1 | /*
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2 | * Copyright (c) 2012 Jiri Svoboda
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3 | * 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 | *
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9 | * - Redistributions of source code must retain the above copyright
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10 | * notice, this list of conditions and the following disclaimer.
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11 | * - Redistributions in binary form must reproduce the above copyright
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12 | * notice, this list of conditions and the following disclaimer in the
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13 | * documentation and/or other materials provided with the distribution.
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14 | * - The name of the author may not be used to endorse or promote products
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15 | * derived from this software without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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27 | */
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28 |
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29 | /** @addtogroup inet
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30 | * @{
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31 | */
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32 | /**
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33 | * @file
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34 | * @brief
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35 | */
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36 |
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37 | #include <stdbool.h>
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38 | #include <errno.h>
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39 | #include <fibril_synch.h>
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40 | #include <inet/iplink.h>
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41 | #include <io/log.h>
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42 | #include <loc.h>
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43 | #include <stdlib.h>
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44 | #include <str.h>
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45 | #include <net/socket_codes.h>
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46 | #include "addrobj.h"
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47 | #include "inetsrv.h"
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48 | #include "inet_link.h"
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49 | #include "pdu.h"
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50 |
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51 | static bool first_link = true;
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52 | static bool first_link6 = true;
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53 |
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54 | static FIBRIL_MUTEX_INITIALIZE(ip_ident_lock);
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55 | static uint16_t ip_ident = 0;
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56 |
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57 | static int inet_iplink_recv(iplink_t *, iplink_recv_sdu_t *, uint16_t);
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58 | static inet_link_t *inet_link_get_by_id_locked(sysarg_t);
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59 |
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60 | static iplink_ev_ops_t inet_iplink_ev_ops = {
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61 | .recv = inet_iplink_recv
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62 | };
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63 |
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64 | static LIST_INITIALIZE(inet_links);
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65 | static FIBRIL_MUTEX_INITIALIZE(inet_links_lock);
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66 |
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67 | static addr128_t link_local_node_ip =
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68 | {0xfe, 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xfe, 0, 0, 0};
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69 |
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70 | static void inet_link_local_node_ip(addr48_t mac_addr,
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71 | addr128_t ip_addr)
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72 | {
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73 | memcpy(ip_addr, link_local_node_ip, 16);
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74 |
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75 | ip_addr[8] = mac_addr[0] ^ 0x02;
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76 | ip_addr[9] = mac_addr[1];
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77 | ip_addr[10] = mac_addr[2];
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78 | ip_addr[13] = mac_addr[3];
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79 | ip_addr[14] = mac_addr[4];
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80 | ip_addr[15] = mac_addr[5];
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81 | }
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82 |
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83 | static int inet_iplink_recv(iplink_t *iplink, iplink_recv_sdu_t *sdu, uint16_t af)
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84 | {
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85 | log_msg(LOG_DEFAULT, LVL_DEBUG, "inet_iplink_recv()");
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86 |
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87 | int rc;
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88 | inet_packet_t packet;
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89 |
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90 | switch (af) {
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91 | case AF_INET:
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92 | rc = inet_pdu_decode(sdu->data, sdu->size, &packet);
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93 | break;
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94 | case AF_INET6:
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95 | rc = inet_pdu_decode6(sdu->data, sdu->size, &packet);
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96 | break;
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97 | default:
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98 | log_msg(LOG_DEFAULT, LVL_DEBUG, "invalid address family");
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99 | return EINVAL;
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100 | }
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101 |
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102 | if (rc != EOK) {
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103 | log_msg(LOG_DEFAULT, LVL_DEBUG, "failed decoding PDU");
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104 | return rc;
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105 | }
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106 |
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107 | log_msg(LOG_DEFAULT, LVL_DEBUG, "call inet_recv_packet()");
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108 | rc = inet_recv_packet(&packet);
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109 | log_msg(LOG_DEFAULT, LVL_DEBUG, "call inet_recv_packet -> %d", rc);
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110 | free(packet.data);
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111 |
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112 | return rc;
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113 | }
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114 |
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115 | static inet_link_t *inet_link_new(void)
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116 | {
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117 | inet_link_t *ilink = calloc(1, sizeof(inet_link_t));
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118 |
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119 | if (ilink == NULL) {
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120 | log_msg(LOG_DEFAULT, LVL_ERROR, "Failed allocating link structure. "
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121 | "Out of memory.");
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122 | return NULL;
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123 | }
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124 |
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125 | link_initialize(&ilink->link_list);
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126 |
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127 | return ilink;
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128 | }
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129 |
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130 | static void inet_link_delete(inet_link_t *ilink)
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131 | {
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132 | if (ilink->svc_name != NULL)
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133 | free(ilink->svc_name);
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134 |
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135 | free(ilink);
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136 | }
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137 |
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138 | int inet_link_open(service_id_t sid)
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139 | {
