root / slirp / socket.c @ dc5d0b3d
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1 | f0cbd3ec | bellard | /*
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2 | f0cbd3ec | bellard | * Copyright (c) 1995 Danny Gasparovski.
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3 | f0cbd3ec | bellard | *
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4 | f0cbd3ec | bellard | * Please read the file COPYRIGHT for the
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5 | f0cbd3ec | bellard | * terms and conditions of the copyright.
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6 | f0cbd3ec | bellard | */
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7 | f0cbd3ec | bellard | |
8 | f0cbd3ec | bellard | #define WANT_SYS_IOCTL_H
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9 | f0cbd3ec | bellard | #include <slirp.h> |
10 | f0cbd3ec | bellard | #include "ip_icmp.h" |
11 | f0cbd3ec | bellard | #include "main.h" |
12 | f0cbd3ec | bellard | |
13 | f0cbd3ec | bellard | void
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14 | f0cbd3ec | bellard | so_init() |
15 | f0cbd3ec | bellard | { |
16 | f0cbd3ec | bellard | /* Nothing yet */
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17 | f0cbd3ec | bellard | } |
18 | f0cbd3ec | bellard | |
19 | f0cbd3ec | bellard | |
20 | f0cbd3ec | bellard | struct socket *
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21 | f0cbd3ec | bellard | solookup(head, laddr, lport, faddr, fport) |
22 | f0cbd3ec | bellard | struct socket *head;
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23 | f0cbd3ec | bellard | struct in_addr laddr;
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24 | f0cbd3ec | bellard | u_int lport; |
25 | f0cbd3ec | bellard | struct in_addr faddr;
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26 | f0cbd3ec | bellard | u_int fport; |
27 | f0cbd3ec | bellard | { |
28 | f0cbd3ec | bellard | struct socket *so;
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29 | f0cbd3ec | bellard | |
30 | f0cbd3ec | bellard | for (so = head->so_next; so != head; so = so->so_next) {
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31 | f0cbd3ec | bellard | if (so->so_lport == lport &&
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32 | f0cbd3ec | bellard | so->so_laddr.s_addr == laddr.s_addr && |
33 | f0cbd3ec | bellard | so->so_faddr.s_addr == faddr.s_addr && |
34 | f0cbd3ec | bellard | so->so_fport == fport) |
35 | f0cbd3ec | bellard | break;
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36 | f0cbd3ec | bellard | } |
37 | f0cbd3ec | bellard | |
38 | f0cbd3ec | bellard | if (so == head)
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39 | f0cbd3ec | bellard | return (struct socket *)NULL; |
40 | f0cbd3ec | bellard | return so;
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41 | f0cbd3ec | bellard | |
42 | f0cbd3ec | bellard | } |
43 | f0cbd3ec | bellard | |
44 | f0cbd3ec | bellard | /*
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45 | f0cbd3ec | bellard | * Create a new socket, initialise the fields
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46 | f0cbd3ec | bellard | * It is the responsibility of the caller to
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47 | f0cbd3ec | bellard | * insque() it into the correct linked-list
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48 | f0cbd3ec | bellard | */
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49 | f0cbd3ec | bellard | struct socket *
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50 | f0cbd3ec | bellard | socreate() |
51 | f0cbd3ec | bellard | { |
52 | f0cbd3ec | bellard | struct socket *so;
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53 | f0cbd3ec | bellard | |
54 | f0cbd3ec | bellard | so = (struct socket *)malloc(sizeof(struct socket)); |
55 | f0cbd3ec | bellard | if(so) {
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56 | f0cbd3ec | bellard | memset(so, 0, sizeof(struct socket)); |
57 | f0cbd3ec | bellard | so->so_state = SS_NOFDREF; |
58 | f0cbd3ec | bellard | so->s = -1;
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59 | f0cbd3ec | bellard | } |
60 | f0cbd3ec | bellard | return(so);
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61 | f0cbd3ec | bellard | } |
62 | f0cbd3ec | bellard | |
63 | f0cbd3ec | bellard | /*
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64 | f0cbd3ec | bellard | * remque and free a socket, clobber cache
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65 | f0cbd3ec | bellard | */
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66 | f0cbd3ec | bellard | void
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67 | f0cbd3ec | bellard | sofree(so) |
68 | f0cbd3ec | bellard | struct socket *so;
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69 | f0cbd3ec | bellard | { |
70 | f0cbd3ec | bellard | if (so->so_emu==EMU_RSH && so->extra) {
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71 | f0cbd3ec | bellard | sofree(so->extra); |
72 | f0cbd3ec | bellard | so->extra=NULL;
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73 | f0cbd3ec | bellard | } |
74 | f0cbd3ec | bellard | if (so == tcp_last_so)
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75 | f0cbd3ec | bellard | tcp_last_so = &tcb; |
76 | f0cbd3ec | bellard | else if (so == udp_last_so) |
77 | f0cbd3ec | bellard | udp_last_so = &udb; |
78 | f0cbd3ec | bellard | |
79 | f0cbd3ec | bellard | m_free(so->so_m); |
80 | f0cbd3ec | bellard | |
81 | f0cbd3ec | bellard | if(so->so_next && so->so_prev)
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82 | f0cbd3ec | bellard | remque(so); /* crashes if so is not in a queue */
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83 | f0cbd3ec | bellard | |
84 | f0cbd3ec | bellard | free(so); |
85 | f0cbd3ec | bellard | } |
86 | f0cbd3ec | bellard | |
87 | f0cbd3ec | bellard | /*
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88 | f0cbd3ec | bellard | * Read from so's socket into sb_snd, updating all relevant sbuf fields
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89 | f0cbd3ec | bellard | * NOTE: This will only be called if it is select()ed for reading, so
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90 | f0cbd3ec | bellard | * a read() of 0 (or less) means it's disconnected
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91 | f0cbd3ec | bellard | */
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92 | f0cbd3ec | bellard | int
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93 | f0cbd3ec | bellard | soread(so) |
94 | f0cbd3ec | bellard | struct socket *so;
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95 | f0cbd3ec | bellard | { |
96 | f0cbd3ec | bellard | int n, nn, lss, total;
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97 | f0cbd3ec | bellard | struct sbuf *sb = &so->so_snd;
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98 | f0cbd3ec | bellard | int len = sb->sb_datalen - sb->sb_cc;
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99 | f0cbd3ec | bellard | struct iovec iov[2]; |
100 | f0cbd3ec | bellard | int mss = so->so_tcpcb->t_maxseg;
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101 | f0cbd3ec | bellard | |
102 | f0cbd3ec | bellard | DEBUG_CALL("soread");
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103 | f0cbd3ec | bellard | DEBUG_ARG("so = %lx", (long )so); |
104 | f0cbd3ec | bellard | |
105 | f0cbd3ec | bellard | /*
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106 | f0cbd3ec | bellard | * No need to check if there's enough room to read.
