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-rw-r--r--slirp/src/socket.c944
1 files changed, 944 insertions, 0 deletions
diff --git a/slirp/src/socket.c b/slirp/src/socket.c
new file mode 100644
index 0000000000..f2428a3ae8
--- /dev/null
+++ b/slirp/src/socket.c
@@ -0,0 +1,944 @@
+/*
+ * Copyright (c) 1995 Danny Gasparovski.
+ *
+ * Please read the file COPYRIGHT for the
+ * terms and conditions of the copyright.
+ */
+
+#include "slirp.h"
+#include "ip_icmp.h"
+#ifdef __sun__
+#include <sys/filio.h>
+#endif
+
+static void sofcantrcvmore(struct socket *so);
+static void sofcantsendmore(struct socket *so);
+
+struct socket *solookup(struct socket **last, struct socket *head,
+ struct sockaddr_storage *lhost, struct sockaddr_storage *fhost)
+{
+ struct socket *so = *last;
+
+ /* Optimisation */
+ if (so != head && sockaddr_equal(&(so->lhost.ss), lhost)
+ && (!fhost || sockaddr_equal(&so->fhost.ss, fhost))) {
+ return so;
+ }
+
+ for (so = head->so_next; so != head; so = so->so_next) {
+ if (sockaddr_equal(&(so->lhost.ss), lhost)
+ && (!fhost || sockaddr_equal(&so->fhost.ss, fhost))) {
+ *last = so;
+ return so;
+ }
+ }
+
+ return (struct socket *)NULL;
+}
+
+/*
+ * Create a new socket, initialise the fields
+ * It is the responsibility of the caller to
+ * insque() it into the correct linked-list
+ */
+struct socket *
+socreate(Slirp *slirp)
+{
+ struct socket *so = g_new(struct socket, 1);
+
+ memset(so, 0, sizeof(struct socket));
+ so->so_state = SS_NOFDREF;
+ so->s = -1;
+ so->slirp = slirp;
+ so->pollfds_idx = -1;
+
+ return so;
+}
+
+/*
+ * Remove references to so from the given message queue.
+ */
+static void
+soqfree(struct socket *so, struct quehead *qh)
+{
+ struct mbuf *ifq;
+
+ for (ifq = (struct mbuf *) qh->qh_link;
+ (struct quehead *) ifq != qh;
+ ifq = ifq->ifq_next) {
+ if (ifq->ifq_so == so) {
+ struct mbuf *ifm;
+ ifq->ifq_so = NULL;
+ for (ifm = ifq->ifs_next; ifm != ifq; ifm = ifm->ifs_next) {
+ ifm->ifq_so = NULL;
+ }
+ }
+ }
+}
+
+/*
+ * remque and free a socket, clobber cache
+ */
+void
+sofree(struct socket *so)
+{
+ Slirp *slirp = so->slirp;
+
+ soqfree(so, &slirp->if_fastq);
+ soqfree(so, &slirp->if_batchq);
+
+ if (so == slirp->tcp_last_so) {
+ slirp->tcp_last_so = &slirp->tcb;
+ } else if (so == slirp->udp_last_so) {
+ slirp->udp_last_so = &slirp->udb;
+ } else if (so == slirp->icmp_last_so) {
+ slirp->icmp_last_so = &slirp->icmp;
+ }
+ m_free(so->so_m);
+
+ if(so->so_next && so->so_prev)
+ remque(so); /* crashes if so is not in a queue */
+
+ if (so->so_tcpcb) {
+ free(so->so_tcpcb);
+ }
+ g_free(so);
+}
+
+size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np)
+{
+ int n, lss, total;
+ struct sbuf *sb = &so->so_snd;
+ int len = sb->sb_datalen - sb->sb_cc;
+ int mss = so->so_tcpcb->t_maxseg;
+
+ DEBUG_CALL("sopreprbuf");
