| 1 |
/* |
| 2 |
* Copyright (c) 1995 Danny Gasparovski. |
| 3 |
* |
| 4 |
* Please read the file COPYRIGHT for the |
| 5 |
* terms and conditions of the copyright. |
| 6 |
*/ |
| 7 |
|
| 8 |
#define WANT_SYS_IOCTL_H |
| 9 |
#include <slirp.h> |
| 10 |
#include "ip_icmp.h" |
| 11 |
#include "main.h" |
| 12 |
|
| 13 |
void |
| 14 |
so_init() |
| 15 |
{ |
| 16 |
/* Nothing yet */ |
| 17 |
} |
| 18 |
|
| 19 |
|
| 20 |
struct socket * |
| 21 |
solookup(head, laddr, lport, faddr, fport) |
| 22 |
struct socket *head; |
| 23 |
struct in_addr laddr; |
| 24 |
u_int lport; |
| 25 |
struct in_addr faddr; |
| 26 |
u_int fport; |
| 27 |
{ |
| 28 |
struct socket *so; |
| 29 |
|
| 30 |
for (so = head->so_next; so != head; so = so->so_next) { |
| 31 |
if (so->so_lport == lport && |
| 32 |
so->so_laddr.s_addr == laddr.s_addr && |
| 33 |
so->so_faddr.s_addr == faddr.s_addr && |
| 34 |
so->so_fport == fport) |
| 35 |
break; |
| 36 |
} |
| 37 |
|
| 38 |
if (so == head) |
| 39 |
return (struct socket *)NULL; |
| 40 |
return so; |
| 41 |
|
| 42 |
} |
| 43 |
|
| 44 |
/* |
| 45 |
* Create a new socket, initialise the fields |
| 46 |
* It is the responsibility of the caller to |
| 47 |
* insque() it into the correct linked-list |
| 48 |
*/ |
| 49 |
struct socket * |
| 50 |
socreate() |
| 51 |
{ |
| 52 |
struct socket *so; |
| 53 |
|
| 54 |
so = (struct socket *)malloc(sizeof(struct socket)); |
| 55 |
if(so) { |
| 56 |
memset(so, 0, sizeof(struct socket)); |
| 57 |
so->so_state = SS_NOFDREF; |
| 58 |
so->s = -1; |
| 59 |
} |
| 60 |
return(so); |
| 61 |
} |
| 62 |
|
| 63 |
/* |
| 64 |
* remque and free a socket, clobber cache |
| 65 |
*/ |
| 66 |
void |
| 67 |
sofree(so) |
| 68 |
struct socket *so; |
| 69 |
{ |
| 70 |
if (so->so_emu==EMU_RSH && so->extra) { |
| 71 |
sofree(so->extra); |
| 72 |
so->extra=NULL; |
| 73 |
} |
| 74 |
if (so == tcp_last_so) |
| 75 |
tcp_last_so = &tcb; |
| 76 |
else if (so == udp_last_so) |
| 77 |
udp_last_so = &udb; |
| 78 |
|
| 79 |
m_free(so->so_m); |
| 80 |
|
| 81 |
if(so->so_next && so->so_prev) |
| 82 |
remque(so); /* crashes if so is not in a queue */ |
| 83 |
|
| 84 |
free(so); |
| 85 |
} |
| 86 |
|
| 87 |
/* |
| 88 |
* Read from so's socket into sb_snd, updating all relevant sbuf fields |
| 89 |
* NOTE: This will only be called if it is select()ed for reading, so |
| 90 |
* a read() of 0 (or less) means it's disconnected |
| 91 |
*/ |
| 92 |
int |
| 93 |
soread(so) |
| 94 |
struct socket *so; |
| 95 |
{ |
| 96 |
int n, nn, lss, total; |
| 97 |
struct sbuf *sb = &so->so_snd; |
| 98 |
int len = sb->sb_datalen - sb->sb_cc; |
| 99 |
struct iovec iov[2]; |
| 100 |
int mss = so->so_tcpcb->t_maxseg; |
| 101 |
|
| 102 |
DEBUG_CALL("soread"); |
| 103 |
DEBUG_ARG("so = %lx", (long )so); |
| 104 |
|
| 105 |
/* |
| 106 |
* No need to check if there's enough room to read. |