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140 | inet_link_t *ilink;
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141 | inet_addr_t iaddr;
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142 | int rc;
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143 |
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144 | log_msg(LOG_DEFAULT, LVL_DEBUG, "inet_link_open()");
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145 | ilink = inet_link_new();
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146 | if (ilink == NULL)
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147 | return ENOMEM;
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148 |
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149 | ilink->svc_id = sid;
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150 | ilink->iplink = NULL;
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151 |
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152 | rc = loc_service_get_name(sid, &ilink->svc_name);
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153 | if (rc != EOK) {
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154 | log_msg(LOG_DEFAULT, LVL_ERROR, "Failed getting service name.");
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155 | goto error;
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156 | }
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157 |
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158 | ilink->sess = loc_service_connect(EXCHANGE_SERIALIZE, sid, 0);
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159 | if (ilink->sess == NULL) {
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160 | log_msg(LOG_DEFAULT, LVL_ERROR, "Failed connecting '%s'", ilink->svc_name);
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161 | goto error;
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162 | }
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163 |
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164 | rc = iplink_open(ilink->sess, &inet_iplink_ev_ops, &ilink->iplink);
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165 | if (rc != EOK) {
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166 | log_msg(LOG_DEFAULT, LVL_ERROR, "Failed opening IP link '%s'",
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167 | ilink->svc_name);
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168 | goto error;
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169 | }
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170 |
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171 | rc = iplink_get_mtu(ilink->iplink, &ilink->def_mtu);
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172 | if (rc != EOK) {
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173 | log_msg(LOG_DEFAULT, LVL_ERROR, "Failed determinning MTU of link '%s'",
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174 | ilink->svc_name);
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175 | goto error;
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176 | }
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177 |
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178 | /*
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179 | * Get the MAC address of the link. If the link has a MAC
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180 | * address, we assume that it supports NDP.
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181 | */
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182 | rc = iplink_get_mac48(ilink->iplink, &ilink->mac);
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183 | ilink->mac_valid = (rc == EOK);
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184 |
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185 | log_msg(LOG_DEFAULT, LVL_DEBUG, "Opened IP link '%s'", ilink->svc_name);
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186 |
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187 | fibril_mutex_lock(&inet_links_lock);
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188 |
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189 | if (inet_link_get_by_id_locked(sid) != NULL) {
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190 | fibril_mutex_unlock(&inet_links_lock);
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191 | log_msg(LOG_DEFAULT, LVL_DEBUG, "Link %zu already open",
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192 | sid);
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193 | rc = EEXIST;
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194 | goto error;
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195 | }
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196 |
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197 | list_append(&ilink->link_list, &inet_links);
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198 | fibril_mutex_unlock(&inet_links_lock);
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199 |
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200 | inet_addrobj_t *addr = NULL;
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201 |
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202 | /* XXX FIXME Cannot rely on loopback being the first IP link service!! */
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203 | if (first_link) {
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204 | addr = inet_addrobj_new();
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205 |
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206 | inet_naddr(&addr->naddr, 127, 0, 0, 1, 24);
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207 | first_link = false;
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208 | }
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209 |
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210 | if (addr != NULL) {
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211 | addr->ilink = ilink;
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212 | addr->name = str_dup("v4a");
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213 |
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214 | rc = inet_addrobj_add(addr);
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215 | if (rc == EOK) {
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216 | inet_naddr_addr(&addr->naddr, &iaddr);
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217 | rc = iplink_addr_add(ilink->iplink, &iaddr);
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218 | if (rc != EOK) {
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219 | log_msg(LOG_DEFAULT, LVL_ERROR,
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220 | "Failed setting IPv4 address on internet link.");
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221 | inet_addrobj_remove(addr);
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222 | inet_addrobj_delete(addr);
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223 | }
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224 | } else {
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225 | log_msg(LOG_DEFAULT, LVL_ERROR, "Failed adding IPv4 address.");
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226 | inet_addrobj_delete(addr);
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227 | }
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228 | }
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229 |
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230 | inet_addrobj_t *addr6 = NULL;
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231 |
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232 | if (first_link6) {
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233 | addr6 = inet_addrobj_new();
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234 |
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235 | inet_naddr6(&addr6->naddr, 0, 0, 0, 0, 0, 0, 0, 1, 128);
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236 | first_link6 = false;
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237 | } else if (ilink->mac_valid) {
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238 | addr6 = inet_addrobj_new();
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239 |
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240 | addr128_t link_local;
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241 | inet_link_local_node_ip(ilink->mac, link_local);
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242 |
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243 | inet_naddr_set6(link_local, 64, &addr6->naddr);
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244 | }
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245 |
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246 | if (addr6 != NULL) {
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247 | addr6->ilink = ilink;
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248 | addr6->name = str_dup("v6a");
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249 |
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250 | rc = inet_addrobj_add(addr6);
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251 | if (rc == EOK) {
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252 | inet_naddr_addr(&addr6->naddr, &iaddr);
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253 | rc = iplink_addr_add(ilink->iplink, &iaddr);
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254 | if (rc != EOK) {
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255 | log_msg(LOG_DEFAULT, LVL_ERROR,
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256 | "Failed setting IPv6 address on internet link.");
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257 | inet_addrobj_remove(addr6);
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258 | inet_addrobj_delete(addr6);
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259 | }
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260 | } else {