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107 | f0cbd3ec | bellard | * soread wouldn't have been called if there weren't
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108 | f0cbd3ec | bellard | */
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109 | f0cbd3ec | bellard | |
110 | f0cbd3ec | bellard | len = sb->sb_datalen - sb->sb_cc; |
111 | f0cbd3ec | bellard | |
112 | f0cbd3ec | bellard | iov[0].iov_base = sb->sb_wptr;
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113 | f0cbd3ec | bellard | if (sb->sb_wptr < sb->sb_rptr) {
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114 | f0cbd3ec | bellard | iov[0].iov_len = sb->sb_rptr - sb->sb_wptr;
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115 | f0cbd3ec | bellard | /* Should never succeed, but... */
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116 | f0cbd3ec | bellard | if (iov[0].iov_len > len) |
117 | f0cbd3ec | bellard | iov[0].iov_len = len;
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118 | f0cbd3ec | bellard | if (iov[0].iov_len > mss) |
119 | f0cbd3ec | bellard | iov[0].iov_len -= iov[0].iov_len%mss; |
120 | f0cbd3ec | bellard | n = 1;
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121 | f0cbd3ec | bellard | } else {
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122 | f0cbd3ec | bellard | iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_wptr;
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123 | f0cbd3ec | bellard | /* Should never succeed, but... */
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124 | f0cbd3ec | bellard | if (iov[0].iov_len > len) iov[0].iov_len = len; |
125 | f0cbd3ec | bellard | len -= iov[0].iov_len;
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126 | f0cbd3ec | bellard | if (len) {
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127 | f0cbd3ec | bellard | iov[1].iov_base = sb->sb_data;
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128 | f0cbd3ec | bellard | iov[1].iov_len = sb->sb_rptr - sb->sb_data;
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129 | f0cbd3ec | bellard | if(iov[1].iov_len > len) |
130 | f0cbd3ec | bellard | iov[1].iov_len = len;
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131 | f0cbd3ec | bellard | total = iov[0].iov_len + iov[1].iov_len; |
132 | f0cbd3ec | bellard | if (total > mss) {
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133 | f0cbd3ec | bellard | lss = total%mss; |
134 | f0cbd3ec | bellard | if (iov[1].iov_len > lss) { |
135 | f0cbd3ec | bellard | iov[1].iov_len -= lss;
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136 | f0cbd3ec | bellard | n = 2;
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137 | f0cbd3ec | bellard | } else {
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138 | f0cbd3ec | bellard | lss -= iov[1].iov_len;
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139 | f0cbd3ec | bellard | iov[0].iov_len -= lss;
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140 | f0cbd3ec | bellard | n = 1;
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141 | f0cbd3ec | bellard | } |
142 | f0cbd3ec | bellard | } else
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143 | f0cbd3ec | bellard | n = 2;
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144 | f0cbd3ec | bellard | } else {
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145 | f0cbd3ec | bellard | if (iov[0].iov_len > mss) |
146 | f0cbd3ec | bellard | iov[0].iov_len -= iov[0].iov_len%mss; |
147 | f0cbd3ec | bellard | n = 1;
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148 | f0cbd3ec | bellard | } |
149 | f0cbd3ec | bellard | } |
150 | f0cbd3ec | bellard | |
151 | f0cbd3ec | bellard | #ifdef HAVE_READV
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152 | f0cbd3ec | bellard | nn = readv(so->s, (struct iovec *)iov, n);
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153 | f0cbd3ec | bellard | DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn));
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154 | f0cbd3ec | bellard | #else
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155 | f0cbd3ec | bellard | nn = read(so->s, iov[0].iov_base, iov[0].iov_len); |
156 | f0cbd3ec | bellard | #endif
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157 | f0cbd3ec | bellard | if (nn <= 0) { |
158 | f0cbd3ec | bellard | if (nn < 0 && (errno == EINTR || errno == EAGAIN)) |
159 | f0cbd3ec | bellard | return 0; |
160 | f0cbd3ec | bellard | else {
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161 | f0cbd3ec | bellard | DEBUG_MISC((dfd, " --- soread() disconnected, nn = %d, errno = %d-%s\n", nn, errno,strerror(errno)));
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162 | f0cbd3ec | bellard | sofcantrcvmore(so); |
163 | f0cbd3ec | bellard | tcp_sockclosed(sototcpcb(so)); |
164 | f0cbd3ec | bellard | return -1; |
165 | f0cbd3ec | bellard | } |
166 | f0cbd3ec | bellard | } |
167 | f0cbd3ec | bellard | |
168 | f0cbd3ec | bellard | #ifndef HAVE_READV
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169 | f0cbd3ec | bellard | /*
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170 | f0cbd3ec | bellard | * If there was no error, try and read the second time round
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171 | f0cbd3ec | bellard | * We read again if n = 2 (ie, there's another part of the buffer)
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172 | f0cbd3ec | bellard | * and we read as much as we could in the first read
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173 | f0cbd3ec | bellard | * We don't test for <= 0 this time, because there legitimately
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174 | f0cbd3ec | bellard | * might not be any more data (since the socket is non-blocking),
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175 | f0cbd3ec | bellard | * a close will be detected on next iteration.
