 | vifi_t *vifip; |
---|
786 | { |
---|
787 | register struct vif *vifp = viftable + *vifip; |
---|
788 | register vifi_t vifi; |
---|
789 | register struct mbuf *m; |
---|
790 | struct ifnet *ifp; |
---|
791 | struct ifreq ifr; |
---|
792 | int s; |
---|
793 | |
---|
794 | if (*vifip >= numvifs) return EINVAL; |
---|
795 | if (vifp->v_lcl_addr.s_addr == 0) return EADDRNOTAVAIL; |
---|
796 | |
---|
797 | s = splnet(); |
---|
798 | |
---|
799 | if (!(vifp->v_flags & VIFF_TUNNEL)) { |
---|
800 | ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_family = AF_INET; |
---|
801 | ((struct sockaddr_in *)&(ifr.ifr_addr))->sin_addr.s_addr = INADDR_ANY; |
---|
802 | ifp = vifp->v_ifp; |
---|
803 | (*ifp->if_ioctl)(ifp, SIOCDELMULTI, (caddr_t)&ifr); |
---|
804 | } |
---|
805 | |
---|
806 | if (vifp == last_encap_vif) { |
---|
807 | last_encap_vif = 0; |
---|
808 | last_encap_src = 0; |
---|
809 | } |
---|
810 | |
---|
811 | /* |
---|
812 | * Free packets queued at the interface |
---|
813 | */ |
---|
814 | while (vifp->v_tbf->tbf_q) { |
---|
815 | m = vifp->v_tbf->tbf_q; |
---|
816 | vifp->v_tbf->tbf_q = m->m_act; |
---|
817 | m_freem(m); |
---|
818 | } |
---|
819 | |
---|
820 | bzero((caddr_t)vifp->v_tbf, sizeof(*(vifp->v_tbf))); |
---|
821 | bzero((caddr_t)vifp, sizeof (*vifp)); |
---|
822 | |
---|
823 | /* Adjust numvifs down */ |
---|
824 | for (vifi = numvifs; vifi > 0; vifi--) |
---|
825 | if (viftable[vifi-1].v_lcl_addr.s_addr != 0) break; |
---|
826 | numvifs = vifi; |
---|
827 | |
---|
828 | splx(s); |
---|
829 | |
---|
830 | if (mrtdebug) |
---|
831 | log(LOG_DEBUG, "del_vif %d, numvifs %d\n", *vifip, numvifs); |
---|
832 | |
---|
833 | return 0; |
---|
834 | } |
---|
835 | |
---|
836 | /* |
---|
837 | * Add an mfc entry |
---|
838 | */ |
---|
839 | static int |
---|
840 | add_mfc(mfccp) |
---|
841 | struct mfcctl *mfccp; |
---|
842 | { |
---|
843 | struct mfc *rt; |
---|
844 | register struct mbuf *mb_rt; |
---|
845 | u_long hash; |
---|
846 | struct mbuf *mb_ntry; |
---|
847 | struct rtdetq *rte; |
---|
848 | register u_short nstl; |
---|
849 | int s; |
---|
850 | int i; |
---|
851 | |
---|
852 | MFCFIND(mfccp->mfcc_origin.s_addr, mfccp->mfcc_mcastgrp.s_addr, rt); |
---|
853 | |
---|
854 | /* If an entry already exists, just update the fields */ |
---|
855 | if (rt) { |
---|
856 | if (mrtdebug & DEBUG_MFC) |
---|
857 | log(LOG_DEBUG,"add_mfc update o %x g %x p %x\n", |
---|
858 | ntohl(mfccp->mfcc_origin.s_addr), |
---|
859 | ntohl(mfccp->mfcc_mcastgrp.s_addr), |
---|
860 | mfccp->mfcc_parent); |
---|
861 | |
---|
862 | s = splnet(); |
---|
863 | rt->mfc_parent = mfccp->mfcc_parent; |
---|
864 | for (i = 0; i < numvifs; i++) |
---|
865 | rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; |
---|
866 | splx(s); |
---|
867 | return 0; |
---|
868 | } |
---|
869 | |
---|
870 | /* |
---|
871 | * Find the entry for which the upcall was made and update |
---|
872 | */ |
---|
873 | s = splnet(); |
---|
874 | hash = MFCHASH(mfccp->mfcc_origin.s_addr, mfccp->mfcc_mcastgrp.s_addr); |
---|
875 | for (mb_rt = mfctable[hash], nstl = 0; mb_rt; mb_rt = mb_rt->m_next) { |
---|
876 | |
---|
877 | rt = mtod(mb_rt, struct mfc *); |
---|
878 | if ((rt->mfc_origin.s_addr == mfccp->mfcc_origin.s_addr) && |
---|
879 | (rt->mfc_mcastgrp.s_addr == mfccp->mfcc_mcastgrp.s_addr) && |
---|
880 | (mb_rt->m_act != NULL)) { |
---|
881 | |
---|
882 | if (nstl++) |
---|
883 | log(LOG_ERR, "add_mfc %s o %x g %x p %x dbx %x\n", |
---|
884 | "multiple kernel entries", |
---|
885 | ntohl(mfccp->mfcc_origin.s_addr), |
---|
886 | ntohl(mfccp->mfcc_mcastgrp.s_addr), |
---|
887 | mfccp->mfcc_parent, mb_rt->m_act); |
---|
888 | |
---|
889 | if (mrtdebug & DEBUG_MFC) |
---|
890 | log(LOG_DEBUG,"add_mfc o %x g %x p %x dbg %x\n", |
---|
891 | ntohl(mfccp->mfcc_origin.s_addr), |
---|
892 | ntohl(mfccp->mfcc_mcastgrp.s_addr), |
---|
893 | mfccp->mfcc_parent, mb_rt->m_act); |
---|
894 | |
---|
895 | rt->mfc_origin = mfccp->mfcc_origin; |
---|
896 | rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; |
---|
897 | rt->mfc_parent = mfccp->mfcc_parent; |
---|
898 | for (i = 0; i < numvifs; i++) |
---|
899 | rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; |
---|
900 | /* initialize pkt counters per src-grp */ |
---|
901 | rt->mfc_pkt_cnt = 0; |
---|
902 | rt->mfc_byte_cnt = 0; |
---|
903 | rt->mfc_wrong_if = 0; |
---|
904 | rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; |
---|
905 | |
---|
906 | rt->mfc_expire = 0; /* Don't clean this guy up */ |
---|
907 | nexpire[hash]--; |
---|
908 | |
---|
909 | /* free packets Qed at the end of this entry */ |
---|
910 | while (mb_rt->m_act) { |
---|
911 | mb_ntry = mb_rt->m_act; |
---|
912 | rte = mtod(mb_ntry, struct rtdetq *); |
---|
913 | /* #ifdef RSVP_ISI */ |
---|
914 | ip_mdq(rte->m, rte->ifp, rt, -1); |
---|
915 | /* #endif */ |
---|
916 | mb_rt->m_act = mb_ntry->m_act; |
---|
917 | m_freem(rte->m); |
---|
918 | #ifdef UPCALL_TIMING |
---|
919 | collate(&(rte->t)); |
---|
920 | #endif /* UPCALL_TIMING */ |
---|
921 | m_free(mb_ntry); |
---|
922 | } |
---|
923 | } |
---|
924 | } |
---|
925 | |
---|
926 | /* |
---|
927 | * It is possible that an entry is being inserted without an upcall |
---|
928 | */ |
---|
929 | if (nstl == 0) { |
---|
930 | if (mrtdebug & DEBUG_MFC) |
---|
931 | log(LOG_DEBUG,"add_mfc no upcall h %d o %x g %x p %x\n", |
---|
932 | hash, ntohl(mfccp->mfcc_origin.s_addr), |
---|
933 | ntohl(mfccp->mfcc_mcastgrp.s_addr), |
---|
934 | mfccp->mfcc_parent); |
---|
935 | |
---|
936 | for (mb_rt = mfctable[hash]; mb_rt; mb_rt = mb_rt->m_next) { |
---|
937 | |
---|
938 | rt = mtod(mb_rt, struct mfc *); |
---|
939 | if ((rt->mfc_origin.s_addr == mfccp->mfcc_origin.s_addr) && |
---|
940 | (rt->mfc_mcastgrp.s_addr == mfccp->mfcc_mcastgrp.s_addr)) { |
---|
941 | |
---|
942 | rt->mfc_origin = mfccp->mfcc_origin; |
---|
943 | rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; |
---|
944 | rt->mfc_parent = mfccp->mfcc_parent; |
---|
945 | for (i = 0; i < numvifs; i++) |
---|
946 | rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; |
---|
947 | /* initialize pkt counters per src-grp */ |
---|
948 | rt->mfc_pkt_cnt = 0; |
---|
949 | rt->mfc_byte_cnt = 0; |
---|
950 | rt->mfc_wrong_if = 0; |
---|
951 | rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; |
---|
952 | if (rt->mfc_expire) |
---|
953 | nexpire[hash]--; |
---|
954 | rt->mfc_expire = 0; |
---|
955 | } |
---|
956 | } |
---|
957 | if (mb_rt == NULL) { |
---|
958 | /* no upcall, so make a new entry */ |
---|
959 | MGET(mb_rt, M_DONTWAIT, MT_MRTABLE); |
---|
960 | if (mb_rt == NULL) { |
---|
961 | splx(s); |
---|
962 | return ENOBUFS; |
---|
963 | } |
---|
964 | |