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261 | log_msg(LOG_DEFAULT, LVL_ERROR, "Failed adding IPv6 address.");
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262 | inet_addrobj_delete(addr6);
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263 | }
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264 | }
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265 |
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266 | log_msg(LOG_DEFAULT, LVL_DEBUG, "Configured link '%s'.", ilink->svc_name);
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267 | return EOK;
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268 |
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269 | error:
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270 | if (ilink->iplink != NULL)
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271 | iplink_close(ilink->iplink);
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272 |
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273 | inet_link_delete(ilink);
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274 | return rc;
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275 | }
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276 |
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277 | /** Send IPv4 datagram over Internet link
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278 | *
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279 | * @param ilink Internet link
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280 | * @param lsrc Source IPv4 address
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281 | * @param ldest Destination IPv4 address
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282 | * @param dgram IPv4 datagram body
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283 | * @param proto Protocol
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284 | * @param ttl Time-to-live
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285 | * @param df Do-not-Fragment flag
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286 | *
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287 | * @return EOK on success
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288 | * @return ENOMEM when not enough memory to create the datagram
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289 | * @return ENOTSUP if networking mode is not supported
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290 | *
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291 | */
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292 | int inet_link_send_dgram(inet_link_t *ilink, addr32_t lsrc, addr32_t ldest,
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293 | inet_dgram_t *dgram, uint8_t proto, uint8_t ttl, int df)
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294 | {
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295 | addr32_t src_v4;
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296 | ip_ver_t src_ver = inet_addr_get(&dgram->src, &src_v4, NULL);
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297 | if (src_ver != ip_v4)
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298 | return EINVAL;
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299 |
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300 | addr32_t dest_v4;
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301 | ip_ver_t dest_ver = inet_addr_get(&dgram->dest, &dest_v4, NULL);
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302 | if (dest_ver != ip_v4)
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303 | return EINVAL;
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304 |
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305 | /*
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306 | * Fill packet structure. Fragmentation is performed by
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307 | * inet_pdu_encode().
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308 | */
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309 |
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310 | iplink_sdu_t sdu;
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311 |
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312 | sdu.src = lsrc;
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313 | sdu.dest = ldest;
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314 |
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315 | inet_packet_t packet;
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316 |
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317 | packet.src = dgram->src;
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318 | packet.dest = dgram->dest;
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319 | packet.tos = dgram->tos;
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320 | packet.proto = proto;
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321 | packet.ttl = ttl;
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322 |
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323 | /* Allocate identifier */
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324 | fibril_mutex_lock(&ip_ident_lock);
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325 | packet.ident = ++ip_ident;
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326 | fibril_mutex_unlock(&ip_ident_lock);
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327 |
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328 | packet.df = df;
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329 | packet.data = dgram->data;
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330 | packet.size = dgram->size;
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331 |
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332 | int rc;
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333 | size_t offs = 0;
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334 |
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335 | do {
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336 | /* Encode one fragment */
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337 |
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338 | size_t roffs;
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339 | rc = inet_pdu_encode(&packet, src_v4, dest_v4, offs, ilink->def_mtu,
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340 | &sdu.data, &sdu.size, &roffs);
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341 | if (rc != EOK)
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342 | return rc;
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343 |
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344 | /* Send the PDU */
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345 | rc = iplink_send(ilink->iplink, &sdu);
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346 |
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347 | free(sdu.data);
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348 | offs = roffs;
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349 | } while (offs < packet.size);
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350 |
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351 | return rc;
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352 | }
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353 |
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354 | /** Send IPv6 datagram over Internet link
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355 | *
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356 | * @param ilink Internet link
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357 | * @param ldest Destination MAC address
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358 | * @param dgram IPv6 datagram body
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359 | * @param proto Next header
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360 | * @param ttl Hop limit
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361 | * @param df Do-not-Fragment flag (unused)
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362 | *
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363 | * @return EOK on success
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364 | * @return ENOMEM when not enough memory to create the datagram
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365 | *
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366 | */
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367 | int inet_link_send_dgram6(inet_link_t *ilink, addr48_t ldest,
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368 | inet_dgram_t *dgram, uint8_t proto, uint8_t ttl, int df)
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369 | {
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370 | addr128_t src_v6;
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371 | ip_ver_t src_ver = inet_addr_get(&dgram->src, NULL, &src_v6);
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372 | if (src_ver != ip_v6)
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373 | return EINVAL;
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374 |
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375 | addr128_t dest_v6;
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376 | ip_ver_t dest_ver = inet_addr_get(&dgram->dest, NULL, &dest_v6);
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377 | if (dest_ver != ip_v6)
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378 | return EINVAL;
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379 |
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380 | iplink_sdu6_t sdu6;
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381 | addr48(ldest, sdu6.dest);
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382 |
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383 | /*
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384 | * Fill packet structure. Fragmentation is performed by
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385 | * inet_pdu_encode6().