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176 | f0cbd3ec | bellard | * A return of -1 wont (shouldn't) happen, since it didn't happen above
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177 | f0cbd3ec | bellard | */
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178 | f0cbd3ec | bellard | if (n == 2 && nn == iov[0].iov_len) |
179 | f0cbd3ec | bellard | nn += read(so->s, iov[1].iov_base, iov[1].iov_len); |
180 | f0cbd3ec | bellard | |
181 | f0cbd3ec | bellard | DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn));
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182 | f0cbd3ec | bellard | #endif
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183 | f0cbd3ec | bellard | |
184 | f0cbd3ec | bellard | /* Update fields */
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185 | f0cbd3ec | bellard | sb->sb_cc += nn; |
186 | f0cbd3ec | bellard | sb->sb_wptr += nn; |
187 | f0cbd3ec | bellard | if (sb->sb_wptr >= (sb->sb_data + sb->sb_datalen))
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188 | f0cbd3ec | bellard | sb->sb_wptr -= sb->sb_datalen; |
189 | f0cbd3ec | bellard | return nn;
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190 | f0cbd3ec | bellard | } |
191 | f0cbd3ec | bellard | |
192 | f0cbd3ec | bellard | /*
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193 | f0cbd3ec | bellard | * Get urgent data
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194 | f0cbd3ec | bellard | *
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195 | f0cbd3ec | bellard | * When the socket is created, we set it SO_OOBINLINE,
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196 | f0cbd3ec | bellard | * so when OOB data arrives, we soread() it and everything
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197 | f0cbd3ec | bellard | * in the send buffer is sent as urgent data
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198 | f0cbd3ec | bellard | */
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199 | f0cbd3ec | bellard | void
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200 | f0cbd3ec | bellard | sorecvoob(so) |
201 | f0cbd3ec | bellard | struct socket *so;
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202 | f0cbd3ec | bellard | { |
203 | f0cbd3ec | bellard | struct tcpcb *tp = sototcpcb(so);
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204 | f0cbd3ec | bellard | |
205 | f0cbd3ec | bellard | DEBUG_CALL("sorecvoob");
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206 | f0cbd3ec | bellard | DEBUG_ARG("so = %lx", (long)so); |
207 | f0cbd3ec | bellard | |
208 | f0cbd3ec | bellard | /*
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209 | f0cbd3ec | bellard | * We take a guess at how much urgent data has arrived.
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210 | f0cbd3ec | bellard | * In most situations, when urgent data arrives, the next
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211 | f0cbd3ec | bellard | * read() should get all the urgent data. This guess will
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212 | f0cbd3ec | bellard | * be wrong however if more data arrives just after the
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213 | f0cbd3ec | bellard | * urgent data, or the read() doesn't return all the
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214 | f0cbd3ec | bellard | * urgent data.
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215 | f0cbd3ec | bellard | */
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216 | f0cbd3ec | bellard | soread(so); |
217 | f0cbd3ec | bellard | tp->snd_up = tp->snd_una + so->so_snd.sb_cc; |
218 | f0cbd3ec | bellard | tp->t_force = 1;
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219 | f0cbd3ec | bellard | tcp_output(tp); |
220 | f0cbd3ec | bellard | tp->t_force = 0;
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221 | f0cbd3ec | bellard | } |
222 | f0cbd3ec | bellard | |
223 | f0cbd3ec | bellard | /*
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224 | f0cbd3ec | bellard | * Send urgent data
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225 | f0cbd3ec | bellard | * There's a lot duplicated code here, but...
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226 | f0cbd3ec | bellard | */
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227 | f0cbd3ec | bellard | int
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228 | f0cbd3ec | bellard | sosendoob(so) |
229 | f0cbd3ec | bellard | struct socket *so;
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230 | f0cbd3ec | bellard | { |
231 | f0cbd3ec | bellard | struct sbuf *sb = &so->so_rcv;
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232 | f0cbd3ec | bellard | char buff[2048]; /* XXX Shouldn't be sending more oob data than this */ |
233 | f0cbd3ec | bellard | |
234 | f0cbd3ec | bellard | int n, len;
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235 | f0cbd3ec | bellard | |
236 | f0cbd3ec | bellard | DEBUG_CALL("sosendoob");
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237 | f0cbd3ec | bellard | DEBUG_ARG("so = %lx", (long)so); |
238 | f0cbd3ec | bellard | DEBUG_ARG("sb->sb_cc = %d", sb->sb_cc);
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239 | f0cbd3ec | bellard | |
240 | f0cbd3ec | bellard | if (so->so_urgc > 2048) |
241 | f0cbd3ec | bellard | so->so_urgc = 2048; /* XXXX */ |
242 | f0cbd3ec | bellard | |
243 | f0cbd3ec | bellard | if (sb->sb_rptr < sb->sb_wptr) {
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244 | f0cbd3ec | bellard | /* We can send it directly */
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245 | f0cbd3ec | bellard | n = send(so->s, sb->sb_rptr, so->so_urgc, (MSG_OOB)); /* |MSG_DONTWAIT)); */
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246 | f0cbd3ec | bellard | so->so_urgc -= n; |
247 | f0cbd3ec | bellard | |
248 | f0cbd3ec | bellard | DEBUG_MISC((dfd, " --- sent %d bytes urgent data, %d urgent bytes left\n", n, so->so_urgc));
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249 | f0cbd3ec | bellard | } else {
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250 | f0cbd3ec | bellard | /*
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251 | f0cbd3ec | bellard | * Since there's no sendv or sendtov like writev,
