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1 | f0cbd3ec | bellard | /*
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2 | f0cbd3ec | bellard | * Copyright (c) 1982, 1986, 1988, 1990, 1993
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3 | f0cbd3ec | bellard | * The Regents of the University of California. All rights reserved.
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4 | f0cbd3ec | bellard | *
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5 | f0cbd3ec | bellard | * Redistribution and use in source and binary forms, with or without
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6 | f0cbd3ec | bellard | * modification, are permitted provided that the following conditions
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7 | f0cbd3ec | bellard | * are met:
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8 | f0cbd3ec | bellard | * 1. Redistributions of source code must retain the above copyright
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9 | f0cbd3ec | bellard | * notice, this list of conditions and the following disclaimer.
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10 | f0cbd3ec | bellard | * 2. Redistributions in binary form must reproduce the above copyright
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11 | f0cbd3ec | bellard | * notice, this list of conditions and the following disclaimer in the
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12 | f0cbd3ec | bellard | * documentation and/or other materials provided with the distribution.
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13 | f0cbd3ec | bellard | * 3. All advertising materials mentioning features or use of this software
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14 | f0cbd3ec | bellard | * must display the following acknowledgement:
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15 | f0cbd3ec | bellard | * This product includes software developed by the University of
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16 | f0cbd3ec | bellard | * California, Berkeley and its contributors.
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17 | f0cbd3ec | bellard | * 4. Neither the name of the University nor the names of its contributors
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18 | f0cbd3ec | bellard | * may be used to endorse or promote products derived from this software
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19 | f0cbd3ec | bellard | * without specific prior written permission.
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20 | f0cbd3ec | bellard | *
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21 | f0cbd3ec | bellard | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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22 | f0cbd3ec | bellard | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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23 | f0cbd3ec | bellard | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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24 | f0cbd3ec | bellard | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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25 | f0cbd3ec | bellard | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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26 | f0cbd3ec | bellard | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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27 | f0cbd3ec | bellard | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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28 | f0cbd3ec | bellard | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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29 | f0cbd3ec | bellard | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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30 | f0cbd3ec | bellard | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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31 | f0cbd3ec | bellard | * SUCH DAMAGE.
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32 | f0cbd3ec | bellard | *
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33 | f0cbd3ec | bellard | * @(#)udp_usrreq.c 8.4 (Berkeley) 1/21/94
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34 | f0cbd3ec | bellard | * udp_usrreq.c,v 1.4 1994/10/02 17:48:45 phk Exp
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35 | f0cbd3ec | bellard | */
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36 | f0cbd3ec | bellard | |
37 | f0cbd3ec | bellard | /*
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38 | f0cbd3ec | bellard | * Changes and additions relating to SLiRP
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39 | f0cbd3ec | bellard | * Copyright (c) 1995 Danny Gasparovski.
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40 | 5fafdf24 | ths | *
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41 | 5fafdf24 | ths | * Please read the file COPYRIGHT for the
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42 | f0cbd3ec | bellard | * terms and conditions of the copyright.
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43 | f0cbd3ec | bellard | */
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44 | f0cbd3ec | bellard | |
45 | f0cbd3ec | bellard | #include <slirp.h> |
46 | f0cbd3ec | bellard | #include "ip_icmp.h" |
47 | f0cbd3ec | bellard | |
48 | f0cbd3ec | bellard | struct udpstat udpstat;
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49 | f0cbd3ec | bellard | |
50 | f0cbd3ec | bellard | struct socket udb;
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51 | f0cbd3ec | bellard | |
52 | f0cbd3ec | bellard | /*
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53 | f0cbd3ec | bellard | * UDP protocol implementation.
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54 | f0cbd3ec | bellard | * Per RFC 768, August, 1980.
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55 | f0cbd3ec | bellard | */
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56 | f0cbd3ec | bellard | #ifndef COMPAT_42
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57 | f0cbd3ec | bellard | int udpcksum = 1; |
58 | f0cbd3ec | bellard | #else
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59 | f0cbd3ec | bellard | int udpcksum = 0; /* XXX */ |
60 | f0cbd3ec | bellard | #endif
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61 | f0cbd3ec | bellard | |
62 | f0cbd3ec | bellard | struct socket *udp_last_so = &udb;
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63 | f0cbd3ec | bellard | |
64 | f0cbd3ec | bellard | void
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65 | f0cbd3ec | bellard | udp_init() |
66 | f0cbd3ec | bellard | { |
67 | f0cbd3ec | bellard | udb.so_next = udb.so_prev = &udb; |
68 | f0cbd3ec | bellard | } |
69 | 5fafdf24 | ths | /* m->m_data points at ip packet header
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70 | 5fafdf24 | ths | * m->m_len length ip packet
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71 | f0cbd3ec | bellard | * ip->ip_len length data (IPDU)
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72 | f0cbd3ec | bellard | */
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73 | f0cbd3ec | bellard | void
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74 | f0cbd3ec | bellard | udp_input(m, iphlen) |
75 | f0cbd3ec | bellard | register struct mbuf *m; |
76 | f0cbd3ec | bellard | int iphlen;
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77 | f0cbd3ec | bellard | { |
78 | f0cbd3ec | bellard | register struct ip *ip; |
79 | f0cbd3ec | bellard | register struct udphdr *uh; |
80 | f0cbd3ec | bellard | /* struct mbuf *opts = 0;*/
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81 | f0cbd3ec | bellard | int len;
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82 | 5fafdf24 | ths | struct ip save_ip;
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83 | f0cbd3ec | bellard | struct socket *so;
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84 | 5fafdf24 | ths | |
85 | f0cbd3ec | bellard | DEBUG_CALL("udp_input");
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86 | f0cbd3ec | bellard | DEBUG_ARG("m = %lx", (long)m); |
87 | f0cbd3ec | bellard | DEBUG_ARG("iphlen = %d", iphlen);
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88 | 5fafdf24 | ths | |
89 | f0cbd3ec | bellard | udpstat.udps_ipackets++; |
90 | f0cbd3ec | bellard | |
91 | f0cbd3ec | bellard | /*
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92 | f0cbd3ec | bellard | * Strip IP options, if any; should skip this,
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93 | f0cbd3ec | bellard | * make available to user, and use on returned packets,
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94 | f0cbd3ec | bellard | * but we don't yet have a way to check the checksum
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95 | f0cbd3ec | bellard | * with options still present.