+ DEBUG_ARG("so = %p", so);
+
+ if (len <= 0)
+ return 0;
+
+ iov[0].iov_base = sb->sb_wptr;
+ iov[1].iov_base = NULL;
+ iov[1].iov_len = 0;
+ if (sb->sb_wptr < sb->sb_rptr) {
+ iov[0].iov_len = sb->sb_rptr - sb->sb_wptr;
+ /* Should never succeed, but... */
+ if (iov[0].iov_len > len)
+ iov[0].iov_len = len;
+ if (iov[0].iov_len > mss)
+ iov[0].iov_len -= iov[0].iov_len%mss;
+ n = 1;
+ } else {
+ iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_wptr;
+ /* Should never succeed, but... */
+ if (iov[0].iov_len > len) iov[0].iov_len = len;
+ len -= iov[0].iov_len;
+ if (len) {
+ iov[1].iov_base = sb->sb_data;
+ iov[1].iov_len = sb->sb_rptr - sb->sb_data;
+ if(iov[1].iov_len > len)
+ iov[1].iov_len = len;
+ total = iov[0].iov_len + iov[1].iov_len;
+ if (total > mss) {
+ lss = total%mss;
+ if (iov[1].iov_len > lss) {
+ iov[1].iov_len -= lss;
+ n = 2;
+ } else {
+ lss -= iov[1].iov_len;
+ iov[0].iov_len -= lss;
+ n = 1;
+ }
+ } else
+ n = 2;
+ } else {
+ if (iov[0].iov_len > mss)
+ iov[0].iov_len -= iov[0].iov_len%mss;
+ n = 1;
+ }
+ }
+ if (np)
+ *np = n;
+
+ return iov[0].iov_len + (n - 1) * iov[1].iov_len;
+}
+
+/*
+ * Read from so's socket into sb_snd, updating all relevant sbuf fields
+ * NOTE: This will only be called if it is select()ed for reading, so
+ * a read() of 0 (or less) means it's disconnected
+ */
+int
+soread(struct socket *so)
+{
+ int n, nn;
+ struct sbuf *sb = &so->so_snd;
+ struct iovec iov[2];
+
+ DEBUG_CALL("soread");
+ DEBUG_ARG("so = %p", so);
+
+ /*
+ * No need to check if there's enough room to read.
+ * soread wouldn't have been called if there weren't
+ */
+ sopreprbuf(so, iov, &n);
+
+ nn = recv(so->s, iov[0].iov_base, iov[0].iov_len,0);
+ if (nn <= 0) {
+ if (nn < 0 && (errno == EINTR || errno == EAGAIN))
+ return 0;
+ else {
+ int err;
+ socklen_t elen = sizeof err;
+ struct sockaddr_storage addr;
+ struct sockaddr *paddr = (struct sockaddr *) &addr;
+ socklen_t alen = sizeof addr;
+
+ err = errno;
+ if (nn == 0) {
+ if (getpeername(so->s, paddr, &alen) < 0) {
+ err = errno;
+ } else {
+ getsockopt(so->s, SOL_SOCKET, SO_ERROR,
+ &err, &elen);
+ }
+ }
+
+ DEBUG_MISC(" --- soread() disconnected, nn = %d, errno = %d-%s",
+ nn, errno,strerror(errno));
+ sofcantrcvmore(so);
+
+ if (err == ECONNRESET || err == ECONNREFUSED
+ || err == ENOTCONN || err == EPIPE) {
+ tcp_drop(sototcpcb(so), err);
+ } else {
+ tcp_sockclosed(sototcpcb(so));
+ }
+ return -1;
+ }
+ }
+
+ /*
+ * If there was no error, try and read the second time round
+ * We read again if n = 2 (ie, there's another part of the buffer)
+ * and we read as much as we could in the first read
+ * We don't test for <= 0 this time, because there legitimately
+ * might not be any more data (since the socket is non-blocking),
+ * a close will be detected on next iteration.
