1 | /* |
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2 | * $Id$ |
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3 | */ |
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4 | |
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5 | #include <string.h> |
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6 | #include <stdarg.h> |
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7 | #include <stdio.h> |
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8 | #include <errno.h> |
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9 | |
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10 | #include <rtems.h> |
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11 | #include <rtems/libio.h> |
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12 | #include <rtems/error.h> |
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13 | #include <rtems/rtems_bsdnet.h> |
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14 | #include <sys/types.h> |
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15 | #include <sys/param.h> |
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16 | #include <sys/domain.h> |
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17 | #include <sys/mbuf.h> |
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18 | #include <sys/socketvar.h> |
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19 | #include <sys/socket.h> |
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20 | #include <sys/sockio.h> |
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21 | #include <sys/callout.h> |
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22 | #include <sys/proc.h> |
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23 | #include <sys/ioctl.h> |
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24 | #include <net/if.h> |
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25 | #include <net/route.h> |
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26 | #include <netinet/in.h> |
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27 | #include <vm/vm.h> |
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28 | #include <arpa/inet.h> |
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29 | |
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30 | #include <net/netisr.h> |
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31 | #include <net/route.h> |
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32 | |
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33 | /* |
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34 | * Memory allocation |
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35 | */ |
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36 | static int nmbuf = (64 * 1024) / MSIZE; |
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37 | int nmbclusters = (128 * 1024) / MCLBYTES; |
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38 | |
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39 | /* |
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40 | * Socket buffering parameters |
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41 | */ |
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42 | unsigned long sb_efficiency = 8; |
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43 | |
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44 | /* |
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45 | * Network task synchronization |
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46 | */ |
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47 | static rtems_id networkSemaphore; |
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48 | static rtems_id networkDaemonTid; |
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49 | static rtems_unsigned32 networkDaemonPriority; |
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50 | static void networkDaemon (void *task_argument); |
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51 | |
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52 | /* |
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53 | * Network timing |
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54 | */ |
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55 | int rtems_bsdnet_ticks_per_second; |
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56 | int rtems_bsdnet_microseconds_per_tick; |
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57 | |
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58 | /* |
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59 | * Callout processing |
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60 | */ |
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61 | static rtems_interval ticksWhenCalloutsLastChecked; |
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62 | static struct callout *callfree, calltodo; |
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63 | |
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64 | /* |
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65 | * FreeBSD variables |
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66 | */ |
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67 | int nfs_diskless_valid; |
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68 | |
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69 | /* |
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70 | * BOOTP values |
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71 | */ |
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72 | struct in_addr rtems_bsdnet_log_host_address; |
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73 | struct in_addr rtems_bsdnet_bootp_server_address; |
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74 | char *rtems_bsdnet_bootp_boot_file_name; |
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75 | char *rtems_bsdnet_bootp_server_name; |
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76 | char *rtems_bsdnet_domain_name; |
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77 | struct in_addr rtems_bsdnet_nameserver[sizeof rtems_bsdnet_config.name_server / |
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78 | sizeof rtems_bsdnet_config.name_server[0]]; |
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79 | int rtems_bsdnet_nameserver_count; |
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80 | struct in_addr rtems_bsdnet_ntpserver[sizeof rtems_bsdnet_config.ntp_server / |
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81 | sizeof rtems_bsdnet_config.ntp_server[0]]; |
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82 | int rtems_bsdnet_ntpserver_count; |
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83 | long rtems_bsdnet_timeoffset; |
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84 | |
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85 | /* |
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86 | * Perform FreeBSD memory allocation. |
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87 | * FIXME: This should be modified to keep memory allocation statistics. |
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88 | */ |
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89 | #undef malloc |
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90 | #undef free |
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91 | extern void *malloc (size_t); |
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92 | extern void free (void *); |
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93 | void * |
