2 * Copyright (c) 1995 Danny Gasparovski.
4 * Please read the file COPYRIGHT for the
5 * terms and conditions of the copyright.
8 #include "qemu-common.h"
9 #define WANT_SYS_IOCTL_H
13 #include <sys/filio.h>
16 static void sofcantrcvmore(struct socket *so);
17 static void sofcantsendmore(struct socket *so);
28 solookup(struct socket *head, struct in_addr laddr, u_int lport,
29 struct in_addr faddr, u_int fport)
33 for (so = head->so_next; so != head; so = so->so_next) {
34 if (so->so_lport == lport &&
35 so->so_laddr.s_addr == laddr.s_addr &&
36 so->so_faddr.s_addr == faddr.s_addr &&
37 so->so_fport == fport)
42 return (struct socket *)NULL;
48 * Create a new socket, initialise the fields
49 * It is the responsibility of the caller to
50 * insque() it into the correct linked-list
57 so = (struct socket *)malloc(sizeof(struct socket));
59 memset(so, 0, sizeof(struct socket));
60 so->so_state = SS_NOFDREF;
67 * remque and free a socket, clobber cache
70 sofree(struct socket *so)
72 if (so->so_emu==EMU_RSH && so->extra) {
76 if (so == tcp_last_so)
78 else if (so == udp_last_so)
83 if(so->so_next && so->so_prev)
84 remque(so); /* crashes if so is not in a queue */
89 size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np)
92 struct sbuf *sb = &so->so_snd;
93 int len = sb->sb_datalen - sb->sb_cc;
94 int mss = so->so_tcpcb->t_maxseg;
96 DEBUG_CALL("sopreprbuf");
97 DEBUG_ARG("so = %lx", (long )so);
99 len = sb->sb_datalen - sb->sb_cc;
104 iov[0].iov_base = sb->sb_wptr;
105 iov[1].iov_base = NULL;
107 if (sb->sb_wptr < sb->sb_rptr) {
108 iov[0].iov_len = sb->sb_rptr - sb->sb_wptr;
109 /* Should never succeed, but... */
110 if (iov[0].iov_len > len)
111 iov[0].iov_len = len;
112 if (iov[0].iov_len > mss)
113 iov[0].iov_len -= iov[0].iov_len%mss;
116 iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_wptr;
117 /* Should never succeed, but... */
118 if (iov[0].iov_len > len) iov[0].iov_len = len;
119 len -= iov[0].iov_len;
121 iov[1].iov_base = sb->sb_data;
122 iov[1].iov_len = sb->sb_rptr - sb->sb_data;
123 if(iov[1].iov_len > len)
124 iov[1].iov_len = len;
125 total = iov[0].iov_len + iov[1].iov_len;
128 if (iov[1].iov_len > lss) {
129 iov[1].iov_len -= lss;
132 lss -= iov[1].iov_len;
133 iov[0].iov_len -= lss;
139 if (iov[0].iov_len > mss)
140 iov[0].iov_len -= iov[0].iov_len%mss;
147 return iov[0].iov_len + (n - 1) * iov[1].iov_len;
151 * Read from so's socket into sb_snd, updating all relevant sbuf fields
152 * NOTE: This will only be called if it is select()ed for reading, so
153 * a read() of 0 (or less) means it's disconnected
156 soread(struct socket *so)
159 struct sbuf *sb = &so->so_snd;
162 DEBUG_CALL("soread");
163 DEBUG_ARG("so = %lx", (long )so);
166 * No need to check if there's enough room to read.
167 * soread wouldn't have been called if there weren't
169 sopreprbuf(so, iov, &n);
172 nn = readv(so->s, (struct iovec *)iov, n);
173 DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn));
175 nn = recv(so->s, iov[0].iov_base, iov[0].iov_len,0);
178 if (nn < 0 && (errno == EINTR || errno == EAGAIN))
181 DEBUG_MISC((dfd, " --- soread() disconnected, nn = %d, errno = %d-%s\n", nn, errno,strerror(errno)));
183 tcp_sockclosed(sototcpcb(so));
190 * If there was no error, try and read the second time round
191 * We read again if n = 2 (ie, there's another part of the buffer)
192 * and we read as much as we could in the first read
193 * We don't test for <= 0 this time, because there legitimately
194 * might not be any more data (since the socket is non-blocking),
195 * a close will be detected on next iteration.