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96 | f0cbd3ec | bellard | */
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97 | f0cbd3ec | bellard | if(iphlen > sizeof(struct ip)) { |
98 | f0cbd3ec | bellard | ip_stripoptions(m, (struct mbuf *)0); |
99 | f0cbd3ec | bellard | iphlen = sizeof(struct ip); |
100 | f0cbd3ec | bellard | } |
101 | f0cbd3ec | bellard | |
102 | f0cbd3ec | bellard | /*
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103 | f0cbd3ec | bellard | * Get IP and UDP header together in first mbuf.
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104 | f0cbd3ec | bellard | */
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105 | f0cbd3ec | bellard | ip = mtod(m, struct ip *);
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106 | f0cbd3ec | bellard | uh = (struct udphdr *)((caddr_t)ip + iphlen);
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107 | f0cbd3ec | bellard | |
108 | f0cbd3ec | bellard | /*
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109 | f0cbd3ec | bellard | * Make mbuf data length reflect UDP length.
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110 | f0cbd3ec | bellard | * If not enough data to reflect UDP length, drop.
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111 | f0cbd3ec | bellard | */
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112 | f0cbd3ec | bellard | len = ntohs((u_int16_t)uh->uh_ulen); |
113 | f0cbd3ec | bellard | |
114 | f0cbd3ec | bellard | if (ip->ip_len != len) {
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115 | f0cbd3ec | bellard | if (len > ip->ip_len) {
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116 | f0cbd3ec | bellard | udpstat.udps_badlen++; |
117 | f0cbd3ec | bellard | goto bad;
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118 | f0cbd3ec | bellard | } |
119 | f0cbd3ec | bellard | m_adj(m, len - ip->ip_len); |
120 | f0cbd3ec | bellard | ip->ip_len = len; |
121 | f0cbd3ec | bellard | } |
122 | 5fafdf24 | ths | |
123 | f0cbd3ec | bellard | /*
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124 | f0cbd3ec | bellard | * Save a copy of the IP header in case we want restore it
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125 | f0cbd3ec | bellard | * for sending an ICMP error message in response.
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126 | f0cbd3ec | bellard | */
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127 | 5fafdf24 | ths | save_ip = *ip; |
128 | f0cbd3ec | bellard | save_ip.ip_len+= iphlen; /* tcp_input subtracts this */
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129 | f0cbd3ec | bellard | |
130 | f0cbd3ec | bellard | /*
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131 | f0cbd3ec | bellard | * Checksum extended UDP header and data.
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132 | f0cbd3ec | bellard | */
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133 | f0cbd3ec | bellard | if (udpcksum && uh->uh_sum) {
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134 | f0cbd3ec | bellard | ((struct ipovly *)ip)->ih_next = 0; |
135 | f0cbd3ec | bellard | ((struct ipovly *)ip)->ih_prev = 0; |
136 | f0cbd3ec | bellard | ((struct ipovly *)ip)->ih_x1 = 0; |
137 | f0cbd3ec | bellard | ((struct ipovly *)ip)->ih_len = uh->uh_ulen;
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138 | f0cbd3ec | bellard | /* keep uh_sum for ICMP reply
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139 | 5fafdf24 | ths | * uh->uh_sum = cksum(m, len + sizeof (struct ip));
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140 | 5fafdf24 | ths | * if (uh->uh_sum) {
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141 | f0cbd3ec | bellard | */
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142 | f0cbd3ec | bellard | if(cksum(m, len + sizeof(struct ip))) { |
143 | f0cbd3ec | bellard | udpstat.udps_badsum++; |
144 | f0cbd3ec | bellard | goto bad;
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145 | f0cbd3ec | bellard | } |
146 | f0cbd3ec | bellard | } |
147 | f0cbd3ec | bellard | |
148 | f0cbd3ec | bellard | /*
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149 | f0cbd3ec | bellard | * handle DHCP/BOOTP
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150 | f0cbd3ec | bellard | */
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151 | f0cbd3ec | bellard | if (ntohs(uh->uh_dport) == BOOTP_SERVER) {
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152 | f0cbd3ec | bellard | bootp_input(m); |
153 | f0cbd3ec | bellard | goto bad;
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154 | f0cbd3ec | bellard | } |
155 | f0cbd3ec | bellard | |
156 | c7f74643 | bellard | /*
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157 | c7f74643 | bellard | * handle TFTP
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158 | c7f74643 | bellard | */
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159 | c7f74643 | bellard | if (ntohs(uh->uh_dport) == TFTP_SERVER) {
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160 | c7f74643 | bellard | tftp_input(m); |
161 | c7f74643 | bellard | goto bad;
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162 | c7f74643 | bellard | } |
163 | c7f74643 | bellard | |
164 | f0cbd3ec | bellard | /*
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165 | f0cbd3ec | bellard | * Locate pcb for datagram.