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252 | f0cbd3ec | bellard | * we must copy all data to a linear buffer then
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253 | f0cbd3ec | bellard | * send it all
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254 | f0cbd3ec | bellard | */
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255 | f0cbd3ec | bellard | len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr; |
256 | f0cbd3ec | bellard | if (len > so->so_urgc) len = so->so_urgc;
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257 | f0cbd3ec | bellard | memcpy(buff, sb->sb_rptr, len); |
258 | f0cbd3ec | bellard | so->so_urgc -= len; |
259 | f0cbd3ec | bellard | if (so->so_urgc) {
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260 | f0cbd3ec | bellard | n = sb->sb_wptr - sb->sb_data; |
261 | f0cbd3ec | bellard | if (n > so->so_urgc) n = so->so_urgc;
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262 | f0cbd3ec | bellard | memcpy((buff + len), sb->sb_data, n); |
263 | f0cbd3ec | bellard | so->so_urgc -= n; |
264 | f0cbd3ec | bellard | len += n; |
265 | f0cbd3ec | bellard | } |
266 | f0cbd3ec | bellard | n = send(so->s, buff, len, (MSG_OOB)); /* |MSG_DONTWAIT)); */
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267 | f0cbd3ec | bellard | #ifdef DEBUG
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268 | f0cbd3ec | bellard | if (n != len)
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269 | f0cbd3ec | bellard | DEBUG_ERROR((dfd, "Didn't send all data urgently XXXXX\n"));
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270 | f0cbd3ec | bellard | #endif
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271 | f0cbd3ec | bellard | DEBUG_MISC((dfd, " ---2 sent %d bytes urgent data, %d urgent bytes left\n", n, so->so_urgc));
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272 | f0cbd3ec | bellard | } |
273 | f0cbd3ec | bellard | |
274 | f0cbd3ec | bellard | sb->sb_cc -= n; |
275 | f0cbd3ec | bellard | sb->sb_rptr += n; |
276 | f0cbd3ec | bellard | if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen))
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277 | f0cbd3ec | bellard | sb->sb_rptr -= sb->sb_datalen; |
278 | f0cbd3ec | bellard | |
279 | f0cbd3ec | bellard | return n;
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280 | f0cbd3ec | bellard | } |
281 | f0cbd3ec | bellard | |
282 | f0cbd3ec | bellard | /*
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283 | f0cbd3ec | bellard | * Write data from so_rcv to so's socket,
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284 | f0cbd3ec | bellard | * updating all sbuf field as necessary
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285 | f0cbd3ec | bellard | */
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286 | f0cbd3ec | bellard | int
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287 | f0cbd3ec | bellard | sowrite(so) |
288 | f0cbd3ec | bellard | struct socket *so;
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289 | f0cbd3ec | bellard | { |
290 | f0cbd3ec | bellard | int n,nn;
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291 | f0cbd3ec | bellard | struct sbuf *sb = &so->so_rcv;
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292 | f0cbd3ec | bellard | int len = sb->sb_cc;
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293 | f0cbd3ec | bellard | struct iovec iov[2]; |
294 | f0cbd3ec | bellard | |
295 | f0cbd3ec | bellard | DEBUG_CALL("sowrite");
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296 | f0cbd3ec | bellard | DEBUG_ARG("so = %lx", (long)so); |
297 | f0cbd3ec | bellard | |
298 | f0cbd3ec | bellard | if (so->so_urgc) {
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299 | f0cbd3ec | bellard | sosendoob(so); |
300 | f0cbd3ec | bellard | if (sb->sb_cc == 0) |
301 | f0cbd3ec | bellard | return 0; |
302 | f0cbd3ec | bellard | } |
303 | f0cbd3ec | bellard | |
304 | f0cbd3ec | bellard | /*
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305 | f0cbd3ec | bellard | * No need to check if there's something to write,
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306 | f0cbd3ec | bellard | * sowrite wouldn't have been called otherwise
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307 | f0cbd3ec | bellard | */
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308 | f0cbd3ec | bellard | |
309 | f0cbd3ec | bellard | len = sb->sb_cc; |
310 | f0cbd3ec | bellard | |
311 | f0cbd3ec | bellard | iov[0].iov_base = sb->sb_rptr;
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312 | f0cbd3ec | bellard | if (sb->sb_rptr < sb->sb_wptr) {
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313 | f0cbd3ec | bellard | iov[0].iov_len = sb->sb_wptr - sb->sb_rptr;
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314 | f0cbd3ec | bellard | /* Should never succeed, but... */
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315 | f0cbd3ec | bellard | if (iov[0].iov_len > len) iov[0].iov_len = len; |
316 | f0cbd3ec | bellard | n = 1;
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317 | f0cbd3ec | bellard | } else {
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318 | f0cbd3ec | bellard | iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr;
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319 | f0cbd3ec | bellard | if (iov[0].iov_len > len) iov[0].iov_len = len; |
320 | f0cbd3ec | bellard | len -= iov[0].iov_len;
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321 | f0cbd3ec | bellard | if (len) {
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322 | f0cbd3ec | bellard | iov[1].iov_base = sb->sb_data;
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323 | f0cbd3ec | bellard | iov[1].iov_len = sb->sb_wptr - sb->sb_data;
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324 | f0cbd3ec | bellard | if (iov[1].iov_len > len) iov[1].iov_len = len; |
325 | f0cbd3ec | bellard | n = 2;
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326 | f0cbd3ec | bellard | } else
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327 | f0cbd3ec | bellard | n = 1;
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328 | f0cbd3ec | bellard | } |
329 | f0cbd3ec | bellard | /* Check if there's urgent data to send, and if so, send it */
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330 | f0cbd3ec | bellard | |
331 | f0cbd3ec | bellard | #ifdef HAVE_READV
|