---|
965 | rt = mtod(mb_rt, struct mfc *); |
---|
966 | |
---|
967 | /* insert new entry at head of hash chain */ |
---|
968 | rt->mfc_origin = mfccp->mfcc_origin; |
---|
969 | rt->mfc_mcastgrp = mfccp->mfcc_mcastgrp; |
---|
970 | rt->mfc_parent = mfccp->mfcc_parent; |
---|
971 | for (i = 0; i < numvifs; i++) |
---|
972 | rt->mfc_ttls[i] = mfccp->mfcc_ttls[i]; |
---|
973 | /* initialize pkt counters per src-grp */ |
---|
974 | rt->mfc_pkt_cnt = 0; |
---|
975 | rt->mfc_byte_cnt = 0; |
---|
976 | rt->mfc_wrong_if = 0; |
---|
977 | rt->mfc_last_assert.tv_sec = rt->mfc_last_assert.tv_usec = 0; |
---|
978 | rt->mfc_expire = 0; |
---|
979 | |
---|
980 | /* link into table */ |
---|
981 | mb_rt->m_next = mfctable[hash]; |
---|
982 | mfctable[hash] = mb_rt; |
---|
983 | mb_rt->m_act = NULL; |
---|
984 | } |
---|
985 | } |
---|
986 | splx(s); |
---|
987 | return 0; |
---|
988 | } |
---|
989 | |
---|
990 | #ifdef UPCALL_TIMING |
---|
991 | /* |
---|
992 | * collect delay statistics on the upcalls |
---|
993 | */ |
---|
994 | static void collate(t) |
---|
995 | register struct timeval *t; |
---|
996 | { |
---|
997 | register u_long d; |
---|
998 | register struct timeval tp; |
---|
999 | register u_long delta; |
---|
1000 | |
---|
1001 | GET_TIME(tp); |
---|
1002 | |
---|
1003 | if (TV_LT(*t, tp)) |
---|
1004 | { |
---|
1005 | TV_DELTA(tp, *t, delta); |
---|
1006 | |
---|
1007 | d = delta >> 10; |
---|
1008 | if (d > 50) |
---|
1009 | d = 50; |
---|
1010 | |
---|
1011 | ++upcall_data[d]; |
---|
1012 | } |
---|
1013 | } |
---|
1014 | #endif /* UPCALL_TIMING */ |
---|
1015 | |
---|
1016 | /* |
---|
1017 | * Delete an mfc entry |
---|
1018 | */ |
---|
1019 | static int |
---|
1020 | del_mfc(mfccp) |
---|
1021 | struct mfcctl *mfccp; |
---|
1022 | { |
---|
1023 | struct in_addr origin; |
---|
1024 | struct in_addr mcastgrp; |
---|
1025 | struct mfc *rt; |
---|
1026 | struct mbuf *mb_rt; |
---|
1027 | struct mbuf **nptr; |
---|
1028 | u_long hash; |
---|
1029 | int s; |
---|
1030 | |
---|
1031 | origin = mfccp->mfcc_origin; |
---|
1032 | mcastgrp = mfccp->mfcc_mcastgrp; |
---|
1033 | hash = MFCHASH(origin.s_addr, mcastgrp.s_addr); |
---|
1034 | |
---|
1035 | if (mrtdebug & DEBUG_MFC) |
---|
1036 | log(LOG_DEBUG,"del_mfc orig %x mcastgrp %x\n", |
---|
1037 | ntohl(origin.s_addr), ntohl(mcastgrp.s_addr)); |
---|
1038 | |
---|
1039 | s = splnet(); |
---|
1040 | |
---|
1041 | nptr = &mfctable[hash]; |
---|
1042 | while ((mb_rt = *nptr) != NULL) { |
---|
1043 | rt = mtod(mb_rt, struct mfc *); |
---|
1044 | if (origin.s_addr == rt->mfc_origin.s_addr && |
---|
1045 | mcastgrp.s_addr == rt->mfc_mcastgrp.s_addr && |
---|
1046 | mb_rt->m_act == NULL) |
---|
1047 | break; |
---|
1048 | |
---|
1049 | nptr = &mb_rt->m_next; |
---|
1050 | } |
---|
1051 | if (mb_rt == NULL) { |
---|
1052 | splx(s); |
---|
1053 | return EADDRNOTAVAIL; |
---|
1054 | } |
---|
1055 | |
---|
1056 | MFREE(mb_rt, *nptr); |
---|
1057 | |
---|
1058 | splx(s); |
---|
1059 | |
---|
1060 | return 0; |
---|
1061 | } |
---|
1062 | |
---|
1063 | /* |
---|
1064 | * Send a message to mrouted on the multicast routing socket |
---|
1065 | */ |
---|
1066 | static int |
---|
1067 | socket_send(s, mm, src) |
---|
1068 | struct socket *s; |
---|
1069 | struct mbuf *mm; |
---|
1070 | struct sockaddr_in *src; |
---|
1071 | { |
---|
1072 | if (s) { |
---|
1073 | if (sbappendaddr(&s->so_rcv, |
---|
1074 | (struct sockaddr *)src, |
---|
1075 | mm, (struct mbuf *)0) != 0) { |
---|
1076 | sorwakeup(s); |
---|
1077 | return 0; |
---|
1078 | } |
---|
1079 | } |
---|
1080 | m_freem(mm); |
---|
1081 | return -1; |
---|
1082 | } |
---|
1083 | |
---|
1084 | /* |
---|
1085 | * IP multicast forwarding function. This function assumes that the packet |
---|
1086 | * pointed to by "ip" has arrived on (or is about to be sent to) the interface |
---|
1087 | * pointed to by "ifp", and the packet is to be relayed to other networks |
---|
1088 | * that have members of the packet's destination IP multicast group. |
---|
1089 | * |
---|
1090 | * The packet is returned unscathed to the caller, unless it is |
---|
1091 | * erroneous, in which case a non-zero return value tells the caller to |
---|
1092 | * discard it. |
---|
1093 | */ |
---|
1094 | |
---|
1095 | #define IP_HDR_LEN 20 /* # bytes of fixed IP header (excluding options) */ |
---|
1096 | #define TUNNEL_LEN 12 /* # bytes of IP option for tunnel encapsulation */ |
---|
1097 | |
---|
1098 | static int |
---|
1099 | X_ip_mforward(ip, ifp, m, imo) |
---|
1100 | register struct ip *ip; |
---|
1101 | struct ifnet *ifp; |
---|
1102 | struct mbuf *m; |
---|
1103 | struct ip_moptions *imo; |
---|
1104 | { |
---|
1105 | register struct mfc *rt; |
---|
1106 | register u_char *ipoptions; |
---|
1107 | static struct sockaddr_in k_igmpsrc = { sizeof k_igmpsrc, AF_INET }; |
---|
1108 | static int srctun = 0; |
---|
1109 | register struct mbuf *mm; |
---|
1110 | int s; |
---|
1111 | vifi_t vifi; |
---|
1112 | struct vif *vifp; |
---|
1113 | |
---|
1114 | if (mrtdebug & DEBUG_FORWARD) |
---|
1115 | log(LOG_DEBUG, "ip_mforward: src %x, dst %x, ifp %x\n", |
---|
1116 | ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr), ifp); |
---|
1117 | |
---|
1118 | if (ip->ip_hl < (IP_HDR_LEN + TUNNEL_LEN) >> 2 || |
---|
1119 | (ipoptions = (u_char *)(ip + 1))[1] != IPOPT_LSRR ) { |
---|
1120 | /* |
---|
1121 | * Packet arrived via a physical interface or |
---|
1122 | * an encapsulated tunnel. |
---|
1123 | */ |
---|
1124 | } else { |
---|
1125 | /* |
---|
1126 | * Packet arrived through a source-route tunnel. |
---|
1127 | * Source-route tunnels are no longer supported. |
---|
1128 | */ |
---|
1129 | if ((srctun++ % 1000) == 0) |
---|
1130 | log(LOG_ERR, "ip_mforward: received source-routed packet from %x\n", |
---|
1131 | ntohl(ip->ip_src.s_addr)); |
---|
1132 | |
---|
1133 | return 1; |
---|
1134 | } |
---|
1135 | |
---|
1136 | if ((imo) && ((vifi = imo->imo_multicast_vif) < numvifs)) { |
---|
1137 | if (ip->ip_ttl < 255) |
---|
1138 | ip->ip_ttl++; /* compensate for -1 in *_send routines */ |
---|
1139 | if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) { |
---|
1140 | vifp = viftable + vifi; |
---|
1141 | printf("Sending IPPROTO_RSVP from %lx to %lx on vif %d (%s%s%d)\n", |
---|
1142 | ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr), vifi, |
---|
1143 | (vifp->v_flags & VIFF_TUNNEL) ? "tunnel on " : "", |
---|
1144 | vifp->v_ifp->if_name, vifp->v_ifp->if_unit); |
---|
1145 | } |
---|
1146 | return (ip_mdq(m, ifp, NULL, vifi)); |
---|
1147 | } |
---|
1148 | if (rsvpdebug && ip->ip_p == IPPROTO_RSVP) { |
---|
1149 | printf("Warning: IPPROTO_RSVP from %lx to %lx without vif option\n", |
---|
