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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 | 2f5f8996 | aliguori | * 3. Neither the name of the University nor the names of its contributors
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14 | f0cbd3ec | bellard | * may be used to endorse or promote products derived from this software
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15 | f0cbd3ec | bellard | * without specific prior written permission.
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16 | f0cbd3ec | bellard | *
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17 | f0cbd3ec | bellard | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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18 | f0cbd3ec | bellard | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | f0cbd3ec | bellard | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | f0cbd3ec | bellard | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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21 | f0cbd3ec | bellard | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | f0cbd3ec | bellard | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | f0cbd3ec | bellard | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | f0cbd3ec | bellard | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | f0cbd3ec | bellard | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | f0cbd3ec | bellard | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | f0cbd3ec | bellard | * SUCH DAMAGE.
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28 | f0cbd3ec | bellard | *
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29 | f0cbd3ec | bellard | * @(#)tcp_subr.c 8.1 (Berkeley) 6/10/93
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30 | f0cbd3ec | bellard | * tcp_subr.c,v 1.5 1994/10/08 22:39:58 phk Exp
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31 | f0cbd3ec | bellard | */
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32 | f0cbd3ec | bellard | |
33 | f0cbd3ec | bellard | /*
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34 | f0cbd3ec | bellard | * Changes and additions relating to SLiRP
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35 | f0cbd3ec | bellard | * Copyright (c) 1995 Danny Gasparovski.
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36 | 5fafdf24 | ths | *
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37 | 5fafdf24 | ths | * Please read the file COPYRIGHT for the
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38 | f0cbd3ec | bellard | * terms and conditions of the copyright.
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39 | f0cbd3ec | bellard | */
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40 | f0cbd3ec | bellard | |
41 | f0cbd3ec | bellard | #include <slirp.h> |
42 | f0cbd3ec | bellard | |
43 | f0cbd3ec | bellard | /* patchable/settable parameters for tcp */
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44 | 9634d903 | blueswir1 | /* Don't do rfc1323 performance enhancements */
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45 | 9634d903 | blueswir1 | #define TCP_DO_RFC1323 0 |
46 | f0cbd3ec | bellard | |
47 | f0cbd3ec | bellard | /*
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48 | f0cbd3ec | bellard | * Tcp initialization
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49 | f0cbd3ec | bellard | */
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50 | f0cbd3ec | bellard | void
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51 | 460fec67 | Jan Kiszka | tcp_init(Slirp *slirp) |
52 | f0cbd3ec | bellard | { |
53 | 460fec67 | Jan Kiszka | slirp->tcp_iss = 1; /* wrong */ |
54 | 460fec67 | Jan Kiszka | slirp->tcb.so_next = slirp->tcb.so_prev = &slirp->tcb; |
55 | 460fec67 | Jan Kiszka | slirp->tcp_last_so = &slirp->tcb; |
56 | f0cbd3ec | bellard | } |
57 | f0cbd3ec | bellard | |
58 | f0cbd3ec | bellard | /*
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59 | f0cbd3ec | bellard | * Create template to be used to send tcp packets on a connection.
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60 | f0cbd3ec | bellard | * Call after host entry created, fills
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61 | f0cbd3ec | bellard | * in a skeletal tcp/ip header, minimizing the amount of work
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62 | f0cbd3ec | bellard | * necessary when the connection is used.
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63 | f0cbd3ec | bellard | */
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64 | f0cbd3ec | bellard | void
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65 | 511d2b14 | blueswir1 | tcp_template(struct tcpcb *tp)
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66 | f0cbd3ec | bellard | { |
67 | f0cbd3ec | bellard | struct socket *so = tp->t_socket;
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68 | f0cbd3ec | bellard | register struct tcpiphdr *n = &tp->t_template; |
69 | f0cbd3ec | bellard | |
70 | 429d0a3d | blueswir1 | n->ti_mbuf = NULL;
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71 | f0cbd3ec | bellard | n->ti_x1 = 0;
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72 | f0cbd3ec | bellard | n->ti_pr = IPPROTO_TCP; |
73 | f0cbd3ec | bellard | n->ti_len = htons(sizeof (struct tcpiphdr) - sizeof (struct ip)); |
74 | f0cbd3ec | bellard | n->ti_src = so->so_faddr; |
75 | f0cbd3ec | bellard | n->ti_dst = so->so_laddr; |
76 | f0cbd3ec | bellard | n->ti_sport = so->so_fport; |
77 | f0cbd3ec | bellard | n->ti_dport = so->so_lport; |
78 | 5fafdf24 | ths | |
79 | f0cbd3ec | bellard | n->ti_seq = 0;
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80 | f0cbd3ec | bellard | n->ti_ack = 0;
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81 | f0cbd3ec | bellard | n->ti_x2 = 0;
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82 | f0cbd3ec | bellard | n->ti_off = 5;
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83 | f0cbd3ec | bellard | n->ti_flags = 0;
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84 | f0cbd3ec | bellard | n->ti_win = 0;
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85 | f0cbd3ec | bellard | n->ti_sum = 0;
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86 | f0cbd3ec | bellard | n->ti_urp = 0;
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87 | f0cbd3ec | bellard | } |
88 | f0cbd3ec | bellard | |
89 | f0cbd3ec | bellard | /*
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90 | f0cbd3ec | bellard | * Send a single message to the TCP at address specified by
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91 | f0cbd3ec | bellard | * the given TCP/IP header. If m == 0, then we make a copy
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92 | f0cbd3ec | bellard | * of the tcpiphdr at ti and send directly to the addressed host.
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93 | f0cbd3ec | bellard | * This is used to force keep alive messages out using the TCP
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94 | f0cbd3ec | bellard | * template for a connection tp->t_template. If flags are given
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95 | f0cbd3ec | bellard | * then we send a message back to the TCP which originated the
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96 | f0cbd3ec | bellard | * segment ti, and discard the mbuf containing it and any other
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97 | f0cbd3ec | bellard | * attached mbufs.
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98 | f0cbd3ec | bellard | *
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99 | f0cbd3ec | bellard | * In any case the ack and sequence number of the transmitted
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100 | f0cbd3ec | bellard | * segment are as specified by the parameters.