332 | f0cbd3ec | bellard | nn = writev(so->s, (const struct iovec *)iov, n); |
333 | f0cbd3ec | bellard | |
334 | f0cbd3ec | bellard | DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn));
|
335 | f0cbd3ec | bellard | #else
|
336 | f0cbd3ec | bellard | nn = write(so->s, iov[0].iov_base, iov[0].iov_len); |
337 | f0cbd3ec | bellard | #endif
|
338 | f0cbd3ec | bellard | /* This should never happen, but people tell me it does *shrug* */
|
339 | f0cbd3ec | bellard | if (nn < 0 && (errno == EAGAIN || errno == EINTR)) |
340 | f0cbd3ec | bellard | return 0; |
341 | f0cbd3ec | bellard | |
342 | f0cbd3ec | bellard | if (nn <= 0) { |
343 | f0cbd3ec | bellard | DEBUG_MISC((dfd, " --- sowrite disconnected, so->so_state = %x, errno = %d\n",
|
344 | f0cbd3ec | bellard | so->so_state, errno)); |
345 | f0cbd3ec | bellard | sofcantsendmore(so); |
346 | f0cbd3ec | bellard | tcp_sockclosed(sototcpcb(so)); |
347 | f0cbd3ec | bellard | return -1; |
348 | f0cbd3ec | bellard | } |
349 | f0cbd3ec | bellard | |
350 | f0cbd3ec | bellard | #ifndef HAVE_READV
|
351 | f0cbd3ec | bellard | if (n == 2 && nn == iov[0].iov_len) |
352 | f0cbd3ec | bellard | nn += write(so->s, iov[1].iov_base, iov[1].iov_len); |
353 | f0cbd3ec | bellard | DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn));
|
354 | f0cbd3ec | bellard | #endif
|
355 | f0cbd3ec | bellard | |
356 | f0cbd3ec | bellard | /* Update sbuf */
|
357 | f0cbd3ec | bellard | sb->sb_cc -= nn; |
358 | f0cbd3ec | bellard | sb->sb_rptr += nn; |
359 | f0cbd3ec | bellard | if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen))
|
360 | f0cbd3ec | bellard | sb->sb_rptr -= sb->sb_datalen; |
361 | f0cbd3ec | bellard | |
362 | f0cbd3ec | bellard | /*
|
363 | f0cbd3ec | bellard | * If in DRAIN mode, and there's no more data, set
|
364 | f0cbd3ec | bellard | * it CANTSENDMORE
|
365 | f0cbd3ec | bellard | */
|
366 | f0cbd3ec | bellard | if ((so->so_state & SS_FWDRAIN) && sb->sb_cc == 0) |
367 | f0cbd3ec | bellard | sofcantsendmore(so); |
368 | f0cbd3ec | bellard | |
369 | f0cbd3ec | bellard | return nn;
|
370 | f0cbd3ec | bellard | } |
371 | f0cbd3ec | bellard | |
372 | f0cbd3ec | bellard | /*
|
373 | f0cbd3ec | bellard | * recvfrom() a UDP socket
|
374 | f0cbd3ec | bellard | */
|
375 | f0cbd3ec | bellard | void
|
376 | f0cbd3ec | bellard | sorecvfrom(so) |
377 | f0cbd3ec | bellard | struct socket *so;
|
378 | f0cbd3ec | bellard | { |
379 | f0cbd3ec | bellard | struct sockaddr_in addr;
|
380 | f0cbd3ec | bellard | int addrlen = sizeof(struct sockaddr_in); |
381 | f0cbd3ec | bellard | |
382 | f0cbd3ec | bellard | DEBUG_CALL("sorecvfrom");
|
383 | f0cbd3ec | bellard | DEBUG_ARG("so = %lx", (long)so); |
384 | f0cbd3ec | bellard | |
385 | f0cbd3ec | bellard | if (so->so_type == IPPROTO_ICMP) { /* This is a "ping" reply */ |
386 | f0cbd3ec | bellard | char buff[256]; |
387 | f0cbd3ec | bellard | int len;
|
388 | f0cbd3ec | bellard | |
389 | f0cbd3ec | bellard | len = recvfrom(so->s, buff, 256, 0, |
390 | f0cbd3ec | bellard | (struct sockaddr *)&addr, &addrlen);
|
391 | f0cbd3ec | bellard | /* XXX Check if reply is "correct"? */
|
392 | f0cbd3ec | bellard | |
393 | f0cbd3ec | bellard | if(len == -1 || len == 0) { |
394 | f0cbd3ec | bellard | u_char code=ICMP_UNREACH_PORT; |
395 | f0cbd3ec | bellard | |
396 | f0cbd3ec | bellard | if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST;
|
397 | f0cbd3ec | bellard | else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET; |
398 | f0cbd3ec | bellard | |
399 | f0cbd3ec | bellard | DEBUG_MISC((dfd," udp icmp rx errno = %d-%s\n",
|
400 | f0cbd3ec | bellard | errno,strerror(errno))); |
401 | f0cbd3ec | bellard | icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno));
|
402 | f0cbd3ec | bellard | } else {
|
403 | f0cbd3ec | bellard | icmp_reflect(so->so_m); |
404 | f0cbd3ec | bellard | so->so_m = 0; /* Don't m_free() it again! */ |
405 | f0cbd3ec | bellard | } |
406 | f0cbd3ec | bellard | /* No need for this socket anymore, udp_detach it */
|
407 | f0cbd3ec | bellard | udp_detach(so); |
408 | f0cbd3ec | bellard | } else { /* A "normal" UDP packet */ |
409 | f0cbd3ec | bellard | struct mbuf *m;
|
410 | f0cbd3ec | bellard | int len, n;
|
411 | f0cbd3ec | bellard | |
412 | f0cbd3ec | bellard | if (!(m = m_get())) return; |
413 | f0cbd3ec | bellard | m->m_data += if_maxlinkhdr; |
414 | f0cbd3ec | bellard | |
415 | f0cbd3ec | bellard | /*
|
416 | f0cbd3ec | bellard | * XXX Shouldn't FIONREAD packets destined for port 53,
|
417 | f0cbd3ec | bellard | * but I don't know the max packet size for DNS lookups
|
418 | f0cbd3ec | bellard | */
|
419 | f0cbd3ec | bellard | len = M_FREEROOM(m); |
420 | f0cbd3ec | bellard | /* if (so->so_fport != htons(53)) { */
|
421 | f0cbd3ec | bellard | ioctl(so->s, FIONREAD, &n); |
422 | f0cbd3ec | bellard | |
423 | f0cbd3ec | bellard | if (n > len) {
|
424 | f0cbd3ec | bellard | n = (m->m_data - m->m_dat) + m->m_len + n + 1;
|
425 | f0cbd3ec | bellard | m_inc(m, n); |
426 | f0cbd3ec | bellard | len = M_FREEROOM(m); |
427 | f0cbd3ec | bellard | } |
428 | f0cbd3ec | bellard | /* } */
|
429 | f0cbd3ec | bellard | |
430 | f0cbd3ec | bellard | m->m_len = recvfrom(so->s, m->m_data, len, 0,
|
431 | f0cbd3ec | bellard | (struct sockaddr *)&addr, &addrlen);
|
432 | f0cbd3ec | bellard | DEBUG_MISC((dfd, " did recvfrom %d, errno = %d-%s\n",
|
433 | f0cbd3ec | bellard | m->m_len, errno,strerror(errno))); |
434 | f0cbd3ec | bellard | if(m->m_len<0) { |
435 | f0cbd3ec | bellard | u_char code=ICMP_UNREACH_PORT; |
436 | f0cbd3ec | bellard | |
437 | f0cbd3ec | bellard | if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST;
|
438 | f0cbd3ec | bellard | else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET; |
439 | f0cbd3ec | bellard | |
440 | f0cbd3ec | bellard | DEBUG_MISC((dfd," rx error, tx icmp ICMP_UNREACH:%i\n", code));
|
441 | f0cbd3ec | bellard | icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno));
|
442 | f0cbd3ec | bellard | m_free(m); |
443 | f0cbd3ec | bellard | } else {
|
444 | f0cbd3ec | bellard | /*
|
445 | f0cbd3ec | bellard | * Hack: domain name lookup will be used the most for UDP,
|
446 | f0cbd3ec | bellard | * and since they'll only be used once there's no need
|
447 | f0cbd3ec | bellard | * for the 4 minute (or whatever) timeout... So we time them
|
448 | f0cbd3ec | bellard | * out much quicker (10 seconds for now...)