1150 | ntohl(ip->ip_src.s_addr), ntohl(ip->ip_dst.s_addr)); |
---|
1151 | if(!imo) |
---|
1152 | printf("In fact, no options were specified at all\n"); |
---|
1153 | } |
---|
1154 | |
---|
1155 | /* |
---|
1156 | * Don't forward a packet with time-to-live of zero or one, |
---|
1157 | * or a packet destined to a local-only group. |
---|
1158 | */ |
---|
1159 | if (ip->ip_ttl <= 1 || |
---|
1160 | ntohl(ip->ip_dst.s_addr) <= INADDR_MAX_LOCAL_GROUP) |
---|
1161 | return 0; |
---|
1162 | |
---|
1163 | /* |
---|
1164 | * Determine forwarding vifs from the forwarding cache table |
---|
1165 | */ |
---|
1166 | s = splnet(); |
---|
1167 | MFCFIND(ip->ip_src.s_addr, ip->ip_dst.s_addr, rt); |
---|
1168 | |
---|
1169 | /* Entry exists, so forward if necessary */ |
---|
1170 | if (rt != NULL) { |
---|
1171 | splx(s); |
---|
1172 | return (ip_mdq(m, ifp, rt, -1)); |
---|
1173 | } else { |
---|
1174 | /* |
---|
1175 | * If we don't have a route for packet's origin, |
---|
1176 | * Make a copy of the packet & |
---|
1177 | * send message to routing daemon |
---|
1178 | */ |
---|
1179 | |
---|
1180 | register struct mbuf *mb_rt; |
---|
1181 | register struct mbuf *mb_ntry; |
---|
1182 | register struct mbuf *mb0; |
---|
1183 | register struct rtdetq *rte; |
---|
1184 | register struct mbuf *rte_m; |
---|
1185 | register u_long hash; |
---|
1186 | register int npkts; |
---|
1187 | int hlen = ip->ip_hl << 2; |
---|
1188 | #ifdef UPCALL_TIMING |
---|
1189 | struct timeval tp; |
---|
1190 | |
---|
1191 | GET_TIME(tp); |
---|
1192 | #endif |
---|
1193 | |
---|
1194 | mrtstat.mrts_no_route++; |
---|
1195 | if (mrtdebug & (DEBUG_FORWARD | DEBUG_MFC)) |
---|
1196 | log(LOG_DEBUG, "ip_mforward: no rte s %x g %x\n", |
---|
1197 | ntohl(ip->ip_src.s_addr), |
---|
1198 | ntohl(ip->ip_dst.s_addr)); |
---|
1199 | |
---|
1200 | /* |
---|
1201 | * Allocate mbufs early so that we don't do extra work if we are |
---|
1202 | * just going to fail anyway. Make sure to pullup the header so |
---|
1203 | * that other people can't step on it. |
---|
1204 | */ |
---|
1205 | MGET(mb_ntry, M_DONTWAIT, MT_DATA); |
---|
1206 | if (mb_ntry == NULL) { |
---|
1207 | splx(s); |
---|
1208 | return ENOBUFS; |
---|
1209 | } |
---|
1210 | mb0 = m_copy(m, 0, M_COPYALL); |
---|
1211 | if (mb0 && (M_HASCL(mb0) || mb0->m_len < hlen)) |
---|
1212 | mb0 = m_pullup(mb0, hlen); |
---|
1213 | if (mb0 == NULL) { |
---|
1214 | m_free(mb_ntry); |
---|
1215 | splx(s); |
---|
1216 | return ENOBUFS; |
---|
1217 | } |
---|
1218 | |
---|
1219 | /* is there an upcall waiting for this packet? */ |
---|
1220 | hash = MFCHASH(ip->ip_src.s_addr, ip->ip_dst.s_addr); |
---|
1221 | for (mb_rt = mfctable[hash]; mb_rt; mb_rt = mb_rt->m_next) { |
---|
1222 | rt = mtod(mb_rt, struct mfc *); |
---|
1223 | if ((ip->ip_src.s_addr == rt->mfc_origin.s_addr) && |
---|
1224 | (ip->ip_dst.s_addr == rt->mfc_mcastgrp.s_addr) && |
---|
1225 | (mb_rt->m_act != NULL)) |
---|
1226 | break; |
---|
1227 | } |
---|
1228 | |
---|
1229 | if (mb_rt == NULL) { |
---|
1230 | int i; |
---|
1231 | struct igmpmsg *im; |
---|
1232 | |
---|
1233 | /* no upcall, so make a new entry */ |
---|
1234 | MGET(mb_rt, M_DONTWAIT, MT_MRTABLE); |
---|
1235 | if (mb_rt == NULL) { |
---|
1236 | m_free(mb_ntry); |
---|
1237 | m_freem(mb0); |
---|
1238 | splx(s); |
---|
1239 | return ENOBUFS; |
---|
1240 | } |
---|
1241 | /* Make a copy of the header to send to the user level process */ |
---|
1242 | mm = m_copy(mb0, 0, hlen); |
---|
1243 | if (mm == NULL) { |
---|
1244 | m_free(mb_ntry); |
---|
1245 | m_freem(mb0); |
---|
1246 | m_free(mb_rt); |
---|
1247 | splx(s); |
---|
1248 | return ENOBUFS; |
---|
1249 | } |
---|
1250 | |
---|
1251 | /* |
---|
1252 | * Send message to routing daemon to install |
---|
1253 | * a route into the kernel table |
---|
1254 | */ |
---|
1255 | k_igmpsrc.sin_addr = ip->ip_src; |
---|
1256 | |
---|
1257 | im = mtod(mm, struct igmpmsg *); |
---|
1258 | im->im_msgtype = IGMPMSG_NOCACHE; |
---|
1259 | im->im_mbz = 0; |
---|
1260 | |
---|
1261 | mrtstat.mrts_upcalls++; |
---|
1262 | |
---|
1263 | if (socket_send(ip_mrouter, mm, &k_igmpsrc) < 0) { |
---|
1264 | log(LOG_WARNING, "ip_mforward: ip_mrouter socket queue full\n"); |
---|
1265 | ++mrtstat.mrts_upq_sockfull; |
---|
1266 | m_free(mb_ntry); |
---|
1267 | m_freem(mb0); |
---|
1268 | m_free(mb_rt); |
---|
1269 | splx(s); |
---|
1270 | return ENOBUFS; |
---|
1271 | } |
---|
1272 | |
---|
1273 | rt = mtod(mb_rt, struct mfc *); |
---|
1274 | |
---|
1275 | /* insert new entry at head of hash chain */ |
---|
1276 | rt->mfc_origin.s_addr = ip->ip_src.s_addr; |
---|
1277 | rt->mfc_mcastgrp.s_addr = ip->ip_dst.s_addr; |
---|
1278 | rt->mfc_expire = UPCALL_EXPIRE; |
---|
1279 | nexpire[hash]++; |
---|
1280 | for (i = 0; i < numvifs; i++) |
---|
1281 | rt->mfc_ttls[i] = 0; |
---|
1282 | rt->mfc_parent = -1; |
---|
1283 | |
---|
1284 | /* link into table */ |
---|
1285 | mb_rt->m_next = mfctable[hash]; |
---|
1286 | mfctable[hash] = mb_rt; |
---|
1287 | mb_rt->m_act = NULL; |
---|
1288 | |
---|
1289 | rte_m = mb_rt; |
---|
1290 | } else { |
---|
1291 | /* determine if q has overflowed */ |
---|
1292 | for (rte_m = mb_rt, npkts = 0; rte_m->m_act; rte_m = rte_m->m_act) |
---|
1293 | npkts++; |
---|
1294 | |
---|
1295 | if (npkts > MAX_UPQ) { |
---|
1296 | mrtstat.mrts_upq_ovflw++; |
---|
1297 | m_free(mb_ntry); |
---|
1298 | m_freem(mb0); |
---|
1299 | splx(s); |
---|
1300 | return 0; |
---|
1301 | } |
---|
1302 | } |
---|
1303 | |
---|
1304 | mb_ntry->m_act = NULL; |
---|
1305 | rte = mtod(mb_ntry, struct rtdetq *); |
---|
1306 | |
---|
1307 | rte->m = mb0; |
---|
1308 | rte->ifp = ifp; |
---|
1309 | #ifdef UPCALL_TIMING |
---|
1310 | rte->t = tp; |
---|
1311 | #endif |
---|
1312 | |
---|
1313 | /* Add this entry to the end of the queue */ |
---|
1314 | rte_m->m_act = mb_ntry; |
---|
1315 | |
---|
1316 | splx(s); |
---|
1317 | |
---|
1318 | return 0; |
---|
1319 | } |
---|
1320 | } |
---|
1321 | |
---|
1322 | #ifndef MROUTE_LKM |
---|
1323 | int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, |
---|
1324 | struct ip_moptions *) = X_ip_mforward; |
---|
1325 | #endif |
---|
1326 | |
---|
1327 | /* |
---|
1328 | * Clean up the cache entry if upcall is not serviced |
---|
1329 | */ |
---|
1330 | static void |
---|
1331 | expire_upcalls(void *unused) |
---|
1332 | { |
---|
1333 | struct mbuf *mb_rt, *m, **nptr; |
---|
1334 | struct rtdetq *rte; |
---|
1335 | struct mfc *mfc; |
---|
1336 | int i; |
---|
1337 | int s; |
---|
1338 | |
---|
1339 | s = splnet(); |
---|
1340 | for (i = 0; i < MFCTBLSIZ; i++) { |
---|
1341 | if (nexpire[i] == 0) |
---|
1342 | continue; |
---|
1343 | nptr = &mfctable[i]; |
---|