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166 | f0cbd3ec | bellard | */
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167 | f0cbd3ec | bellard | so = udp_last_so; |
168 | f0cbd3ec | bellard | if (so->so_lport != uh->uh_sport ||
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169 | f0cbd3ec | bellard | so->so_laddr.s_addr != ip->ip_src.s_addr) { |
170 | f0cbd3ec | bellard | struct socket *tmp;
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171 | 3b46e624 | ths | |
172 | f0cbd3ec | bellard | for (tmp = udb.so_next; tmp != &udb; tmp = tmp->so_next) {
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173 | f0cbd3ec | bellard | if (tmp->so_lport == uh->uh_sport &&
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174 | f0cbd3ec | bellard | tmp->so_laddr.s_addr == ip->ip_src.s_addr) { |
175 | f0cbd3ec | bellard | tmp->so_faddr.s_addr = ip->ip_dst.s_addr; |
176 | f0cbd3ec | bellard | tmp->so_fport = uh->uh_dport; |
177 | f0cbd3ec | bellard | so = tmp; |
178 | f0cbd3ec | bellard | break;
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179 | f0cbd3ec | bellard | } |
180 | f0cbd3ec | bellard | } |
181 | f0cbd3ec | bellard | if (tmp == &udb) {
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182 | f0cbd3ec | bellard | so = NULL;
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183 | f0cbd3ec | bellard | } else {
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184 | f0cbd3ec | bellard | udpstat.udpps_pcbcachemiss++; |
185 | f0cbd3ec | bellard | udp_last_so = so; |
186 | f0cbd3ec | bellard | } |
187 | f0cbd3ec | bellard | } |
188 | 5fafdf24 | ths | |
189 | f0cbd3ec | bellard | if (so == NULL) { |
190 | f0cbd3ec | bellard | /*
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191 | f0cbd3ec | bellard | * If there's no socket for this packet,
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192 | f0cbd3ec | bellard | * create one
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193 | f0cbd3ec | bellard | */
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194 | f0cbd3ec | bellard | if ((so = socreate()) == NULL) goto bad; |
195 | f0cbd3ec | bellard | if(udp_attach(so) == -1) { |
196 | 5fafdf24 | ths | DEBUG_MISC((dfd," udp_attach errno = %d-%s\n",
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197 | f0cbd3ec | bellard | errno,strerror(errno))); |
198 | f0cbd3ec | bellard | sofree(so); |
199 | f0cbd3ec | bellard | goto bad;
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200 | f0cbd3ec | bellard | } |
201 | 3b46e624 | ths | |
202 | f0cbd3ec | bellard | /*
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203 | f0cbd3ec | bellard | * Setup fields
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204 | f0cbd3ec | bellard | */
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205 | f0cbd3ec | bellard | /* udp_last_so = so; */
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206 | f0cbd3ec | bellard | so->so_laddr = ip->ip_src; |
207 | f0cbd3ec | bellard | so->so_lport = uh->uh_sport; |
208 | 3b46e624 | ths | |
209 | f0cbd3ec | bellard | if ((so->so_iptos = udp_tos(so)) == 0) |
210 | f0cbd3ec | bellard | so->so_iptos = ip->ip_tos; |
211 | 3b46e624 | ths | |
212 | f0cbd3ec | bellard | /*
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213 | f0cbd3ec | bellard | * XXXXX Here, check if it's in udpexec_list,
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214 | f0cbd3ec | bellard | * and if it is, do the fork_exec() etc.
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215 | f0cbd3ec | bellard | */
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216 | f0cbd3ec | bellard | } |
217 | f0cbd3ec | bellard | |
218 | 54fd9cdf | ths | so->so_faddr = ip->ip_dst; /* XXX */
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219 | 54fd9cdf | ths | so->so_fport = uh->uh_dport; /* XXX */
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220 | 54fd9cdf | ths | |
221 | f0cbd3ec | bellard | iphlen += sizeof(struct udphdr); |
222 | f0cbd3ec | bellard | m->m_len -= iphlen; |
223 | f0cbd3ec | bellard | m->m_data += iphlen; |
224 | f0cbd3ec | bellard | |
225 | f0cbd3ec | bellard | /*
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226 | f0cbd3ec | bellard | * Now we sendto() the packet.
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227 | f0cbd3ec | bellard | */
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228 | f0cbd3ec | bellard | if (so->so_emu)
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229 | f0cbd3ec | bellard | udp_emu(so, m); |
230 | f0cbd3ec | bellard | |
231 | f0cbd3ec | bellard | if(sosendto(so,m) == -1) { |
232 | f0cbd3ec | bellard | m->m_len += iphlen; |
233 | f0cbd3ec | bellard | m->m_data -= iphlen; |
234 | f0cbd3ec | bellard | *ip=save_ip; |
235 | f0cbd3ec | bellard | DEBUG_MISC((dfd,"udp tx errno = %d-%s\n",errno,strerror(errno)));
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236 | 3b46e624 | ths | icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno));
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237 | f0cbd3ec | bellard | } |
238 | f0cbd3ec | bellard | |
239 | f0cbd3ec | bellard | m_free(so->so_m); /* used for ICMP if error on sorecvfrom */
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240 | f0cbd3ec | bellard | |
241 | f0cbd3ec | bellard | /* restore the orig mbuf packet */
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242 | f0cbd3ec | bellard | m->m_len += iphlen; |
243 | f0cbd3ec | bellard | m->m_data -= iphlen; |
244 | f0cbd3ec | bellard | *ip=save_ip; |
245 | f0cbd3ec | bellard | so->so_m=m; /* ICMP backup */
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246 | f0cbd3ec | bellard | |
247 | f0cbd3ec | bellard | return;
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248 | f0cbd3ec | bellard | bad:
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249 | f0cbd3ec | bellard | m_freem(m); |
250 | f0cbd3ec | bellard | /* if (opts) m_freem(opts); */
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251 | f0cbd3ec | bellard | return;
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252 | f0cbd3ec | bellard | } |
253 | f0cbd3ec | bellard | |
254 | 5fafdf24 | ths | int udp_output2(struct socket *so, struct mbuf *m, |
255 | f0cbd3ec | bellard | struct sockaddr_in *saddr, struct sockaddr_in *daddr, |
256 | f0cbd3ec | bellard | int iptos)
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257 | f0cbd3ec | bellard | { |
258 | f0cbd3ec | bellard | register struct udpiphdr *ui; |
259 | f0cbd3ec | bellard | int error = 0; |
260 | f0cbd3ec | bellard | |
261 | f0cbd3ec | bellard | DEBUG_CALL("udp_output");
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262 | f0cbd3ec | bellard | DEBUG_ARG("so = %lx", (long)so); |
263 | f0cbd3ec | bellard | DEBUG_ARG("m = %lx", (long)m); |
264 | f0cbd3ec | bellard | DEBUG_ARG("saddr = %lx", (long)saddr->sin_addr.s_addr); |
265 | f0cbd3ec | bellard | DEBUG_ARG("daddr = %lx", (long)daddr->sin_addr.s_addr); |
266 | f0cbd3ec | bellard | |
267 | f0cbd3ec | bellard | /*
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268 | f0cbd3ec | bellard | * Adjust for header
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269 | f0cbd3ec | bellard | */
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270 | f0cbd3ec | bellard | m->m_data -= sizeof(struct udpiphdr); |
271 | f0cbd3ec | bellard | m->m_len += sizeof(struct udpiphdr); |
272 | 5fafdf24 | ths | |
273 | f0cbd3ec | bellard | /*
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274 | f0cbd3ec | bellard | * Fill in mbuf with extended UDP header
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275 | f0cbd3ec | bellard | * and addresses and length put into network format.
