2 * Copyright (c) 1995 Danny Gasparovski.
4 * Please read the file COPYRIGHT for the
5 * terms and conditions of the copyright.
8 #define WANT_SYS_IOCTL_H
12 #include <sys/filio.h>
14 #include "qemu-common.h"
16 static void sofcantrcvmore(struct socket *so);
17 static void sofcantsendmore(struct socket *so);
28 solookup(head, laddr, lport, faddr, fport)
37 for (so = head->so_next; so != head; so = so->so_next) {
38 if (so->so_lport == lport &&
39 so->so_laddr.s_addr == laddr.s_addr &&
40 so->so_faddr.s_addr == faddr.s_addr &&
41 so->so_fport == fport)
46 return (struct socket *)NULL;
52 * Create a new socket, initialise the fields
53 * It is the responsibility of the caller to
54 * insque() it into the correct linked-list
61 so = (struct socket *)malloc(sizeof(struct socket));
63 memset(so, 0, sizeof(struct socket));
64 so->so_state = SS_NOFDREF;
71 * remque and free a socket, clobber cache
77 if (so->so_emu==EMU_RSH && so->extra) {
81 if (so == tcp_last_so)
83 else if (so == udp_last_so)
88 if(so->so_next && so->so_prev)
89 remque(so); /* crashes if so is not in a queue */
95 * Read from so's socket into sb_snd, updating all relevant sbuf fields
96 * NOTE: This will only be called if it is select()ed for reading, so
97 * a read() of 0 (or less) means it's disconnected
103 int n, nn, lss, total;
104 struct sbuf *sb = &so->so_snd;
105 int len = sb->sb_datalen - sb->sb_cc;
107 int mss = so->so_tcpcb->t_maxseg;
109 DEBUG_CALL("soread");
110 DEBUG_ARG("so = %lx", (long )so);
113 * No need to check if there's enough room to read.
114 * soread wouldn't have been called if there weren't
117 len = sb->sb_datalen - sb->sb_cc;
119 iov[0].iov_base = sb->sb_wptr;
120 iov[1].iov_base = NULL;
122 if (sb->sb_wptr < sb->sb_rptr) {
123 iov[0].iov_len = sb->sb_rptr - sb->sb_wptr;
124 /* Should never succeed, but... */
125 if (iov[0].iov_len > len)
126 iov[0].iov_len = len;
127 if (iov[0].iov_len > mss)
128 iov[0].iov_len -= iov[0].iov_len%mss;
131 iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_wptr;
132 /* Should never succeed, but... */
133 if (iov[0].iov_len > len) iov[0].iov_len = len;
134 len -= iov[0].iov_len;
136 iov[1].iov_base = sb->sb_data;
137 iov[1].iov_len = sb->sb_rptr - sb->sb_data;
138 if(iov[1].iov_len > len)
139 iov[1].iov_len = len;
140 total = iov[0].iov_len + iov[1].iov_len;
143 if (iov[1].iov_len > lss) {
144 iov[1].iov_len -= lss;
147 lss -= iov[1].iov_len;
148 iov[0].iov_len -= lss;
154 if (iov[0].iov_len > mss)
155 iov[0].iov_len -= iov[0].iov_len%mss;
161 nn = readv(so->s, (struct iovec *)iov, n);
162 DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn));
164 nn = recv(so->s, iov[0].iov_base, iov[0].iov_len,0);
167 if (nn < 0 && (errno == EINTR || errno == EAGAIN))
170 DEBUG_MISC((dfd, " --- soread() disconnected, nn = %d, errno = %d-%s\n", nn, errno,strerror(errno)));
172 tcp_sockclosed(sototcpcb(so));
179 * If there was no error, try and read the second time round
180 * We read again if n = 2 (ie, there's another part of the buffer)
181 * and we read as much as we could in the first read
182 * We don't test for <= 0 this time, because there legitimately
183 * might not be any more data (since the socket is non-blocking),
184 * a close will be detected on next iteration.