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101 | f0cbd3ec | bellard | */
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102 | f0cbd3ec | bellard | void
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103 | 511d2b14 | blueswir1 | tcp_respond(struct tcpcb *tp, struct tcpiphdr *ti, struct mbuf *m, |
104 | 511d2b14 | blueswir1 | tcp_seq ack, tcp_seq seq, int flags)
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105 | f0cbd3ec | bellard | { |
106 | f0cbd3ec | bellard | register int tlen; |
107 | f0cbd3ec | bellard | int win = 0; |
108 | f0cbd3ec | bellard | |
109 | f0cbd3ec | bellard | DEBUG_CALL("tcp_respond");
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110 | f0cbd3ec | bellard | DEBUG_ARG("tp = %lx", (long)tp); |
111 | f0cbd3ec | bellard | DEBUG_ARG("ti = %lx", (long)ti); |
112 | f0cbd3ec | bellard | DEBUG_ARG("m = %lx", (long)m); |
113 | f0cbd3ec | bellard | DEBUG_ARG("ack = %u", ack);
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114 | f0cbd3ec | bellard | DEBUG_ARG("seq = %u", seq);
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115 | f0cbd3ec | bellard | DEBUG_ARG("flags = %x", flags);
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116 | 5fafdf24 | ths | |
117 | f0cbd3ec | bellard | if (tp)
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118 | f0cbd3ec | bellard | win = sbspace(&tp->t_socket->so_rcv); |
119 | 511d2b14 | blueswir1 | if (m == NULL) { |
120 | 460fec67 | Jan Kiszka | if ((m = m_get(tp->t_socket->slirp)) == NULL) |
121 | f0cbd3ec | bellard | return;
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122 | f0cbd3ec | bellard | tlen = 0;
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123 | 9634d903 | blueswir1 | m->m_data += IF_MAXLINKHDR; |
124 | f0cbd3ec | bellard | *mtod(m, struct tcpiphdr *) = *ti;
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125 | f0cbd3ec | bellard | ti = mtod(m, struct tcpiphdr *);
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126 | f0cbd3ec | bellard | flags = TH_ACK; |
127 | f0cbd3ec | bellard | } else {
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128 | 5fafdf24 | ths | /*
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129 | f0cbd3ec | bellard | * ti points into m so the next line is just making
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130 | f0cbd3ec | bellard | * the mbuf point to ti
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131 | f0cbd3ec | bellard | */
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132 | f0cbd3ec | bellard | m->m_data = (caddr_t)ti; |
133 | 3b46e624 | ths | |
134 | f0cbd3ec | bellard | m->m_len = sizeof (struct tcpiphdr); |
135 | f0cbd3ec | bellard | tlen = 0;
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136 | f0cbd3ec | bellard | #define xchg(a,b,type) { type t; t=a; a=b; b=t; }
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137 | f0cbd3ec | bellard | xchg(ti->ti_dst.s_addr, ti->ti_src.s_addr, u_int32_t); |
138 | f0cbd3ec | bellard | xchg(ti->ti_dport, ti->ti_sport, u_int16_t); |
139 | f0cbd3ec | bellard | #undef xchg
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140 | f0cbd3ec | bellard | } |
141 | f0cbd3ec | bellard | ti->ti_len = htons((u_short)(sizeof (struct tcphdr) + tlen)); |
142 | f0cbd3ec | bellard | tlen += sizeof (struct tcpiphdr); |
143 | f0cbd3ec | bellard | m->m_len = tlen; |
144 | f0cbd3ec | bellard | |
145 | 511d2b14 | blueswir1 | ti->ti_mbuf = NULL;
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146 | f0cbd3ec | bellard | ti->ti_x1 = 0;
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147 | f0cbd3ec | bellard | ti->ti_seq = htonl(seq); |
148 | f0cbd3ec | bellard | ti->ti_ack = htonl(ack); |
149 | f0cbd3ec | bellard | ti->ti_x2 = 0;
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150 | f0cbd3ec | bellard | ti->ti_off = sizeof (struct tcphdr) >> 2; |
151 | f0cbd3ec | bellard | ti->ti_flags = flags; |
152 | f0cbd3ec | bellard | if (tp)
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153 | f0cbd3ec | bellard | ti->ti_win = htons((u_int16_t) (win >> tp->rcv_scale)); |
154 | f0cbd3ec | bellard | else
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155 | f0cbd3ec | bellard | ti->ti_win = htons((u_int16_t)win); |
156 | f0cbd3ec | bellard | ti->ti_urp = 0;
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157 | f0cbd3ec | bellard | ti->ti_sum = 0;
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158 | f0cbd3ec | bellard | ti->ti_sum = cksum(m, tlen); |
159 | f0cbd3ec | bellard | ((struct ip *)ti)->ip_len = tlen;
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160 | f0cbd3ec | bellard | |
161 | 5fafdf24 | ths | if(flags & TH_RST)
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162 | f0cbd3ec | bellard | ((struct ip *)ti)->ip_ttl = MAXTTL;
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163 | 5fafdf24 | ths | else
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164 | 9634d903 | blueswir1 | ((struct ip *)ti)->ip_ttl = IPDEFTTL;
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165 | 5fafdf24 | ths | |
166 | f0cbd3ec | bellard | (void) ip_output((struct socket *)0, m); |
167 | f0cbd3ec | bellard | } |
168 | f0cbd3ec | bellard | |
169 | f0cbd3ec | bellard | /*
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170 | f0cbd3ec | bellard | * Create a new TCP control block, making an
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171 | f0cbd3ec | bellard | * empty reassembly queue and hooking it to the argument
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172 | f0cbd3ec | bellard | * protocol control block.
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173 | f0cbd3ec | bellard | */
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174 | f0cbd3ec | bellard | struct tcpcb *
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175 | 511d2b14 | blueswir1 | tcp_newtcpcb(struct socket *so)
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176 | f0cbd3ec | bellard | { |
177 | f0cbd3ec | bellard | register struct tcpcb *tp; |
178 | 5fafdf24 | ths | |
179 | f0cbd3ec | bellard | tp = (struct tcpcb *)malloc(sizeof(*tp)); |
180 | f0cbd3ec | bellard | if (tp == NULL) |
181 | f0cbd3ec | bellard | return ((struct tcpcb *)0); |
182 | 5fafdf24 | ths | |
183 | f0cbd3ec | bellard | memset((char *) tp, 0, sizeof(struct tcpcb)); |
184 | 429d0a3d | blueswir1 | tp->seg_next = tp->seg_prev = (struct tcpiphdr*)tp;
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185 | 9634d903 | blueswir1 | tp->t_maxseg = TCP_MSS; |
186 | 5fafdf24 | ths | |
187 | 9634d903 | blueswir1 | tp->t_flags = TCP_DO_RFC1323 ? (TF_REQ_SCALE|TF_REQ_TSTMP) : 0;
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188 | f0cbd3ec | bellard | tp->t_socket = so; |
189 | 5fafdf24 | ths | |
190 | f0cbd3ec | bellard | /*
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191 | f0cbd3ec | bellard | * Init srtt to TCPTV_SRTTBASE (0), so we can tell that we have no
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192 | f0cbd3ec | bellard | * rtt estimate. Set rttvar so that srtt + 2 * rttvar gives
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193 | f0cbd3ec | bellard | * reasonable initial retransmit time.
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194 | f0cbd3ec | bellard | */
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195 | f0cbd3ec | bellard | tp->t_srtt = TCPTV_SRTTBASE; |
196 | 9634d903 | blueswir1 | tp->t_rttvar = TCPTV_SRTTDFLT << 2;
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197 | f0cbd3ec | bellard | tp->t_rttmin = TCPTV_MIN; |
198 | f0cbd3ec | bellard | |
199 | 5fafdf24 | ths | TCPT_RANGESET(tp->t_rxtcur, |
200 | f0cbd3ec | bellard | ((TCPTV_SRTTBASE >> 2) + (TCPTV_SRTTDFLT << 2)) >> 1, |
201 | f0cbd3ec | bellard | TCPTV_MIN, TCPTV_REXMTMAX); |
202 | f0cbd3ec | bellard | |
203 | f0cbd3ec | bellard | tp->snd_cwnd = TCP_MAXWIN << TCP_MAX_WINSHIFT; |
204 | f0cbd3ec | bellard | tp->snd_ssthresh = TCP_MAXWIN << TCP_MAX_WINSHIFT; |
205 | f0cbd3ec | bellard | tp->t_state = TCPS_CLOSED; |
206 | 5fafdf24 | ths | |
207 | f0cbd3ec | bellard | so->so_tcpcb = tp; |
208 | f0cbd3ec | bellard | |
209 | f0cbd3ec | bellard | return (tp);
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210 | f0cbd3ec | bellard | } |
211 | f0cbd3ec | bellard | |
212 | f0cbd3ec | bellard | /*
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213 | f0cbd3ec | bellard | * Drop a TCP connection, reporting
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214 | f0cbd3ec | bellard | * the specified error. If connection is synchronized,
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215 | f0cbd3ec | bellard | * then send a RST to peer.
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216 | f0cbd3ec | bellard | */
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217 | 5fafdf24 | ths | struct tcpcb *tcp_drop(struct tcpcb *tp, int err) |
218 | f0cbd3ec | bellard | { |
219 | f0cbd3ec | bellard | DEBUG_CALL("tcp_drop");
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220 | f0cbd3ec | bellard | DEBUG_ARG("tp = %lx", (long)tp); |
221 | f0cbd3ec | bellard | DEBUG_ARG("errno = %d", errno);
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222 | 5fafdf24 | ths | |
223 | f0cbd3ec | bellard | if (TCPS_HAVERCVDSYN(tp->t_state)) {
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224 | f0cbd3ec | bellard | tp->t_state = TCPS_CLOSED; |
225 | f0cbd3ec | bellard | (void) tcp_output(tp);
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226 | 0fe6a7f2 | Jan Kiszka | } |
227 | f0cbd3ec | bellard | return (tcp_close(tp));
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228 | f0cbd3ec | bellard | } |
229 | f0cbd3ec | bellard | |
230 | f0cbd3ec | bellard | /*
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231 | f0cbd3ec | bellard | * Close a TCP control block:
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232 | f0cbd3ec | bellard | * discard all space held by the tcp
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233 | f0cbd3ec | bellard | * discard internet protocol block
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234 | f0cbd3ec | bellard | * wake up any sleepers
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235 | f0cbd3ec | bellard | */
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236 | f0cbd3ec | bellard | struct tcpcb *
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237 | 511d2b14 | blueswir1 | tcp_close(struct tcpcb *tp)
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238 | f0cbd3ec | bellard | { |
239 | f0cbd3ec | bellard | register struct tcpiphdr *t; |
240 | f0cbd3ec | bellard | struct socket *so = tp->t_socket;
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241 | 460fec67 | Jan Kiszka | Slirp *slirp = so->slirp; |
242 | f0cbd3ec | bellard | register struct mbuf *m; |
243 | f0cbd3ec | bellard | |
244 | f0cbd3ec | bellard | DEBUG_CALL("tcp_close");
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245 | f0cbd3ec | bellard | DEBUG_ARG("tp = %lx", (long )tp); |
246 | 5fafdf24 | ths | |
247 | f0cbd3ec | bellard | /* free the reassembly queue, if any */
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248 | 429d0a3d | blueswir1 | t = tcpfrag_list_first(tp); |
249 | 429d0a3d | blueswir1 | while (!tcpfrag_list_end(t, tp)) {
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250 | 429d0a3d | blueswir1 | t = tcpiphdr_next(t); |
251 | 429d0a3d | blueswir1 | m = tcpiphdr_prev(t)->ti_mbuf; |
252 | 429d0a3d | blueswir1 | remque(tcpiphdr2qlink(tcpiphdr_prev(t))); |
253 | f0cbd3ec | bellard | m_freem(m); |
254 | f0cbd3ec | bellard | } |
255 | f0cbd3ec | bellard | free(tp); |
256 | 511d2b14 | blueswir1 | so->so_tcpcb = NULL;
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257 | f0cbd3ec | bellard | /* clobber input socket cache if we're closing the cached connection */
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258 | 460fec67 | Jan Kiszka | if (so == slirp->tcp_last_so)
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259 | 460fec67 | Jan Kiszka | slirp->tcp_last_so = &slirp->tcb; |
260 | 379ff53d | bellard | closesocket(so->s); |
261 | f0cbd3ec | bellard | sbfree(&so->so_rcv); |
262 | f0cbd3ec | bellard | sbfree(&so->so_snd); |
263 | f0cbd3ec | bellard | sofree(so); |
264 | f0cbd3ec | bellard | return ((struct tcpcb *)0); |
265 | f0cbd3ec | bellard | } |
266 | f0cbd3ec | bellard | |
267 | f0cbd3ec | bellard | /*
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268 | f0cbd3ec | bellard | * TCP protocol interface to socket abstraction.
