1 | /* |
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2 | * Copyright (c) 1980, 1986, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 4. Neither the name of the University nor the names of its contributors |
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14 | * may be used to endorse or promote products derived from this software |
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15 | * without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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27 | * SUCH DAMAGE. |
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28 | * |
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29 | * @(#)raw_usrreq.c 8.1 (Berkeley) 6/10/93 |
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30 | * $FreeBSD: src/sys/net/raw_usrreq.c,v 1.44 2006/11/06 13:42:02 rwatson Exp $ |
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31 | */ |
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32 | |
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33 | /* |
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34 | * $Id$ |
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35 | */ |
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36 | |
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37 | #include <sys/param.h> |
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38 | #include <sys/queue.h> |
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39 | #include <sys/systm.h> |
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40 | #include <sys/mbuf.h> |
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41 | #include <sys/domain.h> |
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42 | #include <sys/protosw.h> |
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43 | #include <sys/socket.h> |
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44 | #include <sys/socketvar.h> |
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45 | #include <sys/errno.h> |
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46 | |
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47 | #include <net/if.h> |
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48 | #include <net/route.h> |
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49 | #include <net/netisr.h> |
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50 | #include <net/raw_cb.h> |
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51 | |
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52 | /* |
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53 | * Initialize raw connection block q. |
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54 | */ |
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55 | void |
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56 | raw_init() |
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57 | { |
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58 | |
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59 | rawcb.rcb_next = rawcb.rcb_prev = &rawcb; |
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60 | } |
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61 | |
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62 | |
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63 | /* |
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64 | * Raw protocol input routine. Find the socket |
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65 | * associated with the packet(s) and move them over. If |
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66 | * nothing exists for this packet, drop it. |
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67 | */ |
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68 | /* |
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69 | * Raw protocol interface. |
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70 | */ |
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71 | void |
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72 | raw_input(m0, proto, src, dst) |
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73 | struct mbuf *m0; |
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74 | register struct sockproto *proto; |
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75 | struct sockaddr *src, *dst; |
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76 | { |
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77 | register struct rawcb *rp; |
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78 | register struct mbuf *m = m0; |
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79 | register int sockets = 0; |
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80 | struct socket *last; |
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81 | |
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82 | last = 0; |
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83 | for (rp = rawcb.rcb_next; rp != &rawcb; rp = rp->rcb_next) { |
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84 | if (rp->rcb_proto.sp_family != proto->sp_family) |
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85 | continue; |
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86 | if (rp->rcb_proto.sp_protocol && |
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87 | rp->rcb_proto.sp_protocol != proto->sp_protocol) |
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88 | continue; |
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89 | /* |
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90 | * We assume the lower level routines have |
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91 | * placed the address in a canonical format |
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92 | * suitable for a structure comparison. |
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93 | * |
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94 | * Note that if the lengths are not the same |
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95 | * the comparison will fail at the first byte. |
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96 | */ |
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97 | #define equal(a1, a2) \ |
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98 | (bcmp((caddr_t)(a1), (caddr_t)(a2), a1->sa_len) == 0) |
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99 | if (rp->rcb_laddr && !equal(rp->rcb_laddr, dst)) |
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100 | continue; |
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101 | if (rp->rcb_faddr && !equal(rp->rcb_faddr, src)) |
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102 | continue; |
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103 | if (last) { |
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104 | struct mbuf *n; |
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105 | n = m_copy(m, 0, (int)M_COPYALL); |
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106 | if (n) { |
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107 | if (sbappendaddr(&last->so_rcv, src, |
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108 | n, (struct mbuf *)0) == 0) |
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109 | /* should notify about lost packet */ |
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110 | m_freem(n); |
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111 | else { |
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112 | sorwakeup(last); |
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113 | sockets++; |
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114 | } |
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115 | } |
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116 | } |
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117 | last = rp->rcb_socket; |
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118 | } |
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119 | if (last) { |
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120 | if (sbappendaddr(&last->so_rcv, src, |
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121 | m, (struct mbuf *)0) == 0) |
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122 | m_freem(m); |
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123 | else { |
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124 | sorwakeup(last); |
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125 | sockets++; |
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126 | } |
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127 | } else |
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128 | m_freem(m); |
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129 | } |
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130 | |
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131 | /*ARGSUSED*/ |
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132 | void |
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133 | raw_ctlinput(cmd, arg, dummy) |
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134 | int cmd; |
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135 | struct sockaddr *arg; |
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136 | void *dummy; |
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137 | { |
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138 | |
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139 | if (cmd < 0 || cmd > PRC_NCMDS) |
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140 | return; |
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141 | /* INCOMPLETE */ |
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142 | } |
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143 | |
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144 | /*ARGSUSED*/ |
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145 | int |
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146 | raw_usrreq(so, req, m, nam, control) |
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147 | struct socket *so; |
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148 | int req; |
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149 | struct mbuf *m, *nam, *control; |
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150 | { |
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151 | register struct rawcb *rp = sotorawcb(so); |
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152 | register int error = 0; |
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153 | int len; |
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154 | |
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155 | if (req == PRU_CONTROL) |
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156 | return (EOPNOTSUPP); |
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157 | if (control && control->m_len) { |
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158 | error = EOPNOTSUPP; |
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159 | goto release; |
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160 | } |
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161 | if (rp == 0) { |
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162 | error = EINVAL; |
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163 | goto release; |
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164 | } |
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165 | switch (req) { |
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166 | |
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167 | /* |