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94 | rtems_bsdnet_malloc (unsigned long size, int type, int flags) |
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95 | { |
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96 | void *p; |
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97 | int try = 0; |
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98 | |
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99 | for (;;) { |
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100 | p = malloc (size); |
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101 | if (p || (flags & M_NOWAIT)) |
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102 | return p; |
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103 | rtems_bsdnet_semaphore_release (); |
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104 | if (++try >= 30) { |
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105 | printf ("rtems_bsdnet_malloc still waiting.\n"); |
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106 | try = 0; |
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107 | } |
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108 | rtems_task_wake_after (rtems_bsdnet_ticks_per_second); |
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109 | rtems_bsdnet_semaphore_obtain (); |
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110 | } |
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111 | } |
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112 | |
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113 | /* |
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114 | * Free FreeBSD memory |
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115 | * FIXME: This should be modified to keep memory allocation statistics. |
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116 | */ |
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117 | void |
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118 | rtems_bsdnet_free (void *addr, int type) |
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119 | { |
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120 | free (addr); |
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121 | } |
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122 | |
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123 | /* |
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124 | * Do the initializations required by the BSD code |
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125 | */ |
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126 | static int |
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127 | bsd_init (void) |
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128 | { |
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129 | int i; |
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130 | char *p; |
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131 | |
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132 | /* |
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133 | * Set up mbuf cluster data strutures |
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134 | */ |
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135 | p = malloc ((nmbclusters*MCLBYTES)+MCLBYTES-1); |
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136 | p = (char *)(((unsigned long)p + (MCLBYTES-1)) & ~(MCLBYTES-1)); |
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137 | if (p == NULL) { |
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138 | printf ("Can't get network cluster memory.\n"); |
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139 | return -1; |
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140 | } |
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141 | mbutl = (struct mbuf *)p; |
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142 | for (i = 0; i < nmbclusters; i++) { |
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143 | ((union mcluster *)p)->mcl_next = mclfree; |
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144 | mclfree = (union mcluster *)p; |
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145 | p += MCLBYTES; |
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146 | mbstat.m_clfree++; |
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147 | } |
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148 | mbstat.m_clusters = nmbclusters; |
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149 | mclrefcnt = malloc (nmbclusters); |
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150 | if (mclrefcnt == NULL) { |
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151 | printf ("Can't get mbuf cluster reference counts memory.\n"); |
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152 | return -1; |
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153 | } |
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154 | memset (mclrefcnt, '\0', nmbclusters); |
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155 | |
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156 | /* |
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157 | * Set up mbuf data structures |
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158 | */ |
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159 | |
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160 | p = malloc(nmbuf * MSIZE + MSIZE - 1); |
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161 | p = (char *)(((unsigned int)p + MSIZE - 1) & ~(MSIZE - 1)); |
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162 | if (p == NULL) { |
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163 | printf ("Can't get network memory.\n"); |
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164 | return -1; |
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165 | } |
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166 | for (i = 0; i < nmbuf; i++) { |
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167 | ((struct mbuf *)p)->m_next = mmbfree; |
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168 | mmbfree = (struct mbuf *)p; |
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169 | p += MSIZE; |
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170 | } |
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171 | mbstat.m_mbufs = nmbuf; |
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172 | mbstat.m_mtypes[MT_FREE] = nmbuf; |
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173 | |
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174 | /* |
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175 | * Set up domains |
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176 | */ |
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177 | { |
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178 | extern struct domain routedomain; |
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179 | extern struct domain inetdomain; |
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180 | |
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181 | routedomain.dom_next = domains; |
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182 | domains = &routedomain; |
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183 | inetdomain.dom_next = domains; |
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184 | domains = &inetdomain; |
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185 | domaininit (NULL); |
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186 | } |
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187 | |
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188 | /* |