| 107 |
* soread wouldn't have been called if there weren't |
| 108 |
*/ |
| 109 |
|
| 110 |
len = sb->sb_datalen - sb->sb_cc; |
| 111 |
|
| 112 |
iov[0].iov_base = sb->sb_wptr; |
| 113 |
if (sb->sb_wptr < sb->sb_rptr) { |
| 114 |
iov[0].iov_len = sb->sb_rptr - sb->sb_wptr; |
| 115 |
/* Should never succeed, but... */ |
| 116 |
if (iov[0].iov_len > len) |
| 117 |
iov[0].iov_len = len; |
| 118 |
if (iov[0].iov_len > mss) |
| 119 |
iov[0].iov_len -= iov[0].iov_len%mss; |
| 120 |
n = 1; |
| 121 |
} else { |
| 122 |
iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_wptr; |
| 123 |
/* Should never succeed, but... */ |
| 124 |
if (iov[0].iov_len > len) iov[0].iov_len = len; |
| 125 |
len -= iov[0].iov_len; |
| 126 |
if (len) { |
| 127 |
iov[1].iov_base = sb->sb_data; |
| 128 |
iov[1].iov_len = sb->sb_rptr - sb->sb_data; |
| 129 |
if(iov[1].iov_len > len) |
| 130 |
iov[1].iov_len = len; |
| 131 |
total = iov[0].iov_len + iov[1].iov_len; |
| 132 |
if (total > mss) { |
| 133 |
lss = total%mss; |
| 134 |
if (iov[1].iov_len > lss) { |
| 135 |
iov[1].iov_len -= lss; |
| 136 |
n = 2; |
| 137 |
} else { |
| 138 |
lss -= iov[1].iov_len; |
| 139 |
iov[0].iov_len -= lss; |
| 140 |
n = 1; |
| 141 |
} |
| 142 |
} else |
| 143 |
n = 2; |
| 144 |
} else { |
| 145 |
if (iov[0].iov_len > mss) |
| 146 |
iov[0].iov_len -= iov[0].iov_len%mss; |
| 147 |
n = 1; |
| 148 |
} |
| 149 |
} |
| 150 |
|
| 151 |
#ifdef HAVE_READV |
| 152 |
nn = readv(so->s, (struct iovec *)iov, n); |
| 153 |
DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn)); |
| 154 |
#else |
| 155 |
nn = recv(so->s, iov[0].iov_base, iov[0].iov_len,0); |
| 156 |
#endif |
| 157 |
if (nn <= 0) { |
| 158 |
if (nn < 0 && (errno == EINTR || errno == EAGAIN)) |
| 159 |
return 0; |
| 160 |
else { |
| 161 |
DEBUG_MISC((dfd, " --- soread() disconnected, nn = %d, errno = %d-%s\n", nn, errno,strerror(errno))); |
| 162 |
sofcantrcvmore(so); |
| 163 |
tcp_sockclosed(sototcpcb(so)); |
| 164 |
return -1; |
| 165 |
} |
| 166 |
} |
| 167 |
|
| 168 |
#ifndef HAVE_READV |
| 169 |
/* |
| 170 |
* If there was no error, try and read the second time round |
| 171 |
* We read again if n = 2 (ie, there's another part of the buffer) |
| 172 |
* and we read as much as we could in the first read |
| 173 |
* We don't test for <= 0 this time, because there legitimately |
| 174 |
* might not be any more data (since the socket is non-blocking), |
| 175 |
* a close will be detected on next iteration. |
| 176 |
* A return of -1 wont (shouldn't) happen, since it didn't happen above |
| 177 |
*/ |
| 178 |
if (n == 2 && nn == iov[0].iov_len) { |
| 179 |
int ret; |
| 180 |
ret = recv(so->s, iov[1].iov_base, iov[1].iov_len,0); |
| 181 |
if (ret > 0) |
| 182 |
nn += ret; |
| 183 |
} |
| 184 |
|
| 185 |
DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn)); |