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168 | * Allocate a raw control block and fill in the |
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169 | * necessary info to allow packets to be routed to |
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170 | * the appropriate raw interface routine. |
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171 | */ |
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172 | case PRU_ATTACH: |
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173 | if ((so->so_state & SS_PRIV) == 0) { |
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174 | error = EACCES; |
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175 | break; |
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176 | } |
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177 | error = raw_attach(so, (intptr_t)nam); |
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178 | break; |
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179 | |
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180 | /* |
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181 | * Destroy state just before socket deallocation. |
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182 | * Flush data or not depending on the options. |
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183 | */ |
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184 | case PRU_DETACH: |
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185 | if (rp == 0) { |
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186 | error = ENOTCONN; |
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187 | break; |
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188 | } |
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189 | raw_detach(rp); |
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190 | break; |
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191 | |
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192 | /* |
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193 | * If a socket isn't bound to a single address, |
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194 | * the raw input routine will hand it anything |
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195 | * within that protocol family (assuming there's |
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196 | * nothing else around it should go to). |
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197 | */ |
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198 | case PRU_CONNECT: |
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199 | error = EINVAL; |
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200 | #if 0 |
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201 | if (rp->rcb_faddr) { |
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202 | error = EISCONN; |
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203 | break; |
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204 | } |
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205 | nam = m_copym(nam, 0, M_COPYALL, M_WAIT); |
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206 | rp->rcb_faddr = mtod(nam, struct sockaddr *); |
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207 | soisconnected(so); |
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208 | #endif |
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209 | break; |
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210 | |
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211 | case PRU_BIND: |
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212 | error = EINVAL; |
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213 | #if 0 |
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214 | if (rp->rcb_laddr) { |
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215 | error = EINVAL; /* XXX */ |
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216 | break; |
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217 | } |
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218 | error = raw_bind(so, nam); |
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219 | #endif |
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220 | break; |
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221 | |
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222 | case PRU_CONNECT2: |
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223 | error = EOPNOTSUPP; |
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224 | goto release; |
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225 | |
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226 | case PRU_DISCONNECT: |
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227 | if (rp->rcb_faddr == 0) { |
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228 | error = ENOTCONN; |
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229 | break; |
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230 | } |
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231 | raw_disconnect(rp); |
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232 | soisdisconnected(so); |
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233 | break; |
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234 | |
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235 | /* |
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236 | * Mark the connection as being incapable of further input. |
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237 | */ |
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238 | case PRU_SHUTDOWN: |
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239 | socantsendmore(so); |
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240 | break; |
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241 | |
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242 | /* |
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243 | * Ship a packet out. The appropriate raw output |
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244 | * routine handles any massaging necessary. |
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245 | */ |
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246 | case PRU_SEND: |
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247 | if (nam) { |
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248 | if (rp->rcb_faddr) { |
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249 | error = EISCONN; |
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250 | break; |
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251 | } |
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252 | rp->rcb_faddr = mtod(nam, struct sockaddr *); |
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253 | } else if (rp->rcb_faddr == 0) { |
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254 | error = ENOTCONN; |
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255 | break; |
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256 | } |
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257 | error = (*so->so_proto->pr_output)(m, so); |
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258 | m = NULL; |
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259 | if (nam) |
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260 | rp->rcb_faddr = 0; |
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261 | break; |
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262 | |
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263 | case PRU_ABORT: |
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264 | raw_disconnect(rp); |
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265 | sofree(so); |
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266 | soisdisconnected(so); |
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267 | break; |
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268 | |
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269 | case PRU_SENSE: |
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270 | /* |
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271 | * stat: don't bother with a blocksize. |
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272 | */ |
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273 | return (0); |
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274 | |
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275 | /* |
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276 | * Not supported. |
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277 | */ |
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278 | case PRU_RCVOOB: |
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279 | case PRU_RCVD: |
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280 | return(EOPNOTSUPP); |
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281 | |
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282 | case PRU_LISTEN: |
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283 | case PRU_ACCEPT: |
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284 | case PRU_SENDOOB: |
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285 | error = EOPNOTSUPP; |
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286 | break; |
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287 | |
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288 | case PRU_SOCKADDR: |
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289 | if (rp->rcb_laddr == 0) { |
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290 | error = EINVAL; |
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291 | break; |
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292 | } |
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293 | len = rp->rcb_laddr->sa_len; |
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294 | bcopy((caddr_t)rp->rcb_laddr, mtod(nam, caddr_t), (unsigned)len); |
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295 | nam->m_len = len; |
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296 | break; |
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297 | |
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298 | case PRU_PEERADDR: |
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299 | if (rp->rcb_faddr == 0) { |
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300 | error = ENOTCONN; |
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301 | break; |
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302 | } |
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303 | len = rp->rcb_faddr->sa_len; |
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304 | bcopy((caddr_t)rp->rcb_faddr, mtod(nam, caddr_t), (unsigned)len); |
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305 | nam->m_len = len; |
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306 | break; |
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307 | |
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308 | default: |
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309 | panic("raw_usrreq"); |
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310 | } |
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311 | release: |
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312 | if (m != NULL) |
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313 | m_freem(m); |
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314 | return (error); |
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315 | } |
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