+ * A return of -1 won't (shouldn't) happen, since it didn't happen above
+ */
+ if (n == 2 && nn == iov[0].iov_len) {
+ int ret;
+ ret = recv(so->s, iov[1].iov_base, iov[1].iov_len,0);
+ if (ret > 0)
+ nn += ret;
+ }
+
+ DEBUG_MISC(" ... read nn = %d bytes", nn);
+
+ /* Update fields */
+ sb->sb_cc += nn;
+ sb->sb_wptr += nn;
+ if (sb->sb_wptr >= (sb->sb_data + sb->sb_datalen))
+ sb->sb_wptr -= sb->sb_datalen;
+ return nn;
+}
+
+int soreadbuf(struct socket *so, const char *buf, int size)
+{
+ int n, nn, copy = size;
+ struct sbuf *sb = &so->so_snd;
+ struct iovec iov[2];
+
+ DEBUG_CALL("soreadbuf");
+ DEBUG_ARG("so = %p", so);
+
+ /*
+ * No need to check if there's enough room to read.
+ * soread wouldn't have been called if there weren't
+ */
+ if (sopreprbuf(so, iov, &n) < size)
+ goto err;
+
+ nn = MIN(iov[0].iov_len, copy);
+ memcpy(iov[0].iov_base, buf, nn);
+
+ copy -= nn;
+ buf += nn;
+
+ if (copy == 0)
+ goto done;
+
+ memcpy(iov[1].iov_base, buf, copy);
+
+done:
+ /* Update fields */
+ sb->sb_cc += size;
+ sb->sb_wptr += size;
+ if (sb->sb_wptr >= (sb->sb_data + sb->sb_datalen))
+ sb->sb_wptr -= sb->sb_datalen;
+ return size;
+err:
+
+ sofcantrcvmore(so);
+ tcp_sockclosed(sototcpcb(so));
+ g_critical("soreadbuf buffer too small");
+ return -1;
+}
+
+/*
+ * Get urgent data
+ *
+ * When the socket is created, we set it SO_OOBINLINE,
+ * so when OOB data arrives, we soread() it and everything
+ * in the send buffer is sent as urgent data
+ */
+int
+sorecvoob(struct socket *so)
+{
+ struct tcpcb *tp = sototcpcb(so);
+ int ret;
+
+ DEBUG_CALL("sorecvoob");
+ DEBUG_ARG("so = %p", so);
+
+ /*
+ * We take a guess at how much urgent data has arrived.
+ * In most situations, when urgent data arrives, the next
+ * read() should get all the urgent data. This guess will
+ * be wrong however if more data arrives just after the
+ * urgent data, or the read() doesn't return all the
+ * urgent data.
+ */
+ ret = soread(so);
+ if (ret > 0) {
+ tp->snd_up = tp->snd_una + so->so_snd.sb_cc;
+ tp->t_force = 1;
+ tcp_output(tp);
+ tp->t_force = 0;
+ }
+
+ return ret;
+}
+
+/*
+ * Send urgent data
+ * There's a lot duplicated code here, but...