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189 | * Set up interfaces |
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190 | */ |
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191 | ifinit (NULL); |
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192 | return 0; |
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193 | } |
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194 | |
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195 | /* |
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196 | * Initialize and start network operations |
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197 | */ |
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198 | static int |
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199 | rtems_bsdnet_initialize (void) |
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200 | { |
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201 | rtems_status_code sc; |
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202 | |
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203 | /* |
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204 | * Set the priority of all network tasks |
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205 | */ |
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206 | if (rtems_bsdnet_config.network_task_priority == 0) |
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207 | networkDaemonPriority = 100; |
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208 | else |
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209 | networkDaemonPriority = rtems_bsdnet_config.network_task_priority; |
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210 | |
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211 | /* |
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212 | * Set the memory allocation limits |
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213 | */ |
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214 | if (rtems_bsdnet_config.mbuf_bytecount) |
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215 | nmbuf = rtems_bsdnet_config.mbuf_bytecount / MSIZE; |
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216 | if (rtems_bsdnet_config.mbuf_cluster_bytecount) |
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217 | nmbclusters = rtems_bsdnet_config.mbuf_cluster_bytecount / MCLBYTES; |
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218 | |
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219 | /* |
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220 | * Create the task-synchronization semaphore |
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221 | */ |
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222 | sc = rtems_semaphore_create (rtems_build_name('B', 'S', 'D', 'n'), |
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223 | 0, |
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224 | RTEMS_FIFO | |
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225 | RTEMS_BINARY_SEMAPHORE | |
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226 | RTEMS_NO_INHERIT_PRIORITY | |
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227 | RTEMS_NO_PRIORITY_CEILING | |
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228 | RTEMS_LOCAL, |
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229 | 0, |
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230 | &networkSemaphore); |
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231 | if (sc != RTEMS_SUCCESSFUL) { |
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232 | printf ("Can't create network seamphore: `%s'\n", rtems_status_text (sc)); |
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233 | return -1; |
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234 | } |
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235 | |
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236 | /* |
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237 | * Compute clock tick conversion factors |
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238 | */ |
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239 | rtems_clock_get (RTEMS_CLOCK_GET_TICKS_PER_SECOND, &rtems_bsdnet_ticks_per_second); |
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240 | if (rtems_bsdnet_ticks_per_second <= 0) |
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241 | rtems_bsdnet_ticks_per_second = 1; |
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242 | rtems_bsdnet_microseconds_per_tick = 1000000 / rtems_bsdnet_ticks_per_second; |
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243 | |
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244 | /* |
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245 | * Ensure that `seconds' is greater than 0 |
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246 | */ |
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247 | rtems_task_wake_after (rtems_bsdnet_ticks_per_second); |
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248 | |
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249 | /* |
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250 | * Set up BSD-style sockets |
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251 | */ |
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252 | if (bsd_init () < 0) |
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253 | return -1; |
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254 | |
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255 | /* |
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256 | * Start network daemon |
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257 | */ |
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258 | networkDaemonTid = rtems_bsdnet_newproc ("ntwk", 4096, networkDaemon, NULL); |
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259 | |
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260 | /* |
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261 | * Let other network tasks begin |
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262 | */ |
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263 | rtems_bsdnet_semaphore_release (); |
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264 | return 0; |
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265 | } |
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266 | |
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267 | /* |
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268 | * Obtain network mutex |
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269 | */ |
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270 | void |
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271 | rtems_bsdnet_semaphore_obtain (void) |
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272 | { |
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273 | rtems_status_code sc; |
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274 | |
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275 | sc = rtems_semaphore_obtain (networkSemaphore, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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276 | if (sc != RTEMS_SUCCESSFUL) |
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277 | rtems_panic ("Can't obtain network semaphore: `%s'\n", rtems_status_text (sc)); |
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278 | } |
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279 | |
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280 | /* |
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281 | * Release network mutex |