| 186 |
#endif |
| 187 |
|
| 188 |
/* Update fields */ |
| 189 |
sb->sb_cc += nn; |
| 190 |
sb->sb_wptr += nn; |
| 191 |
if (sb->sb_wptr >= (sb->sb_data + sb->sb_datalen)) |
| 192 |
sb->sb_wptr -= sb->sb_datalen; |
| 193 |
return nn; |
| 194 |
} |
| 195 |
|
| 196 |
/* |
| 197 |
* Get urgent data |
| 198 |
* |
| 199 |
* When the socket is created, we set it SO_OOBINLINE, |
| 200 |
* so when OOB data arrives, we soread() it and everything |
| 201 |
* in the send buffer is sent as urgent data |
| 202 |
*/ |
| 203 |
void |
| 204 |
sorecvoob(so) |
| 205 |
struct socket *so; |
| 206 |
{ |
| 207 |
struct tcpcb *tp = sototcpcb(so); |
| 208 |
|
| 209 |
DEBUG_CALL("sorecvoob"); |
| 210 |
DEBUG_ARG("so = %lx", (long)so); |
| 211 |
|
| 212 |
/* |
| 213 |
* We take a guess at how much urgent data has arrived. |
| 214 |
* In most situations, when urgent data arrives, the next |
| 215 |
* read() should get all the urgent data. This guess will |
| 216 |
* be wrong however if more data arrives just after the |
| 217 |
* urgent data, or the read() doesn't return all the |
| 218 |
* urgent data. |
| 219 |
*/ |
| 220 |
soread(so); |
| 221 |
tp->snd_up = tp->snd_una + so->so_snd.sb_cc; |
| 222 |
tp->t_force = 1; |
| 223 |
tcp_output(tp); |
| 224 |
tp->t_force = 0; |
| 225 |
} |
| 226 |
|
| 227 |
/* |
| 228 |
* Send urgent data |
| 229 |
* There's a lot duplicated code here, but... |
| 230 |
*/ |
| 231 |
int |
| 232 |
sosendoob(so) |
| 233 |
struct socket *so; |
| 234 |
{ |
| 235 |
struct sbuf *sb = &so->so_rcv; |
| 236 |
char buff[2048]; /* XXX Shouldn't be sending more oob data than this */ |
| 237 |
|
| 238 |
int n, len; |
| 239 |
|
| 240 |
DEBUG_CALL("sosendoob"); |
| 241 |
DEBUG_ARG("so = %lx", (long)so); |
| 242 |
DEBUG_ARG("sb->sb_cc = %d", sb->sb_cc); |
| 243 |
|
| 244 |
if (so->so_urgc > 2048) |
| 245 |
so->so_urgc = 2048; /* XXXX */ |
| 246 |
|
| 247 |
if (sb->sb_rptr < sb->sb_wptr) { |
| 248 |
/* We can send it directly */ |
| 249 |
n = send(so->s, sb->sb_rptr, so->so_urgc, (MSG_OOB)); /* |MSG_DONTWAIT)); */ |
| 250 |
so->so_urgc -= n; |
| 251 |
|
| 252 |
DEBUG_MISC((dfd, " --- sent %d bytes urgent data, %d urgent bytes left\n", n, so->so_urgc)); |
| 253 |
} else { |
| 254 |
/* |
| 255 |
* Since there's no sendv or sendtov like writev, |
| 256 |
* we must copy all data to a linear buffer then |
| 257 |
* send it all |
| 258 |
*/ |
| 259 |
len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr; |
| 260 |
if (len > so->so_urgc) len = so->so_urgc; |
| 261 |
memcpy(buff, sb->sb_rptr, len); |
| 262 |
so->so_urgc -= len; |
| 263 |
if (so->so_urgc) { |
| 264 |
n = sb->sb_wptr - sb->sb_data; |
| 265 |
if (n > so->so_urgc) n = so->so_urgc; |
| 266 |
memcpy((buff + len), sb->sb_data, n); |
| 267 |
so->so_urgc -= n; |
| 268 |
len += n; |
| 269 |
} |
| 270 |