1344 | for (mb_rt = *nptr; mb_rt != NULL; mb_rt = *nptr) { |
---|
1345 | mfc = mtod(mb_rt, struct mfc *); |
---|
1346 | |
---|
1347 | /* |
---|
1348 | * Skip real cache entries |
---|
1349 | * Make sure it wasn't marked to not expire (shouldn't happen) |
---|
1350 | * If it expires now |
---|
1351 | */ |
---|
1352 | if (mb_rt->m_act != NULL && |
---|
1353 | mfc->mfc_expire != 0 && |
---|
1354 | --mfc->mfc_expire == 0) { |
---|
1355 | if (mrtdebug & DEBUG_EXPIRE) |
---|
1356 | log(LOG_DEBUG, "expire_upcalls: expiring (%x %x)\n", |
---|
1357 | ntohl(mfc->mfc_origin.s_addr), |
---|
1358 | ntohl(mfc->mfc_mcastgrp.s_addr)); |
---|
1359 | /* |
---|
1360 | * drop all the packets |
---|
1361 | * free the mbuf with the pkt, if, timing info |
---|
1362 | */ |
---|
1363 | while (mb_rt->m_act) { |
---|
1364 | m = mb_rt->m_act; |
---|
1365 | mb_rt->m_act = m->m_act; |
---|
1366 | |
---|
1367 | rte = mtod(m, struct rtdetq *); |
---|
1368 | m_freem(rte->m); |
---|
1369 | m_free(m); |
---|
1370 | } |
---|
1371 | ++mrtstat.mrts_cache_cleanups; |
---|
1372 | nexpire[i]--; |
---|
1373 | |
---|
1374 | MFREE(mb_rt, *nptr); |
---|
1375 | } else { |
---|
1376 | nptr = &mb_rt->m_next; |
---|
1377 | } |
---|
1378 | } |
---|
1379 | } |
---|
1380 | splx(s); |
---|
1381 | timeout(expire_upcalls, (caddr_t)NULL, EXPIRE_TIMEOUT); |
---|
1382 | } |
---|
1383 | |
---|
1384 | /* |
---|
1385 | * Packet forwarding routine once entry in the cache is made |
---|
1386 | */ |
---|
1387 | static int |
---|
1388 | ip_mdq(m, ifp, rt, xmt_vif) |
---|
1389 | register struct mbuf *m; |
---|
1390 | register struct ifnet *ifp; |
---|
1391 | register struct mfc *rt; |
---|
1392 | register vifi_t xmt_vif; |
---|
1393 | { |
---|
1394 | register struct ip *ip = mtod(m, struct ip *); |
---|
1395 | register vifi_t vifi; |
---|
1396 | register struct vif *vifp; |
---|
1397 | register int plen = ntohs(ip->ip_len); |
---|
1398 | |
---|
1399 | /* |
---|
1400 | * Macro to send packet on vif. Since RSVP packets don't get counted on |
---|
1401 | * input, they shouldn't get counted on output, so statistics keeping is |
---|
1402 | * seperate. |
---|
1403 | */ |
---|
1404 | #define MC_SEND(ip,vifp,m) { \ |
---|
1405 | if ((vifp)->v_flags & VIFF_TUNNEL) \ |
---|
1406 | encap_send((ip), (vifp), (m)); \ |
---|
1407 | else \ |
---|
1408 | phyint_send((ip), (vifp), (m)); \ |
---|
1409 | } |
---|
1410 | |
---|
1411 | /* |
---|
1412 | * If xmt_vif is not -1, send on only the requested vif. |
---|
1413 | * |
---|
1414 | * (since vifi_t is u_short, -1 becomes MAXUSHORT, which > numvifs.) |
---|
1415 | */ |
---|
1416 | if (xmt_vif < numvifs) { |
---|
1417 | MC_SEND(ip, viftable + xmt_vif, m); |
---|
1418 | return 1; |
---|
1419 | } |
---|
1420 | |
---|
1421 | /* |
---|
1422 | * Don't forward if it didn't arrive from the parent vif for its origin. |
---|
1423 | */ |
---|
1424 | vifi = rt->mfc_parent; |
---|
1425 | if ((vifi >= numvifs) || (viftable[vifi].v_ifp != ifp)) { |
---|
1426 | /* came in the wrong interface */ |
---|
1427 | if (mrtdebug & DEBUG_FORWARD) |
---|
1428 | log(LOG_DEBUG, "wrong if: ifp %x vifi %d vififp %x\n", |
---|
1429 | ifp, vifi, viftable[vifi].v_ifp); |
---|
1430 | ++mrtstat.mrts_wrong_if; |
---|
1431 | ++rt->mfc_wrong_if; |
---|
1432 | /* |
---|
1433 | * If we are doing PIM assert processing, and we are forwarding |
---|
1434 | * packets on this interface, and it is a broadcast medium |
---|
1435 | * interface (and not a tunnel), send a message to the routing daemon. |
---|
1436 | */ |
---|
1437 | if (pim_assert && rt->mfc_ttls[vifi] && |
---|
1438 | (ifp->if_flags & IFF_BROADCAST) && |
---|
1439 | !(viftable[vifi].v_flags & VIFF_TUNNEL)) { |
---|
1440 | struct sockaddr_in k_igmpsrc; |
---|
1441 | struct mbuf *mm; |
---|
1442 | struct igmpmsg *im; |
---|
1443 | int hlen = ip->ip_hl << 2; |
---|
1444 | struct timeval now; |
---|
1445 | register u_long delta; |
---|
1446 | |
---|
1447 | GET_TIME(now); |
---|
1448 | |
---|
1449 | TV_DELTA(rt->mfc_last_assert, now, delta); |
---|
1450 | |
---|
1451 | if (delta > ASSERT_MSG_TIME) { |
---|
1452 | mm = m_copy(m, 0, hlen); |
---|
1453 | if (mm && (M_HASCL(mm) || mm->m_len < hlen)) |
---|
1454 | mm = m_pullup(mm, hlen); |
---|
1455 | if (mm == NULL) { |
---|
1456 | return ENOBUFS; |
---|
1457 | } |
---|
1458 | |
---|
1459 | rt->mfc_last_assert = now; |
---|
1460 | |
---|
1461 | im = mtod(mm, struct igmpmsg *); |
---|
1462 | im->im_msgtype = IGMPMSG_WRONGVIF; |
---|
1463 | im->im_mbz = 0; |
---|
1464 | im->im_vif = vifi; |
---|
1465 | |
---|
1466 | k_igmpsrc.sin_addr = im->im_src; |
---|
1467 | |
---|
1468 | socket_send(ip_mrouter, mm, &k_igmpsrc); |
---|
1469 | } |
---|
1470 | } |
---|
1471 | return 0; |
---|
1472 | } |
---|
1473 | |
---|
1474 | /* If I sourced this packet, it counts as output, else it was input. */ |
---|
1475 | if (ip->ip_src.s_addr == viftable[vifi].v_lcl_addr.s_addr) { |
---|
1476 | viftable[vifi].v_pkt_out++; |
---|
1477 | viftable[vifi].v_bytes_out += plen; |
---|
1478 | } else { |
---|
1479 | viftable[vifi].v_pkt_in++; |
---|
1480 | viftable[vifi].v_bytes_in += plen; |
---|
1481 | } |
---|
1482 | rt->mfc_pkt_cnt++; |
---|
1483 | rt->mfc_byte_cnt += plen; |
---|
1484 | |
---|
1485 | /* |
---|
1486 | * For each vif, decide if a copy of the packet should be forwarded. |
---|
1487 | * Forward if: |
---|
1488 | * - the ttl exceeds the vif's threshold |
---|
1489 | * - there are group members downstream on interface |
---|
1490 | */ |
---|
1491 | for (vifp = viftable, vifi = 0; vifi < numvifs; vifp++, vifi++) |
---|
1492 | if ((rt->mfc_ttls[vifi] > 0) && |
---|
1493 | (ip->ip_ttl > rt->mfc_ttls[vifi])) { |
---|
1494 | vifp->v_pkt_out++; |
---|
1495 | vifp->v_bytes_out += plen; |
---|
1496 | MC_SEND(ip, vifp, m); |
---|
1497 | } |
---|
1498 | |
---|
1499 | return 0; |
---|
1500 | } |
---|
1501 | |
---|
1502 | /* |
---|
1503 | * check if a vif number is legal/ok. This is used by ip_output, to export |
---|
1504 | * numvifs there, |
---|
1505 | */ |
---|
1506 | static int |
---|
1507 | X_legal_vif_num(vif) |
---|
1508 | int vif; |
---|
1509 | { |
---|
1510 | if (vif >= 0 && vif < numvifs) |
---|
1511 | return(1); |
---|
1512 | else |
---|
1513 | return(0); |
---|
1514 | } |
---|
1515 | |
---|
1516 | #ifndef MROUTE_LKM |
---|
1517 | int (*legal_vif_num)(int) = X_legal_vif_num; |
---|
1518 | #endif |
---|
1519 | |
---|
1520 | /* |
---|
1521 | * Return the local address used by this vif |
---|
1522 | */ |
---|
1523 | static u_long |
---|
1524 | X_ip_mcast_src(vifi) |
---|
1525 | int vifi; |
---|
1526 | { |
---|
1527 | if (vifi >= 0 && vifi < numvifs) |
---|
1528 | return viftable[vifi].v_lcl_addr.s_addr; |
---|
1529 | else |
---|
1530 | return INADDR_ANY; |