+ */
+int
+sosendoob(struct socket *so)
+{
+ struct sbuf *sb = &so->so_rcv;
+ char buff[2048]; /* XXX Shouldn't be sending more oob data than this */
+
+ int n;
+
+ DEBUG_CALL("sosendoob");
+ DEBUG_ARG("so = %p", so);
+ DEBUG_ARG("sb->sb_cc = %d", sb->sb_cc);
+
+ if (so->so_urgc > 2048)
+ so->so_urgc = 2048; /* XXXX */
+
+ if (sb->sb_rptr < sb->sb_wptr) {
+ /* We can send it directly */
+ n = slirp_send(so, sb->sb_rptr, so->so_urgc, (MSG_OOB)); /* |MSG_DONTWAIT)); */
+ } else {
+ /*
+ * Since there's no sendv or sendtov like writev,
+ * we must copy all data to a linear buffer then
+ * send it all
+ */
+ uint32_t urgc = so->so_urgc;
+ int len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr;
+ if (len > urgc) {
+ len = urgc;
+ }
+ memcpy(buff, sb->sb_rptr, len);
+ urgc -= len;
+ if (urgc) {
+ n = sb->sb_wptr - sb->sb_data;
+ if (n > urgc) {
+ n = urgc;
+ }
+ memcpy((buff + len), sb->sb_data, n);
+ len += n;
+ }
+ n = slirp_send(so, buff, len, (MSG_OOB)); /* |MSG_DONTWAIT)); */
+#ifdef DEBUG
+ if (n != len) {
+ DEBUG_ERROR("Didn't send all data urgently XXXXX");
+ }
+#endif
+ }
+
+ if (n < 0) {
+ return n;
+ }
+ so->so_urgc -= n;
+ DEBUG_MISC(" ---2 sent %d bytes urgent data, %d urgent bytes left", n, so->so_urgc);
+
+ sb->sb_cc -= n;
+ sb->sb_rptr += n;
+ if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen))
+ sb->sb_rptr -= sb->sb_datalen;
+
+ return n;
+}
+
+/*
+ * Write data from so_rcv to so's socket,
+ * updating all sbuf field as necessary
+ */
+int
+sowrite(struct socket *so)
+{
+ int n,nn;
+ struct sbuf *sb = &so->so_rcv;
+ int len = sb->sb_cc;
+ struct iovec iov[2];
+
+ DEBUG_CALL("sowrite");
+ DEBUG_ARG("so = %p", so);
+
+ if (so->so_urgc) {
+ uint32_t expected = so->so_urgc;
+ if (sosendoob(so) < expected) {
+ /* Treat a short write as a fatal error too,
+ * rather than continuing on and sending the urgent
+ * data as if it were non-urgent and leaving the
+ * so_urgc count wrong.
+ */
+ goto err_disconnected;
+ }
+ if (sb->sb_cc == 0)
+ return 0;
+ }
+
+ /*
+ * No need to check if there's something to write,
+ * sowrite wouldn't have been called otherwise
+ */
+
+ iov[0].iov_base = sb->sb_rptr;
+ iov[1].iov_base = NULL;
+ iov[1].iov_len = 0;
+ if (sb->sb_rptr < sb->sb_wptr) {
+ iov[0].iov_len = sb->sb_wptr - sb->sb_rptr;
+ /* Should never succeed, but... */
+ if (iov[0].iov_len > len) iov[0].iov_len = len;
+ n = 1;
+ } else {
+ iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr;
+ if (iov[0].iov_len > len) iov[0].iov_len = len;
+ len -= iov[0].iov_len;
+ if (len) {
+ iov[1].iov_base = sb->sb_data;
+ iov[1].iov_len = sb->sb_wptr - sb->sb_data;
+ if (iov[1].iov_len > len) iov[1].iov_len = len;
+ n = 2;
+ } else
+ n = 1;
+ }
+ /* Check if there's urgent data to send, and if so, send it */
+
+ nn = slirp_send(so, iov[0].iov_base, iov[0].iov_len,0);
+ /* This should never happen, but people tell me it does *shrug* */
+ if (nn < 0 && (errno == EAGAIN || errno == EINTR))
+ return 0;
+
+ if (nn <= 0) {
+ goto err_disconnected;
+ }
+
+ if (n == 2 && nn == iov[0].iov_len) {
+ int ret;
+ ret = slirp_send(so, iov[1].iov_base, iov[1].iov_len,0);
+ if (ret > 0)
+ nn += ret;
+ }
+ DEBUG_MISC(" ... wrote nn = %d bytes", nn);
+
+ /* Update sbuf */
+ sb->sb_cc -= nn;
+ sb->sb_rptr += nn;
+ if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen))
+ sb->sb_rptr -= sb->sb_datalen;
+
+ /*
+ * If in DRAIN mode, and there's no more data, set