n = send(so->s, buff, len, (MSG_OOB)); /* |MSG_DONTWAIT)); */ |
| 271 |
#ifdef DEBUG |
| 272 |
if (n != len) |
| 273 |
DEBUG_ERROR((dfd, "Didn't send all data urgently XXXXX\n")); |
| 274 |
#endif |
| 275 |
DEBUG_MISC((dfd, " ---2 sent %d bytes urgent data, %d urgent bytes left\n", n, so->so_urgc)); |
| 276 |
} |
| 277 |
|
| 278 |
sb->sb_cc -= n; |
| 279 |
sb->sb_rptr += n; |
| 280 |
if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen)) |
| 281 |
sb->sb_rptr -= sb->sb_datalen; |
| 282 |
|
| 283 |
return n; |
| 284 |
} |
| 285 |
|
| 286 |
/* |
| 287 |
* Write data from so_rcv to so's socket, |
| 288 |
* updating all sbuf field as necessary |
| 289 |
*/ |
| 290 |
int |
| 291 |
sowrite(so) |
| 292 |
struct socket *so; |
| 293 |
{ |
| 294 |
int n,nn; |
| 295 |
struct sbuf *sb = &so->so_rcv; |
| 296 |
int len = sb->sb_cc; |
| 297 |
struct iovec iov[2]; |
| 298 |
|
| 299 |
DEBUG_CALL("sowrite"); |
| 300 |
DEBUG_ARG("so = %lx", (long)so); |
| 301 |
|
| 302 |
if (so->so_urgc) { |
| 303 |
sosendoob(so); |
| 304 |
if (sb->sb_cc == 0) |
| 305 |
return 0; |
| 306 |
} |
| 307 |
|
| 308 |
/* |
| 309 |
* No need to check if there's something to write, |
| 310 |
* sowrite wouldn't have been called otherwise |
| 311 |
*/ |
| 312 |
|
| 313 |
len = sb->sb_cc; |
| 314 |
|
| 315 |
iov[0].iov_base = sb->sb_rptr; |
| 316 |
if (sb->sb_rptr < sb->sb_wptr) { |
| 317 |
iov[0].iov_len = sb->sb_wptr - sb->sb_rptr; |
| 318 |
/* Should never succeed, but... */ |
| 319 |
if (iov[0].iov_len > len) iov[0].iov_len = len; |
| 320 |
n = 1; |
| 321 |
} else { |
| 322 |
iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr; |
| 323 |
if (iov[0].iov_len > len) iov[0].iov_len = len; |
| 324 |
len -= iov[0].iov_len; |
| 325 |
if (len) { |
| 326 |
iov[1].iov_base = sb->sb_data; |
| 327 |
iov[1].iov_len = sb->sb_wptr - sb->sb_data; |
| 328 |
if (iov[1].iov_len > len) iov[1].iov_len = len; |
| 329 |
n = 2; |
| 330 |
} else |
| 331 |
n = 1; |
| 332 |
} |
| 333 |
/* Check if there's urgent data to send, and if so, send it */ |
| 334 |
|
| 335 |
#ifdef HAVE_READV |
| 336 |
nn = writev(so->s, (const struct iovec *)iov, n); |
| 337 |
|
| 338 |
DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn)); |
| 339 |
#else |
| 340 |
nn = send(so->s, iov[0].iov_base, iov[0].iov_len,0); |
| 341 |
#endif |
| 342 |
/* This should never happen, but people tell me it does *shrug* */ |
| 343 |
if (nn < 0 && (errno == EAGAIN || errno == EINTR)) |
| 344 |
return 0; |
| 345 |
|
| 346 |
if (nn <= 0) { |
| 347 |
DEBUG_MISC((dfd, " --- sowrite disconnected, so->so_state = %x, errno = %d\n", |
| 348 |
so->so_state, errno)); |
| 349 |
sofcantsendmore(so); |
| 350 |
tcp_sockclosed(sototcpcb(so)); |
| 351 |
return -1; |
| 352 |
} |
| 353 |
|
| 354 |
#ifndef HAVE_READV |
| 355 |
if (n == 2 && nn == iov[0].iov_len) { |
| 356 |
int ret; |
| 357 |