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269 | f0cbd3ec | bellard | */
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270 | f0cbd3ec | bellard | |
271 | f0cbd3ec | bellard | /*
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272 | f0cbd3ec | bellard | * User issued close, and wish to trail through shutdown states:
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273 | f0cbd3ec | bellard | * if never received SYN, just forget it. If got a SYN from peer,
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274 | f0cbd3ec | bellard | * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN.
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275 | f0cbd3ec | bellard | * If already got a FIN from peer, then almost done; go to LAST_ACK
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276 | f0cbd3ec | bellard | * state. In all other cases, have already sent FIN to peer (e.g.
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277 | f0cbd3ec | bellard | * after PRU_SHUTDOWN), and just have to play tedious game waiting
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278 | f0cbd3ec | bellard | * for peer to send FIN or not respond to keep-alives, etc.
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279 | f0cbd3ec | bellard | * We can let the user exit from the close as soon as the FIN is acked.
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280 | f0cbd3ec | bellard | */
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281 | f0cbd3ec | bellard | void
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282 | 511d2b14 | blueswir1 | tcp_sockclosed(struct tcpcb *tp)
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283 | f0cbd3ec | bellard | { |
284 | f0cbd3ec | bellard | |
285 | f0cbd3ec | bellard | DEBUG_CALL("tcp_sockclosed");
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286 | f0cbd3ec | bellard | DEBUG_ARG("tp = %lx", (long)tp); |
287 | 5fafdf24 | ths | |
288 | f0cbd3ec | bellard | switch (tp->t_state) {
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289 | f0cbd3ec | bellard | |
290 | f0cbd3ec | bellard | case TCPS_CLOSED:
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291 | f0cbd3ec | bellard | case TCPS_LISTEN:
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292 | f0cbd3ec | bellard | case TCPS_SYN_SENT:
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293 | f0cbd3ec | bellard | tp->t_state = TCPS_CLOSED; |
294 | f0cbd3ec | bellard | tp = tcp_close(tp); |
295 | f0cbd3ec | bellard | break;
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296 | f0cbd3ec | bellard | |
297 | f0cbd3ec | bellard | case TCPS_SYN_RECEIVED:
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298 | f0cbd3ec | bellard | case TCPS_ESTABLISHED:
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299 | f0cbd3ec | bellard | tp->t_state = TCPS_FIN_WAIT_1; |
300 | f0cbd3ec | bellard | break;
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301 | f0cbd3ec | bellard | |
302 | f0cbd3ec | bellard | case TCPS_CLOSE_WAIT:
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303 | f0cbd3ec | bellard | tp->t_state = TCPS_LAST_ACK; |
304 | f0cbd3ec | bellard | break;
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305 | f0cbd3ec | bellard | } |
306 | f0cbd3ec | bellard | if (tp)
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307 | f0cbd3ec | bellard | tcp_output(tp); |
308 | f0cbd3ec | bellard | } |
309 | f0cbd3ec | bellard | |
310 | 5fafdf24 | ths | /*
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311 | f0cbd3ec | bellard | * Connect to a host on the Internet
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312 | f0cbd3ec | bellard | * Called by tcp_input
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313 | f0cbd3ec | bellard | * Only do a connect, the tcp fields will be set in tcp_input
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314 | f0cbd3ec | bellard | * return 0 if there's a result of the connect,
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315 | f0cbd3ec | bellard | * else return -1 means we're still connecting
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316 | f0cbd3ec | bellard | * The return value is almost always -1 since the socket is
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317 | 5fafdf24 | ths | * nonblocking. Connect returns after the SYN is sent, and does
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318 | f0cbd3ec | bellard | * not wait for ACK+SYN.
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319 | f0cbd3ec | bellard | */
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320 | 511d2b14 | blueswir1 | int tcp_fconnect(struct socket *so) |
321 | f0cbd3ec | bellard | { |
322 | 460fec67 | Jan Kiszka | Slirp *slirp = so->slirp; |
323 | f0cbd3ec | bellard | int ret=0; |
324 | 3b46e624 | ths | |
325 | f0cbd3ec | bellard | DEBUG_CALL("tcp_fconnect");
|
326 | f0cbd3ec | bellard | DEBUG_ARG("so = %lx", (long )so); |
327 | f0cbd3ec | bellard | |
328 | f0cbd3ec | bellard | if( (ret=so->s=socket(AF_INET,SOCK_STREAM,0)) >= 0) { |
329 | f0cbd3ec | bellard | int opt, s=so->s;
|
330 | f0cbd3ec | bellard | struct sockaddr_in addr;
|
331 | f0cbd3ec | bellard | |
332 | f0cbd3ec | bellard | fd_nonblock(s); |
333 | f0cbd3ec | bellard | opt = 1;
|
334 | f0cbd3ec | bellard | setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(opt )); |
335 | f0cbd3ec | bellard | opt = 1;
|
336 | f0cbd3ec | bellard | setsockopt(s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(opt )); |
337 | 3b46e624 | ths | |
338 | f0cbd3ec | bellard | addr.sin_family = AF_INET; |
339 | 460fec67 | Jan Kiszka | if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) ==
|
340 | 460fec67 | Jan Kiszka | slirp->vnetwork_addr.s_addr) { |
341 | f0cbd3ec | bellard | /* It's an alias */
|
342 | 460fec67 | Jan Kiszka | if (so->so_faddr.s_addr == slirp->vnameserver_addr.s_addr) {
|
343 | df7a86ed | Ed Swierk | if (get_dns_addr(&addr.sin_addr) < 0) |
344 | df7a86ed | Ed Swierk | addr.sin_addr = loopback_addr; |
345 | a13a4126 | Jan Kiszka | } else {
|
346 | f0cbd3ec | bellard | addr.sin_addr = loopback_addr; |
347 | f0cbd3ec | bellard | } |
348 | f0cbd3ec | bellard | } else
|
349 | f0cbd3ec | bellard | addr.sin_addr = so->so_faddr; |
350 | f0cbd3ec | bellard | addr.sin_port = so->so_fport; |
351 | 3b46e624 | ths | |
352 | f0cbd3ec | bellard | DEBUG_MISC((dfd, " connect()ing, addr.sin_port=%d, "
|
353 | 5fafdf24 | ths | "addr.sin_addr.s_addr=%.16s\n",
|
354 | f0cbd3ec | bellard | ntohs(addr.sin_port), inet_ntoa(addr.sin_addr))); |
355 | f0cbd3ec | bellard | /* We don't care what port we get */
|
356 | f0cbd3ec | bellard | ret = connect(s,(struct sockaddr *)&addr,sizeof (addr)); |
357 | 3b46e624 | ths | |
358 | f0cbd3ec | bellard | /*
|
359 | f0cbd3ec | bellard | * If it's not in progress, it failed, so we just return 0,
|
360 | f0cbd3ec | bellard | * without clearing SS_NOFDREF
|
361 | f0cbd3ec | bellard | */
|
362 | f0cbd3ec | bellard | soisfconnecting(so); |
363 | f0cbd3ec | bellard | } |
364 | f0cbd3ec | bellard | |
365 | f0cbd3ec | bellard | return(ret);
|
366 | f0cbd3ec | bellard | } |
367 | f0cbd3ec | bellard | |
368 | f0cbd3ec | bellard | /*
|
369 | f0cbd3ec | bellard | * Accept the socket and connect to the local-host
|
370 | 5fafdf24 | ths | *
|
371 | f0cbd3ec | bellard | * We have a problem. The correct thing to do would be
|
372 | f0cbd3ec | bellard | * to first connect to the local-host, and only if the
|
373 | f0cbd3ec | bellard | * connection is accepted, then do an accept() here.