|
449 | f0cbd3ec | bellard | */
|
450 | f0cbd3ec | bellard | if (so->so_expire) {
|
451 | f0cbd3ec | bellard | if (so->so_fport == htons(53)) |
452 | f0cbd3ec | bellard | so->so_expire = curtime + SO_EXPIREFAST; |
453 | f0cbd3ec | bellard | else
|
454 | f0cbd3ec | bellard | so->so_expire = curtime + SO_EXPIRE; |
455 | f0cbd3ec | bellard | } |
456 | f0cbd3ec | bellard | |
457 | f0cbd3ec | bellard | /* if (m->m_len == len) {
|
458 | f0cbd3ec | bellard | * m_inc(m, MINCSIZE);
|
459 | f0cbd3ec | bellard | * m->m_len = 0;
|
460 | f0cbd3ec | bellard | * }
|
461 | f0cbd3ec | bellard | */
|
462 | f0cbd3ec | bellard | |
463 | f0cbd3ec | bellard | /*
|
464 | f0cbd3ec | bellard | * If this packet was destined for CTL_ADDR,
|
465 | f0cbd3ec | bellard | * make it look like that's where it came from, done by udp_output
|
466 | f0cbd3ec | bellard | */
|
467 | f0cbd3ec | bellard | udp_output(so, m, &addr); |
468 | f0cbd3ec | bellard | } /* rx error */
|
469 | f0cbd3ec | bellard | } /* if ping packet */
|
470 | f0cbd3ec | bellard | } |
471 | f0cbd3ec | bellard | |
472 | f0cbd3ec | bellard | /*
|
473 | f0cbd3ec | bellard | * sendto() a socket
|
474 | f0cbd3ec | bellard | */
|
475 | f0cbd3ec | bellard | int
|
476 | f0cbd3ec | bellard | sosendto(so, m) |
477 | f0cbd3ec | bellard | struct socket *so;
|
478 | f0cbd3ec | bellard | struct mbuf *m;
|
479 | f0cbd3ec | bellard | { |
480 | f0cbd3ec | bellard | int ret;
|
481 | f0cbd3ec | bellard | struct sockaddr_in addr;
|
482 | f0cbd3ec | bellard | |
483 | f0cbd3ec | bellard | DEBUG_CALL("sosendto");
|
484 | f0cbd3ec | bellard | DEBUG_ARG("so = %lx", (long)so); |
485 | f0cbd3ec | bellard | DEBUG_ARG("m = %lx", (long)m); |
486 | f0cbd3ec | bellard | |
487 | f0cbd3ec | bellard | addr.sin_family = AF_INET; |
488 | f0cbd3ec | bellard | if ((so->so_faddr.s_addr & htonl(0xffffff00)) == special_addr.s_addr) { |
489 | f0cbd3ec | bellard | /* It's an alias */
|
490 | f0cbd3ec | bellard | switch(ntohl(so->so_faddr.s_addr) & 0xff) { |
491 | f0cbd3ec | bellard | case CTL_DNS:
|
492 | f0cbd3ec | bellard | addr.sin_addr = dns_addr; |
493 | f0cbd3ec | bellard | break;
|
494 | f0cbd3ec | bellard | case CTL_ALIAS:
|
495 | f0cbd3ec | bellard | default:
|
496 | f0cbd3ec | bellard | addr.sin_addr = loopback_addr; |
497 | f0cbd3ec | bellard | break;
|
498 | f0cbd3ec | bellard | } |
499 | f0cbd3ec | bellard | } else
|
500 | f0cbd3ec | bellard | addr.sin_addr = so->so_faddr; |
501 | f0cbd3ec | bellard | addr.sin_port = so->so_fport; |
502 | f0cbd3ec | bellard | |
503 | f0cbd3ec | bellard | DEBUG_MISC((dfd, " sendto()ing, addr.sin_port=%d, addr.sin_addr.s_addr=%.16s\n", ntohs(addr.sin_port), inet_ntoa(addr.sin_addr)));
|
504 | f0cbd3ec | bellard | |
505 | f0cbd3ec | bellard | /* Don't care what port we get */
|
506 | f0cbd3ec | bellard | ret = sendto(so->s, m->m_data, m->m_len, 0,
|
507 | f0cbd3ec | bellard | (struct sockaddr *)&addr, sizeof (struct sockaddr)); |
508 | f0cbd3ec | bellard | if (ret < 0) |
509 | f0cbd3ec | bellard | return -1; |
510 | f0cbd3ec | bellard | |
511 | f0cbd3ec | bellard | /*
|
512 | f0cbd3ec | bellard | * Kill the socket if there's no reply in 4 minutes,
|
513 | f0cbd3ec | bellard | * but only if it's an expirable socket
|
514 | f0cbd3ec | bellard | */
|
515 | f0cbd3ec | bellard | if (so->so_expire)
|
516 | f0cbd3ec | bellard | so->so_expire = curtime + SO_EXPIRE; |
517 | f0cbd3ec | bellard | so->so_state = SS_ISFCONNECTED; /* So that it gets select()ed */
|
518 | f0cbd3ec | bellard | return 0; |
519 | f0cbd3ec | bellard | } |
520 | f0cbd3ec | bellard | |
521 | f0cbd3ec | bellard | /*
|
522 | f0cbd3ec | bellard | * XXX This should really be tcp_listen
|
523 | f0cbd3ec | bellard | */
|
524 | f0cbd3ec | bellard | struct socket *
|