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276 | f0cbd3ec | bellard | */
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277 | f0cbd3ec | bellard | ui = mtod(m, struct udpiphdr *);
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278 | f0cbd3ec | bellard | ui->ui_next = ui->ui_prev = 0;
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279 | f0cbd3ec | bellard | ui->ui_x1 = 0;
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280 | f0cbd3ec | bellard | ui->ui_pr = IPPROTO_UDP; |
281 | f0cbd3ec | bellard | ui->ui_len = htons(m->m_len - sizeof(struct ip)); /* + sizeof (struct udphdr)); */ |
282 | f0cbd3ec | bellard | /* XXXXX Check for from-one-location sockets, or from-any-location sockets */
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283 | f0cbd3ec | bellard | ui->ui_src = saddr->sin_addr; |
284 | f0cbd3ec | bellard | ui->ui_dst = daddr->sin_addr; |
285 | f0cbd3ec | bellard | ui->ui_sport = saddr->sin_port; |
286 | f0cbd3ec | bellard | ui->ui_dport = daddr->sin_port; |
287 | f0cbd3ec | bellard | ui->ui_ulen = ui->ui_len; |
288 | f0cbd3ec | bellard | |
289 | f0cbd3ec | bellard | /*
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290 | f0cbd3ec | bellard | * Stuff checksum and output datagram.
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291 | f0cbd3ec | bellard | */
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292 | f0cbd3ec | bellard | ui->ui_sum = 0;
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293 | f0cbd3ec | bellard | if (udpcksum) {
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294 | f0cbd3ec | bellard | if ((ui->ui_sum = cksum(m, /* sizeof (struct udpiphdr) + */ m->m_len)) == 0) |
295 | f0cbd3ec | bellard | ui->ui_sum = 0xffff;
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296 | f0cbd3ec | bellard | } |
297 | f0cbd3ec | bellard | ((struct ip *)ui)->ip_len = m->m_len;
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298 | f0cbd3ec | bellard | |
299 | f0cbd3ec | bellard | ((struct ip *)ui)->ip_ttl = ip_defttl;
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300 | f0cbd3ec | bellard | ((struct ip *)ui)->ip_tos = iptos;
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301 | 5fafdf24 | ths | |
302 | f0cbd3ec | bellard | udpstat.udps_opackets++; |
303 | 5fafdf24 | ths | |
304 | f0cbd3ec | bellard | error = ip_output(so, m); |
305 | 5fafdf24 | ths | |
306 | f0cbd3ec | bellard | return (error);
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307 | f0cbd3ec | bellard | } |
308 | f0cbd3ec | bellard | |
309 | 5fafdf24 | ths | int udp_output(struct socket *so, struct mbuf *m, |
310 | f0cbd3ec | bellard | struct sockaddr_in *addr)
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311 | f0cbd3ec | bellard | |
312 | f0cbd3ec | bellard | { |
313 | f0cbd3ec | bellard | struct sockaddr_in saddr, daddr;
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314 | f0cbd3ec | bellard | |
315 | f0cbd3ec | bellard | saddr = *addr; |
316 | c904d61f | bellard | if ((so->so_faddr.s_addr & htonl(0xffffff00)) == special_addr.s_addr) { |
317 | f0cbd3ec | bellard | saddr.sin_addr.s_addr = so->so_faddr.s_addr; |
318 | c904d61f | bellard | if ((so->so_faddr.s_addr & htonl(0x000000ff)) == htonl(0xff)) |
319 | c904d61f | bellard | saddr.sin_addr.s_addr = alias_addr.s_addr; |
320 | c904d61f | bellard | } |
321 | f0cbd3ec | bellard | daddr.sin_addr = so->so_laddr; |
322 | f0cbd3ec | bellard | daddr.sin_port = so->so_lport; |
323 | 3b46e624 | ths | |
324 | f0cbd3ec | bellard | return udp_output2(so, m, &saddr, &daddr, so->so_iptos);
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325 | f0cbd3ec | bellard | } |
326 | f0cbd3ec | bellard | |
327 | f0cbd3ec | bellard | int
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328 | f0cbd3ec | bellard | udp_attach(so) |
329 | f0cbd3ec | bellard | struct socket *so;
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330 | f0cbd3ec | bellard | { |
331 | f0cbd3ec | bellard | struct sockaddr_in addr;
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332 | 5fafdf24 | ths | |
333 | f0cbd3ec | bellard | if((so->s = socket(AF_INET,SOCK_DGRAM,0)) != -1) { |
334 | f0cbd3ec | bellard | /*
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335 | f0cbd3ec | bellard | * Here, we bind() the socket. Although not really needed
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336 | f0cbd3ec | bellard | * (sendto() on an unbound socket will bind it), it's done
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337 | f0cbd3ec | bellard | * here so that emulation of ytalk etc. don't have to do it
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338 | f0cbd3ec | bellard | */
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339 | f0cbd3ec | bellard | addr.sin_family = AF_INET; |
340 | f0cbd3ec | bellard | addr.sin_port = 0;
|
341 | f0cbd3ec | bellard | addr.sin_addr.s_addr = INADDR_ANY; |
342 | f0cbd3ec | bellard | if(bind(so->s, (struct sockaddr *)&addr, sizeof(addr))<0) { |
343 | f0cbd3ec | bellard | int lasterrno=errno;