196 * A return of -1 wont (shouldn't) happen, since it didn't happen above
198 if (n == 2 && nn == iov[0].iov_len) {
200 ret = recv(so->s, iov[1].iov_base, iov[1].iov_len,0);
205 DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn));
211 if (sb->sb_wptr >= (sb->sb_data + sb->sb_datalen))
212 sb->sb_wptr -= sb->sb_datalen;
216 int soreadbuf(struct socket *so, const char *buf, int size)
218 int n, nn, copy = size;
219 struct sbuf *sb = &so->so_snd;
222 DEBUG_CALL("soreadbuf");
223 DEBUG_ARG("so = %lx", (long )so);
226 * No need to check if there's enough room to read.
227 * soread wouldn't have been called if there weren't
229 if (sopreprbuf(so, iov, &n) < size)
232 nn = MIN(iov[0].iov_len, copy);
233 memcpy(iov[0].iov_base, buf, nn);
241 memcpy(iov[1].iov_base, buf, copy);
247 if (sb->sb_wptr >= (sb->sb_data + sb->sb_datalen))
248 sb->sb_wptr -= sb->sb_datalen;
253 tcp_sockclosed(sototcpcb(so));
254 fprintf(stderr, "soreadbuf buffer to small");
261 * When the socket is created, we set it SO_OOBINLINE,
262 * so when OOB data arrives, we soread() it and everything
263 * in the send buffer is sent as urgent data
266 sorecvoob(struct socket *so)
268 struct tcpcb *tp = sototcpcb(so);
270 DEBUG_CALL("sorecvoob");
271 DEBUG_ARG("so = %lx", (long)so);
274 * We take a guess at how much urgent data has arrived.
275 * In most situations, when urgent data arrives, the next
276 * read() should get all the urgent data. This guess will
277 * be wrong however if more data arrives just after the
278 * urgent data, or the read() doesn't return all the
282 tp->snd_up = tp->snd_una + so->so_snd.sb_cc;
290 * There's a lot duplicated code here, but...
293 sosendoob(struct socket *so)
295 struct sbuf *sb = &so->so_rcv;
296 char buff[2048]; /* XXX Shouldn't be sending more oob data than this */
300 DEBUG_CALL("sosendoob");
301 DEBUG_ARG("so = %lx", (long)so);
302 DEBUG_ARG("sb->sb_cc = %d", sb->sb_cc);
304 if (so->so_urgc > 2048)
305 so->so_urgc = 2048; /* XXXX */
307 if (sb->sb_rptr < sb->sb_wptr) {
308 /* We can send it directly */
309 n = slirp_send(so, sb->sb_rptr, so->so_urgc, (MSG_OOB)); /* |MSG_DONTWAIT)); */
312 DEBUG_MISC((dfd, " --- sent %d bytes urgent data, %d urgent bytes left\n", n, so->so_urgc));
315 * Since there's no sendv or sendtov like writev,
316 * we must copy all data to a linear buffer then
319 len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr;
320 if (len > so->so_urgc) len = so->so_urgc;
321 memcpy(buff, sb->sb_rptr, len);
324 n = sb->sb_wptr - sb->sb_data;
325 if (n > so->so_urgc) n = so->so_urgc;
326 memcpy((buff + len), sb->sb_data, n);
330 n = slirp_send(so, buff, len, (MSG_OOB)); /* |MSG_DONTWAIT)); */
333 DEBUG_ERROR((dfd, "Didn't send all data urgently XXXXX\n"));
335 DEBUG_MISC((dfd, " ---2 sent %d bytes urgent data, %d urgent bytes left\n", n, so->so_urgc));
340 if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen))
341 sb->sb_rptr -= sb->sb_datalen;
347 * Write data from so_rcv to so's socket,
348 * updating all sbuf field as necessary
351 sowrite(struct socket *so)
354 struct sbuf *sb = &so->so_rcv;
358 DEBUG_CALL("sowrite");
359 DEBUG_ARG("so = %lx", (long)so);
368 * No need to check if there's something to write,
369 * sowrite wouldn't have been called otherwise
374 iov[0].iov_base = sb->sb_rptr;
375 iov[1].iov_base = NULL;
377 if (sb->sb_rptr < sb->sb_wptr) {
378 iov[0].iov_len = sb->sb_wptr - sb->sb_rptr;
379 /* Should never succeed, but... */
380 if (iov[0].iov_len > len) iov[0].iov_len = len;
383 iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr;
384 if (iov[0].iov_len > len) iov[0].iov_len = len;
385 len -= iov[0].iov_len;
387 iov[1].iov_base = sb->sb_data;
388 iov[1].iov_len = sb->sb_wptr - sb->sb_data;
389 if (iov[1].iov_len > len) iov[1].iov_len = len;
394 /* Check if there's urgent data to send, and if so, send it */
397 nn = writev(so->s, (const struct iovec *)iov, n);
399 DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn));
401 nn = slirp_send(so, iov[0].iov_base, iov[0].iov_len,0);
403 /* This should never happen, but people tell me it does *shrug* */
404 if (nn < 0 && (errno == EAGAIN || errno == EINTR))
408 DEBUG_MISC((dfd, " --- sowrite disconnected, so->so_state = %x, errno = %d\n",