185 * A return of -1 wont (shouldn't) happen, since it didn't happen above
187 if (n == 2 && nn == iov[0].iov_len) {
189 ret = recv(so->s, iov[1].iov_base, iov[1].iov_len,0);
194 DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn));
200 if (sb->sb_wptr >= (sb->sb_data + sb->sb_datalen))
201 sb->sb_wptr -= sb->sb_datalen;
208 * When the socket is created, we set it SO_OOBINLINE,
209 * so when OOB data arrives, we soread() it and everything
210 * in the send buffer is sent as urgent data
216 struct tcpcb *tp = sototcpcb(so);
218 DEBUG_CALL("sorecvoob");
219 DEBUG_ARG("so = %lx", (long)so);
222 * We take a guess at how much urgent data has arrived.
223 * In most situations, when urgent data arrives, the next
224 * read() should get all the urgent data. This guess will
225 * be wrong however if more data arrives just after the
226 * urgent data, or the read() doesn't return all the
230 tp->snd_up = tp->snd_una + so->so_snd.sb_cc;
238 * There's a lot duplicated code here, but...
244 struct sbuf *sb = &so->so_rcv;
245 char buff[2048]; /* XXX Shouldn't be sending more oob data than this */
249 DEBUG_CALL("sosendoob");
250 DEBUG_ARG("so = %lx", (long)so);
251 DEBUG_ARG("sb->sb_cc = %d", sb->sb_cc);
253 if (so->so_urgc > 2048)
254 so->so_urgc = 2048; /* XXXX */
256 if (sb->sb_rptr < sb->sb_wptr) {
257 /* We can send it directly */
258 n = send(so->s, sb->sb_rptr, so->so_urgc, (MSG_OOB)); /* |MSG_DONTWAIT)); */
261 DEBUG_MISC((dfd, " --- sent %d bytes urgent data, %d urgent bytes left\n", n, so->so_urgc));
264 * Since there's no sendv or sendtov like writev,
265 * we must copy all data to a linear buffer then
268 len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr;
269 if (len > so->so_urgc) len = so->so_urgc;
270 memcpy(buff, sb->sb_rptr, len);
273 n = sb->sb_wptr - sb->sb_data;
274 if (n > so->so_urgc) n = so->so_urgc;
275 memcpy((buff + len), sb->sb_data, n);
279 n = send(so->s, buff, len, (MSG_OOB)); /* |MSG_DONTWAIT)); */
282 DEBUG_ERROR((dfd, "Didn't send all data urgently XXXXX\n"));
284 DEBUG_MISC((dfd, " ---2 sent %d bytes urgent data, %d urgent bytes left\n", n, so->so_urgc));
289 if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen))
290 sb->sb_rptr -= sb->sb_datalen;
296 * Write data from so_rcv to so's socket,
297 * updating all sbuf field as necessary
304 struct sbuf *sb = &so->so_rcv;
308 DEBUG_CALL("sowrite");
309 DEBUG_ARG("so = %lx", (long)so);
318 * No need to check if there's something to write,
319 * sowrite wouldn't have been called otherwise
324 iov[0].iov_base = sb->sb_rptr;
325 iov[1].iov_base = NULL;
327 if (sb->sb_rptr < sb->sb_wptr) {
328 iov[0].iov_len = sb->sb_wptr - sb->sb_rptr;
329 /* Should never succeed, but... */
330 if (iov[0].iov_len > len) iov[0].iov_len = len;
333 iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr;
334 if (iov[0].iov_len > len) iov[0].iov_len = len;
335 len -= iov[0].iov_len;
337 iov[1].iov_base = sb->sb_data;
338 iov[1].iov_len = sb->sb_wptr - sb->sb_data;
339 if (iov[1].iov_len > len) iov[1].iov_len = len;
344 /* Check if there's urgent data to send, and if so, send it */
347 nn = writev(so->s, (const struct iovec *)iov, n);
349 DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn));
351 nn = send(so->s, iov[0].iov_base, iov[0].iov_len,0);
353 /* This should never happen, but people tell me it does *shrug* */
354 if (nn < 0 && (errno == EAGAIN || errno == EINTR))
358 DEBUG_MISC((dfd, " --- sowrite disconnected, so->so_state = %x, errno = %d\n",
359 so->so_state, errno));
361 tcp_sockclosed(sototcpcb(so));
366 if (n == 2 && nn == iov[0].iov_len) {
368 ret = send(so->s, iov[1].iov_base, iov[1].iov_len,0);
372 DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn));
378 if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen))
379 sb->sb_rptr -= sb->sb_datalen;