|
374 | 5fafdf24 | ths | * But, a) we need to know who's trying to connect
|
375 | f0cbd3ec | bellard | * to the socket to be able to SYN the local-host, and
|
376 | f0cbd3ec | bellard | * b) we are already connected to the foreign host by
|
377 | f0cbd3ec | bellard | * the time it gets to accept(), so... We simply accept
|
378 | f0cbd3ec | bellard | * here and SYN the local-host.
|
379 | 5fafdf24 | ths | */
|
380 | f0cbd3ec | bellard | void
|
381 | 511d2b14 | blueswir1 | tcp_connect(struct socket *inso)
|
382 | f0cbd3ec | bellard | { |
383 | 460fec67 | Jan Kiszka | Slirp *slirp = inso->slirp; |
384 | f0cbd3ec | bellard | struct socket *so;
|
385 | f0cbd3ec | bellard | struct sockaddr_in addr;
|
386 | b55266b5 | blueswir1 | socklen_t addrlen = sizeof(struct sockaddr_in); |
387 | f0cbd3ec | bellard | struct tcpcb *tp;
|
388 | f0cbd3ec | bellard | int s, opt;
|
389 | f0cbd3ec | bellard | |
390 | f0cbd3ec | bellard | DEBUG_CALL("tcp_connect");
|
391 | f0cbd3ec | bellard | DEBUG_ARG("inso = %lx", (long)inso); |
392 | 5fafdf24 | ths | |
393 | f0cbd3ec | bellard | /*
|
394 | f0cbd3ec | bellard | * If it's an SS_ACCEPTONCE socket, no need to socreate()
|
395 | f0cbd3ec | bellard | * another socket, just use the accept() socket.
|
396 | f0cbd3ec | bellard | */
|
397 | f0cbd3ec | bellard | if (inso->so_state & SS_FACCEPTONCE) {
|
398 | f0cbd3ec | bellard | /* FACCEPTONCE already have a tcpcb */
|
399 | f0cbd3ec | bellard | so = inso; |
400 | f0cbd3ec | bellard | } else {
|
401 | 460fec67 | Jan Kiszka | if ((so = socreate(slirp)) == NULL) { |
402 | f0cbd3ec | bellard | /* If it failed, get rid of the pending connection */
|
403 | 379ff53d | bellard | closesocket(accept(inso->s,(struct sockaddr *)&addr,&addrlen));
|
404 | f0cbd3ec | bellard | return;
|
405 | f0cbd3ec | bellard | } |
406 | f0cbd3ec | bellard | if (tcp_attach(so) < 0) { |
407 | f0cbd3ec | bellard | free(so); /* NOT sofree */
|
408 | f0cbd3ec | bellard | return;
|
409 | f0cbd3ec | bellard | } |
410 | f0cbd3ec | bellard | so->so_laddr = inso->so_laddr; |
411 | f0cbd3ec | bellard | so->so_lport = inso->so_lport; |
412 | f0cbd3ec | bellard | } |
413 | 5fafdf24 | ths | |
414 | f0cbd3ec | bellard | (void) tcp_mss(sototcpcb(so), 0); |
415 | f0cbd3ec | bellard | |
416 | f0cbd3ec | bellard | if ((s = accept(inso->s,(struct sockaddr *)&addr,&addrlen)) < 0) { |
417 | f0cbd3ec | bellard | tcp_close(sototcpcb(so)); /* This will sofree() as well */
|
418 | f0cbd3ec | bellard | return;
|
419 | f0cbd3ec | bellard | } |
420 | f0cbd3ec | bellard | fd_nonblock(s); |
421 | f0cbd3ec | bellard | opt = 1;
|
422 | f0cbd3ec | bellard | setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int)); |
423 | f0cbd3ec | bellard | opt = 1;
|
424 | f0cbd3ec | bellard | setsockopt(s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int)); |
425 | eaf7e70b | ths | opt = 1;
|
426 | eaf7e70b | ths | setsockopt(s,IPPROTO_TCP,TCP_NODELAY,(char *)&opt,sizeof(int)); |
427 | 5fafdf24 | ths | |
428 | f0cbd3ec | bellard | so->so_fport = addr.sin_port; |
429 | f0cbd3ec | bellard | so->so_faddr = addr.sin_addr; |
430 | f0cbd3ec | bellard | /* Translate connections from localhost to the real hostname */
|
431 | f0cbd3ec | bellard | if (so->so_faddr.s_addr == 0 || so->so_faddr.s_addr == loopback_addr.s_addr) |
432 | 460fec67 | Jan Kiszka | so->so_faddr = slirp->vhost_addr; |
433 | 5fafdf24 | ths | |
434 | f0cbd3ec | bellard | /* Close the accept() socket, set right state */
|
435 | f0cbd3ec | bellard | if (inso->so_state & SS_FACCEPTONCE) {
|
436 | 379ff53d | bellard | closesocket(so->s); /* If we only accept once, close the accept() socket */
|
437 | f0cbd3ec | bellard | so->so_state = SS_NOFDREF; /* Don't select it yet, even though we have an FD */
|
438 | f0cbd3ec | bellard | /* if it's not FACCEPTONCE, it's already NOFDREF */
|
439 | f0cbd3ec | bellard | } |
440 | f0cbd3ec | bellard | so->s = s; |
441 | 4a82347a | Jan Kiszka | so->so_state |= SS_INCOMING; |
442 | 5fafdf24 | ths | |
443 | f0cbd3ec | bellard | so->so_iptos = tcp_tos(so); |
444 | f0cbd3ec | bellard | tp = sototcpcb(so); |
445 | f0cbd3ec | bellard | |
446 | f0cbd3ec | bellard | tcp_template(tp); |
447 | 5fafdf24 | ths | |
448 | f0cbd3ec | bellard | tp->t_state = TCPS_SYN_SENT; |
449 | f0cbd3ec | bellard | tp->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT; |
450 | 460fec67 | Jan Kiszka | tp->iss = slirp->tcp_iss; |
451 | 460fec67 | Jan Kiszka | slirp->tcp_iss += TCP_ISSINCR/2;
|
452 | f0cbd3ec | bellard | tcp_sendseqinit(tp); |
453 | f0cbd3ec | bellard | tcp_output(tp); |
454 | f0cbd3ec | bellard | } |
455 | f0cbd3ec | bellard | |
456 | f0cbd3ec | bellard | /*
|
457 | f0cbd3ec | bellard | * Attach a TCPCB to a socket.