|
344 | 379ff53d | bellard | closesocket(so->s); |
345 | f0cbd3ec | bellard | so->s=-1;
|
346 | 02d2c54c | bellard | #ifdef _WIN32
|
347 | 02d2c54c | bellard | WSASetLastError(lasterrno); |
348 | 02d2c54c | bellard | #else
|
349 | f0cbd3ec | bellard | errno=lasterrno; |
350 | 02d2c54c | bellard | #endif
|
351 | f0cbd3ec | bellard | } else {
|
352 | f0cbd3ec | bellard | /* success, insert in queue */
|
353 | f0cbd3ec | bellard | so->so_expire = curtime + SO_EXPIRE; |
354 | f0cbd3ec | bellard | insque(so,&udb); |
355 | f0cbd3ec | bellard | } |
356 | f0cbd3ec | bellard | } |
357 | f0cbd3ec | bellard | return(so->s);
|
358 | f0cbd3ec | bellard | } |
359 | f0cbd3ec | bellard | |
360 | f0cbd3ec | bellard | void
|
361 | f0cbd3ec | bellard | udp_detach(so) |
362 | f0cbd3ec | bellard | struct socket *so;
|
363 | f0cbd3ec | bellard | { |
364 | 379ff53d | bellard | closesocket(so->s); |
365 | f0cbd3ec | bellard | /* if (so->so_m) m_free(so->so_m); done by sofree */
|
366 | f0cbd3ec | bellard | |
367 | f0cbd3ec | bellard | sofree(so); |
368 | f0cbd3ec | bellard | } |
369 | f0cbd3ec | bellard | |
370 | f0cbd3ec | bellard | struct tos_t udptos[] = {
|
371 | f0cbd3ec | bellard | {0, 53, IPTOS_LOWDELAY, 0}, /* DNS */ |
372 | f0cbd3ec | bellard | {517, 517, IPTOS_LOWDELAY, EMU_TALK}, /* talk */ |
373 | f0cbd3ec | bellard | {518, 518, IPTOS_LOWDELAY, EMU_NTALK}, /* ntalk */ |
374 | f0cbd3ec | bellard | {0, 7648, IPTOS_LOWDELAY, EMU_CUSEEME}, /* Cu-Seeme */ |
375 | f0cbd3ec | bellard | {0, 0, 0, 0} |
376 | f0cbd3ec | bellard | }; |
377 | f0cbd3ec | bellard | |
378 | f0cbd3ec | bellard | u_int8_t |
379 | f0cbd3ec | bellard | udp_tos(so) |
380 | f0cbd3ec | bellard | struct socket *so;
|
381 | f0cbd3ec | bellard | { |
382 | f0cbd3ec | bellard | int i = 0; |
383 | 5fafdf24 | ths | |
384 | f0cbd3ec | bellard | while(udptos[i].tos) {
|
385 | f0cbd3ec | bellard | if ((udptos[i].fport && ntohs(so->so_fport) == udptos[i].fport) ||
|
386 | f0cbd3ec | bellard | (udptos[i].lport && ntohs(so->so_lport) == udptos[i].lport)) { |
387 | f0cbd3ec | bellard | so->so_emu = udptos[i].emu; |
388 | f0cbd3ec | bellard | return udptos[i].tos;
|
389 | f0cbd3ec | bellard | } |
390 | f0cbd3ec | bellard | i++; |
391 | f0cbd3ec | bellard | } |
392 | 5fafdf24 | ths | |
393 | f0cbd3ec | bellard | return 0; |
394 | f0cbd3ec | bellard | } |
395 | f0cbd3ec | bellard | |
396 | f0cbd3ec | bellard | #ifdef EMULATE_TALK
|
397 | f0cbd3ec | bellard | #include "talkd.h" |
398 | f0cbd3ec | bellard | #endif
|
399 | f0cbd3ec | bellard | |
400 | f0cbd3ec | bellard | /*
|
401 | f0cbd3ec | bellard | * Here, talk/ytalk/ntalk requests must be emulated
|
402 | f0cbd3ec | bellard | */
|
403 | f0cbd3ec | bellard | void
|
404 | f0cbd3ec | bellard | udp_emu(so, m) |
405 | f0cbd3ec | bellard | struct socket *so;
|
406 | f0cbd3ec | bellard | struct mbuf *m;
|
407 | f0cbd3ec | bellard | { |
408 | f0cbd3ec | bellard | struct sockaddr_in addr;
|
409 | f0cbd3ec | bellard | int addrlen = sizeof(addr); |
410 | f0cbd3ec | bellard | #ifdef EMULATE_TALK
|
411 | f0cbd3ec | bellard | CTL_MSG_OLD *omsg; |
412 | f0cbd3ec | bellard | CTL_MSG *nmsg; |
413 | f0cbd3ec | bellard | char buff[sizeof(CTL_MSG)]; |
414 | f0cbd3ec | bellard | u_char type; |
415 | 5fafdf24 | ths | |
416 | f0cbd3ec | bellard | struct talk_request {
|
417 | f0cbd3ec | bellard | struct talk_request *next;
|
418 | f0cbd3ec | bellard | struct socket *udp_so;
|
419 | f0cbd3ec | bellard | struct socket *tcp_so;
|
420 | f0cbd3ec | bellard | } *req; |
421 | 5fafdf24 | ths | |
422 | 5fafdf24 | ths | static struct talk_request *req_tbl = 0; |
423 | 5fafdf24 | ths | |
424 | f0cbd3ec | bellard | #endif
|
425 | 5fafdf24 | ths | |
426 | f0cbd3ec | bellard | struct cu_header {
|
427 | 101c5935 | bellard | uint16_t d_family; // destination family
|
428 | 101c5935 | bellard | uint16_t d_port; // destination port
|
429 | 101c5935 | bellard | uint32_t d_addr; // destination address
|
430 | 101c5935 | bellard | uint16_t s_family; // source family
|
431 | 101c5935 | bellard | uint16_t s_port; // source port
|
432 | 51a36cb2 | bellard | uint32_t so_addr; // source address
|
433 | 101c5935 | bellard | uint32_t seqn; // sequence number
|
434 | 101c5935 | bellard | uint16_t message; // message
|
435 | 101c5935 | bellard | uint16_t data_type; // data type
|
436 | 101c5935 | bellard | uint16_t pkt_len; // packet length
|
437 | f0cbd3ec | bellard | } *cu_head; |
438 | f0cbd3ec | bellard | |
439 | f0cbd3ec | bellard | switch(so->so_emu) {
|
440 | f0cbd3ec | bellard | |
441 | f0cbd3ec | bellard | #ifdef EMULATE_TALK
|
442 | f0cbd3ec | bellard | case EMU_TALK:
|
443 | f0cbd3ec | bellard | case EMU_NTALK:
|
444 | f0cbd3ec | bellard | /*
|
445 | f0cbd3ec | bellard | * Talk emulation. We always change the ctl_addr to get
|
446 | f0cbd3ec | bellard | * some answers from the daemon. When an ANNOUNCE comes,
|
447 | f0cbd3ec | bellard | * we send LEAVE_INVITE to the local daemons. Also when a
|
448 | f0cbd3ec | bellard | * DELETE comes, we send copies to the local daemons.