382 * If in DRAIN mode, and there's no more data, set
385 if ((so->so_state & SS_FWDRAIN) && sb->sb_cc == 0)
392 * recvfrom() a UDP socket
398 struct sockaddr_in addr;
399 socklen_t addrlen = sizeof(struct sockaddr_in);
401 DEBUG_CALL("sorecvfrom");
402 DEBUG_ARG("so = %lx", (long)so);
404 if (so->so_type == IPPROTO_ICMP) { /* This is a "ping" reply */
408 len = recvfrom(so->s, buff, 256, 0,
409 (struct sockaddr *)&addr, &addrlen);
410 /* XXX Check if reply is "correct"? */
412 if(len == -1 || len == 0) {
413 u_char code=ICMP_UNREACH_PORT;
415 if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST;
416 else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET;
418 DEBUG_MISC((dfd," udp icmp rx errno = %d-%s\n",
419 errno,strerror(errno)));
420 icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno));
422 icmp_reflect(so->so_m);
423 so->so_m = 0; /* Don't m_free() it again! */
425 /* No need for this socket anymore, udp_detach it */
427 } else { /* A "normal" UDP packet */
431 if (!(m = m_get())) return;
432 m->m_data += IF_MAXLINKHDR;
435 * XXX Shouldn't FIONREAD packets destined for port 53,
436 * but I don't know the max packet size for DNS lookups
439 /* if (so->so_fport != htons(53)) { */
440 ioctlsocket(so->s, FIONREAD, &n);
443 n = (m->m_data - m->m_dat) + m->m_len + n + 1;
449 m->m_len = recvfrom(so->s, m->m_data, len, 0,
450 (struct sockaddr *)&addr, &addrlen);
451 DEBUG_MISC((dfd, " did recvfrom %d, errno = %d-%s\n",
452 m->m_len, errno,strerror(errno)));
454 u_char code=ICMP_UNREACH_PORT;
456 if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST;
457 else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET;
459 DEBUG_MISC((dfd," rx error, tx icmp ICMP_UNREACH:%i\n", code));
460 icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno));
464 * Hack: domain name lookup will be used the most for UDP,
465 * and since they'll only be used once there's no need
466 * for the 4 minute (or whatever) timeout... So we time them
467 * out much quicker (10 seconds for now...)
470 if (so->so_fport == htons(53))
471 so->so_expire = curtime + SO_EXPIREFAST;
473 so->so_expire = curtime + SO_EXPIRE;
476 /* if (m->m_len == len) {
477 * m_inc(m, MINCSIZE);
483 * If this packet was destined for CTL_ADDR,
484 * make it look like that's where it came from, done by udp_output
486 udp_output(so, m, &addr);
488 } /* if ping packet */
500 struct sockaddr_in addr;
502 DEBUG_CALL("sosendto");
503 DEBUG_ARG("so = %lx", (long)so);
504 DEBUG_ARG("m = %lx", (long)m);
506 addr.sin_family = AF_INET;
507 if ((so->so_faddr.s_addr & htonl(0xffffff00)) == special_addr.s_addr) {
509 switch(ntohl(so->so_faddr.s_addr) & 0xff) {
511 addr.sin_addr = dns_addr;
515 addr.sin_addr = loopback_addr;
519 addr.sin_addr = so->so_faddr;
520 addr.sin_port = so->so_fport;
522 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)));
524 /* Don't care what port we get */
525 ret = sendto(so->s, m->m_data, m->m_len, 0,
526 (struct sockaddr *)&addr, sizeof (struct sockaddr));
531 * Kill the socket if there's no reply in 4 minutes,
532 * but only if it's an expirable socket
535 so->so_expire = curtime + SO_EXPIRE;
536 so->so_state = SS_ISFCONNECTED; /* So that it gets select()ed */
541 * XXX This should really be tcp_listen
544 solisten(port, laddr, lport, flags)
550 struct sockaddr_in addr;
553 socklen_t addrlen = sizeof(addr);
555 DEBUG_CALL("solisten");
556 DEBUG_ARG("port = %d", port);
557 DEBUG_ARG("laddr = %x", laddr);
558 DEBUG_ARG("lport = %d", lport);
559 DEBUG_ARG("flags = %x", flags);
561 if ((so = socreate()) == NULL) {
562 /* free(so); Not sofree() ??? free(NULL) == NOP */
566 /* Don't tcp_attach... we don't need so_snd nor so_rcv */
567 if ((so->so_tcpcb = tcp_newtcpcb(so)) == NULL) {
574 * SS_FACCEPTONCE sockets must time out.