|
458 | f0cbd3ec | bellard | */
|
459 | f0cbd3ec | bellard | int
|
460 | 511d2b14 | blueswir1 | tcp_attach(struct socket *so)
|
461 | f0cbd3ec | bellard | { |
462 | f0cbd3ec | bellard | if ((so->so_tcpcb = tcp_newtcpcb(so)) == NULL) |
463 | f0cbd3ec | bellard | return -1; |
464 | 5fafdf24 | ths | |
465 | 460fec67 | Jan Kiszka | insque(so, &so->slirp->tcb); |
466 | f0cbd3ec | bellard | |
467 | f0cbd3ec | bellard | return 0; |
468 | f0cbd3ec | bellard | } |
469 | f0cbd3ec | bellard | |
470 | f0cbd3ec | bellard | /*
|
471 | f0cbd3ec | bellard | * Set the socket's type of service field
|
472 | f0cbd3ec | bellard | */
|
473 | 9634d903 | blueswir1 | static const struct tos_t tcptos[] = { |
474 | f0cbd3ec | bellard | {0, 20, IPTOS_THROUGHPUT, 0}, /* ftp data */ |
475 | f0cbd3ec | bellard | {21, 21, IPTOS_LOWDELAY, EMU_FTP}, /* ftp control */ |
476 | f0cbd3ec | bellard | {0, 23, IPTOS_LOWDELAY, 0}, /* telnet */ |
477 | f0cbd3ec | bellard | {0, 80, IPTOS_THROUGHPUT, 0}, /* WWW */ |
478 | f0cbd3ec | bellard | {0, 513, IPTOS_LOWDELAY, EMU_RLOGIN|EMU_NOCONNECT}, /* rlogin */ |
479 | f0cbd3ec | bellard | {0, 514, IPTOS_LOWDELAY, EMU_RSH|EMU_NOCONNECT}, /* shell */ |
480 | f0cbd3ec | bellard | {0, 544, IPTOS_LOWDELAY, EMU_KSH}, /* kshell */ |
481 | f0cbd3ec | bellard | {0, 543, IPTOS_LOWDELAY, 0}, /* klogin */ |
482 | f0cbd3ec | bellard | {0, 6667, IPTOS_THROUGHPUT, EMU_IRC}, /* IRC */ |
483 | f0cbd3ec | bellard | {0, 6668, IPTOS_THROUGHPUT, EMU_IRC}, /* IRC undernet */ |
484 | f0cbd3ec | bellard | {0, 7070, IPTOS_LOWDELAY, EMU_REALAUDIO }, /* RealAudio control */ |
485 | f0cbd3ec | bellard | {0, 113, IPTOS_LOWDELAY, EMU_IDENT }, /* identd protocol */ |
486 | f0cbd3ec | bellard | {0, 0, 0, 0} |
487 | f0cbd3ec | bellard | }; |
488 | f0cbd3ec | bellard | |
489 | 0d62c4cf | Jan Kiszka | static struct emu_t *tcpemu = NULL; |
490 | 3b46e624 | ths | |
491 | f0cbd3ec | bellard | /*
|
492 | f0cbd3ec | bellard | * Return TOS according to the above table
|
493 | f0cbd3ec | bellard | */
|
494 | f0cbd3ec | bellard | u_int8_t |
495 | 511d2b14 | blueswir1 | tcp_tos(struct socket *so)
|
496 | f0cbd3ec | bellard | { |
497 | f0cbd3ec | bellard | int i = 0; |
498 | f0cbd3ec | bellard | struct emu_t *emup;
|
499 | 5fafdf24 | ths | |
500 | f0cbd3ec | bellard | while(tcptos[i].tos) {
|
501 | f0cbd3ec | bellard | if ((tcptos[i].fport && (ntohs(so->so_fport) == tcptos[i].fport)) ||
|
502 | f0cbd3ec | bellard | (tcptos[i].lport && (ntohs(so->so_lport) == tcptos[i].lport))) { |
503 | f0cbd3ec | bellard | so->so_emu = tcptos[i].emu; |
504 | f0cbd3ec | bellard | return tcptos[i].tos;
|
505 | f0cbd3ec | bellard | } |
506 | f0cbd3ec | bellard | i++; |
507 | f0cbd3ec | bellard | } |
508 | 5fafdf24 | ths | |
509 | f0cbd3ec | bellard | /* Nope, lets see if there's a user-added one */
|
510 | f0cbd3ec | bellard | for (emup = tcpemu; emup; emup = emup->next) {
|
511 | f0cbd3ec | bellard | if ((emup->fport && (ntohs(so->so_fport) == emup->fport)) ||
|
512 | f0cbd3ec | bellard | (emup->lport && (ntohs(so->so_lport) == emup->lport))) { |
513 | f0cbd3ec | bellard | so->so_emu = emup->emu; |
514 | f0cbd3ec | bellard | return emup->tos;
|
515 | f0cbd3ec | bellard | } |
516 | f0cbd3ec | bellard | } |
517 | 5fafdf24 | ths | |
518 | f0cbd3ec | bellard | return 0; |
519 | f0cbd3ec | bellard | } |
520 | f0cbd3ec | bellard | |
521 | f0cbd3ec | bellard | /*
|
522 | f0cbd3ec | bellard | * Emulate programs that try and connect to us
|
523 | f0cbd3ec | bellard | * This includes ftp (the data connection is
|
524 | f0cbd3ec | bellard | * initiated by the server) and IRC (DCC CHAT and
|
525 | f0cbd3ec | bellard | * DCC SEND) for now
|
526 | 5fafdf24 | ths | *
|
527 | f0cbd3ec | bellard | * NOTE: It's possible to crash SLiRP by sending it
|
528 | f0cbd3ec | bellard | * unstandard strings to emulate... if this is a problem,
|
529 | f0cbd3ec | bellard | * more checks are needed here
|
530 | f0cbd3ec | bellard | *
|
531 | f0cbd3ec | bellard | * XXX Assumes the whole command came in one packet
|
532 | 3b46e624 | ths | *
|
533 | f0cbd3ec | bellard | * XXX Some ftp clients will have their TOS set to
|
534 | f0cbd3ec | bellard | * LOWDELAY and so Nagel will kick in. Because of this,
|
535 | f0cbd3ec | bellard | * we'll get the first letter, followed by the rest, so
|
536 | f0cbd3ec | bellard | * we simply scan for ORT instead of PORT...
|
537 | f0cbd3ec | bellard | * DCC doesn't have this problem because there's other stuff
|
538 | f0cbd3ec | bellard | * in the packet before the DCC command.
|
539 | 5fafdf24 | ths | *
|
540 | 5fafdf24 | ths | * Return 1 if the mbuf m is still valid and should be
|
541 | f0cbd3ec | bellard | * sbappend()ed
|
542 | 5fafdf24 | ths | *
|
543 | f0cbd3ec | bellard | * NOTE: if you return 0 you MUST m_free() the mbuf!
|
544 | f0cbd3ec | bellard | */
|
545 | f0cbd3ec | bellard | int
|
546 | 511d2b14 | blueswir1 | tcp_emu(struct socket *so, struct mbuf *m) |
547 | f0cbd3ec | bellard | { |
548 | 460fec67 | Jan Kiszka | Slirp *slirp = so->slirp; |
549 | f0cbd3ec | bellard | u_int n1, n2, n3, n4, n5, n6; |
550 | 363a37d5 | blueswir1 | char buff[257]; |
551 | f0cbd3ec | bellard | u_int32_t laddr; |
552 | f0cbd3ec | bellard | u_int lport; |
553 | f0cbd3ec | bellard | char *bptr;
|
554 | 5fafdf24 | ths | |
555 | f0cbd3ec | bellard | DEBUG_CALL("tcp_emu");
|
556 | f0cbd3ec | bellard | DEBUG_ARG("so = %lx", (long)so); |
557 | f0cbd3ec | bellard | DEBUG_ARG("m = %lx", (long)m); |
558 | 5fafdf24 | ths | |
559 | f0cbd3ec | bellard | switch(so->so_emu) {
|
560 | f0cbd3ec | bellard | int x, i;
|
561 | 3b46e624 | ths | |
562 | f0cbd3ec | bellard | case EMU_IDENT:
|
563 | f0cbd3ec | bellard | /*
|
564 | f0cbd3ec | bellard | * Identification protocol as per rfc-1413
|
565 | f0cbd3ec | bellard | */
|
566 | 3b46e624 | ths | |
567 | f0cbd3ec | bellard | { |
568 | f0cbd3ec | bellard | struct socket *tmpso;
|
569 | f0cbd3ec | bellard | struct sockaddr_in addr;
|
570 | b55266b5 | blueswir1 | socklen_t addrlen = sizeof(struct sockaddr_in); |
571 | f0cbd3ec | bellard | struct sbuf *so_rcv = &so->so_rcv;
|
572 | 3b46e624 | ths | |