525 | f0cbd3ec | bellard | solisten(port, laddr, lport, flags) |
526 | f0cbd3ec | bellard | u_int port; |
527 | f0cbd3ec | bellard | u_int32_t laddr; |
528 | f0cbd3ec | bellard | u_int lport; |
529 | f0cbd3ec | bellard | int flags;
|
530 | f0cbd3ec | bellard | { |
531 | f0cbd3ec | bellard | struct sockaddr_in addr;
|
532 | f0cbd3ec | bellard | struct socket *so;
|
533 | f0cbd3ec | bellard | int s, addrlen = sizeof(addr), opt = 1; |
534 | f0cbd3ec | bellard | |
535 | f0cbd3ec | bellard | DEBUG_CALL("solisten");
|
536 | f0cbd3ec | bellard | DEBUG_ARG("port = %d", port);
|
537 | f0cbd3ec | bellard | DEBUG_ARG("laddr = %x", laddr);
|
538 | f0cbd3ec | bellard | DEBUG_ARG("lport = %d", lport);
|
539 | f0cbd3ec | bellard | DEBUG_ARG("flags = %x", flags);
|
540 | f0cbd3ec | bellard | |
541 | f0cbd3ec | bellard | if ((so = socreate()) == NULL) { |
542 | f0cbd3ec | bellard | /* free(so); Not sofree() ??? free(NULL) == NOP */
|
543 | f0cbd3ec | bellard | return NULL; |
544 | f0cbd3ec | bellard | } |
545 | f0cbd3ec | bellard | |
546 | f0cbd3ec | bellard | /* Don't tcp_attach... we don't need so_snd nor so_rcv */
|
547 | f0cbd3ec | bellard | if ((so->so_tcpcb = tcp_newtcpcb(so)) == NULL) { |
548 | f0cbd3ec | bellard | free(so); |
549 | f0cbd3ec | bellard | return NULL; |
550 | f0cbd3ec | bellard | } |
551 | f0cbd3ec | bellard | insque(so,&tcb); |
552 | f0cbd3ec | bellard | |
553 | f0cbd3ec | bellard | /*
|
554 | f0cbd3ec | bellard | * SS_FACCEPTONCE sockets must time out.
|
555 | f0cbd3ec | bellard | */
|
556 | f0cbd3ec | bellard | if (flags & SS_FACCEPTONCE)
|
557 | f0cbd3ec | bellard | so->so_tcpcb->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT*2;
|
558 | f0cbd3ec | bellard | |
559 | f0cbd3ec | bellard | so->so_state = (SS_FACCEPTCONN|flags); |
560 | f0cbd3ec | bellard | so->so_lport = lport; /* Kept in network format */
|
561 | f0cbd3ec | bellard | so->so_laddr.s_addr = laddr; /* Ditto */
|
562 | f0cbd3ec | bellard | |
563 | f0cbd3ec | bellard | addr.sin_family = AF_INET; |
564 | f0cbd3ec | bellard | addr.sin_addr.s_addr = INADDR_ANY; |
565 | f0cbd3ec | bellard | addr.sin_port = port; |
566 | f0cbd3ec | bellard | |
567 | f0cbd3ec | bellard | if (((s = socket(AF_INET,SOCK_STREAM,0)) < 0) || |
568 | f0cbd3ec | bellard | (bind(s,(struct sockaddr *)&addr, sizeof(addr)) < 0) || |
569 | f0cbd3ec | bellard | (listen(s,1) < 0)) { |
570 | f0cbd3ec | bellard | int tmperrno = errno; /* Don't clobber the real reason we failed */ |
571 | f0cbd3ec | bellard | |
572 | f0cbd3ec | bellard | close(s); |
573 | f0cbd3ec | bellard | sofree(so); |
574 | f0cbd3ec | bellard | /* Restore the real errno */
|
575 | f0cbd3ec | bellard | errno = tmperrno; |
576 | f0cbd3ec | bellard | return NULL; |
577 | f0cbd3ec | bellard | } |
578 | f0cbd3ec | bellard | setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int)); |
579 | f0cbd3ec | bellard | setsockopt(s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int)); |
580 | f0cbd3ec | bellard | |
581 | f0cbd3ec | bellard | getsockname(s,(struct sockaddr *)&addr,&addrlen);
|
582 | f0cbd3ec | bellard | so->so_fport = addr.sin_port; |
583 | f0cbd3ec | bellard | if (addr.sin_addr.s_addr == 0 || addr.sin_addr.s_addr == loopback_addr.s_addr) |
584 | f0cbd3ec | bellard | so->so_faddr = our_addr; |
585 | f0cbd3ec | bellard | else
|
586 | f0cbd3ec | bellard | so->so_faddr = addr.sin_addr; |
587 | f0cbd3ec | bellard | |
588 | f0cbd3ec | bellard | so->s = s; |
589 | f0cbd3ec | bellard | return so;
|
590 | f0cbd3ec | bellard | } |
591 | f0cbd3ec | bellard | |
592 | f0cbd3ec | bellard | /*
|
593 | f0cbd3ec | bellard | * Data is available in so_rcv
|
594 | f0cbd3ec | bellard | * Just write() the data to the socket
|
595 | f0cbd3ec | bellard | * XXX not yet...