576 if (flags & SS_FACCEPTONCE)
577 so->so_tcpcb->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT*2;
579 so->so_state = (SS_FACCEPTCONN|flags);
580 so->so_lport = lport; /* Kept in network format */
581 so->so_laddr.s_addr = laddr; /* Ditto */
583 addr.sin_family = AF_INET;
584 addr.sin_addr.s_addr = INADDR_ANY;
585 addr.sin_port = port;
587 if (((s = socket(AF_INET,SOCK_STREAM,0)) < 0) ||
588 (setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int)) < 0) ||
589 (bind(s,(struct sockaddr *)&addr, sizeof(addr)) < 0) ||
591 int tmperrno = errno; /* Don't clobber the real reason we failed */
595 /* Restore the real errno */
597 WSASetLastError(tmperrno);
603 setsockopt(s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
605 getsockname(s,(struct sockaddr *)&addr,&addrlen);
606 so->so_fport = addr.sin_port;
607 if (addr.sin_addr.s_addr == 0 || addr.sin_addr.s_addr == loopback_addr.s_addr)
608 so->so_faddr = alias_addr;
610 so->so_faddr = addr.sin_addr;
618 * Data is available in so_rcv
619 * Just write() the data to the socket
627 /* FD_CLR(so->s,&writefds); */
631 * Data has been freed in so_snd
632 * We have room for a read() if we want to
633 * For now, don't read, it'll be done in the main loop
644 * Various session state calls
645 * XXX Should be #define's
646 * The socket state stuff needs work, these often get call 2 or 3
647 * times each when only 1 was needed
651 register struct socket *so;
653 so->so_state &= ~(SS_NOFDREF|SS_ISFCONNECTED|SS_FCANTRCVMORE|
654 SS_FCANTSENDMORE|SS_FWDRAIN);
655 so->so_state |= SS_ISFCONNECTING; /* Clobber other states */
660 register struct socket *so;
662 so->so_state &= ~(SS_ISFCONNECTING|SS_FWDRAIN|SS_NOFDREF);
663 so->so_state |= SS_ISFCONNECTED; /* Clobber other states */
667 sofcantrcvmore(struct socket *so)
669 if ((so->so_state & SS_NOFDREF) == 0) {
671 if(global_writefds) {
672 FD_CLR(so->s,global_writefds);
675 so->so_state &= ~(SS_ISFCONNECTING);
676 if (so->so_state & SS_FCANTSENDMORE)
677 so->so_state = SS_NOFDREF; /* Don't select it */ /* XXX close() here as well? */
679 so->so_state |= SS_FCANTRCVMORE;
683 sofcantsendmore(struct socket *so)
685 if ((so->so_state & SS_NOFDREF) == 0) {
686 shutdown(so->s,1); /* send FIN to fhost */
687 if (global_readfds) {
688 FD_CLR(so->s,global_readfds);
691 FD_CLR(so->s,global_xfds);
694 so->so_state &= ~(SS_ISFCONNECTING);
695 if (so->so_state & SS_FCANTRCVMORE)
696 so->so_state = SS_NOFDREF; /* as above */
698 so->so_state |= SS_FCANTSENDMORE;
702 soisfdisconnected(so)
705 /* so->so_state &= ~(SS_ISFCONNECTING|SS_ISFCONNECTED); */
707 /* so->so_state = SS_ISFDISCONNECTED; */
709 * XXX Do nothing ... ?
714 * Set write drain mode
715 * Set CANTSENDMORE once all data has been write()n
721 if (so->so_rcv.sb_cc)
722 so->so_state |= SS_FWDRAIN;