---|
1531 | } |
---|
1532 | |
---|
1533 | #ifndef MROUTE_LKM |
---|
1534 | u_long (*ip_mcast_src)(int) = X_ip_mcast_src; |
---|
1535 | #endif |
---|
1536 | |
---|
1537 | static void |
---|
1538 | phyint_send(ip, vifp, m) |
---|
1539 | struct ip *ip; |
---|
1540 | struct vif *vifp; |
---|
1541 | struct mbuf *m; |
---|
1542 | { |
---|
1543 | register struct mbuf *mb_copy; |
---|
1544 | register int hlen = ip->ip_hl << 2; |
---|
1545 | |
---|
1546 | /* |
---|
1547 | * Make a new reference to the packet; make sure that |
---|
1548 | * the IP header is actually copied, not just referenced, |
---|
1549 | * so that ip_output() only scribbles on the copy. |
---|
1550 | */ |
---|
1551 | mb_copy = m_copy(m, 0, M_COPYALL); |
---|
1552 | if (mb_copy && (M_HASCL(mb_copy) || mb_copy->m_len < hlen)) |
---|
1553 | mb_copy = m_pullup(mb_copy, hlen); |
---|
1554 | if (mb_copy == NULL) |
---|
1555 | return; |
---|
1556 | |
---|
1557 | if (vifp->v_rate_limit <= 0) |
---|
1558 | tbf_send_packet(vifp, mb_copy); |
---|
1559 | else |
---|
1560 | tbf_control(vifp, mb_copy, mtod(mb_copy, struct ip *), ip->ip_len); |
---|
1561 | } |
---|
1562 | |
---|
1563 | static void |
---|
1564 | encap_send(ip, vifp, m) |
---|
1565 | register struct ip *ip; |
---|
1566 | register struct vif *vifp; |
---|
1567 | register struct mbuf *m; |
---|
1568 | { |
---|
1569 | register struct mbuf *mb_copy; |
---|
1570 | register struct ip *ip_copy; |
---|
1571 | register int i, len = ip->ip_len; |
---|
1572 | |
---|
1573 | /* |
---|
1574 | * copy the old packet & pullup it's IP header into the |
---|
1575 | * new mbuf so we can modify it. Try to fill the new |
---|
1576 | * mbuf since if we don't the ethernet driver will. |
---|
1577 | */ |
---|
1578 | MGETHDR(mb_copy, M_DONTWAIT, MT_HEADER); |
---|
1579 | if (mb_copy == NULL) |
---|
1580 | return; |
---|
1581 | mb_copy->m_data += max_linkhdr; |
---|
1582 | mb_copy->m_len = sizeof(multicast_encap_iphdr); |
---|
1583 | |
---|
1584 | if ((mb_copy->m_next = m_copy(m, 0, M_COPYALL)) == NULL) { |
---|
1585 | m_freem(mb_copy); |
---|
1586 | return; |
---|
1587 | } |
---|
1588 | i = MHLEN - M_LEADINGSPACE(mb_copy); |
---|
1589 | if (i > len) |
---|
1590 | i = len; |
---|
1591 | mb_copy = m_pullup(mb_copy, i); |
---|
1592 | if (mb_copy == NULL) |
---|
1593 | return; |
---|
1594 | mb_copy->m_pkthdr.len = len + sizeof(multicast_encap_iphdr); |
---|
1595 | |
---|
1596 | /* |
---|
1597 | * fill in the encapsulating IP header. |
---|
1598 | */ |
---|
1599 | ip_copy = mtod(mb_copy, struct ip *); |
---|
1600 | *ip_copy = multicast_encap_iphdr; |
---|
1601 | ip_copy->ip_id = htons(ip_id++); |
---|
1602 | ip_copy->ip_len += len; |
---|
1603 | ip_copy->ip_src = vifp->v_lcl_addr; |
---|
1604 | ip_copy->ip_dst = vifp->v_rmt_addr; |
---|
1605 | |
---|
1606 | /* |
---|
1607 | * turn the encapsulated IP header back into a valid one. |
---|
1608 | */ |
---|
1609 | ip = (struct ip *)((caddr_t)ip_copy + sizeof(multicast_encap_iphdr)); |
---|
1610 | --ip->ip_ttl; |
---|
1611 | HTONS(ip->ip_len); |
---|
1612 | HTONS(ip->ip_off); |
---|
1613 | ip->ip_sum = 0; |
---|
1614 | mb_copy->m_data += sizeof(multicast_encap_iphdr); |
---|
1615 | ip->ip_sum = in_cksum(mb_copy, ip->ip_hl << 2); |
---|
1616 | mb_copy->m_data -= sizeof(multicast_encap_iphdr); |
---|
1617 | |
---|
1618 | if (vifp->v_rate_limit <= 0) |
---|
1619 | tbf_send_packet(vifp, mb_copy); |
---|
1620 | else |
---|
1621 | tbf_control(vifp, mb_copy, ip, ip_copy->ip_len); |
---|
1622 | } |
---|
1623 | |
---|
1624 | /* |
---|
1625 | * De-encapsulate a packet and feed it back through ip input (this |
---|
1626 | * routine is called whenever IP gets a packet with proto type |
---|
1627 | * ENCAP_PROTO and a local destination address). |
---|
1628 | */ |
---|
1629 | void |
---|
1630 | #ifdef MROUTE_LKM |
---|
1631 | X_ipip_input(m, iphlen) |
---|
1632 | #else |
---|
1633 | ipip_input(m, iphlen) |
---|
1634 | #endif |
---|
1635 | register struct mbuf *m; |
---|
1636 | int iphlen; |
---|
1637 | { |
---|
1638 | struct ifnet *ifp = m->m_pkthdr.rcvif; |
---|
1639 | register struct ip *ip = mtod(m, struct ip *); |
---|
1640 | register int hlen = ip->ip_hl << 2; |
---|
1641 | register int s; |
---|
1642 | register struct ifqueue *ifq; |
---|
1643 | register struct vif *vifp; |
---|
1644 | |
---|
1645 | if (!have_encap_tunnel) { |
---|
1646 | rip_input(m, iphlen); |
---|
1647 | return; |
---|
1648 | } |
---|
1649 | /* |
---|
1650 | * dump the packet if it's not to a multicast destination or if |
---|
1651 | * we don't have an encapsulating tunnel with the source. |
---|
1652 | * Note: This code assumes that the remote site IP address |
---|
1653 | * uniquely identifies the tunnel (i.e., that this site has |
---|
1654 | * at most one tunnel with the remote site). |
---|
1655 | */ |
---|
1656 | if (! IN_MULTICAST(ntohl(((struct ip *)((char *)ip + hlen))->ip_dst.s_addr))) { |
---|
1657 | ++mrtstat.mrts_bad_tunnel; |
---|
1658 | m_freem(m); |
---|
1659 | return; |
---|
1660 | } |
---|
1661 | if (ip->ip_src.s_addr != last_encap_src) { |
---|
1662 | register struct vif *vife; |
---|
1663 | |
---|
1664 | vifp = viftable; |
---|
1665 | vife = vifp + numvifs; |
---|
1666 | last_encap_src = ip->ip_src.s_addr; |
---|
1667 | last_encap_vif = 0; |
---|
1668 | for ( ; vifp < vife; ++vifp) |
---|
1669 | if (vifp->v_rmt_addr.s_addr == ip->ip_src.s_addr) { |
---|
1670 | if ((vifp->v_flags & (VIFF_TUNNEL|VIFF_SRCRT)) |
---|
1671 | == VIFF_TUNNEL) |
---|
1672 | last_encap_vif = vifp; |
---|
1673 | break; |
---|
1674 | } |
---|
1675 | } |
---|
1676 | if ((vifp = last_encap_vif) == 0) { |
---|
1677 | last_encap_src = 0; |
---|
1678 | mrtstat.mrts_cant_tunnel++; /*XXX*/ |
---|
1679 | m_freem(m); |
---|
1680 | if (mrtdebug) |
---|
1681 | log(LOG_DEBUG, "ip_mforward: no tunnel with %x\n", |
---|
1682 | ntohl(ip->ip_src.s_addr)); |
---|
1683 | return; |
---|
1684 | } |
---|
1685 | ifp = vifp->v_ifp; |
---|
1686 | |
---|
1687 | if (hlen > IP_HDR_LEN) |
---|
1688 | ip_stripoptions(m, (struct mbuf *) 0); |
---|
1689 | m->m_data += IP_HDR_LEN; |
---|
1690 | m->m_len -= IP_HDR_LEN; |
---|
1691 | m->m_pkthdr.len -= IP_HDR_LEN; |
---|
1692 | m->m_pkthdr.rcvif = ifp; |
---|
1693 | |
---|
1694 | ifq = &ipintrq; |
---|
1695 | s = splimp(); |
---|
1696 | if (IF_QFULL(ifq)) { |
---|
1697 | IF_DROP(ifq); |
---|
1698 | m_freem(m); |
---|
1699 | } else { |
---|
1700 | IF_ENQUEUE(ifq, m); |
---|
1701 | /* |
---|
1702 | * normally we would need a "schednetisr(NETISR_IP)" |
---|
1703 | * here but we were called by ip_input and it is going |
---|
1704 | * to loop back & try to dequeue the packet we just |
---|
1705 | * queued as soon as we return so we avoid the |
---|