|
596 | f0cbd3ec | bellard | */
|
597 | f0cbd3ec | bellard | void
|
598 | f0cbd3ec | bellard | sorwakeup(so) |
599 | f0cbd3ec | bellard | struct socket *so;
|
600 | f0cbd3ec | bellard | { |
601 | f0cbd3ec | bellard | /* sowrite(so); */
|
602 | f0cbd3ec | bellard | /* FD_CLR(so->s,&writefds); */
|
603 | f0cbd3ec | bellard | } |
604 | f0cbd3ec | bellard | |
605 | f0cbd3ec | bellard | /*
|
606 | f0cbd3ec | bellard | * Data has been freed in so_snd
|
607 | f0cbd3ec | bellard | * We have room for a read() if we want to
|
608 | f0cbd3ec | bellard | * For now, don't read, it'll be done in the main loop
|
609 | f0cbd3ec | bellard | */
|
610 | f0cbd3ec | bellard | void
|
611 | f0cbd3ec | bellard | sowwakeup(so) |
612 | f0cbd3ec | bellard | struct socket *so;
|
613 | f0cbd3ec | bellard | { |
614 | f0cbd3ec | bellard | /* Nothing, yet */
|
615 | f0cbd3ec | bellard | } |
616 | f0cbd3ec | bellard | |
617 | f0cbd3ec | bellard | /*
|
618 | f0cbd3ec | bellard | * Various session state calls
|
619 | f0cbd3ec | bellard | * XXX Should be #define's
|
620 | f0cbd3ec | bellard | * The socket state stuff needs work, these often get call 2 or 3
|
621 | f0cbd3ec | bellard | * times each when only 1 was needed
|
622 | f0cbd3ec | bellard | */
|
623 | f0cbd3ec | bellard | void
|
624 | f0cbd3ec | bellard | soisfconnecting(so) |
625 | f0cbd3ec | bellard | register struct socket *so; |
626 | f0cbd3ec | bellard | { |
627 | f0cbd3ec | bellard | so->so_state &= ~(SS_NOFDREF|SS_ISFCONNECTED|SS_FCANTRCVMORE| |
628 | f0cbd3ec | bellard | SS_FCANTSENDMORE|SS_FWDRAIN); |
629 | f0cbd3ec | bellard | so->so_state |= SS_ISFCONNECTING; /* Clobber other states */
|
630 | f0cbd3ec | bellard | } |
631 | f0cbd3ec | bellard | |
632 | f0cbd3ec | bellard | void
|
633 | f0cbd3ec | bellard | soisfconnected(so) |
634 | f0cbd3ec | bellard | register struct socket *so; |
635 | f0cbd3ec | bellard | { |
636 | f0cbd3ec | bellard | so->so_state &= ~(SS_ISFCONNECTING|SS_FWDRAIN|SS_NOFDREF); |
637 | f0cbd3ec | bellard | so->so_state |= SS_ISFCONNECTED; /* Clobber other states */
|
638 | f0cbd3ec | bellard | } |
639 | f0cbd3ec | bellard | |
640 | f0cbd3ec | bellard | void
|
641 | f0cbd3ec | bellard | sofcantrcvmore(so) |
642 | f0cbd3ec | bellard | struct socket *so;
|
643 | f0cbd3ec | bellard | { |
644 | f0cbd3ec | bellard | if ((so->so_state & SS_NOFDREF) == 0) { |
645 | f0cbd3ec | bellard | shutdown(so->s,0);
|
646 | f0cbd3ec | bellard | FD_CLR(so->s, global_writefds); |
647 | f0cbd3ec | bellard | } |
648 | f0cbd3ec | bellard | so->so_state &= ~(SS_ISFCONNECTING); |
649 | f0cbd3ec | bellard | if (so->so_state & SS_FCANTSENDMORE)
|
650 | f0cbd3ec | bellard | so->so_state = SS_NOFDREF; /* Don't select it */ /* XXX close() here as well? */ |
651 | f0cbd3ec | bellard | else
|
652 | f0cbd3ec | bellard | so->so_state |= SS_FCANTRCVMORE; |
653 | f0cbd3ec | bellard | } |
654 | f0cbd3ec | bellard | |
655 | f0cbd3ec | bellard | void
|
656 | f0cbd3ec | bellard | sofcantsendmore(so) |
657 | f0cbd3ec | bellard | struct socket *so;
|
658 | f0cbd3ec | bellard | { |
659 | f0cbd3ec | bellard | if ((so->so_state & SS_NOFDREF) == 0) { |
660 | f0cbd3ec | bellard | shutdown(so->s,1); /* send FIN to fhost */ |
661 | f0cbd3ec | bellard | FD_CLR(so->s, global_readfds); |
662 | f0cbd3ec | bellard | FD_CLR(so->s, global_xfds); |
663 | f0cbd3ec | bellard | } |
664 | f0cbd3ec | bellard | so->so_state &= ~(SS_ISFCONNECTING); |
665 | f0cbd3ec | bellard | if (so->so_state & SS_FCANTRCVMORE)
|
666 | f0cbd3ec | bellard | so->so_state = SS_NOFDREF; /* as above */
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667 | f0cbd3ec | bellard | else
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668 | f0cbd3ec | bellard | so->so_state |= SS_FCANTSENDMORE; |
669 | f0cbd3ec | bellard | } |
670 | f0cbd3ec | bellard | |
671 | f0cbd3ec | bellard | void
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672 | f0cbd3ec | bellard | soisfdisconnected(so) |
673 | f0cbd3ec | bellard | struct socket *so;
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674 | f0cbd3ec | bellard | { |
675 | f0cbd3ec | bellard | /* so->so_state &= ~(SS_ISFCONNECTING|SS_ISFCONNECTED); */
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676 | f0cbd3ec | bellard | /* close(so->s); */
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677 | f0cbd3ec | bellard | /* so->so_state = SS_ISFDISCONNECTED; */
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678 | f0cbd3ec | bellard | /*
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679 | f0cbd3ec | bellard | * XXX Do nothing ... ?
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680 | f0cbd3ec | bellard | */
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681 | f0cbd3ec | bellard | } |
682 | f0cbd3ec | bellard | |
683 | f0cbd3ec | bellard | /*
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684 | f0cbd3ec | bellard | * Set write drain mode
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685 | f0cbd3ec | bellard | * Set CANTSENDMORE once all data has been write()n
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686 | f0cbd3ec | bellard | */
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687 | f0cbd3ec | bellard | void
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688 | f0cbd3ec | bellard | sofwdrain(so) |
689 | f0cbd3ec | bellard | struct socket *so;
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690 | f0cbd3ec | bellard | { |
691 | f0cbd3ec | bellard | if (so->so_rcv.sb_cc)
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692 | f0cbd3ec | bellard | so->so_state |= SS_FWDRAIN; |
693 | f0cbd3ec | bellard | else
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694 | f0cbd3ec | bellard | sofcantsendmore(so); |
695 | f0cbd3ec | bellard | } |