573 | f0cbd3ec | bellard | memcpy(so_rcv->sb_wptr, m->m_data, m->m_len); |
574 | f0cbd3ec | bellard | so_rcv->sb_wptr += m->m_len; |
575 | f0cbd3ec | bellard | so_rcv->sb_rptr += m->m_len; |
576 | f0cbd3ec | bellard | m->m_data[m->m_len] = 0; /* NULL terminate */ |
577 | f0cbd3ec | bellard | if (strchr(m->m_data, '\r') || strchr(m->m_data, '\n')) { |
578 | 9634d903 | blueswir1 | if (sscanf(so_rcv->sb_data, "%u%*[ ,]%u", &n1, &n2) == 2) { |
579 | f0cbd3ec | bellard | HTONS(n1); |
580 | f0cbd3ec | bellard | HTONS(n2); |
581 | f0cbd3ec | bellard | /* n2 is the one on our host */
|
582 | 460fec67 | Jan Kiszka | for (tmpso = slirp->tcb.so_next;
|
583 | 460fec67 | Jan Kiszka | tmpso != &slirp->tcb; |
584 | 460fec67 | Jan Kiszka | tmpso = tmpso->so_next) { |
585 | f0cbd3ec | bellard | if (tmpso->so_laddr.s_addr == so->so_laddr.s_addr &&
|
586 | f0cbd3ec | bellard | tmpso->so_lport == n2 && |
587 | f0cbd3ec | bellard | tmpso->so_faddr.s_addr == so->so_faddr.s_addr && |
588 | f0cbd3ec | bellard | tmpso->so_fport == n1) { |
589 | f0cbd3ec | bellard | if (getsockname(tmpso->s,
|
590 | f0cbd3ec | bellard | (struct sockaddr *)&addr, &addrlen) == 0) |
591 | f0cbd3ec | bellard | n2 = ntohs(addr.sin_port); |
592 | f0cbd3ec | bellard | break;
|
593 | f0cbd3ec | bellard | } |
594 | f0cbd3ec | bellard | } |
595 | f0cbd3ec | bellard | } |
596 | 363a37d5 | blueswir1 | so_rcv->sb_cc = snprintf(so_rcv->sb_data, |
597 | 363a37d5 | blueswir1 | so_rcv->sb_datalen, |
598 | 363a37d5 | blueswir1 | "%d,%d\r\n", n1, n2);
|
599 | f0cbd3ec | bellard | so_rcv->sb_rptr = so_rcv->sb_data; |
600 | f0cbd3ec | bellard | so_rcv->sb_wptr = so_rcv->sb_data + so_rcv->sb_cc; |
601 | f0cbd3ec | bellard | } |
602 | f0cbd3ec | bellard | m_free(m); |
603 | f0cbd3ec | bellard | return 0; |
604 | f0cbd3ec | bellard | } |
605 | 3b46e624 | ths | |
606 | f0cbd3ec | bellard | case EMU_FTP: /* ftp */ |
607 | 511d2b14 | blueswir1 | *(m->m_data+m->m_len) = 0; /* NUL terminate for strstr */ |
608 | f0cbd3ec | bellard | if ((bptr = (char *)strstr(m->m_data, "ORT")) != NULL) { |
609 | f0cbd3ec | bellard | /*
|
610 | f0cbd3ec | bellard | * Need to emulate the PORT command
|
611 | 3b46e624 | ths | */
|
612 | 9634d903 | blueswir1 | x = sscanf(bptr, "ORT %u,%u,%u,%u,%u,%u\r\n%256[^\177]",
|
613 | f0cbd3ec | bellard | &n1, &n2, &n3, &n4, &n5, &n6, buff); |
614 | f0cbd3ec | bellard | if (x < 6) |
615 | f0cbd3ec | bellard | return 1; |
616 | 3b46e624 | ths | |
617 | f0cbd3ec | bellard | laddr = htonl((n1 << 24) | (n2 << 16) | (n3 << 8) | (n4)); |
618 | f0cbd3ec | bellard | lport = htons((n5 << 8) | (n6));
|
619 | 3b46e624 | ths | |
620 | 460fec67 | Jan Kiszka | if ((so = tcp_listen(slirp, INADDR_ANY, 0, laddr, |
621 | 460fec67 | Jan Kiszka | lport, SS_FACCEPTONCE)) == NULL) {
|
622 | f0cbd3ec | bellard | return 1; |
623 | 460fec67 | Jan Kiszka | } |
624 | f0cbd3ec | bellard | n6 = ntohs(so->so_fport); |
625 | 3b46e624 | ths | |
626 | f0cbd3ec | bellard | n5 = (n6 >> 8) & 0xff; |
627 | f0cbd3ec | bellard | n6 &= 0xff;
|
628 | 3b46e624 | ths | |
629 | f0cbd3ec | bellard | laddr = ntohl(so->so_faddr.s_addr); |
630 | 3b46e624 | ths | |
631 | f0cbd3ec | bellard | n1 = ((laddr >> 24) & 0xff); |
632 | f0cbd3ec | bellard | n2 = ((laddr >> 16) & 0xff); |
633 | f0cbd3ec | bellard | n3 = ((laddr >> 8) & 0xff); |
634 | f0cbd3ec | bellard | n4 = (laddr & 0xff);
|
635 | 3b46e624 | ths | |
636 | f0cbd3ec | bellard | m->m_len = bptr - m->m_data; /* Adjust length */
|
637 | 363a37d5 | blueswir1 | m->m_len += snprintf(bptr, m->m_hdr.mh_size - m->m_len, |
638 | 363a37d5 | blueswir1 | "ORT %d,%d,%d,%d,%d,%d\r\n%s",
|
639 | 363a37d5 | blueswir1 | n1, n2, n3, n4, n5, n6, x==7?buff:""); |
640 | f0cbd3ec | bellard | return 1; |
641 | f0cbd3ec | bellard | } else if ((bptr = (char *)strstr(m->m_data, "27 Entering")) != NULL) { |
642 | f0cbd3ec | bellard | /*
|
643 | f0cbd3ec | bellard | * Need to emulate the PASV response
|
644 | f0cbd3ec | bellard | */
|
645 | 9634d903 | blueswir1 | x = sscanf(bptr, "27 Entering Passive Mode (%u,%u,%u,%u,%u,%u)\r\n%256[^\177]",
|
646 | f0cbd3ec | bellard | &n1, &n2, &n3, &n4, &n5, &n6, buff); |
647 | f0cbd3ec | bellard | if (x < 6) |
648 | f0cbd3ec | bellard | return 1; |
649 | 3b46e624 | ths | |
650 | f0cbd3ec | bellard | laddr = htonl((n1 << 24) | (n2 << 16) | (n3 << 8) | (n4)); |
651 | f0cbd3ec | bellard | lport = htons((n5 << 8) | (n6));
|
652 | 3b46e624 | ths | |
653 | 460fec67 | Jan Kiszka | if ((so = tcp_listen(slirp, INADDR_ANY, 0, laddr, |
654 | 460fec67 | Jan Kiszka | lport, SS_FACCEPTONCE)) == NULL) {
|
655 | f0cbd3ec | bellard | return 1; |
656 | 460fec67 | Jan Kiszka | } |
657 | f0cbd3ec | bellard | n6 = ntohs(so->so_fport); |
658 | 3b46e624 | ths | |
659 | f0cbd3ec | bellard | n5 = (n6 >> 8) & 0xff; |
660 | f0cbd3ec | bellard | n6 &= 0xff;
|
661 | 3b46e624 | ths | |
662 | f0cbd3ec | bellard | laddr = ntohl(so->so_faddr.s_addr); |
663 | 3b46e624 | ths | |
664 | f0cbd3ec | bellard | n1 = ((laddr >> 24) & 0xff); |
665 | f0cbd3ec | bellard | n2 = ((laddr >> 16) & 0xff); |
666 | f0cbd3ec | bellard | n3 = ((laddr >> 8) & 0xff); |
667 | f0cbd3ec | bellard | n4 = (laddr & 0xff);
|
668 | 3b46e624 | ths | |
669 | f0cbd3ec | bellard | m->m_len = bptr - m->m_data; /* Adjust length */
|
670 | 363a37d5 | blueswir1 | m->m_len += snprintf(bptr, m->m_hdr.mh_size - m->m_len, |
671 | 363a37d5 | blueswir1 | "27 Entering Passive Mode (%d,%d,%d,%d,%d,%d)\r\n%s",
|
672 | 363a37d5 | blueswir1 | n1, n2, n3, n4, n5, n6, x==7?buff:""); |
673 | 3b46e624 | ths | |
674 | f0cbd3ec | bellard | return 1; |
675 | f0cbd3ec | bellard | } |
676 | 3b46e624 | ths | |
677 | f0cbd3ec | bellard | return 1; |
678 | 3b46e624 | ths | |
679 | f0cbd3ec | bellard | case EMU_KSH:
|
680 | f0cbd3ec | bellard | /*
|
681 | f0cbd3ec | bellard | * The kshell (Kerberos rsh) and shell services both pass
|
682 | f0cbd3ec | bellard | * a local port port number to carry signals to the server
|
683 | f0cbd3ec | bellard | * and stderr to the client. It is passed at the beginning
|
684 | f0cbd3ec | bellard | * of the connection as a NUL-terminated decimal ASCII string.