+ * it CANTSENDMORE
+ */
+ if ((so->so_state & SS_FWDRAIN) && sb->sb_cc == 0)
+ sofcantsendmore(so);
+
+ return nn;
+
+err_disconnected:
+ DEBUG_MISC(" --- sowrite disconnected, so->so_state = %x, errno = %d",
+ so->so_state, errno);
+ sofcantsendmore(so);
+ tcp_sockclosed(sototcpcb(so));
+ return -1;
+}
+
+/*
+ * recvfrom() a UDP socket
+ */
+void
+sorecvfrom(struct socket *so)
+{
+ struct sockaddr_storage addr;
+ struct sockaddr_storage saddr, daddr;
+ socklen_t addrlen = sizeof(struct sockaddr_storage);
+
+ DEBUG_CALL("sorecvfrom");
+ DEBUG_ARG("so = %p", so);
+
+ if (so->so_type == IPPROTO_ICMP) { /* This is a "ping" reply */
+ char buff[256];
+ int len;
+
+ len = recvfrom(so->s, buff, 256, 0,
+ (struct sockaddr *)&addr, &addrlen);
+ /* XXX Check if reply is "correct"? */
+
+ if(len == -1 || len == 0) {
+ uint8_t code=ICMP_UNREACH_PORT;
+
+ if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST;
+ else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET;
+
+ DEBUG_MISC(" udp icmp rx errno = %d-%s",
+ errno,strerror(errno));
+ icmp_send_error(so->so_m, ICMP_UNREACH, code, 0, strerror(errno));
+ } else {
+ icmp_reflect(so->so_m);
+ so->so_m = NULL; /* Don't m_free() it again! */
+ }
+ /* No need for this socket anymore, udp_detach it */
+ udp_detach(so);
+ } else { /* A "normal" UDP packet */
+ struct mbuf *m;
+ int len;
+#ifdef _WIN32
+ unsigned long n;
+#else
+ int n;
+#endif
+
+ if (ioctlsocket(so->s, FIONREAD, &n) != 0) {
+ DEBUG_MISC(" ioctlsocket errno = %d-%s\n",
+ errno,strerror(errno));
+ return;
+ }
+ if (n == 0) {
+ return;
+ }
+
+ m = m_get(so->slirp);
+ if (!m) {
+ return;
+ }
+ switch (so->so_ffamily) {
+ case AF_INET:
+ m->m_data += IF_MAXLINKHDR + sizeof(struct udpiphdr);
+ break;
+ case AF_INET6:
+ m->m_data += IF_MAXLINKHDR + sizeof(struct ip6)
+ + sizeof(struct udphdr);
+ break;
+ default:
+ g_assert_not_reached();
+ break;
+ }
+
+ /*
+ * XXX Shouldn't FIONREAD packets destined for port 53,
+ * but I don't know the max packet size for DNS lookups
+ */
+ len = M_FREEROOM(m);
+ /* if (so->so_fport != htons(53)) { */
+
+ if (n > len) {
+ n = (m->m_data - m->m_dat) + m->m_len + n + 1;
+ m_inc(m, n);
+ len = M_FREEROOM(m);
+ }
+ /* } */
+
+ m->m_len = recvfrom(so->s, m->m_data, len, 0,
+ (struct sockaddr *)&addr, &addrlen);
+ DEBUG_MISC(" did recvfrom %d, errno = %d-%s",
+ m->m_len, errno,strerror(errno));
+ if(m->m_len<0) {
+ /* Report error as ICMP */
+ switch (so->so_lfamily) {
+ uint8_t code;
+ case AF_INET:
+ code = ICMP_UNREACH_PORT;
+
+ if (errno == EHOSTUNREACH) {
+ code = ICMP_UNREACH_HOST;
+ } else if (errno == ENETUNREACH) {
+ code = ICMP_UNREACH_NET;
+ }
+
+ DEBUG_MISC(" rx error, tx icmp ICMP_UNREACH:%i", code);
+ icmp_send_error(so->so_m, ICMP_UNREACH, code, 0, strerror(errno));
+ break;
+ case AF_INET6:
+ code = ICMP6_UNREACH_PORT;
+
+ if (errno == EHOSTUNREACH) {
+ code = ICMP6_UNREACH_ADDRESS;
+ } else if (errno == ENETUNREACH) {
+ code = ICMP6_UNREACH_NO_ROUTE;
+ }
+
+ DEBUG_MISC(" rx error, tx icmp6 ICMP_UNREACH:%i", code);
+ icmp6_send_error(so->so_m, ICMP6_UNREACH, code);
+ break;
+ default:
+ g_assert_not_reached();
+ break;
+ }
+ m_free(m);
+ } else {
+ /*
+ * Hack: domain name lookup will be used the most for UDP,
+ * and since they'll only be used once there's no need
+ * for the 4 minute (or whatever) timeout... So we time them
+ * out much quicker (10 seconds for now...)