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282 | */ |
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283 | void |
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284 | rtems_bsdnet_semaphore_release (void) |
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285 | { |
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286 | rtems_status_code sc; |
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287 | |
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288 | sc = rtems_semaphore_release (networkSemaphore); |
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289 | if (sc != RTEMS_SUCCESSFUL) |
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290 | rtems_panic ("Can't release network semaphore: `%s'\n", rtems_status_text (sc)); |
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291 | } |
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292 | |
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293 | /* |
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294 | * Wait for something to happen to a socket buffer |
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295 | */ |
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296 | int |
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297 | sbwait(sb) |
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298 | struct sockbuf *sb; |
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299 | { |
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300 | rtems_event_set events; |
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301 | rtems_id tid; |
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302 | rtems_status_code sc; |
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303 | |
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304 | /* |
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305 | * Soak up any pending events. |
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306 | * The sleep/wakeup synchronization in the FreeBSD |
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307 | * kernel has no memory. |
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308 | */ |
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309 | rtems_event_receive (SBWAIT_EVENT, RTEMS_EVENT_ANY | RTEMS_NO_WAIT, RTEMS_NO_TIMEOUT, &events); |
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310 | |
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311 | /* |
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312 | * Set this task as the target of the wakeup operation. |
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313 | */ |
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314 | rtems_task_ident (RTEMS_SELF, 0, &tid); |
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315 | sb->sb_sel.si_pid = tid; |
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316 | |
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317 | /* |
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318 | * Show that socket is waiting |
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319 | */ |
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320 | sb->sb_flags |= SB_WAIT; |
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321 | |
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322 | /* |
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323 | * Release the network semaphore. |
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324 | */ |
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325 | rtems_bsdnet_semaphore_release (); |
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326 | |
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327 | /* |
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328 | * Wait for the wakeup event. |
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329 | */ |
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330 | sc = rtems_event_receive (SBWAIT_EVENT, RTEMS_EVENT_ANY | RTEMS_WAIT, sb->sb_timeo, &events); |
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331 | |
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332 | /* |
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333 | * Reobtain the network semaphore. |
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334 | */ |
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335 | rtems_bsdnet_semaphore_obtain (); |
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336 | |
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337 | /* |
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338 | * Return the status of the wait. |
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339 | */ |
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340 | switch (sc) { |
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341 | case RTEMS_SUCCESSFUL: return 0; |
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342 | case RTEMS_TIMEOUT: return EWOULDBLOCK; |
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343 | default: return ENXIO; |
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344 | } |
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345 | } |
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346 | |
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347 | |
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348 | /* |
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349 | * Wake up the task waiting on a socket buffer. |
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350 | */ |
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351 | void |
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352 | sowakeup(so, sb) |
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353 | register struct socket *so; |
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354 | register struct sockbuf *sb; |
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355 | { |
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356 | if (sb->sb_flags & SB_WAIT) { |
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357 | sb->sb_flags &= ~SB_WAIT; |
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358 | rtems_event_send (sb->sb_sel.si_pid, SBWAIT_EVENT); |
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359 | } |
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360 | if (sb->sb_wakeup) { |
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361 | (*sb->sb_wakeup) (so, sb->sb_wakeuparg); |
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362 | } |
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363 | } |
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364 | |
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365 | /* |
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366 | * For now, a socket can be used by only one task at a time. |
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367 | */ |
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368 | int |
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369 | sb_lock(sb) |
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370 | register struct sockbuf *sb; |
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371 | { |
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372 | rtems_panic ("Socket buffer is already in use."); |
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373 | return 0; |
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374 | } |
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375 | void |
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376 | wakeup (void *p) |
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377 | { |