|
449 | f0cbd3ec | bellard | */
|
450 | f0cbd3ec | bellard | if (getsockname(so->s, (struct sockaddr *)&addr, &addrlen) < 0) |
451 | f0cbd3ec | bellard | return;
|
452 | 3b46e624 | ths | |
453 | f0cbd3ec | bellard | #define IS_OLD (so->so_emu == EMU_TALK)
|
454 | f0cbd3ec | bellard | |
455 | f0cbd3ec | bellard | #define COPY_MSG(dest, src) { dest->type = src->type; \
|
456 | f0cbd3ec | bellard | dest->id_num = src->id_num; \ |
457 | f0cbd3ec | bellard | dest->pid = src->pid; \ |
458 | f0cbd3ec | bellard | dest->addr = src->addr; \ |
459 | f0cbd3ec | bellard | dest->ctl_addr = src->ctl_addr; \ |
460 | f0cbd3ec | bellard | memcpy(&dest->l_name, &src->l_name, NAME_SIZE_OLD); \ |
461 | f0cbd3ec | bellard | memcpy(&dest->r_name, &src->r_name, NAME_SIZE_OLD); \ |
462 | f0cbd3ec | bellard | memcpy(&dest->r_tty, &src->r_tty, TTY_SIZE); } |
463 | f0cbd3ec | bellard | |
464 | f0cbd3ec | bellard | #define OTOSIN(ptr, field) ((struct sockaddr_in *)&ptr->field) |
465 | f0cbd3ec | bellard | /* old_sockaddr to sockaddr_in */
|
466 | f0cbd3ec | bellard | |
467 | f0cbd3ec | bellard | |
468 | f0cbd3ec | bellard | if (IS_OLD) { /* old talk */ |
469 | f0cbd3ec | bellard | omsg = mtod(m, CTL_MSG_OLD*); |
470 | f0cbd3ec | bellard | nmsg = (CTL_MSG *) buff; |
471 | f0cbd3ec | bellard | type = omsg->type; |
472 | f0cbd3ec | bellard | OTOSIN(omsg, ctl_addr)->sin_port = addr.sin_port; |
473 | f0cbd3ec | bellard | OTOSIN(omsg, ctl_addr)->sin_addr = our_addr; |
474 | f0cbd3ec | bellard | strncpy(omsg->l_name, getlogin(), NAME_SIZE_OLD); |
475 | 5fafdf24 | ths | } else { /* new talk */ |
476 | f0cbd3ec | bellard | omsg = (CTL_MSG_OLD *) buff; |
477 | f0cbd3ec | bellard | nmsg = mtod(m, CTL_MSG *); |
478 | f0cbd3ec | bellard | type = nmsg->type; |
479 | f0cbd3ec | bellard | OTOSIN(nmsg, ctl_addr)->sin_port = addr.sin_port; |
480 | f0cbd3ec | bellard | OTOSIN(nmsg, ctl_addr)->sin_addr = our_addr; |
481 | f0cbd3ec | bellard | strncpy(nmsg->l_name, getlogin(), NAME_SIZE_OLD); |
482 | f0cbd3ec | bellard | } |
483 | 3b46e624 | ths | |
484 | 5fafdf24 | ths | if (type == LOOK_UP)
|
485 | f0cbd3ec | bellard | return; /* for LOOK_UP this is enough */ |
486 | 3b46e624 | ths | |
487 | f0cbd3ec | bellard | if (IS_OLD) { /* make a copy of the message */ |
488 | f0cbd3ec | bellard | COPY_MSG(nmsg, omsg); |
489 | f0cbd3ec | bellard | nmsg->vers = 1;
|
490 | f0cbd3ec | bellard | nmsg->answer = 0;
|
491 | f0cbd3ec | bellard | } else
|
492 | f0cbd3ec | bellard | COPY_MSG(omsg, nmsg); |
493 | f0cbd3ec | bellard | |
494 | f0cbd3ec | bellard | /*
|
495 | f0cbd3ec | bellard | * If if is an ANNOUNCE message, we go through the
|
496 | f0cbd3ec | bellard | * request table to see if a tcp port has already
|
497 | f0cbd3ec | bellard | * been redirected for this socket. If not, we solisten()
|
498 | f0cbd3ec | bellard | * a new socket and add this entry to the table.
|
499 | f0cbd3ec | bellard | * The port number of the tcp socket and our IP
|
500 | f0cbd3ec | bellard | * are put to the addr field of the message structures.
|
501 | f0cbd3ec | bellard | * Then a LEAVE_INVITE is sent to both local daemon
|
502 | f0cbd3ec | bellard | * ports, 517 and 518. This is why we have two copies
|
503 | f0cbd3ec | bellard | * of the message, one in old talk and one in new talk
|
504 | f0cbd3ec | bellard | * format.