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386 | */
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387 |
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388 | inet_packet_t packet;
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389 |
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390 | packet.src = dgram->src;
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391 | packet.dest = dgram->dest;
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392 | packet.tos = dgram->tos;
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393 | packet.proto = proto;
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394 | packet.ttl = ttl;
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395 |
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396 | /* Allocate identifier */
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397 | fibril_mutex_lock(&ip_ident_lock);
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398 | packet.ident = ++ip_ident;
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399 | fibril_mutex_unlock(&ip_ident_lock);
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400 |
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401 | packet.df = df;
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402 | packet.data = dgram->data;
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403 | packet.size = dgram->size;
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404 |
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405 | int rc;
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406 | size_t offs = 0;
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407 |
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408 | do {
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409 | /* Encode one fragment */
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410 |
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411 | size_t roffs;
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412 | rc = inet_pdu_encode6(&packet, src_v6, dest_v6, offs, ilink->def_mtu,
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413 | &sdu6.data, &sdu6.size, &roffs);
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414 | if (rc != EOK)
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415 | return rc;
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416 |
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417 | /* Send the PDU */
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418 | rc = iplink_send6(ilink->iplink, &sdu6);
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419 |
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420 | free(sdu6.data);
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421 | offs = roffs;
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422 | } while (offs < packet.size);
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423 |
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424 | return rc;
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425 | }
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426 |
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427 | static inet_link_t *inet_link_get_by_id_locked(sysarg_t link_id)
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428 | {
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429 | assert(fibril_mutex_is_locked(&inet_links_lock));
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430 |
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431 | list_foreach(inet_links, link_list, inet_link_t, ilink) {
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432 | if (ilink->svc_id == link_id)
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433 | return ilink;
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434 | }
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435 |
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436 | return NULL;
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437 | }
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438 |
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439 | inet_link_t *inet_link_get_by_id(sysarg_t link_id)
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440 | {
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441 | inet_link_t *ilink;
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442 |
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443 | fibril_mutex_lock(&inet_links_lock);
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444 | ilink = inet_link_get_by_id_locked(link_id);
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445 | fibril_mutex_unlock(&inet_links_lock);
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446 |
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447 | return ilink;
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448 | }
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449 |
|
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450 | /** Get IDs of all links. */
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451 | int inet_link_get_id_list(sysarg_t **rid_list, size_t *rcount)
|
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452 | {
|
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453 | sysarg_t *id_list;
|
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454 | size_t count, i;
|
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455 |
|
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456 | fibril_mutex_lock(&inet_links_lock);
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457 | count = list_count(&inet_links);
|
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458 |
|
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459 | id_list = calloc(count, sizeof(sysarg_t));
|
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460 | if (id_list == NULL) {
|
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461 | fibril_mutex_unlock(&inet_links_lock);
|
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462 | return ENOMEM;
|
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463 | }
|
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464 |
|
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465 | i = 0;
|
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466 | list_foreach(inet_links, link_list, inet_link_t, ilink) {
|
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467 | id_list[i++] = ilink->svc_id;
|
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468 | log_msg(LOG_DEFAULT, LVL_NOTE, "add link to list");
|
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469 | }
|
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470 |
|
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471 | fibril_mutex_unlock(&inet_links_lock);
|
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472 |
|
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473 | log_msg(LOG_DEFAULT, LVL_NOTE, "return %zu links", count);
|
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474 | *rid_list = id_list;
|
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475 | *rcount = count;
|
---|
476 |
|
---|
477 | return EOK;
|
---|
478 | }
|
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479 |
|
---|
480 | /** @}
|
---|
481 | */
|
---|