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378 | rtems_panic ("Wakeup called"); |
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379 | } |
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380 | |
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381 | /* |
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382 | * Wait for a connection/disconnection event. |
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383 | */ |
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384 | int |
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385 | soconnsleep (struct socket *so) |
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386 | { |
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387 | rtems_event_set events; |
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388 | rtems_id tid; |
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389 | rtems_status_code sc; |
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390 | |
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391 | /* |
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392 | * Soak up any pending events. |
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393 | * The sleep/wakeup synchronization in the FreeBSD |
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394 | * kernel has no memory. |
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395 | */ |
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396 | rtems_event_receive (SOSLEEP_EVENT, RTEMS_EVENT_ANY | RTEMS_NO_WAIT, RTEMS_NO_TIMEOUT, &events); |
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397 | |
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398 | /* |
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399 | * Set this task as the target of the wakeup operation. |
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400 | */ |
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401 | if (so->so_pgid) |
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402 | rtems_panic ("Another task is already sleeping on that socket"); |
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403 | rtems_task_ident (RTEMS_SELF, 0, &tid); |
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404 | so->so_pgid = tid; |
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405 | |
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406 | /* |
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407 | * Wait for the wakeup event. |
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408 | */ |
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409 | sc = rtems_bsdnet_event_receive (SOSLEEP_EVENT, RTEMS_EVENT_ANY | RTEMS_WAIT, so->so_rcv.sb_timeo, &events); |
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410 | |
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411 | /* |
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412 | * Relinquish ownership of the socket. |
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413 | */ |
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414 | so->so_pgid = 0; |
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415 | |
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416 | switch (sc) { |
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417 | case RTEMS_SUCCESSFUL: return 0; |
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418 | case RTEMS_TIMEOUT: return EWOULDBLOCK; |
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419 | default: return ENXIO; |
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420 | } |
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421 | } |
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422 | |
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423 | /* |
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424 | * Wake up a task waiting for a connection/disconnection to complete. |
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425 | */ |
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426 | void |
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427 | soconnwakeup (struct socket *so) |
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428 | { |
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429 | if (so->so_pgid) |
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430 | rtems_event_send (so->so_pgid, SOSLEEP_EVENT); |
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431 | } |
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432 | |
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433 | /* |
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434 | * Send an event to the network daemon. |
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435 | * This corresponds to sending a software interrupt in the BSD kernel. |
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436 | */ |
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437 | void |
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438 | rtems_bsdnet_schednetisr (int n) |
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439 | { |
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440 | rtems_event_send (networkDaemonTid, 1 << n); |
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441 | } |
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442 | |
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443 | /* |
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444 | * The network daemon |
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445 | * This provides a context to run BSD software interrupts |
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446 | */ |
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447 | static void |
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448 | networkDaemon (void *task_argument) |
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449 | { |
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450 | rtems_event_set events; |
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451 | rtems_interval now; |
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452 | int ticksPassed; |
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453 | unsigned32 timeout; |
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454 | struct callout *c; |
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455 | |
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456 | for (;;) { |
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457 | c = calltodo.c_next; |
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458 | if (c) |
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459 | timeout = c->c_time; |
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460 | else |
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461 | timeout = RTEMS_NO_TIMEOUT; |
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462 | rtems_bsdnet_event_receive (NETISR_EVENTS, |
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463 | RTEMS_EVENT_ANY | RTEMS_WAIT, |
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464 | timeout, |
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465 | &events); |
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466 | if (events & NETISR_IP_EVENT) |
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467 | ipintr (); |
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468 | if (events & NETISR_ARP_EVENT) |
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469 | arpintr (); |
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470 | rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &now); |