409 so->so_state, errno));
411 tcp_sockclosed(sototcpcb(so));
416 if (n == 2 && nn == iov[0].iov_len) {
418 ret = slirp_send(so, iov[1].iov_base, iov[1].iov_len,0);
422 DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn));
428 if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen))
429 sb->sb_rptr -= sb->sb_datalen;
432 * If in DRAIN mode, and there's no more data, set
435 if ((so->so_state & SS_FWDRAIN) && sb->sb_cc == 0)
442 * recvfrom() a UDP socket
445 sorecvfrom(struct socket *so)
447 struct sockaddr_in addr;
448 socklen_t addrlen = sizeof(struct sockaddr_in);
450 DEBUG_CALL("sorecvfrom");
451 DEBUG_ARG("so = %lx", (long)so);
453 if (so->so_type == IPPROTO_ICMP) { /* This is a "ping" reply */
457 len = recvfrom(so->s, buff, 256, 0,
458 (struct sockaddr *)&addr, &addrlen);
459 /* XXX Check if reply is "correct"? */
461 if(len == -1 || len == 0) {
462 u_char code=ICMP_UNREACH_PORT;
464 if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST;
465 else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET;
467 DEBUG_MISC((dfd," udp icmp rx errno = %d-%s\n",
468 errno,strerror(errno)));
469 icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno));
471 icmp_reflect(so->so_m);
472 so->so_m = NULL; /* Don't m_free() it again! */
474 /* No need for this socket anymore, udp_detach it */
476 } else { /* A "normal" UDP packet */
480 if (!(m = m_get())) return;
481 m->m_data += IF_MAXLINKHDR;
484 * XXX Shouldn't FIONREAD packets destined for port 53,
485 * but I don't know the max packet size for DNS lookups
488 /* if (so->so_fport != htons(53)) { */
489 ioctlsocket(so->s, FIONREAD, &n);
492 n = (m->m_data - m->m_dat) + m->m_len + n + 1;
498 m->m_len = recvfrom(so->s, m->m_data, len, 0,
499 (struct sockaddr *)&addr, &addrlen);
500 DEBUG_MISC((dfd, " did recvfrom %d, errno = %d-%s\n",
501 m->m_len, errno,strerror(errno)));
503 u_char code=ICMP_UNREACH_PORT;
505 if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST;
506 else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET;
508 DEBUG_MISC((dfd," rx error, tx icmp ICMP_UNREACH:%i\n", code));
509 icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno));
513 * Hack: domain name lookup will be used the most for UDP,
514 * and since they'll only be used once there's no need
515 * for the 4 minute (or whatever) timeout... So we time them
516 * out much quicker (10 seconds for now...)
519 if (so->so_fport == htons(53))
520 so->so_expire = curtime + SO_EXPIREFAST;
522 so->so_expire = curtime + SO_EXPIRE;
525 /* if (m->m_len == len) {
526 * m_inc(m, MINCSIZE);
532 * If this packet was destined for CTL_ADDR,
533 * make it look like that's where it came from, done by udp_output
535 udp_output(so, m, &addr);
537 } /* if ping packet */
544 sosendto(struct socket *so, struct mbuf *m)
547 struct sockaddr_in addr;
549 DEBUG_CALL("sosendto");
550 DEBUG_ARG("so = %lx", (long)so);
551 DEBUG_ARG("m = %lx", (long)m);
553 addr.sin_family = AF_INET;
554 if ((so->so_faddr.s_addr & htonl(0xffffff00)) == special_addr.s_addr) {
556 switch(ntohl(so->so_faddr.s_addr) & 0xff) {
558 addr.sin_addr = dns_addr;
562 addr.sin_addr = loopback_addr;
566 addr.sin_addr = so->so_faddr;
567 addr.sin_port = so->so_fport;
569 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)));
571 /* Don't care what port we get */
572 ret = sendto(so->s, m->m_data, m->m_len, 0,
573 (struct sockaddr *)&addr, sizeof (struct sockaddr));
578 * Kill the socket if there's no reply in 4 minutes,
579 * but only if it's an expirable socket
582 so->so_expire = curtime + SO_EXPIRE;
583 so->so_state = SS_ISFCONNECTED; /* So that it gets select()ed */
588 * XXX This should really be tcp_listen
591 solisten(u_int port, u_int32_t laddr, u_int lport, int flags)
593 struct sockaddr_in addr;
596 socklen_t addrlen = sizeof(addr);
598 DEBUG_CALL("solisten");
599 DEBUG_ARG("port = %d", port);
600 DEBUG_ARG("laddr = %x", laddr);
601 DEBUG_ARG("lport = %d", lport);
602 DEBUG_ARG("flags = %x", flags);
604 if ((so = socreate()) == NULL) {
605 /* free(so); Not sofree() ??? free(NULL) == NOP */
609 /* Don't tcp_attach... we don't need so_snd nor so_rcv */
610 if ((so->so_tcpcb = tcp_newtcpcb(so)) == NULL) {
617 * SS_FACCEPTONCE sockets must time out.