+ */
+ if (so->so_expire) {
+ if (so->so_fport == htons(53))
+ so->so_expire = curtime + SO_EXPIREFAST;
+ else
+ so->so_expire = curtime + SO_EXPIRE;
+ }
+
+ /*
+ * If this packet was destined for CTL_ADDR,
+ * make it look like that's where it came from
+ */
+ saddr = addr;
+ sotranslate_in(so, &saddr);
+ daddr = so->lhost.ss;
+
+ switch (so->so_ffamily) {
+ case AF_INET:
+ udp_output(so, m, (struct sockaddr_in *) &saddr,
+ (struct sockaddr_in *) &daddr,
+ so->so_iptos);
+ break;
+ case AF_INET6:
+ udp6_output(so, m, (struct sockaddr_in6 *) &saddr,
+ (struct sockaddr_in6 *) &daddr);
+ break;
+ default:
+ g_assert_not_reached();
+ break;
+ }
+ } /* rx error */
+ } /* if ping packet */
+}
+
+/*
+ * sendto() a socket
+ */
+int
+sosendto(struct socket *so, struct mbuf *m)
+{
+ int ret;
+ struct sockaddr_storage addr;
+
+ DEBUG_CALL("sosendto");
+ DEBUG_ARG("so = %p", so);
+ DEBUG_ARG("m = %p", m);
+
+ addr = so->fhost.ss;
+ DEBUG_CALL(" sendto()ing)");
+ sotranslate_out(so, &addr);
+
+ /* Don't care what port we get */
+ ret = sendto(so->s, m->m_data, m->m_len, 0,
+ (struct sockaddr *)&addr, sockaddr_size(&addr));
+ if (ret < 0)
+ return -1;
+
+ /*
+ * Kill the socket if there's no reply in 4 minutes,
+ * but only if it's an expirable socket
+ */
+ if (so->so_expire)
+ so->so_expire = curtime + SO_EXPIRE;
+ so->so_state &= SS_PERSISTENT_MASK;
+ so->so_state |= SS_ISFCONNECTED; /* So that it gets select()ed */
+ return 0;
+}
+
+/*
+ * Listen for incoming TCP connections
+ */
+struct socket *
+tcp_listen(Slirp *slirp, uint32_t haddr, unsigned hport, uint32_t laddr,
+ unsigned lport, int flags)
+{
+ /* TODO: IPv6 */
+ struct sockaddr_in addr;
+ struct socket *so;
+ int s, opt = 1;
+ socklen_t addrlen = sizeof(addr);
+ memset(&addr, 0, addrlen);
+
+ DEBUG_CALL("tcp_listen");
+ DEBUG_ARG("haddr = %s", inet_ntoa((struct in_addr){.s_addr = haddr}));
+ DEBUG_ARG("hport = %d", ntohs(hport));
+ DEBUG_ARG("laddr = %s", inet_ntoa((struct in_addr){.s_addr = laddr}));
+ DEBUG_ARG("lport = %d", ntohs(lport));
+ DEBUG_ARG("flags = %x", flags);
+
+ so = socreate(slirp);
+
+ /* Don't tcp_attach... we don't need so_snd nor so_rcv */
+ if ((so->so_tcpcb = tcp_newtcpcb(so)) == NULL) {
+ g_free(so);
+ return NULL;
+ }
+ insque(so, &slirp->tcb);
+
+ /*
+ * SS_FACCEPTONCE sockets must time out.