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471 | ticksPassed = now - ticksWhenCalloutsLastChecked; |
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472 | if (ticksPassed != 0) { |
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473 | ticksWhenCalloutsLastChecked = now; |
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474 | |
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475 | c = calltodo.c_next; |
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476 | if (c) { |
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477 | c->c_time -= ticksPassed; |
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478 | while ((c = calltodo.c_next) != NULL && c->c_time <= 0) { |
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479 | void *arg; |
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480 | void (*func) (void *); |
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481 | |
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482 | func = c->c_func; |
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483 | arg = c->c_arg; |
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484 | calltodo.c_next = c->c_next; |
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485 | c->c_next = callfree; |
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486 | callfree = c; |
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487 | (*func)(arg); |
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488 | } |
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489 | } |
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490 | } |
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491 | } |
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492 | } |
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493 | |
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494 | /* |
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495 | * Structure passed to task-start stub |
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496 | */ |
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497 | struct newtask { |
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498 | void (*entry)(void *); |
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499 | void *arg; |
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500 | }; |
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501 | |
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502 | /* |
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503 | * Task-start stub |
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504 | */ |
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505 | static void |
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506 | taskEntry (rtems_task_argument arg) |
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507 | { |
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508 | struct newtask t; |
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509 | |
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510 | /* |
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511 | * Pick up task information and free |
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512 | * the memory allocated to pass the |
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513 | * information to this task. |
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514 | */ |
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515 | t = *(struct newtask *)arg; |
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516 | free ((struct newtask *)arg); |
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517 | |
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518 | /* |
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519 | * Enter the competition for the network semaphore |
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520 | */ |
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521 | rtems_bsdnet_semaphore_obtain (); |
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522 | |
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523 | /* |
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524 | * Enter the task |
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525 | */ |
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526 | (*t.entry)(t.arg); |
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527 | rtems_panic ("Network task returned!\n"); |
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528 | } |
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529 | |
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530 | /* |
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531 | * Start a network task |
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532 | */ |
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533 | rtems_id |
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534 | rtems_bsdnet_newproc (char *name, int stacksize, void(*entry)(void *), void *arg) |
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535 | { |
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536 | struct newtask *t; |
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537 | char nm[4]; |
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538 | rtems_id tid; |
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539 | rtems_status_code sc; |
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540 | |
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541 | strncpy (nm, name, 4); |
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542 | sc = rtems_task_create (rtems_build_name(nm[0], nm[1], nm[2], nm[3]), |
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543 | networkDaemonPriority, |
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544 | stacksize, |
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545 | RTEMS_PREEMPT|RTEMS_NO_TIMESLICE|RTEMS_NO_ASR|RTEMS_INTERRUPT_LEVEL(0), |
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546 | RTEMS_NO_FLOATING_POINT|RTEMS_LOCAL, |
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547 | &tid); |
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548 | if (sc != RTEMS_SUCCESSFUL) |
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549 | rtems_panic ("Can't create network daemon `%s': `%s'\n", name, rtems_status_text (sc)); |
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550 | |
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551 | /* |
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552 | * Set up task arguments |
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553 | */ |
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554 | t = malloc (sizeof *t); |
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555 | t->entry = entry; |
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556 | t->arg = arg; |
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557 | |
---|
558 | /* |
---|
559 | * Start the task |
---|
560 | */ |
---|
561 | sc = rtems_task_start (tid, taskEntry, (rtems_task_argument)t); |
---|
562 | if (sc != RTEMS_SUCCESSFUL) |
---|
563 | rtems_panic ("Can't start network daemon `%s': `%s'\n", name, rtems_status_text (sc)); |
---|
564 | |
---|
565 | /* |
---|
566 | * Let our caller know the i.d. of the new task |
---|
567 | */ |
---|
568 | return tid; |
---|
569 | } |
---|
570 | |
---|
571 | rtems_status_code rtems_bsdnet_event_receive ( |
---|
572 | rtems_event_set event_in, |
---|
573 | rtems_option option_set, |
---|
574 | rtems_interval ticks, |
---|
575 | rtems_event_set *event_out) |
---|
576 | { |
---|
577 | rtems_status_code sc; |
---|
578 | |
---|
579 | rtems_bsdnet_semaphore_release (); |
---|