|
685 | f0cbd3ec | bellard | */
|
686 | f0cbd3ec | bellard | so->so_emu = 0;
|
687 | f0cbd3ec | bellard | for (lport = 0, i = 0; i < m->m_len-1; ++i) { |
688 | f0cbd3ec | bellard | if (m->m_data[i] < '0' || m->m_data[i] > '9') |
689 | f0cbd3ec | bellard | return 1; /* invalid number */ |
690 | f0cbd3ec | bellard | lport *= 10;
|
691 | f0cbd3ec | bellard | lport += m->m_data[i] - '0';
|
692 | f0cbd3ec | bellard | } |
693 | f0cbd3ec | bellard | if (m->m_data[m->m_len-1] == '\0' && lport != 0 && |
694 | 460fec67 | Jan Kiszka | (so = tcp_listen(slirp, INADDR_ANY, 0, so->so_laddr.s_addr,
|
695 | 460fec67 | Jan Kiszka | htons(lport), SS_FACCEPTONCE)) != NULL)
|
696 | 363a37d5 | blueswir1 | m->m_len = snprintf(m->m_data, m->m_hdr.mh_size, "%d",
|
697 | 363a37d5 | blueswir1 | ntohs(so->so_fport)) + 1;
|
698 | f0cbd3ec | bellard | return 1; |
699 | 3b46e624 | ths | |
700 | f0cbd3ec | bellard | case EMU_IRC:
|
701 | f0cbd3ec | bellard | /*
|
702 | f0cbd3ec | bellard | * Need to emulate DCC CHAT, DCC SEND and DCC MOVE
|
703 | f0cbd3ec | bellard | */
|
704 | f0cbd3ec | bellard | *(m->m_data+m->m_len) = 0; /* NULL terminate the string for strstr */ |
705 | f0cbd3ec | bellard | if ((bptr = (char *)strstr(m->m_data, "DCC")) == NULL) |
706 | f0cbd3ec | bellard | return 1; |
707 | 3b46e624 | ths | |
708 | f0cbd3ec | bellard | /* The %256s is for the broken mIRC */
|
709 | f0cbd3ec | bellard | if (sscanf(bptr, "DCC CHAT %256s %u %u", buff, &laddr, &lport) == 3) { |
710 | 460fec67 | Jan Kiszka | if ((so = tcp_listen(slirp, INADDR_ANY, 0, |
711 | 460fec67 | Jan Kiszka | htonl(laddr), htons(lport), |
712 | 460fec67 | Jan Kiszka | SS_FACCEPTONCE)) == NULL) {
|
713 | f0cbd3ec | bellard | return 1; |
714 | 460fec67 | Jan Kiszka | } |
715 | f0cbd3ec | bellard | m->m_len = bptr - m->m_data; /* Adjust length */
|
716 | 363a37d5 | blueswir1 | m->m_len += snprintf(bptr, m->m_hdr.mh_size, |
717 | 363a37d5 | blueswir1 | "DCC CHAT chat %lu %u%c\n",
|
718 | 363a37d5 | blueswir1 | (unsigned long)ntohl(so->so_faddr.s_addr), |
719 | 363a37d5 | blueswir1 | ntohs(so->so_fport), 1);
|
720 | f0cbd3ec | bellard | } else if (sscanf(bptr, "DCC SEND %256s %u %u %u", buff, &laddr, &lport, &n1) == 4) { |
721 | 460fec67 | Jan Kiszka | if ((so = tcp_listen(slirp, INADDR_ANY, 0, |
722 | 460fec67 | Jan Kiszka | htonl(laddr), htons(lport), |
723 | 460fec67 | Jan Kiszka | SS_FACCEPTONCE)) == NULL) {
|
724 | f0cbd3ec | bellard | return 1; |
725 | 460fec67 | Jan Kiszka | } |
726 | f0cbd3ec | bellard | m->m_len = bptr - m->m_data; /* Adjust length */
|
727 | 363a37d5 | blueswir1 | m->m_len += snprintf(bptr, m->m_hdr.mh_size, |
728 | 363a37d5 | blueswir1 | "DCC SEND %s %lu %u %u%c\n", buff,
|
729 | 363a37d5 | blueswir1 | (unsigned long)ntohl(so->so_faddr.s_addr), |
730 | 363a37d5 | blueswir1 | ntohs(so->so_fport), n1, 1);
|
731 | f0cbd3ec | bellard | } else if (sscanf(bptr, "DCC MOVE %256s %u %u %u", buff, &laddr, &lport, &n1) == 4) { |
732 | 460fec67 | Jan Kiszka | if ((so = tcp_listen(slirp, INADDR_ANY, 0, |
733 | 460fec67 | Jan Kiszka | htonl(laddr), htons(lport), |
734 | 460fec67 | Jan Kiszka | SS_FACCEPTONCE)) == NULL) {
|
735 | f0cbd3ec | bellard | return 1; |
736 | 460fec67 | Jan Kiszka | } |
737 | f0cbd3ec | bellard | m->m_len = bptr - m->m_data; /* Adjust length */
|
738 | 363a37d5 | blueswir1 | m->m_len += snprintf(bptr, m->m_hdr.mh_size, |
739 | 363a37d5 | blueswir1 | "DCC MOVE %s %lu %u %u%c\n", buff,
|
740 | 363a37d5 | blueswir1 | (unsigned long)ntohl(so->so_faddr.s_addr), |
741 | 363a37d5 | blueswir1 | ntohs(so->so_fport), n1, 1);
|
742 | f0cbd3ec | bellard | } |
743 | f0cbd3ec | bellard | return 1; |
744 | f0cbd3ec | bellard | |
745 | f0cbd3ec | bellard | case EMU_REALAUDIO:
|
746 | 5fafdf24 | ths | /*
|
747 | f0cbd3ec | bellard | * RealAudio emulation - JP. We must try to parse the incoming
|
748 | f0cbd3ec | bellard | * data and try to find the two characters that contain the
|
749 | f0cbd3ec | bellard | * port number. Then we redirect an udp port and replace the
|
750 | f0cbd3ec | bellard | * number with the real port we got.
|
751 | f0cbd3ec | bellard | *
|
752 | f0cbd3ec | bellard | * The 1.0 beta versions of the player are not supported
|
753 | f0cbd3ec | bellard | * any more.
|
754 | 5fafdf24 | ths | *
|
755 | f0cbd3ec | bellard | * A typical packet for player version 1.0 (release version):
|
756 | 3b46e624 | ths | *
|
757 | 5fafdf24 | ths | * 0000:50 4E 41 00 05
|
758 | 0d62c4cf | Jan Kiszka | * 0000:00 01 00 02 1B D7 00 00 67 E6 6C DC 63 00 12 50 ........g.l.c..P
|
759 | f0cbd3ec | bellard | * 0010:4E 43 4C 49 45 4E 54 20 31 30 31 20 41 4C 50 48 NCLIENT 101 ALPH
|
760 | f0cbd3ec | bellard | * 0020:41 6C 00 00 52 00 17 72 61 66 69 6C 65 73 2F 76 Al..R..rafiles/v
|
761 | f0cbd3ec | bellard | * 0030:6F 61 2F 65 6E 67 6C 69 73 68 5F 2E 72 61 79 42 oa/english_.rayB
|
762 | 3b46e624 | ths | *
|
763 | f0cbd3ec | bellard | * Now the port number 0x1BD7 is found at offset 0x04 of the
|
764 | f0cbd3ec | bellard | * Now the port number 0x1BD7 is found at offset 0x04 of the
|
765 | f0cbd3ec | bellard | * second packet. This time we received five bytes first and
|
766 | f0cbd3ec | bellard | * then the rest. You never know how many bytes you get.
|
767 | f0cbd3ec | bellard | *
|
768 | f0cbd3ec | bellard | * A typical packet for player version 2.0 (beta):
|
769 | 3b46e624 | ths | *
|
770 | 0d62c4cf | Jan Kiszka | * 0000:50 4E 41 00 06 00 02 00 00 00 01 00 02 1B C1 00 PNA.............
|
771 | 0d62c4cf | Jan Kiszka | * 0010:00 67 75 78 F5 63 00 0A 57 69 6E 32 2E 30 2E 30 .gux.c..Win2.0.0
|
772 | f0cbd3ec | bellard | * 0020:2E 35 6C 00 00 52 00 1C 72 61 66 69 6C 65 73 2F .5l..R..rafiles/
|
773 | f0cbd3ec | bellard | * 0030:77 65 62 73 69 74 65 2F 32 30 72 65 6C 65 61 73 website/20releas
|
774 | f0cbd3ec | bellard | * 0040:65 2E 72 61 79 53 00 00 06 36 42 e.rayS...6B
|
775 | 3b46e624 | ths | *
|
776 | f0cbd3ec | bellard | * Port number 0x1BC1 is found at offset 0x0d.
|
777 | 3b46e624 | ths | *
|
778 | f0cbd3ec | bellard | * This is just a horrible switch statement. Variable ra tells
|
779 | f0cbd3ec | bellard | * us where we're going.