1706 | * unnecessary software interrrupt. |
---|
1707 | */ |
---|
1708 | } |
---|
1709 | splx(s); |
---|
1710 | } |
---|
1711 | |
---|
1712 | /* |
---|
1713 | * Token bucket filter module |
---|
1714 | */ |
---|
1715 | |
---|
1716 | static void |
---|
1717 | tbf_control(vifp, m, ip, p_len) |
---|
1718 | register struct vif *vifp; |
---|
1719 | register struct mbuf *m; |
---|
1720 | register struct ip *ip; |
---|
1721 | register u_long p_len; |
---|
1722 | { |
---|
1723 | register struct tbf *t = vifp->v_tbf; |
---|
1724 | |
---|
1725 | if (p_len > MAX_BKT_SIZE) { |
---|
1726 | /* drop if packet is too large */ |
---|
1727 | mrtstat.mrts_pkt2large++; |
---|
1728 | m_freem(m); |
---|
1729 | return; |
---|
1730 | } |
---|
1731 | |
---|
1732 | tbf_update_tokens(vifp); |
---|
1733 | |
---|
1734 | /* if there are enough tokens, |
---|
1735 | * and the queue is empty, |
---|
1736 | * send this packet out |
---|
1737 | */ |
---|
1738 | |
---|
1739 | if (t->tbf_q_len == 0) { |
---|
1740 | /* queue empty, send packet if enough tokens */ |
---|
1741 | if (p_len <= t->tbf_n_tok) { |
---|
1742 | t->tbf_n_tok -= p_len; |
---|
1743 | tbf_send_packet(vifp, m); |
---|
1744 | } else { |
---|
1745 | /* queue packet and timeout till later */ |
---|
1746 | tbf_queue(vifp, m); |
---|
1747 | timeout(tbf_reprocess_q, (caddr_t)vifp, TBF_REPROCESS); |
---|
1748 | } |
---|
1749 | } else if (t->tbf_q_len < t->tbf_max_q_len) { |
---|
1750 | /* finite queue length, so queue pkts and process queue */ |
---|
1751 | tbf_queue(vifp, m); |
---|
1752 | tbf_process_q(vifp); |
---|
1753 | } else { |
---|
1754 | /* queue length too much, try to dq and queue and process */ |
---|
1755 | if (!tbf_dq_sel(vifp, ip)) { |
---|
1756 | mrtstat.mrts_q_overflow++; |
---|
1757 | m_freem(m); |
---|
1758 | return; |
---|
1759 | } else { |
---|
1760 | tbf_queue(vifp, m); |
---|
1761 | tbf_process_q(vifp); |
---|
1762 | } |
---|
1763 | } |
---|
1764 | return; |
---|
1765 | } |
---|
1766 | |
---|
1767 | /* |
---|
1768 | * adds a packet to the queue at the interface |
---|
1769 | */ |
---|
1770 | static void |
---|
1771 | tbf_queue(vifp, m) |
---|
1772 | register struct vif *vifp; |
---|
1773 | register struct mbuf *m; |
---|
1774 | { |
---|
1775 | register int s = splnet(); |
---|
1776 | register struct tbf *t = vifp->v_tbf; |
---|
1777 | |
---|
1778 | if (t->tbf_t == NULL) { |
---|
1779 | /* Queue was empty */ |
---|
1780 | t->tbf_q = m; |
---|
1781 | } else { |
---|
1782 | /* Insert at tail */ |
---|
1783 | t->tbf_t->m_act = m; |
---|
1784 | } |
---|
1785 | |
---|
1786 | /* Set new tail pointer */ |
---|
1787 | t->tbf_t = m; |
---|
1788 | |
---|
1789 | #ifdef DIAGNOSTIC |
---|
1790 | /* Make sure we didn't get fed a bogus mbuf */ |
---|
1791 | if (m->m_act) |
---|
1792 | panic("tbf_queue: m_act"); |
---|
1793 | #endif |
---|
1794 | m->m_act = NULL; |
---|
1795 | |
---|
1796 | t->tbf_q_len++; |
---|
1797 | |
---|
1798 | splx(s); |
---|
1799 | } |
---|
1800 | |
---|
1801 | |
---|
1802 | /* |
---|
1803 | * processes the queue at the interface |
---|
1804 | */ |
---|
1805 | static void |
---|
1806 | tbf_process_q(vifp) |
---|
1807 | register struct vif *vifp; |
---|
1808 | { |
---|
1809 | register struct mbuf *m; |
---|
1810 | register int len; |
---|
1811 | register int s = splnet(); |
---|
1812 | register struct tbf *t = vifp->v_tbf; |
---|
1813 | |
---|
1814 | /* loop through the queue at the interface and send as many packets |
---|
1815 | * as possible |
---|
1816 | */ |
---|
1817 | while (t->tbf_q_len > 0) { |
---|
1818 | m = t->tbf_q; |
---|
1819 | |
---|
1820 | len = mtod(m, struct ip *)->ip_len; |
---|
1821 | |
---|
1822 | /* determine if the packet can be sent */ |
---|
1823 | if (len <= t->tbf_n_tok) { |
---|
1824 | /* if so, |
---|
1825 | * reduce no of tokens, dequeue the packet, |
---|
1826 | * send the packet. |
---|
1827 | */ |
---|
1828 | t->tbf_n_tok -= len; |
---|
1829 | |
---|
1830 | t->tbf_q = m->m_act; |
---|
1831 | if (--t->tbf_q_len == 0) |
---|
1832 | t->tbf_t = NULL; |
---|
1833 | |
---|
1834 | m->m_act = NULL; |
---|
1835 | tbf_send_packet(vifp, m); |
---|
1836 | |
---|
1837 | } else break; |
---|
1838 | } |
---|
1839 | splx(s); |
---|
1840 | } |
---|
1841 | |
---|
1842 | static void |
---|
1843 | tbf_reprocess_q(xvifp) |
---|
1844 | void *xvifp; |
---|
1845 | { |
---|
1846 | register struct vif *vifp = xvifp; |
---|
1847 | if (ip_mrouter == NULL) |
---|
1848 | return; |
---|
1849 | |
---|
1850 | tbf_update_tokens(vifp); |
---|
1851 | |
---|
1852 | tbf_process_q(vifp); |
---|
1853 | |
---|
1854 | if (vifp->v_tbf->tbf_q_len) |
---|
1855 | timeout(tbf_reprocess_q, (caddr_t)vifp, TBF_REPROCESS); |
---|
1856 | } |
---|
1857 | |
---|
1858 | /* function that will selectively discard a member of the queue |
---|
1859 | * based on the precedence value and the priority |
---|
1860 | */ |
---|
1861 | static int |
---|
1862 | tbf_dq_sel(vifp, ip) |
---|
1863 | register struct vif *vifp; |
---|
1864 | register struct ip *ip; |
---|
1865 | { |
---|
1866 | register int s = splnet(); |
---|
1867 | register u_int p; |
---|
1868 | register struct mbuf *m, *last; |
---|
1869 | register struct mbuf **np; |
---|
1870 | register struct tbf *t = vifp->v_tbf; |
---|
1871 | |
---|
1872 | p = priority(vifp, ip); |
---|
1873 | |
---|
1874 | np = &t->tbf_q; |
---|
1875 | last = NULL; |
---|
1876 | while ((m = *np) != NULL) { |
---|
1877 | if (p > priority(vifp, mtod(m, struct ip *))) { |
---|
1878 | *np = m->m_act; |
---|
1879 | /* If we're removing the last packet, fix the tail pointer */ |
---|
1880 | if (m == t->tbf_t) |
---|
1881 | t->tbf_t = last; |
---|
1882 | m_freem(m); |
---|
1883 | /* it's impossible for the queue to be empty, but |
---|
1884 | * we check anyway. */ |
---|
1885 | if (--t->tbf_q_len == 0) |
---|
1886 | t->tbf_t = NULL; |
---|
1887 | splx(s); |
---|
1888 | mrtstat.mrts_drop_sel++; |
---|
1889 | return(1); |
---|
1890 | } |
---|
1891 | np = &m->m_act; |
---|
1892 | last = m; |
---|
1893 | } |
---|
1894 | splx(s); |
---|
1895 | return(0); |
---|
1896 | } |
---|
1897 | |
---|
1898 | static void |
---|
1899 | tbf_send_packet(vifp, m) |
---|
1900 | register struct vif *vifp; |
---|
1901 | register struct mbuf *m; |
---|
1902 | { |
---|
1903 | struct ip_moptions imo; |
---|
1904 | int error; |
---|
1905 | static struct route ro; |
---|
1906 | int s = splnet(); |
---|
1907 | |
---|
1908 | if (vifp->v_flags & VIFF_TUNNEL) { |
---|
1909 | /* If tunnel options */ |
---|
1910 | ip_output(m, (struct mbuf *)0, &vifp->v_route, |
---|
1911 | IP_FORWARDING, (struct ip_moptions *)0); |
---|
1912 | } else { |
---|
1913 | imo.imo_multicast_ifp = vifp->v_ifp; |
---|
1914 | imo.imo_multicast_ttl = mtod(m, struct ip *)->ip_ttl - 1; |