+ */
+ if (flags & SS_FACCEPTONCE)
+ so->so_tcpcb->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT*2;
+
+ so->so_state &= SS_PERSISTENT_MASK;
+ so->so_state |= (SS_FACCEPTCONN | flags);
+ so->so_lfamily = AF_INET;
+ so->so_lport = lport; /* Kept in network format */
+ so->so_laddr.s_addr = laddr; /* Ditto */
+
+ addr.sin_family = AF_INET;
+ addr.sin_addr.s_addr = haddr;
+ addr.sin_port = hport;
+
+ if (((s = slirp_socket(AF_INET,SOCK_STREAM,0)) < 0) ||
+ (slirp_socket_set_fast_reuse(s) < 0) ||
+ (bind(s,(struct sockaddr *)&addr, sizeof(addr)) < 0) ||
+ (listen(s,1) < 0)) {
+ int tmperrno = errno; /* Don't clobber the real reason we failed */
+
+ if (s >= 0) {
+ closesocket(s);
+ }
+ sofree(so);
+ /* Restore the real errno */
+#ifdef _WIN32
+ WSASetLastError(tmperrno);
+#else
+ errno = tmperrno;
+#endif
+ return NULL;
+ }
+ setsockopt(s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(int));
+ opt = 1;
+ setsockopt(s, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(int));
+
+ getsockname(s,(struct sockaddr *)&addr,&addrlen);
+ so->so_ffamily = AF_INET;
+ so->so_fport = addr.sin_port;
+ if (addr.sin_addr.s_addr == 0 || addr.sin_addr.s_addr == loopback_addr.s_addr)
+ so->so_faddr = slirp->vhost_addr;
+ else
+ so->so_faddr = addr.sin_addr;
+
+ so->s = s;
+ return so;
+}
+
+/*
+ * Various session state calls
+ * XXX Should be #define's
+ * The socket state stuff needs work, these often get call 2 or 3
+ * times each when only 1 was needed
+ */
+void
+soisfconnecting(struct socket *so)
+{
+ so->so_state &= ~(SS_NOFDREF|SS_ISFCONNECTED|SS_FCANTRCVMORE|
+ SS_FCANTSENDMORE|SS_FWDRAIN);
+ so->so_state |= SS_ISFCONNECTING; /* Clobber other states */
+}
+
+void
+soisfconnected(struct socket *so)
+{
+ so->so_state &= ~(SS_ISFCONNECTING|SS_FWDRAIN|SS_NOFDREF);
+ so->so_state |= SS_ISFCONNECTED; /* Clobber other states */
+}
+
+static void
+sofcantrcvmore(struct socket *so)
+{
+ if ((so->so_state & SS_NOFDREF) == 0) {
+ shutdown(so->s,0);
+ }
+ so->so_state &= ~(SS_ISFCONNECTING);
+ if (so->so_state & SS_FCANTSENDMORE) {
+ so->so_state &= SS_PERSISTENT_MASK;
+ so->so_state |= SS_NOFDREF; /* Don't select it */
+ } else {
+ so->so_state |= SS_FCANTRCVMORE;
+ }
+}
+
+static void
+sofcantsendmore(struct socket *so)
+{
+ if ((so->so_state & SS_NOFDREF) == 0) {
+ shutdown(so->s,1); /* send FIN to fhost */
+ }
+ so->so_state &= ~(SS_ISFCONNECTING);
+ if (so->so_state & SS_FCANTRCVMORE) {
+ so->so_state &= SS_PERSISTENT_MASK;
+ so->so_state |= SS_NOFDREF; /* as above */
+ } else {
+ so->so_state |= SS_FCANTSENDMORE;
+ }
+}
+
+/*
+ * Set write drain mode
+ * Set CANTSENDMORE once all data has been write()n
+ */
+void
+sofwdrain(struct socket *so)
+{
+ if (so->so_rcv.sb_cc)
+ so->so_state |= SS_FWDRAIN;
+ else
+ sofcantsendmore(so);
+}
+
+/*
+ * Translate addr in host addr when it is a virtual address