619 if (flags & SS_FACCEPTONCE)
620 so->so_tcpcb->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT*2;
622 so->so_state = (SS_FACCEPTCONN|flags);
623 so->so_lport = lport; /* Kept in network format */
624 so->so_laddr.s_addr = laddr; /* Ditto */
626 addr.sin_family = AF_INET;
627 addr.sin_addr.s_addr = INADDR_ANY;
628 addr.sin_port = port;
630 if (((s = socket(AF_INET,SOCK_STREAM,0)) < 0) ||
631 (setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int)) < 0) ||
632 (bind(s,(struct sockaddr *)&addr, sizeof(addr)) < 0) ||
634 int tmperrno = errno; /* Don't clobber the real reason we failed */
638 /* Restore the real errno */
640 WSASetLastError(tmperrno);
646 setsockopt(s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int));
648 getsockname(s,(struct sockaddr *)&addr,&addrlen);
649 so->so_fport = addr.sin_port;
650 if (addr.sin_addr.s_addr == 0 || addr.sin_addr.s_addr == loopback_addr.s_addr)
651 so->so_faddr = alias_addr;
653 so->so_faddr = addr.sin_addr;
661 * Data is available in so_rcv
662 * Just write() the data to the socket
670 /* FD_CLR(so->s,&writefds); */
674 * Data has been freed in so_snd
675 * We have room for a read() if we want to
676 * For now, don't read, it'll be done in the main loop
687 * Various session state calls
688 * XXX Should be #define's
689 * The socket state stuff needs work, these often get call 2 or 3
690 * times each when only 1 was needed
693 soisfconnecting(struct socket *so)
695 so->so_state &= ~(SS_NOFDREF|SS_ISFCONNECTED|SS_FCANTRCVMORE|
696 SS_FCANTSENDMORE|SS_FWDRAIN);
697 so->so_state |= SS_ISFCONNECTING; /* Clobber other states */
701 soisfconnected(struct socket *so)
703 so->so_state &= ~(SS_ISFCONNECTING|SS_FWDRAIN|SS_NOFDREF);
704 so->so_state |= SS_ISFCONNECTED; /* Clobber other states */
708 sofcantrcvmore(struct socket *so)
710 if ((so->so_state & SS_NOFDREF) == 0) {
712 if(global_writefds) {
713 FD_CLR(so->s,global_writefds);
716 so->so_state &= ~(SS_ISFCONNECTING);
717 if (so->so_state & SS_FCANTSENDMORE)
718 so->so_state = SS_NOFDREF; /* Don't select it */ /* XXX close() here as well? */
720 so->so_state |= SS_FCANTRCVMORE;
724 sofcantsendmore(struct socket *so)
726 if ((so->so_state & SS_NOFDREF) == 0) {
727 shutdown(so->s,1); /* send FIN to fhost */
728 if (global_readfds) {
729 FD_CLR(so->s,global_readfds);
732 FD_CLR(so->s,global_xfds);
735 so->so_state &= ~(SS_ISFCONNECTING);
736 if (so->so_state & SS_FCANTRCVMORE)
737 so->so_state = SS_NOFDREF; /* as above */
739 so->so_state |= SS_FCANTSENDMORE;
743 soisfdisconnected(struct socket *so)
745 /* so->so_state &= ~(SS_ISFCONNECTING|SS_ISFCONNECTED); */
747 /* so->so_state = SS_ISFDISCONNECTED; */
749 * XXX Do nothing ... ?
754 * Set write drain mode
755 * Set CANTSENDMORE once all data has been write()n
758 sofwdrain(struct socket *so)
760 if (so->so_rcv.sb_cc)
761 so->so_state |= SS_FWDRAIN;