ret = send(so->s, iov[1].iov_base, iov[1].iov_len,0); |
| 358 |
if (ret > 0) |
| 359 |
nn += ret; |
| 360 |
} |
| 361 |
DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn)); |
| 362 |
#endif |
| 363 |
|
| 364 |
/* Update sbuf */ |
| 365 |
sb->sb_cc -= nn; |
| 366 |
sb->sb_rptr += nn; |
| 367 |
if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen)) |
| 368 |
sb->sb_rptr -= sb->sb_datalen; |
| 369 |
|
| 370 |
/* |
| 371 |
* If in DRAIN mode, and there's no more data, set |
| 372 |
* it CANTSENDMORE |
| 373 |
*/ |
| 374 |
if ((so->so_state & SS_FWDRAIN) && sb->sb_cc == 0) |
| 375 |
sofcantsendmore(so); |
| 376 |
|
| 377 |
return nn; |
| 378 |
} |
| 379 |
|
| 380 |
/* |
| 381 |
* recvfrom() a UDP socket |
| 382 |
*/ |
| 383 |
void |
| 384 |
sorecvfrom(so) |
| 385 |
struct socket *so; |
| 386 |
{ |
| 387 |
struct sockaddr_in addr; |
| 388 |
socklen_t addrlen = sizeof(struct sockaddr_in); |
| 389 |
|
| 390 |
DEBUG_CALL("sorecvfrom"); |
| 391 |
DEBUG_ARG("so = %lx", (long)so); |
| 392 |
|
| 393 |
if (so->so_type == IPPROTO_ICMP) { /* This is a "ping" reply */ |
| 394 |
char buff[256]; |
| 395 |
int len; |
| 396 |
|
| 397 |
len = recvfrom(so->s, buff, 256, 0, |
| 398 |
(struct sockaddr *)&addr, &addrlen); |
| 399 |
/* XXX Check if reply is "correct"? */ |
| 400 |
|
| 401 |
if(len == -1 || len == 0) { |
| 402 |
u_char code=ICMP_UNREACH_PORT; |
| 403 |
|
| 404 |
if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST; |
| 405 |
else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET; |
| 406 |
|
| 407 |
DEBUG_MISC((dfd," udp icmp rx errno = %d-%s\n", |
| 408 |
errno,strerror(errno))); |
| 409 |
icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno)); |
| 410 |
} else { |
| 411 |
icmp_reflect(so->so_m); |
| 412 |
so->so_m = 0; /* Don't m_free() it again! */ |
| 413 |
} |
| 414 |
/* No need for this socket anymore, udp_detach it */ |
| 415 |
udp_detach(so); |
| 416 |
} else { /* A "normal" UDP packet */ |
| 417 |
struct mbuf *m; |
| 418 |
int len; |
| 419 |
ioctlsockopt_t n; |
| 420 |
|
| 421 |
if (!(m = m_get())) return; |
| 422 |
m->m_data += if_maxlinkhdr; |
| 423 |
|
| 424 |
/* |
| 425 |
* XXX Shouldn't FIONREAD packets destined for port 53, |
| 426 |
* but I don't know the max packet size for DNS lookups |
| 427 |
*/ |
| 428 |
len = M_FREEROOM(m); |
| 429 |
/* if (so->so_fport != htons(53)) { */ |
| 430 |
ioctlsocket(so->s, FIONREAD, &n); |
| 431 |
|
| 432 |
if (n > len) { |
| 433 |
n = (m->m_data - m->m_dat) + m->m_len + n + 1; |
| 434 |
m_inc(m, n); |
| 435 |
len = M_FREEROOM(m); |
| 436 |
} |
| 437 |
/* } */ |
| 438 |
|
| 439 |
m->m_len = recvfrom(so->s, m->m_data, len, 0, |
| 440 |
(struct sockaddr *)&addr, &addrlen); |
| 441 |
DEBUG_MISC((dfd, " did recvfrom %d, errno = %d-%s\n", |
| 442 |
m->m_len, errno,strerror(errno))); |
| 443 |
if(m->m_len<0) { |