---|
1915 | imo.imo_multicast_loop = 1; |
---|
1916 | imo.imo_multicast_vif = -1; |
---|
1917 | |
---|
1918 | /* |
---|
1919 | * Re-entrancy should not be a problem here, because |
---|
1920 | * the packets that we send out and are looped back at us |
---|
1921 | * should get rejected because they appear to come from |
---|
1922 | * the loopback interface, thus preventing looping. |
---|
1923 | */ |
---|
1924 | error = ip_output(m, (struct mbuf *)0, &ro, |
---|
1925 | IP_FORWARDING, &imo); |
---|
1926 | |
---|
1927 | if (mrtdebug & DEBUG_XMIT) |
---|
1928 | log(LOG_DEBUG, "phyint_send on vif %d err %d\n", |
---|
1929 | vifp - viftable, error); |
---|
1930 | } |
---|
1931 | splx(s); |
---|
1932 | } |
---|
1933 | |
---|
1934 | /* determine the current time and then |
---|
1935 | * the elapsed time (between the last time and time now) |
---|
1936 | * in milliseconds & update the no. of tokens in the bucket |
---|
1937 | */ |
---|
1938 | static void |
---|
1939 | tbf_update_tokens(vifp) |
---|
1940 | register struct vif *vifp; |
---|
1941 | { |
---|
1942 | struct timeval tp; |
---|
1943 | register u_long tm; |
---|
1944 | register int s = splnet(); |
---|
1945 | register struct tbf *t = vifp->v_tbf; |
---|
1946 | |
---|
1947 | GET_TIME(tp); |
---|
1948 | |
---|
1949 | TV_DELTA(tp, t->tbf_last_pkt_t, tm); |
---|
1950 | |
---|
1951 | /* |
---|
1952 | * This formula is actually |
---|
1953 | * "time in seconds" * "bytes/second". |
---|
1954 | * |
---|
1955 | * (tm / 1000000) * (v_rate_limit * 1000 * (1000/1024) / 8) |
---|
1956 | * |
---|
1957 | * The (1000/1024) was introduced in add_vif to optimize |
---|
1958 | * this divide into a shift. |
---|
1959 | */ |
---|
1960 | t->tbf_n_tok += tm * vifp->v_rate_limit / 1024 / 8; |
---|
1961 | t->tbf_last_pkt_t = tp; |
---|
1962 | |
---|
1963 | if (t->tbf_n_tok > MAX_BKT_SIZE) |
---|
1964 | t->tbf_n_tok = MAX_BKT_SIZE; |
---|
1965 | |
---|
1966 | splx(s); |
---|
1967 | } |
---|
1968 | |
---|
1969 | static int |
---|
1970 | priority(vifp, ip) |
---|
1971 | register struct vif *vifp; |
---|
1972 | register struct ip *ip; |
---|
1973 | { |
---|
1974 | register int prio; |
---|
1975 | |
---|
1976 | /* temporary hack; may add general packet classifier some day */ |
---|
1977 | |
---|
1978 | /* |
---|
1979 | * The UDP port space is divided up into four priority ranges: |
---|
1980 | * [0, 16384) : unclassified - lowest priority |
---|
1981 | * [16384, 32768) : audio - highest priority |
---|
1982 | * [32768, 49152) : whiteboard - medium priority |
---|
1983 | * [49152, 65536) : video - low priority |
---|
1984 | */ |
---|
1985 | if (ip->ip_p == IPPROTO_UDP) { |
---|
1986 | struct udphdr *udp = (struct udphdr *)(((char *)ip) + (ip->ip_hl << 2)); |
---|
1987 | switch (ntohs(udp->uh_dport) & 0xc000) { |
---|
1988 | case 0x4000: |
---|
1989 | prio = 70; |
---|
1990 | break; |
---|
1991 | case 0x8000: |
---|
1992 | prio = 60; |
---|
1993 | break; |
---|
1994 | case 0xc000: |
---|
1995 | prio = 55; |
---|
1996 | break; |
---|
1997 | default: |
---|
1998 | prio = 50; |
---|
1999 | break; |
---|
2000 | } |
---|
2001 | if (tbfdebug > 1) |
---|
2002 | log(LOG_DEBUG, "port %x prio%d\n", ntohs(udp->uh_dport), prio); |
---|
2003 | } else { |
---|
2004 | prio = 50; |
---|
2005 | } |
---|
2006 | return prio; |
---|
2007 | } |
---|
2008 | |
---|
2009 | /* |
---|
2010 | * End of token bucket filter modifications |
---|
2011 | */ |
---|
2012 | |
---|
2013 | int |
---|
2014 | ip_rsvp_vif_init(so, m) |
---|
2015 | struct socket *so; |
---|
2016 | struct mbuf *m; |
---|
2017 | { |
---|
2018 | int i; |
---|
2019 | register int s; |
---|
2020 | |
---|
2021 | if (rsvpdebug) |
---|
2022 | printf("ip_rsvp_vif_init: so_type = %d, pr_protocol = %d\n", |
---|
2023 | so->so_type, so->so_proto->pr_protocol); |
---|
2024 | |
---|
2025 | if (so->so_type != SOCK_RAW || so->so_proto->pr_protocol != IPPROTO_RSVP) |
---|
2026 | return EOPNOTSUPP; |
---|
2027 | |
---|
2028 | /* Check mbuf. */ |
---|
2029 | if (m == NULL || m->m_len != sizeof(int)) { |
---|
2030 | return EINVAL; |
---|
2031 | } |
---|
2032 | i = *(mtod(m, int *)); |
---|
2033 | |
---|
2034 | if (rsvpdebug) |
---|
2035 | printf("ip_rsvp_vif_init: vif = %d rsvp_on = %d\n",i,rsvp_on); |
---|
2036 | |
---|
2037 | s = splnet(); |
---|
2038 | |
---|
2039 | /* Check vif. */ |
---|
2040 | if (!legal_vif_num(i)) { |
---|
2041 | splx(s); |
---|
2042 | return EADDRNOTAVAIL; |
---|
2043 | } |
---|
2044 | |
---|
2045 | /* Check if socket is available. */ |
---|
2046 | if (viftable[i].v_rsvpd != NULL) { |
---|
2047 | splx(s); |
---|
2048 | return EADDRINUSE; |
---|
2049 | } |
---|
2050 | |
---|
2051 | viftable[i].v_rsvpd = so; |
---|
2052 | /* This may seem silly, but we need to be sure we don't over-increment |
---|
2053 | * the RSVP counter, in case something slips up. |
---|
2054 | */ |
---|
2055 | if (!viftable[i].v_rsvp_on) { |
---|
2056 | viftable[i].v_rsvp_on = 1; |
---|
2057 | rsvp_on++; |
---|
2058 | } |
---|
2059 | |
---|
2060 | splx(s); |
---|
2061 | return 0; |
---|
2062 | } |
---|
2063 | |
---|
2064 | int |
---|
2065 | ip_rsvp_vif_done(so, m) |
---|
2066 | struct socket *so; |
---|
2067 | struct mbuf *m; |
---|
2068 | { |
---|
2069 | int i; |
---|
2070 | register int s; |
---|
2071 | |
---|
2072 | if (rsvpdebug) |
---|
2073 | printf("ip_rsvp_vif_done: so_type = %d, pr_protocol = %d\n", |
---|
2074 | so->so_type, so->so_proto->pr_protocol); |
---|
2075 | |
---|
2076 | if (so->so_type != SOCK_RAW || so->so_proto->pr_protocol != IPPROTO_RSVP) |
---|
2077 | return EOPNOTSUPP; |
---|
2078 | |
---|
2079 | /* Check mbuf. */ |
---|
2080 | if (m == NULL || m->m_len != sizeof(int)) { |
---|
2081 | return EINVAL; |
---|
2082 | } |
---|
2083 | i = *(mtod(m, int *)); |
---|
2084 | |
---|
2085 | s = splnet(); |
---|
2086 | |
---|
2087 | /* Check vif. */ |
---|
2088 | if (!legal_vif_num(i)) { |
---|
2089 | splx(s); |
---|
2090 | return EADDRNOTAVAIL; |
---|
2091 | } |
---|
2092 | |
---|
2093 | if (rsvpdebug) |
---|
2094 | printf("ip_rsvp_vif_done: v_rsvpd = %p so = %p\n", |
---|
2095 | viftable[i].v_rsvpd, so); |
---|
2096 | |
---|
2097 | viftable[i].v_rsvpd = NULL; |
---|
2098 | /* This may seem silly, but we need to be sure we don't over-decrement |
---|
2099 | * the RSVP counter, in case something slips up. |
---|
2100 | */ |
---|
2101 | if (viftable[i].v_rsvp_on) { |
---|
2102 | viftable[i].v_rsvp_on = 0; |
---|
2103 | rsvp_on--; |
---|
2104 | } |
---|
2105 | |
---|
2106 | splx(s); |
---|
2107 | return 0; |
---|
2108 | } |
---|
2109 | |
---|
2110 | void |
---|
2111 | ip_rsvp_force_done(so) |
---|
2112 | struct socket *so; |
---|
2113 | { |
---|
2114 | int vifi; |
---|
2115 | register int s; |