+ */
+void sotranslate_out(struct socket *so, struct sockaddr_storage *addr)
+{
+ Slirp *slirp = so->slirp;
+ struct sockaddr_in *sin = (struct sockaddr_in *)addr;
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
+
+ switch (addr->ss_family) {
+ case AF_INET:
+ if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) ==
+ slirp->vnetwork_addr.s_addr) {
+ /* It's an alias */
+ if (so->so_faddr.s_addr == slirp->vnameserver_addr.s_addr) {
+ if (get_dns_addr(&sin->sin_addr) < 0) {
+ sin->sin_addr = loopback_addr;
+ }
+ } else {
+ sin->sin_addr = loopback_addr;
+ }
+ }
+
+ DEBUG_MISC(" addr.sin_port=%d, addr.sin_addr.s_addr=%.16s",
+ ntohs(sin->sin_port), inet_ntoa(sin->sin_addr));
+ break;
+
+ case AF_INET6:
+ if (in6_equal_net(&so->so_faddr6, &slirp->vprefix_addr6,
+ slirp->vprefix_len)) {
+ if (in6_equal(&so->so_faddr6, &slirp->vnameserver_addr6)) {
+ uint32_t scope_id;
+ if (get_dns6_addr(&sin6->sin6_addr, &scope_id) >= 0) {
+ sin6->sin6_scope_id = scope_id;
+ } else {
+ sin6->sin6_addr = in6addr_loopback;
+ }
+ } else {
+ sin6->sin6_addr = in6addr_loopback;
+ }
+ }
+ break;
+
+ default:
+ break;
+ }
+}
+
+void sotranslate_in(struct socket *so, struct sockaddr_storage *addr)
+{
+ Slirp *slirp = so->slirp;
+ struct sockaddr_in *sin = (struct sockaddr_in *)addr;
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
+
+ switch (addr->ss_family) {
+ case AF_INET:
+ if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) ==
+ slirp->vnetwork_addr.s_addr) {
+ uint32_t inv_mask = ~slirp->vnetwork_mask.s_addr;
+
+ if ((so->so_faddr.s_addr & inv_mask) == inv_mask) {
+ sin->sin_addr = slirp->vhost_addr;
+ } else if (sin->sin_addr.s_addr == loopback_addr.s_addr ||
+ so->so_faddr.s_addr != slirp->vhost_addr.s_addr) {
+ sin->sin_addr = so->so_faddr;
+ }
+ }
+ break;
+
+ case AF_INET6:
+ if (in6_equal_net(&so->so_faddr6, &slirp->vprefix_addr6,
+ slirp->vprefix_len)) {
+ if (in6_equal(&sin6->sin6_addr, &in6addr_loopback)
+ || !in6_equal(&so->so_faddr6, &slirp->vhost_addr6)) {
+ sin6->sin6_addr = so->so_faddr6;
+ }
+ }
+ break;
+
+ default:
+ break;
+ }
+}
+
+/*
+ * Translate connections from localhost to the real hostname
+ */
+void sotranslate_accept(struct socket *so)
+{
+ Slirp *slirp = so->slirp;
+
+ switch (so->so_ffamily) {
+ case AF_INET:
+ if (so->so_faddr.s_addr == INADDR_ANY ||
+ (so->so_faddr.s_addr & loopback_mask) ==
+ (loopback_addr.s_addr & loopback_mask)) {
+ so->so_faddr = slirp->vhost_addr;
+ }
+ break;
+
+ case AF_INET6:
+ if (in6_equal(&so->so_faddr6, &in6addr_any) ||
+ in6_equal(&so->so_faddr6, &in6addr_loopback)) {
+ so->so_faddr6 = slirp->vhost_addr6;
+ }
+ break;
+
+ default:
+ break;
+ }
+}
+
+void sodrop(struct socket *s, int num)
+{
+ if (sbdrop(&s->so_snd, num)) {
+ s->slirp->cb->notify(s->slirp->opaque);
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-06 04:21:58 +0000