| 444 |
u_char code=ICMP_UNREACH_PORT; |
| 445 |
|
| 446 |
if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST; |
| 447 |
else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET; |
| 448 |
|
| 449 |
DEBUG_MISC((dfd," rx error, tx icmp ICMP_UNREACH:%i\n", code)); |
| 450 |
icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno)); |
| 451 |
m_free(m); |
| 452 |
} else { |
| 453 |
/* |
| 454 |
* Hack: domain name lookup will be used the most for UDP, |
| 455 |
* and since they'll only be used once there's no need |
| 456 |
* for the 4 minute (or whatever) timeout... So we time them |
| 457 |
* out much quicker (10 seconds for now...) |
| 458 |
*/ |
| 459 |
if (so->so_expire) { |
| 460 |
if (so->so_fport == htons(53)) |
| 461 |
so->so_expire = curtime + SO_EXPIREFAST; |
| 462 |
else |
| 463 |
so->so_expire = curtime + SO_EXPIRE; |
| 464 |
} |
| 465 |
|
| 466 |
/* if (m->m_len == len) { |
| 467 |
* m_inc(m, MINCSIZE); |
| 468 |
* m->m_len = 0; |
| 469 |
* } |
| 470 |
*/ |
| 471 |
|
| 472 |
/* |
| 473 |
* If this packet was destined for CTL_ADDR, |
| 474 |
* make it look like that's where it came from, done by udp_output |
| 475 |
*/ |
| 476 |
udp_output(so, m, &addr); |
| 477 |
} /* rx error */ |
| 478 |
} /* if ping packet */ |
| 479 |
} |
| 480 |
|
| 481 |
/* |
| 482 |
* sendto() a socket |
| 483 |
*/ |
| 484 |
int |
| 485 |
sosendto(so, m) |
| 486 |
struct socket *so; |
| 487 |
struct mbuf *m; |
| 488 |
{ |
| 489 |
int ret; |
| 490 |
struct sockaddr_in addr; |
| 491 |
|
| 492 |
DEBUG_CALL("sosendto"); |
| 493 |
DEBUG_ARG("so = %lx", (long)so); |
| 494 |
DEBUG_ARG("m = %lx", (long)m); |
| 495 |
|
| 496 |
addr.sin_family = AF_INET; |
| 497 |
if ((so->so_faddr.s_addr & htonl(0xffffff00)) == special_addr.s_addr) { |
| 498 |
/* It's an alias */ |
| 499 |
switch(ntohl(so->so_faddr.s_addr) & 0xff) { |
| 500 |
case CTL_DNS: |
| 501 |
addr.sin_addr = dns_addr; |
| 502 |
break; |
| 503 |
case CTL_ALIAS: |
| 504 |
default: |
| 505 |
addr.sin_addr = loopback_addr; |
| 506 |
break; |
| 507 |
} |
| 508 |
} else |
| 509 |
addr.sin_addr = so->so_faddr; |
| 510 |
addr.sin_port = so->so_fport; |
| 511 |
|
| 512 |
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))); |
| 513 |
|
| 514 |
/* Don't care what port we get */ |
| 515 |
ret = sendto(so->s, m->m_data, m->m_len, 0, |
| 516 |
(struct sockaddr *)&addr, sizeof (struct sockaddr)); |
| 517 |
if (ret < 0) |
| 518 |
return -1; |
| 519 |
|
| 520 |
/* |
| 521 |
* Kill the socket if there's no reply in 4 minutes, |
| 522 |
* but only if it's an expirable socket |
| 523 |
*/ |
| 524 |
if (so->so_expire) |
| 525 |
so->so_expire = curtime + SO_EXPIRE; |
| 526 |
so->so_state = SS_ISFCONNECTED; /* So that it gets select()ed */ |
| 527 |
return 0; |
| 528 |
} |
| 529 |
|
| 530 |
/* |
| 531 |
* XXX This should really be tcp_listen |