---|
2116 | |
---|
2117 | /* Don't bother if it is not the right type of socket. */ |
---|
2118 | if (so->so_type != SOCK_RAW || so->so_proto->pr_protocol != IPPROTO_RSVP) |
---|
2119 | return; |
---|
2120 | |
---|
2121 | s = splnet(); |
---|
2122 | |
---|
2123 | /* The socket may be attached to more than one vif...this |
---|
2124 | * is perfectly legal. |
---|
2125 | */ |
---|
2126 | for (vifi = 0; vifi < numvifs; vifi++) { |
---|
2127 | if (viftable[vifi].v_rsvpd == so) { |
---|
2128 | viftable[vifi].v_rsvpd = NULL; |
---|
2129 | /* This may seem silly, but we need to be sure we don't |
---|
2130 | * over-decrement the RSVP counter, in case something slips up. |
---|
2131 | */ |
---|
2132 | if (viftable[vifi].v_rsvp_on) { |
---|
2133 | viftable[vifi].v_rsvp_on = 0; |
---|
2134 | rsvp_on--; |
---|
2135 | } |
---|
2136 | } |
---|
2137 | } |
---|
2138 | |
---|
2139 | splx(s); |
---|
2140 | return; |
---|
2141 | } |
---|
2142 | |
---|
2143 | void |
---|
2144 | rsvp_input(m, iphlen) |
---|
2145 | struct mbuf *m; |
---|
2146 | int iphlen; |
---|
2147 | { |
---|
2148 | int vifi; |
---|
2149 | register struct ip *ip = mtod(m, struct ip *); |
---|
2150 | static struct sockaddr_in rsvp_src = { sizeof rsvp_src, AF_INET }; |
---|
2151 | register int s; |
---|
2152 | struct ifnet *ifp; |
---|
2153 | |
---|
2154 | if (rsvpdebug) |
---|
2155 | printf("rsvp_input: rsvp_on %d\n",rsvp_on); |
---|
2156 | |
---|
2157 | /* Can still get packets with rsvp_on = 0 if there is a local member |
---|
2158 | * of the group to which the RSVP packet is addressed. But in this |
---|
2159 | * case we want to throw the packet away. |
---|
2160 | */ |
---|
2161 | if (!rsvp_on) { |
---|
2162 | m_freem(m); |
---|
2163 | return; |
---|
2164 | } |
---|
2165 | |
---|
2166 | /* If the old-style non-vif-associated socket is set, then use |
---|
2167 | * it and ignore the new ones. |
---|
2168 | */ |
---|
2169 | if (ip_rsvpd != NULL) { |
---|
2170 | if (rsvpdebug) |
---|
2171 | printf("rsvp_input: Sending packet up old-style socket\n"); |
---|
2172 | rip_input(m, iphlen); |
---|
2173 | return; |
---|
2174 | } |
---|
2175 | |
---|
2176 | s = splnet(); |
---|
2177 | |
---|
2178 | if (rsvpdebug) |
---|
2179 | printf("rsvp_input: check vifs\n"); |
---|
2180 | |
---|
2181 | #ifdef DIAGNOSTIC |
---|
2182 | if (!(m->m_flags & M_PKTHDR)) |
---|
2183 | panic("rsvp_input no hdr"); |
---|
2184 | #endif |
---|
2185 | |
---|
2186 | ifp = m->m_pkthdr.rcvif; |
---|
2187 | /* Find which vif the packet arrived on. */ |
---|
2188 | for (vifi = 0; vifi < numvifs; vifi++) { |
---|
2189 | if (viftable[vifi].v_ifp == ifp) |
---|
2190 | break; |
---|
2191 | } |
---|
2192 | |
---|
2193 | if (vifi == numvifs) { |
---|
2194 | /* Can't find vif packet arrived on. Drop packet. */ |
---|
2195 | if (rsvpdebug) |
---|
2196 | printf("rsvp_input: Can't find vif for packet...dropping it.\n"); |
---|
2197 | m_freem(m); |
---|
2198 | splx(s); |
---|
2199 | return; |
---|
2200 | } |
---|
2201 | |
---|
2202 | if (rsvpdebug) |
---|
2203 | printf("rsvp_input: check socket\n"); |
---|
2204 | |
---|
2205 | if (viftable[vifi].v_rsvpd == NULL) { |
---|
2206 | /* drop packet, since there is no specific socket for this |
---|
2207 | * interface */ |
---|
2208 | if (rsvpdebug) |
---|
2209 | printf("rsvp_input: No socket defined for vif %d\n",vifi); |
---|
2210 | m_freem(m); |
---|
2211 | splx(s); |
---|
2212 | return; |
---|
2213 | } |
---|
2214 | rsvp_src.sin_addr = ip->ip_src; |
---|
2215 | |
---|
2216 | if (rsvpdebug && m) |
---|
2217 | printf("rsvp_input: m->m_len = %d, sbspace() = %ld\n", |
---|
2218 | m->m_len,sbspace(&(viftable[vifi].v_rsvpd->so_rcv))); |
---|
2219 | |
---|
2220 | if (socket_send(viftable[vifi].v_rsvpd, m, &rsvp_src) < 0) |
---|
2221 | if (rsvpdebug) |
---|
2222 | printf("rsvp_input: Failed to append to socket\n"); |
---|
2223 | else |
---|
2224 | if (rsvpdebug) |
---|
2225 | printf("rsvp_input: send packet up\n"); |
---|
2226 | |
---|
2227 | splx(s); |
---|
2228 | } |
---|
2229 | |
---|
2230 | #ifdef MROUTE_LKM |
---|
2231 | #include <sys/conf.h> |
---|
2232 | #include <sys/exec.h> |
---|
2233 | #include <sys/sysent.h> |
---|
2234 | #include <sys/lkm.h> |
---|
2235 | |
---|
2236 | MOD_MISC("ip_mroute_mod") |
---|
2237 | |
---|
2238 | static int |
---|
2239 | ip_mroute_mod_handle(struct lkm_table *lkmtp, int cmd) |
---|
2240 | { |
---|
2241 | int i; |
---|
2242 | struct lkm_misc *args = lkmtp->private.lkm_misc; |
---|
2243 | int err = 0; |
---|
2244 | |
---|
2245 | switch(cmd) { |
---|
2246 | static int (*old_ip_mrouter_cmd)(); |
---|
2247 | static int (*old_ip_mrouter_done)(); |
---|
2248 | static int (*old_ip_mforward)(); |
---|
2249 | static int (*old_mrt_ioctl)(); |
---|
2250 | static void (*old_proto4_input)(); |
---|
2251 | static int (*old_legal_vif_num)(); |
---|
2252 | extern struct protosw inetsw[]; |
---|
2253 | |
---|
2254 | case LKM_E_LOAD: |
---|
2255 | if(lkmexists(lkmtp) || ip_mrtproto) |
---|
2256 | return(EEXIST); |
---|
2257 | old_ip_mrouter_cmd = ip_mrouter_cmd; |
---|
2258 | ip_mrouter_cmd = X_ip_mrouter_cmd; |
---|
2259 | old_ip_mrouter_done = ip_mrouter_done; |
---|
2260 | ip_mrouter_done = X_ip_mrouter_done; |
---|
2261 | old_ip_mforward = ip_mforward; |
---|
2262 | ip_mforward = X_ip_mforward; |
---|
2263 | old_mrt_ioctl = mrt_ioctl; |
---|
2264 | mrt_ioctl = X_mrt_ioctl; |
---|
2265 | old_proto4_input = inetsw[ip_protox[ENCAP_PROTO]].pr_input; |
---|
2266 | inetsw[ip_protox[ENCAP_PROTO]].pr_input = X_ipip_input; |
---|
2267 | old_legal_vif_num = legal_vif_num; |
---|
2268 | legal_vif_num = X_legal_vif_num; |
---|
2269 | ip_mrtproto = IGMP_DVMRP; |
---|
2270 | |
---|
2271 | printf("\nIP multicast routing loaded\n"); |
---|
2272 | break; |
---|
2273 | |
---|
2274 | case LKM_E_UNLOAD: |
---|
2275 | if (ip_mrouter) |
---|
2276 | return EINVAL; |
---|
2277 | |
---|
2278 | ip_mrouter_cmd = old_ip_mrouter_cmd; |
---|
2279 | ip_mrouter_done = old_ip_mrouter_done; |
---|
2280 | ip_mforward = old_ip_mforward; |
---|
2281 | mrt_ioctl = old_mrt_ioctl; |
---|
2282 | inetsw[ip_protox[ENCAP_PROTO]].pr_input = old_proto4_input; |
---|
2283 | legal_vif_num = old_legal_vif_num; |
---|
2284 | ip_mrtproto = 0; |
---|
2285 | break; |
---|
2286 | |
---|
2287 | default: |
---|
2288 | err = EINVAL; |
---|
2289 | break; |
---|
2290 | } |
---|
2291 | |
---|
2292 | return(err); |
---|
2293 | } |
---|
2294 | |
---|
2295 | int |
---|
2296 | ip_mroute_mod(struct lkm_table *lkmtp, int cmd, int ver) { |
---|
2297 | DISPATCH(lkmtp, cmd, ver, ip_mroute_mod_handle, ip_mroute_mod_handle, |
---|
2298 | nosys); |
---|
2299 | } |
---|
2300 | |
---|
2301 | #endif /* MROUTE_LKM */ |
---|
2302 | #endif /* MROUTING */ |
---|