580 | sc = rtems_event_receive (event_in, option_set, ticks, event_out); |
---|
581 | rtems_bsdnet_semaphore_obtain (); |
---|
582 | return sc; |
---|
583 | } |
---|
584 | |
---|
585 | /* |
---|
586 | * Return time since startup |
---|
587 | */ |
---|
588 | void |
---|
589 | microtime (struct timeval *t) |
---|
590 | { |
---|
591 | rtems_interval now; |
---|
592 | |
---|
593 | rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &now); |
---|
594 | t->tv_sec = now / rtems_bsdnet_ticks_per_second; |
---|
595 | t->tv_usec = (now % rtems_bsdnet_ticks_per_second) * rtems_bsdnet_microseconds_per_tick; |
---|
596 | } |
---|
597 | |
---|
598 | unsigned long |
---|
599 | rtems_bsdnet_seconds_since_boot (void) |
---|
600 | { |
---|
601 | rtems_interval now; |
---|
602 | |
---|
603 | rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &now); |
---|
604 | return now / rtems_bsdnet_ticks_per_second; |
---|
605 | } |
---|
606 | |
---|
607 | /* |
---|
608 | * Fake random number generator |
---|
609 | */ |
---|
610 | unsigned long |
---|
611 | rtems_bsdnet_random (void) |
---|
612 | { |
---|
613 | rtems_interval now; |
---|
614 | |
---|
615 | rtems_clock_get (RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &now); |
---|
616 | return (now * 99991); |
---|
617 | } |
---|
618 | |
---|
619 | /* |
---|
620 | * Callout list processing |
---|
621 | */ |
---|
622 | void |
---|
623 | timeout(void (*ftn)(void *), void *arg, int ticks) |
---|
624 | { |
---|
625 | register struct callout *new, *p, *t; |
---|
626 | |
---|
627 | if (ticks <= 0) |
---|
628 | ticks = 1; |
---|
629 | |
---|
630 | /* Fill in the next free callout structure. */ |
---|
631 | if (callfree == NULL) { |
---|
632 | callfree = malloc (sizeof *callfree); |
---|
633 | if (callfree == NULL) |
---|
634 | rtems_panic ("No memory for timeout table entry"); |
---|
635 | callfree->c_next = NULL; |
---|
636 | } |
---|
637 | |
---|
638 | new = callfree; |
---|
639 | callfree = new->c_next; |
---|
640 | new->c_arg = arg; |
---|
641 | new->c_func = ftn; |
---|
642 | |
---|
643 | /* |
---|
644 | * The time for each event is stored as a difference from the time |
---|
645 | * of the previous event on the queue. Walk the queue, correcting |
---|
646 | * the ticks argument for queue entries passed. Correct the ticks |
---|
647 | * value for the queue entry immediately after the insertion point |
---|
648 | * as well. Watch out for negative c_time values; these represent |
---|
649 | * overdue events. |
---|
650 | */ |
---|
651 | for (p = &calltodo; |
---|
652 | (t = p->c_next) != NULL && ticks > t->c_time; p = t) |
---|
653 | if (t->c_time > 0) |
---|
654 | ticks -= t->c_time; |
---|
655 | new->c_time = ticks; |
---|
656 | if (t != NULL) |
---|
657 | t->c_time -= ticks; |
---|
658 | |
---|
659 | /* Insert the new entry into the queue. */ |
---|
660 | p->c_next = new; |
---|
661 | new->c_next = t; |
---|
662 | } |
---|
663 | |
---|
664 | /* |
---|
665 | * Ticks till specified time |
---|
666 | * XXX: This version worries only about seconds, but that's good |
---|
667 | * enough for the way the network code uses this routine. |
---|
668 | */ |
---|
669 | int |
---|
670 | hzto(struct timeval *tv) |
---|
671 | { |
---|
672 | long diff = tv->tv_sec - rtems_bsdnet_seconds_since_boot(); |
---|
673 | |
---|
674 | if (diff <= 0) |
---|
675 | return 1; |
---|
676 | return diff * rtems_bsdnet_ticks_per_second; |
---|
677 | } |
---|
678 | |
---|
679 | /* |
---|
680 | * Kernel debugging |
---|
681 | */ |
---|
682 | int rtems_bsdnet_log_priority; |
---|
683 | void |
---|
684 | rtems_bsdnet_log (int priority, const char *fmt, ...) |
---|
685 | { |
---|
686 | va_list args; |
---|
687 | |
---|
688 | if (priority & rtems_bsdnet_log_priority) { |
---|
689 | va_start (args, fmt); |
---|
690 | vprintf (fmt, args); |
---|
691 | va_end (args); |
---|
692 | } |
---|
693 | } |
---|
694 | |
---|
695 | /* |
---|
696 | * IP header checksum routine for processors which don't have an inline version |
---|
697 | */ |
---|
698 | u_int |
---|
699 | in_cksum_hdr (const void *ip) |
---|
700 | { |
---|
701 | rtems_unsigned32 sum; |
---|
702 | const rtems_unsigned16 *sp; |
---|
703 | int i; |
---|
704 | |
---|
705 | sum = 0; |
---|
706 | sp = (rtems_unsigned16 *)ip; |
---|
707 | for (i = 0 ; i < 10 ; i++) |
---|
708 | sum += *sp++; |
---|
709 | while (sum > 0xFFFF) |
---|
710 | sum = (sum & 0xffff) + (sum >> 16); |
---|
711 | return ~sum & 0xFFFF; |
---|
712 | } |
---|
713 | |
---|
714 | /* |
---|
715 | * Manipulate routing tables |
---|
716 | */ |
---|
717 | int rtems_bsdnet_rtrequest ( |
---|
718 | int req, |
---|
719 | struct sockaddr *dst, |
---|
720 | struct sockaddr *gateway, |
---|
721 | struct sockaddr *netmask, |
---|
722 | int flags, |
---|
723 | struct rtentry **net_nrt) |
---|
724 | { |
---|
725 | int error; |
---|
726 | |
---|
727 | rtems_bsdnet_semaphore_obtain (); |
---|
728 | error = rtrequest (req, dst, gateway, netmask, flags, net_nrt); |
---|
729 | rtems_bsdnet_semaphore_release (); |
---|
730 | if (error) { |
---|
731 | errno = error; |
---|
732 | return -1; |
---|
733 | } |
---|
734 | return 0; |
---|
735 | } |
---|
736 | |
---|
737 | static int |
---|
738 | rtems_bsdnet_setup (void) |
---|
739 | { |
---|
740 | struct rtems_bsdnet_ifconfig *ifp; |
---|
741 | int s; |
---|
742 | struct ifreq ifreq; |
---|
743 | struct sockaddr_in address; |
---|
744 | struct sockaddr_in netmask; |
---|
745 | struct sockaddr_in broadcast; |
---|
746 | struct sockaddr_in gateway; |
---|
747 | int i; |
---|
748 | extern char *strdup (const char *cp); |
---|
749 | |
---|
750 | /* |
---|
751 | * Set local parameters |
---|
752 | */ |
---|
753 | if (rtems_bsdnet_config.hostname) |
---|
754 | sethostname (rtems_bsdnet_config.hostname, |
---|
755 | strlen (rtems_bsdnet_config.hostname)); |
---|
756 | if (rtems_bsdnet_config.domainname) |
---|
757 | rtems_bsdnet_domain_name = |
---|
758 | strdup (rtems_bsdnet_config.domainname); |
---|
759 | if (rtems_bsdnet_config.log_host) |
---|
760 | rtems_bsdnet_log_host_address.s_addr = |
---|
761 | inet_addr (rtems_bsdnet_config.log_host); |
---|
762 | for (i = 0 ; i < sizeof rtems_bsdnet_config.name_server / |
---|
763 | sizeof rtems_bsdnet_config.name_server[0] ; i++) { |
---|
764 | if (!rtems_bsdnet_config.name_server[i]) |
---|
765 | break; |
---|
766 | rtems_bsdnet_nameserver[rtems_bsdnet_nameserver_count++].s_addr |
---|
767 | = inet_addr (rtems_bsdnet_config.name_server[i]); |
---|
768 | } |
---|
769 | for (i = 0 ; i < sizeof rtems_bsdnet_config.ntp_server / |
---|
770 | sizeof rtems_bsdnet_config.ntp_server[0] ; i++) { |
---|
771 | if (!rtems_bsdnet_config.ntp_server[i]) |
---|
772 | break; |
---|
773 | rtems_bsdnet_ntpserver[rtems_bsdnet_ntpserver_count++].s_addr |
---|
774 | = inet_addr (rtems_bsdnet_config.ntp_server[i]); |
---|
775 | } |
---|
776 | |
---|
777 | /* |
---|
778 | * Configure interfaces |
---|
779 | */ |
---|
780 | s = socket (AF_INET, SOCK_DGRAM, 0); |
---|
781 | if (s < 0) { |
---|
782 | printf ("Can't create initial socket: %s\n", strerror (errno)); |
---|
783 | return -1; |
---|
784 | } |
---|
785 | for (ifp = rtems_bsdnet_config.ifconfig ; ifp ; ifp = ifp->next) { |
---|
786 | if (ifp->ip_address == NULL) |
---|
787 | continue; |
---|
788 | |
---|
789 | /* |
---|
790 | * Get the interface flags |
---|
791 | */ |
---|
792 | strcpy (ifreq.ifr_name, ifp->name); |
---|
793 | if (ioctl (s, SIOCGIFFLAGS, &ifreq) < 0) { |
---|
794 | printf ("Can't get %s flags: %s\n", ifp->name, strerror (errno)); |
---|
795 | return -1; |
---|
796 | } |
---|
797 | |
---|
798 | /* |
---|