| 532 |
*/ |
| 533 |
struct socket * |
| 534 |
solisten(port, laddr, lport, flags) |
| 535 |
u_int port; |
| 536 |
u_int32_t laddr; |
| 537 |
u_int lport; |
| 538 |
int flags; |
| 539 |
{ |
| 540 |
struct sockaddr_in addr; |
| 541 |
struct socket *so; |
| 542 |
int s; |
| 543 |
socklen_t addrlen = sizeof(addr); |
| 544 |
int opt = 1; |
| 545 |
|
| 546 |
DEBUG_CALL("solisten"); |
| 547 |
DEBUG_ARG("port = %d", port); |
| 548 |
DEBUG_ARG("laddr = %x", laddr); |
| 549 |
DEBUG_ARG("lport = %d", lport); |
| 550 |
DEBUG_ARG("flags = %x", flags); |
| 551 |
|
| 552 |
if ((so = socreate()) == NULL) { |
| 553 |
/* free(so); Not sofree() ??? free(NULL) == NOP */ |
| 554 |
return NULL; |
| 555 |
} |
| 556 |
|
| 557 |
/* Don't tcp_attach... we don't need so_snd nor so_rcv */ |
| 558 |
if ((so->so_tcpcb = tcp_newtcpcb(so)) == NULL) { |
| 559 |
free(so); |
| 560 |
return NULL; |
| 561 |
} |
| 562 |
insque(so,&tcb); |
| 563 |
|
| 564 |
/* |
| 565 |
* SS_FACCEPTONCE sockets must time out. |
| 566 |
*/ |
| 567 |
if (flags & SS_FACCEPTONCE) |
| 568 |
so->so_tcpcb->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT*2; |
| 569 |
|
| 570 |
so->so_state = (SS_FACCEPTCONN|flags); |
| 571 |
so->so_lport = lport; /* Kept in network format */ |
| 572 |
so->so_laddr.s_addr = laddr; /* Ditto */ |
| 573 |
|
| 574 |
addr.sin_family = AF_INET; |
| 575 |
addr.sin_addr.s_addr = INADDR_ANY; |
| 576 |
addr.sin_port = port; |
| 577 |
|
| 578 |
if (((s = socket(AF_INET,SOCK_STREAM,0)) < 0) || |
| 579 |
(setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int)) < 0) || |
| 580 |
(bind(s,(struct sockaddr *)&addr, sizeof(addr)) < 0) || |
| 581 |
(listen(s,1) < 0)) { |
| 582 |
int tmperrno = errno; /* Don't clobber the real reason we failed */ |
| 583 |
|
| 584 |
close(s); |
| 585 |
sofree(so); |
| 586 |
/* Restore the real errno */ |
| 587 |
#ifdef _WIN32 |
| 588 |
WSASetLastError(tmperrno); |
| 589 |
#else |
| 590 |
errno = tmperrno; |
| 591 |
#endif |
| 592 |
return NULL; |
| 593 |
} |
| 594 |
setsockopt(s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int)); |
| 595 |
|
| 596 |
getsockname(s,(struct sockaddr *)&addr,&addrlen); |
| 597 |
so->so_fport = addr.sin_port; |
| 598 |
if (addr.sin_addr.s_addr == 0 || addr.sin_addr.s_addr == loopback_addr.s_addr) |
| 599 |
so->so_faddr = our_addr; |
| 600 |
else |
| 601 |
so->so_faddr = addr.sin_addr; |
| 602 |
|
| 603 |
so->s = s; |
| 604 |
return so; |
| 605 |
} |
| 606 |
|
| 607 |
/* |
| 608 |
* Data is available in so_rcv |
| 609 |
* Just write() the data to the socket |
| 610 |
* XXX not yet... |
| 611 |
*/ |
| 612 |
void |
| 613 |
sorwakeup(so) |
| 614 |
struct socket *so; |
| 615 |
{ |
| 616 |
/* sowrite(so); */ |
| 617 |
/* FD_CLR(so->s,&writefds); */ |
| 618 |
} |
| 619 |
|
| 620 |
/* |
| 621 |
* Data has been freed in so_snd |