|
505 | 5fafdf24 | ths | */
|
506 | f0cbd3ec | bellard | |
507 | f0cbd3ec | bellard | if (type == ANNOUNCE) {
|
508 | f0cbd3ec | bellard | int s;
|
509 | f0cbd3ec | bellard | u_short temp_port; |
510 | 3b46e624 | ths | |
511 | f0cbd3ec | bellard | for(req = req_tbl; req; req = req->next)
|
512 | f0cbd3ec | bellard | if (so == req->udp_so)
|
513 | f0cbd3ec | bellard | break; /* found it */ |
514 | 3b46e624 | ths | |
515 | f0cbd3ec | bellard | if (!req) { /* no entry for so, create new */ |
516 | f0cbd3ec | bellard | req = (struct talk_request *)
|
517 | f0cbd3ec | bellard | malloc(sizeof(struct talk_request)); |
518 | f0cbd3ec | bellard | req->udp_so = so; |
519 | 3b46e624 | ths | req->tcp_so = solisten(0,
|
520 | 5fafdf24 | ths | OTOSIN(omsg, addr)->sin_addr.s_addr, |
521 | f0cbd3ec | bellard | OTOSIN(omsg, addr)->sin_port, |
522 | f0cbd3ec | bellard | SS_FACCEPTONCE); |
523 | f0cbd3ec | bellard | req->next = req_tbl; |
524 | f0cbd3ec | bellard | req_tbl = req; |
525 | 3b46e624 | ths | } |
526 | 3b46e624 | ths | |
527 | f0cbd3ec | bellard | /* replace port number in addr field */
|
528 | f0cbd3ec | bellard | addrlen = sizeof(addr);
|
529 | 5fafdf24 | ths | getsockname(req->tcp_so->s, |
530 | f0cbd3ec | bellard | (struct sockaddr *) &addr,
|
531 | 3b46e624 | ths | &addrlen); |
532 | f0cbd3ec | bellard | OTOSIN(omsg, addr)->sin_port = addr.sin_port; |
533 | f0cbd3ec | bellard | OTOSIN(omsg, addr)->sin_addr = our_addr; |
534 | f0cbd3ec | bellard | OTOSIN(nmsg, addr)->sin_port = addr.sin_port; |
535 | 3b46e624 | ths | OTOSIN(nmsg, addr)->sin_addr = our_addr; |
536 | 3b46e624 | ths | |
537 | f0cbd3ec | bellard | /* send LEAVE_INVITEs */
|
538 | f0cbd3ec | bellard | temp_port = OTOSIN(omsg, ctl_addr)->sin_port; |
539 | f0cbd3ec | bellard | OTOSIN(omsg, ctl_addr)->sin_port = 0;
|
540 | f0cbd3ec | bellard | OTOSIN(nmsg, ctl_addr)->sin_port = 0;
|
541 | 3b46e624 | ths | omsg->type = nmsg->type = LEAVE_INVITE; |
542 | 3b46e624 | ths | |
543 | f0cbd3ec | bellard | s = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); |
544 | f0cbd3ec | bellard | addr.sin_addr = our_addr; |
545 | f0cbd3ec | bellard | addr.sin_family = AF_INET; |
546 | f0cbd3ec | bellard | addr.sin_port = htons(517);
|
547 | 5fafdf24 | ths | sendto(s, (char *)omsg, sizeof(*omsg), 0, |
548 | f0cbd3ec | bellard | (struct sockaddr *)&addr, sizeof(addr)); |
549 | f0cbd3ec | bellard | addr.sin_port = htons(518);
|
550 | f0cbd3ec | bellard | sendto(s, (char *)nmsg, sizeof(*nmsg), 0, |
551 | f0cbd3ec | bellard | (struct sockaddr *) &addr, sizeof(addr)); |
552 | 379ff53d | bellard | closesocket(s) ; |
553 | f0cbd3ec | bellard | |
554 | 5fafdf24 | ths | omsg->type = nmsg->type = ANNOUNCE; |
555 | f0cbd3ec | bellard | OTOSIN(omsg, ctl_addr)->sin_port = temp_port; |
556 | f0cbd3ec | bellard | OTOSIN(nmsg, ctl_addr)->sin_port = temp_port; |
557 | f0cbd3ec | bellard | } |
558 | 3b46e624 | ths | |
559 | 5fafdf24 | ths | /*
|
560 | f0cbd3ec | bellard | * If it is a DELETE message, we send a copy to the
|
561 | f0cbd3ec | bellard | * local daemons. Then we delete the entry corresponding
|
562 | f0cbd3ec | bellard | * to our socket from the request table.
|
563 | f0cbd3ec | bellard | */
|
564 | 3b46e624 | ths | |
565 | f0cbd3ec | bellard | if (type == DELETE) {
|
566 | f0cbd3ec | bellard | struct talk_request *temp_req, *req_next;
|
567 | f0cbd3ec | bellard | int s;
|
568 | f0cbd3ec | bellard | u_short temp_port; |
569 | 3b46e624 | ths | |
570 | f0cbd3ec | bellard | temp_port = OTOSIN(omsg, ctl_addr)->sin_port; |
571 | f0cbd3ec | bellard | OTOSIN(omsg, ctl_addr)->sin_port = 0;
|
572 | f0cbd3ec | bellard | OTOSIN(nmsg, ctl_addr)->sin_port = 0;
|
573 | 3b46e624 | ths | |
574 | f0cbd3ec | bellard | s = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP); |
575 | f0cbd3ec | bellard | addr.sin_addr = our_addr; |
576 | f0cbd3ec | bellard | addr.sin_family = AF_INET; |
577 | f0cbd3ec | bellard | addr.sin_port = htons(517);
|
578 | f0cbd3ec | bellard | sendto(s, (char *)omsg, sizeof(*omsg), 0, |
579 | f0cbd3ec | bellard | (struct sockaddr *)&addr, sizeof(addr)); |
580 | f0cbd3ec | bellard | addr.sin_port = htons(518);
|
581 | f0cbd3ec | bellard | sendto(s, (char *)nmsg, sizeof(*nmsg), 0, |
582 | f0cbd3ec | bellard | (struct sockaddr *)&addr, sizeof(addr)); |
583 | 379ff53d | bellard | closesocket(s); |
584 | 3b46e624 | ths | |
585 | f0cbd3ec | bellard | OTOSIN(omsg, ctl_addr)->sin_port = temp_port; |
586 | f0cbd3ec | bellard | OTOSIN(nmsg, ctl_addr)->sin_port = temp_port; |
587 | f0cbd3ec | bellard | |
588 | f0cbd3ec | bellard | /* delete table entry */
|
589 | f0cbd3ec | bellard | if (so == req_tbl->udp_so) {
|
590 | f0cbd3ec | bellard | temp_req = req_tbl; |
591 | f0cbd3ec | bellard | req_tbl = req_tbl->next; |
592 | f0cbd3ec | bellard | free(temp_req); |
593 | f0cbd3ec | bellard | } else {
|
594 | f0cbd3ec | bellard | temp_req = req_tbl; |
595 | f0cbd3ec | bellard | for(req = req_tbl->next; req; req = req_next) {
|
596 | f0cbd3ec | bellard | req_next = req->next; |
597 | f0cbd3ec | bellard | if (so == req->udp_so) {
|
598 | f0cbd3ec | bellard | temp_req->next = req_next; |
599 | f0cbd3ec | bellard | free(req); |
600 | f0cbd3ec | bellard | break;
|
601 | f0cbd3ec | bellard | } else {
|
602 | f0cbd3ec | bellard | temp_req = req; |
603 | f0cbd3ec | bellard | } |
604 | f0cbd3ec | bellard | } |
605 | f0cbd3ec | bellard | } |
606 | f0cbd3ec | bellard | } |
607 | 3b46e624 | ths | |
608 | 3b46e624 | ths | return;
|
609 | f0cbd3ec | bellard | #endif
|
610 | 3b46e624 | ths | |
611 | 5fafdf24 | ths | case EMU_CUSEEME:
|
612 | 5fafdf24 | ths | |
613 | f0cbd3ec | bellard | /*
|
614 | f0cbd3ec | bellard | * Cu-SeeMe emulation.