799 | * Bring interface up |
---|
800 | */ |
---|
801 | ifreq.ifr_flags |= IFF_UP; |
---|
802 | if (ioctl (s, SIOCSIFFLAGS, &ifreq) < 0) { |
---|
803 | printf ("Can't bring %s up: %s\n", ifp->name, strerror (errno)); |
---|
804 | return -1; |
---|
805 | } |
---|
806 | |
---|
807 | /* |
---|
808 | * Set interface netmask |
---|
809 | */ |
---|
810 | memset (&netmask, '\0', sizeof netmask); |
---|
811 | netmask.sin_len = sizeof netmask; |
---|
812 | netmask.sin_family = AF_INET; |
---|
813 | netmask.sin_addr.s_addr = inet_addr (ifp->ip_netmask); |
---|
814 | memcpy (&ifreq.ifr_addr, &netmask, sizeof netmask); |
---|
815 | if (ioctl (s, SIOCSIFNETMASK, &ifreq) < 0) { |
---|
816 | printf ("Can't set %s netmask: %s\n", ifp->name, strerror (errno)); |
---|
817 | return -1; |
---|
818 | } |
---|
819 | |
---|
820 | /* |
---|
821 | * Set interface address |
---|
822 | */ |
---|
823 | memset (&address, '\0', sizeof address); |
---|
824 | address.sin_len = sizeof address; |
---|
825 | address.sin_family = AF_INET; |
---|
826 | address.sin_addr.s_addr = inet_addr (ifp->ip_address); |
---|
827 | memcpy (&ifreq.ifr_addr, &address, sizeof address); |
---|
828 | if (ioctl (s, SIOCSIFADDR, &ifreq) < 0) { |
---|
829 | printf ("Can't set %s address: %s\n", ifp->name, strerror (errno)); |
---|
830 | return -1; |
---|
831 | } |
---|
832 | |
---|
833 | /* |
---|
834 | * Set interface broadcast address |
---|
835 | */ |
---|
836 | memset (&broadcast, '\0', sizeof broadcast); |
---|
837 | broadcast.sin_len = sizeof broadcast; |
---|
838 | broadcast.sin_family = AF_INET; |
---|
839 | broadcast.sin_addr.s_addr = address.sin_addr.s_addr | ~netmask.sin_addr.s_addr; |
---|
840 | memcpy (&ifreq.ifr_broadaddr, &broadcast, sizeof broadcast); |
---|
841 | if (ioctl (s, SIOCSIFBRDADDR, &ifreq) < 0) |
---|
842 | printf ("Can't set %s broadcast address: %s\n", ifp->name, strerror (errno)); |
---|
843 | } |
---|
844 | |
---|
845 | /* |
---|
846 | * We're done with the dummy socket |
---|
847 | */ |
---|
848 | close (s); |
---|
849 | |
---|
850 | /* |
---|
851 | * Set default route |
---|
852 | */ |
---|
853 | if (rtems_bsdnet_config.gateway) { |
---|
854 | address.sin_addr.s_addr = INADDR_ANY; |
---|
855 | netmask.sin_addr.s_addr = INADDR_ANY; |
---|
856 | memset (&gateway, '\0', sizeof gateway); |
---|
857 | gateway.sin_len = sizeof gateway; |
---|
858 | gateway.sin_family = AF_INET; |
---|
859 | gateway.sin_addr.s_addr = inet_addr (rtems_bsdnet_config.gateway); |
---|
860 | if (rtems_bsdnet_rtrequest ( |
---|
861 | RTM_ADD, |
---|
862 | (struct sockaddr *)&address, |
---|
863 | (struct sockaddr *)&gateway, |
---|
864 | (struct sockaddr *)&netmask, |
---|
865 | (RTF_UP | RTF_GATEWAY | RTF_STATIC), NULL) < 0) { |
---|
866 | printf ("Can't set default route: %s\n", strerror (errno)); |
---|
867 | return -1; |
---|
868 | } |
---|
869 | } |
---|
870 | return 0; |
---|
871 | } |
---|
872 | |
---|
873 | /* |
---|
874 | * Initialize the network |
---|
875 | */ |
---|
876 | int |
---|
877 | rtems_bsdnet_initialize_network (void) |
---|
878 | { |
---|
879 | struct rtems_bsdnet_ifconfig *ifp; |
---|
880 | |
---|
881 | /* |
---|
882 | * Start network tasks. |
---|
883 | * Initialize BSD network data structures. |
---|
884 | */ |
---|
885 | if (rtems_bsdnet_initialize () < 0) |
---|
886 | return -1; |
---|
887 | |
---|
888 | /* |
---|
889 | * Attach interfaces |
---|
890 | */ |
---|
891 | for (ifp = rtems_bsdnet_config.ifconfig ; ifp ; ifp = ifp->next) { |
---|
892 | rtems_bsdnet_semaphore_obtain (); |
---|
893 | (ifp->attach)(ifp); |
---|
894 | rtems_bsdnet_semaphore_release (); |
---|
895 | } |
---|
896 | |
---|
897 | /* |
---|
898 | * Bring up the network |
---|
899 | */ |
---|
900 | if (rtems_bsdnet_setup () < 0) |
---|
901 | return -1; |
---|
902 | if (rtems_bsdnet_config.bootp) |
---|
903 | (*rtems_bsdnet_config.bootp)(); |
---|
904 | return 0; |
---|
905 | } |
---|
906 | |
---|
907 | /* |
---|
908 | * Parse a network driver name into a name and a unit number |
---|
909 | */ |
---|
910 | int |
---|
911 | rtems_bsdnet_parse_driver_name (const struct rtems_bsdnet_ifconfig *config, char **namep) |
---|
912 | { |
---|
913 | const char *cp = config->name; |
---|
914 | char c; |
---|
915 | int unitNumber = 0; |
---|
916 | |
---|
917 | if (cp == NULL) { |
---|
918 | printf ("No network driver name.\n"); |
---|
919 | return -1; |
---|
920 | } |
---|
921 | while ((c = *cp++) != '\0') { |
---|
922 | if ((c >= '0') && (c <= '9')) { |
---|
923 | int len = cp - config->name; |
---|
924 | if ((len < 2) || (len > 50)) |
---|
925 | break; |
---|
926 | for (;;) { |
---|
927 | unitNumber = (unitNumber * 10) + (c - '0'); |
---|
928 | c = *cp++; |
---|
929 | if (c == '\0') { |
---|
930 | char *unitName = malloc (len); |
---|
931 | if (unitName == NULL) { |
---|
932 | printf ("No memory.\n"); |
---|
933 | return -1; |
---|
934 | } |
---|
935 | strncpy (unitName, config->name, len - 1); |
---|
936 | unitName[len-1] = '\0'; |
---|
937 | *namep = unitName; |
---|
938 | return unitNumber; |
---|
939 | } |
---|
940 | if ((c < '0') || (c > '9')) |
---|
941 | break; |
---|
942 | } |
---|
943 | break; |
---|
944 | } |
---|
945 | } |
---|
946 | printf ("Bad network driver name `%s'.\n", config->name); |
---|
947 | return -1; |
---|
948 | } |
---|
949 | |
---|
950 | /* |
---|
951 | * Handle requests for more network memory |
---|
952 | * XXX: Another possibility would be to use a semaphore here with |
---|
953 | * a release in the mbuf free macro. I have chosen this `polling' |
---|
954 | * approach because: |
---|
955 | * 1) It is simpler. |
---|
956 | * 2) It adds no complexity to the free macro. |
---|
957 | * 3) Running out of mbufs should be a rare |
---|
958 | * condition -- predeployment testing of |
---|
959 | * an application should indicate the |
---|
960 | * required mbuf pool size. |
---|
961 | * XXX: Should there be a panic if a task is stuck in the loop for |
---|
962 | * more than a minute or so? |
---|
963 | */ |
---|
964 | int |
---|
965 | m_mballoc (int nmb, int nowait) |
---|
966 | { |
---|
967 | if (nowait) |
---|
968 | return 0; |
---|
969 | m_reclaim (); |
---|
970 | if (mmbfree == NULL) { |
---|
971 | int try = 0; |
---|
972 | int print_limit = 30 * rtems_bsdnet_ticks_per_second; |
---|
973 | |
---|
974 | mbstat.m_wait++; |
---|
975 | for (;;) { |
---|
976 | rtems_bsdnet_semaphore_release (); |
---|
977 | rtems_task_wake_after (1); |
---|
978 | rtems_bsdnet_semaphore_obtain (); |
---|
979 | if (mmbfree) |
---|
980 | break; |
---|
981 | if (++try >= print_limit) { |
---|
982 | printf ("Still waiting for mbuf.\n"); |
---|
983 | try = 0; |
---|
984 | } |
---|
985 | } |
---|
986 | } |
---|
987 | else { |
---|
988 | mbstat.m_drops++; |
---|
989 | } |
---|
990 | return 1; |
---|
991 | } |
---|
992 | |
---|
993 | int |
---|
994 | m_clalloc(ncl, nowait) |
---|
995 | { |
---|
996 | if (nowait) |
---|
997 | return 0; |
---|
998 | m_reclaim (); |
---|
999 | if (mclfree == NULL) { |
---|
1000 | int try = 0; |
---|
1001 | int print_limit = 30 * rtems_bsdnet_ticks_per_second; |
---|
1002 | |
---|
1003 | mbstat.m_wait++; |
---|
1004 | for (;;) { |
---|
1005 | rtems_bsdnet_semaphore_release (); |
---|
1006 | rtems_task_wake_after (1); |
---|
1007 | rtems_bsdnet_semaphore_obtain (); |
---|
1008 | if (mclfree) |
---|
1009 | break; |
---|
1010 | if (++try >= print_limit) { |
---|
1011 | printf ("Still waiting for mbuf cluster.\n"); |
---|
1012 | try = 0; |
---|
1013 | } |
---|
1014 | } |
---|
1015 | } |
---|
1016 | else { |
---|
1017 | mbstat.m_drops++; |
---|
1018 | } |
---|
1019 | return 1; |
---|
1020 | } |
---|