|
780 | f0cbd3ec | bellard | */
|
781 | 3b46e624 | ths | |
782 | f0cbd3ec | bellard | bptr = m->m_data; |
783 | f0cbd3ec | bellard | while (bptr < m->m_data + m->m_len) {
|
784 | f0cbd3ec | bellard | u_short p; |
785 | f0cbd3ec | bellard | static int ra = 0; |
786 | 5fafdf24 | ths | char ra_tbl[4]; |
787 | 3b46e624 | ths | |
788 | f0cbd3ec | bellard | ra_tbl[0] = 0x50; |
789 | f0cbd3ec | bellard | ra_tbl[1] = 0x4e; |
790 | f0cbd3ec | bellard | ra_tbl[2] = 0x41; |
791 | f0cbd3ec | bellard | ra_tbl[3] = 0; |
792 | 3b46e624 | ths | |
793 | f0cbd3ec | bellard | switch (ra) {
|
794 | f0cbd3ec | bellard | case 0: |
795 | f0cbd3ec | bellard | case 2: |
796 | f0cbd3ec | bellard | case 3: |
797 | f0cbd3ec | bellard | if (*bptr++ != ra_tbl[ra]) {
|
798 | f0cbd3ec | bellard | ra = 0;
|
799 | f0cbd3ec | bellard | continue;
|
800 | f0cbd3ec | bellard | } |
801 | f0cbd3ec | bellard | break;
|
802 | 3b46e624 | ths | |
803 | f0cbd3ec | bellard | case 1: |
804 | f0cbd3ec | bellard | /*
|
805 | f0cbd3ec | bellard | * We may get 0x50 several times, ignore them
|
806 | f0cbd3ec | bellard | */
|
807 | f0cbd3ec | bellard | if (*bptr == 0x50) { |
808 | f0cbd3ec | bellard | ra = 1;
|
809 | f0cbd3ec | bellard | bptr++; |
810 | f0cbd3ec | bellard | continue;
|
811 | f0cbd3ec | bellard | } else if (*bptr++ != ra_tbl[ra]) { |
812 | f0cbd3ec | bellard | ra = 0;
|
813 | f0cbd3ec | bellard | continue;
|
814 | f0cbd3ec | bellard | } |
815 | f0cbd3ec | bellard | break;
|
816 | 3b46e624 | ths | |
817 | 5fafdf24 | ths | case 4: |
818 | 5fafdf24 | ths | /*
|
819 | f0cbd3ec | bellard | * skip version number
|
820 | f0cbd3ec | bellard | */
|
821 | f0cbd3ec | bellard | bptr++; |
822 | f0cbd3ec | bellard | break;
|
823 | 3b46e624 | ths | |
824 | 5fafdf24 | ths | case 5: |
825 | f0cbd3ec | bellard | /*
|
826 | f0cbd3ec | bellard | * The difference between versions 1.0 and
|
827 | f0cbd3ec | bellard | * 2.0 is here. For future versions of
|
828 | f0cbd3ec | bellard | * the player this may need to be modified.
|
829 | f0cbd3ec | bellard | */
|
830 | f0cbd3ec | bellard | if (*(bptr + 1) == 0x02) |
831 | f0cbd3ec | bellard | bptr += 8;
|
832 | f0cbd3ec | bellard | else
|
833 | f0cbd3ec | bellard | bptr += 4;
|
834 | 3b46e624 | ths | break;
|
835 | 3b46e624 | ths | |
836 | f0cbd3ec | bellard | case 6: |
837 | f0cbd3ec | bellard | /* This is the field containing the port
|
838 | f0cbd3ec | bellard | * number that RA-player is listening to.
|
839 | f0cbd3ec | bellard | */
|
840 | 5fafdf24 | ths | lport = (((u_char*)bptr)[0] << 8) |
841 | f0cbd3ec | bellard | + ((u_char *)bptr)[1];
|
842 | 3b46e624 | ths | if (lport < 6970) |
843 | f0cbd3ec | bellard | lport += 256; /* don't know why */ |
844 | f0cbd3ec | bellard | if (lport < 6970 || lport > 7170) |
845 | f0cbd3ec | bellard | return 1; /* failed */ |
846 | 3b46e624 | ths | |
847 | f0cbd3ec | bellard | /* try to get udp port between 6970 - 7170 */
|
848 | f0cbd3ec | bellard | for (p = 6970; p < 7071; p++) { |
849 | 460fec67 | Jan Kiszka | if (udp_listen(slirp, INADDR_ANY,
|
850 | 3c6a0580 | Jan Kiszka | htons(p), |
851 | f0cbd3ec | bellard | so->so_laddr.s_addr, |
852 | f0cbd3ec | bellard | htons(lport), |
853 | f0cbd3ec | bellard | SS_FACCEPTONCE)) { |
854 | f0cbd3ec | bellard | break;
|
855 | f0cbd3ec | bellard | } |
856 | f0cbd3ec | bellard | } |
857 | f0cbd3ec | bellard | if (p == 7071) |
858 | f0cbd3ec | bellard | p = 0;
|
859 | f0cbd3ec | bellard | *(u_char *)bptr++ = (p >> 8) & 0xff; |
860 | f0cbd3ec | bellard | *(u_char *)bptr++ = p & 0xff;
|
861 | 5fafdf24 | ths | ra = 0;
|
862 | f0cbd3ec | bellard | return 1; /* port redirected, we're done */ |
863 | 3b46e624 | ths | break;
|
864 | 3b46e624 | ths | |
865 | f0cbd3ec | bellard | default:
|
866 | 3b46e624 | ths | ra = 0;
|
867 | f0cbd3ec | bellard | } |
868 | f0cbd3ec | bellard | ra++; |
869 | f0cbd3ec | bellard | } |
870 | 3b46e624 | ths | return 1; |
871 | 3b46e624 | ths | |
872 | f0cbd3ec | bellard | default:
|
873 | f0cbd3ec | bellard | /* Ooops, not emulated, won't call tcp_emu again */
|
874 | f0cbd3ec | bellard | so->so_emu = 0;
|
875 | f0cbd3ec | bellard | return 1; |
876 | f0cbd3ec | bellard | } |
877 | f0cbd3ec | bellard | } |
878 | f0cbd3ec | bellard | |
879 | f0cbd3ec | bellard | /*
|
880 | f0cbd3ec | bellard | * Do misc. config of SLiRP while its running.
|
881 | f0cbd3ec | bellard | * Return 0 if this connections is to be closed, 1 otherwise,
|
882 | f0cbd3ec | bellard | * return 2 if this is a command-line connection
|
883 | f0cbd3ec | bellard | */
|
884 | b35725c5 | Jan Kiszka | int tcp_ctl(struct socket *so) |
885 | f0cbd3ec | bellard | { |
886 | 460fec67 | Jan Kiszka | Slirp *slirp = so->slirp; |
887 | b35725c5 | Jan Kiszka | struct sbuf *sb = &so->so_snd;
|
888 | b35725c5 | Jan Kiszka | struct ex_list *ex_ptr;
|
889 | b35725c5 | Jan Kiszka | int do_pty;
|
890 | b35725c5 | Jan Kiszka | |
891 | b35725c5 | Jan Kiszka | DEBUG_CALL("tcp_ctl");
|
892 | b35725c5 | Jan Kiszka | DEBUG_ARG("so = %lx", (long )so); |
893 | b35725c5 | Jan Kiszka | |
894 | 460fec67 | Jan Kiszka | if (so->so_faddr.s_addr != slirp->vhost_addr.s_addr) {
|
895 | b35725c5 | Jan Kiszka | /* Check if it's pty_exec */
|
896 | 460fec67 | Jan Kiszka | for (ex_ptr = slirp->exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) {
|
897 | b35725c5 | Jan Kiszka | if (ex_ptr->ex_fport == so->so_fport &&
|
898 | a13a4126 | Jan Kiszka | so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr) { |
899 | b35725c5 | Jan Kiszka | if (ex_ptr->ex_pty == 3) { |
900 | b35725c5 | Jan Kiszka | so->s = -1;
|
901 | b35725c5 | Jan Kiszka | so->extra = (void *)ex_ptr->ex_exec;
|
902 | b35725c5 | Jan Kiszka | return 1; |
903 | b35725c5 | Jan Kiszka | } |
904 | b35725c5 | Jan Kiszka | do_pty = ex_ptr->ex_pty; |
905 | b35725c5 | Jan Kiszka | DEBUG_MISC((dfd, " executing %s \n",ex_ptr->ex_exec));
|
906 | b35725c5 | Jan Kiszka | return fork_exec(so, ex_ptr->ex_exec, do_pty);
|
907 | b35725c5 | Jan Kiszka | } |
908 | b35725c5 | Jan Kiszka | } |
909 | b35725c5 | Jan Kiszka | } |
910 | b35725c5 | Jan Kiszka | sb->sb_cc = |
911 | b35725c5 | Jan Kiszka | snprintf(sb->sb_wptr, sb->sb_datalen - (sb->sb_wptr - sb->sb_data), |
912 | b35725c5 | Jan Kiszka | "Error: No application configured.\r\n");
|
913 | b35725c5 | Jan Kiszka | sb->sb_wptr += sb->sb_cc; |
914 | b35725c5 | Jan Kiszka | return 0; |
915 | f0cbd3ec | bellard | } |