|
615 | f0cbd3ec | bellard | * Hopefully the packet is more that 16 bytes long. We don't
|
616 | f0cbd3ec | bellard | * do any other tests, just replace the address and port
|
617 | f0cbd3ec | bellard | * fields.
|
618 | 5fafdf24 | ths | */
|
619 | f0cbd3ec | bellard | if (m->m_len >= sizeof (*cu_head)) { |
620 | f0cbd3ec | bellard | if (getsockname(so->s, (struct sockaddr *)&addr, &addrlen) < 0) |
621 | f0cbd3ec | bellard | return;
|
622 | f0cbd3ec | bellard | cu_head = mtod(m, struct cu_header *);
|
623 | 101c5935 | bellard | cu_head->s_port = addr.sin_port; |
624 | 51a36cb2 | bellard | cu_head->so_addr = our_addr.s_addr; |
625 | f0cbd3ec | bellard | } |
626 | 3b46e624 | ths | |
627 | f0cbd3ec | bellard | return;
|
628 | f0cbd3ec | bellard | } |
629 | f0cbd3ec | bellard | } |
630 | f0cbd3ec | bellard | |
631 | f0cbd3ec | bellard | struct socket *
|
632 | f0cbd3ec | bellard | udp_listen(port, laddr, lport, flags) |
633 | f0cbd3ec | bellard | u_int port; |
634 | f0cbd3ec | bellard | u_int32_t laddr; |
635 | f0cbd3ec | bellard | u_int lport; |
636 | f0cbd3ec | bellard | int flags;
|
637 | f0cbd3ec | bellard | { |
638 | f0cbd3ec | bellard | struct sockaddr_in addr;
|
639 | f0cbd3ec | bellard | struct socket *so;
|
640 | f0cbd3ec | bellard | int addrlen = sizeof(struct sockaddr_in), opt = 1; |
641 | 5fafdf24 | ths | |
642 | f0cbd3ec | bellard | if ((so = socreate()) == NULL) { |
643 | f0cbd3ec | bellard | free(so); |
644 | f0cbd3ec | bellard | return NULL; |
645 | f0cbd3ec | bellard | } |
646 | f0cbd3ec | bellard | so->s = socket(AF_INET,SOCK_DGRAM,0);
|
647 | f0cbd3ec | bellard | so->so_expire = curtime + SO_EXPIRE; |
648 | f0cbd3ec | bellard | insque(so,&udb); |
649 | f0cbd3ec | bellard | |
650 | f0cbd3ec | bellard | addr.sin_family = AF_INET; |
651 | f0cbd3ec | bellard | addr.sin_addr.s_addr = INADDR_ANY; |
652 | f0cbd3ec | bellard | addr.sin_port = port; |
653 | f0cbd3ec | bellard | |
654 | f0cbd3ec | bellard | if (bind(so->s,(struct sockaddr *)&addr, addrlen) < 0) { |
655 | f0cbd3ec | bellard | udp_detach(so); |
656 | f0cbd3ec | bellard | return NULL; |
657 | f0cbd3ec | bellard | } |
658 | f0cbd3ec | bellard | setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int)); |
659 | f0cbd3ec | bellard | /* setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int)); */
|
660 | 5fafdf24 | ths | |
661 | f0cbd3ec | bellard | getsockname(so->s,(struct sockaddr *)&addr,&addrlen);
|
662 | f0cbd3ec | bellard | so->so_fport = addr.sin_port; |
663 | f0cbd3ec | bellard | if (addr.sin_addr.s_addr == 0 || addr.sin_addr.s_addr == loopback_addr.s_addr) |
664 | 8dbca8dd | bellard | so->so_faddr = alias_addr; |
665 | f0cbd3ec | bellard | else
|
666 | f0cbd3ec | bellard | so->so_faddr = addr.sin_addr; |
667 | 5fafdf24 | ths | |
668 | f0cbd3ec | bellard | so->so_lport = lport; |
669 | f0cbd3ec | bellard | so->so_laddr.s_addr = laddr; |
670 | f0cbd3ec | bellard | if (flags != SS_FACCEPTONCE)
|
671 | f0cbd3ec | bellard | so->so_expire = 0;
|
672 | 5fafdf24 | ths | |
673 | f0cbd3ec | bellard | so->so_state = SS_ISFCONNECTED; |
674 | 5fafdf24 | ths | |
675 | f0cbd3ec | bellard | return so;
|
676 | f0cbd3ec | bellard | } |