| 622 |
* We have room for a read() if we want to |
| 623 |
* For now, don't read, it'll be done in the main loop |
| 624 |
*/ |
| 625 |
void |
| 626 |
sowwakeup(so) |
| 627 |
struct socket *so; |
| 628 |
{ |
| 629 |
/* Nothing, yet */ |
| 630 |
} |
| 631 |
|
| 632 |
/* |
| 633 |
* Various session state calls |
| 634 |
* XXX Should be #define's |
| 635 |
* The socket state stuff needs work, these often get call 2 or 3 |
| 636 |
* times each when only 1 was needed |
| 637 |
*/ |
| 638 |
void |
| 639 |
soisfconnecting(so) |
| 640 |
register struct socket *so; |
| 641 |
{ |
| 642 |
so->so_state &= ~(SS_NOFDREF|SS_ISFCONNECTED|SS_FCANTRCVMORE| |
| 643 |
SS_FCANTSENDMORE|SS_FWDRAIN); |
| 644 |
so->so_state |= SS_ISFCONNECTING; /* Clobber other states */ |
| 645 |
} |
| 646 |
|
| 647 |
void |
| 648 |
soisfconnected(so) |
| 649 |
register struct socket *so; |
| 650 |
{ |
| 651 |
so->so_state &= ~(SS_ISFCONNECTING|SS_FWDRAIN|SS_NOFDREF); |
| 652 |
so->so_state |= SS_ISFCONNECTED; /* Clobber other states */ |
| 653 |
} |
| 654 |
|
| 655 |
void |
| 656 |
sofcantrcvmore(so) |
| 657 |
struct socket *so; |
| 658 |
{ |
| 659 |
if ((so->so_state & SS_NOFDREF) == 0) { |
| 660 |
shutdown(so->s,0); |
| 661 |
if(global_writefds) { |
| 662 |
FD_CLR(so->s,global_writefds); |
| 663 |
} |
| 664 |
} |
| 665 |
so->so_state &= ~(SS_ISFCONNECTING); |
| 666 |
if (so->so_state & SS_FCANTSENDMORE) |
| 667 |
so->so_state = SS_NOFDREF; /* Don't select it */ /* XXX close() here as well? */ |
| 668 |
else |
| 669 |
so->so_state |= SS_FCANTRCVMORE; |
| 670 |
} |
| 671 |
|
| 672 |
void |
| 673 |
sofcantsendmore(so) |
| 674 |
struct socket *so; |
| 675 |
{ |
| 676 |
if ((so->so_state & SS_NOFDREF) == 0) { |
| 677 |
shutdown(so->s,1); /* send FIN to fhost */ |
| 678 |
if (global_readfds) { |
| 679 |
FD_CLR(so->s,global_readfds); |
| 680 |
} |
| 681 |
if (global_xfds) { |
| 682 |
FD_CLR(so->s,global_xfds); |
| 683 |
} |
| 684 |
} |
| 685 |
so->so_state &= ~(SS_ISFCONNECTING); |
| 686 |
if (so->so_state & SS_FCANTRCVMORE) |
| 687 |
so->so_state = SS_NOFDREF; /* as above */ |
| 688 |
else |
| 689 |
so->so_state |= SS_FCANTSENDMORE; |
| 690 |
} |
| 691 |
|
| 692 |
void |
| 693 |
soisfdisconnected(so) |
| 694 |
struct socket *so; |
| 695 |
{ |
| 696 |
/* so->so_state &= ~(SS_ISFCONNECTING|SS_ISFCONNECTED); */ |
| 697 |
/* close(so->s); */ |
| 698 |
/* so->so_state = SS_ISFDISCONNECTED; */ |
| 699 |
/* |
| 700 |
* XXX Do nothing ... ? |
| 701 |
*/ |
| 702 |
} |
| 703 |
|
| 704 |
/* |
| 705 |
* Set write drain mode |
| 706 |
* Set CANTSENDMORE once all data has been write()n |
| 707 |
*/ |
| 708 |
void |
| 709 |
sofwdrain(so) |
| 710 |
struct socket *so; |
| 711 |
{ |
| 712 |
if (so->so_rcv.sb_cc) |
| 713 |
so->so_state |= SS_FWDRAIN; |
| 714 |
else |
| 715 |
sofcantsendmore(so); |
| 716 |
} |
| 717 |
|
