When the host aborts (RST) its side of a TCP connection we need to propagate that RST to the guest. The current code can leave such guest connections dangling forever. Spotted by Jason Wessel. Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> [steven@steven676.net: coding style adjustments] Signed-off-by: Steven Luo <steven+qemu@steven676.net> Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
896 lines
22 KiB
C
896 lines
22 KiB
C
/*
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* Copyright (c) 1995 Danny Gasparovski.
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*
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* Please read the file COPYRIGHT for the
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* terms and conditions of the copyright.
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include <slirp.h>
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#include "ip_icmp.h"
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#ifdef __sun__
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#include <sys/filio.h>
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#endif
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static void sofcantrcvmore(struct socket *so);
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static void sofcantsendmore(struct socket *so);
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struct socket *solookup(struct socket **last, struct socket *head,
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struct sockaddr_storage *lhost, struct sockaddr_storage *fhost)
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{
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struct socket *so = *last;
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/* Optimisation */
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if (so != head && sockaddr_equal(&(so->lhost.ss), lhost)
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&& (!fhost || sockaddr_equal(&so->fhost.ss, fhost))) {
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return so;
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}
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for (so = head->so_next; so != head; so = so->so_next) {
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if (sockaddr_equal(&(so->lhost.ss), lhost)
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&& (!fhost || sockaddr_equal(&so->fhost.ss, fhost))) {
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*last = so;
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return so;
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}
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}
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return (struct socket *)NULL;
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}
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/*
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* Create a new socket, initialise the fields
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* It is the responsibility of the caller to
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* insque() it into the correct linked-list
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*/
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struct socket *
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socreate(Slirp *slirp)
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{
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struct socket *so;
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so = (struct socket *)malloc(sizeof(struct socket));
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if(so) {
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memset(so, 0, sizeof(struct socket));
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so->so_state = SS_NOFDREF;
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so->s = -1;
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so->slirp = slirp;
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so->pollfds_idx = -1;
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}
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return(so);
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}
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/*
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* remque and free a socket, clobber cache
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*/
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void
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sofree(struct socket *so)
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{
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Slirp *slirp = so->slirp;
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if (so->so_emu==EMU_RSH && so->extra) {
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sofree(so->extra);
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so->extra=NULL;
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}
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if (so == slirp->tcp_last_so) {
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slirp->tcp_last_so = &slirp->tcb;
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} else if (so == slirp->udp_last_so) {
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slirp->udp_last_so = &slirp->udb;
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} else if (so == slirp->icmp_last_so) {
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slirp->icmp_last_so = &slirp->icmp;
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}
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m_free(so->so_m);
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if(so->so_next && so->so_prev)
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remque(so); /* crashes if so is not in a queue */
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free(so);
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}
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size_t sopreprbuf(struct socket *so, struct iovec *iov, int *np)
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{
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int n, lss, total;
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struct sbuf *sb = &so->so_snd;
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int len = sb->sb_datalen - sb->sb_cc;
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int mss = so->so_tcpcb->t_maxseg;
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DEBUG_CALL("sopreprbuf");
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DEBUG_ARG("so = %p", so);
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if (len <= 0)
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return 0;
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iov[0].iov_base = sb->sb_wptr;
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iov[1].iov_base = NULL;
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iov[1].iov_len = 0;
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if (sb->sb_wptr < sb->sb_rptr) {
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iov[0].iov_len = sb->sb_rptr - sb->sb_wptr;
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/* Should never succeed, but... */
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if (iov[0].iov_len > len)
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iov[0].iov_len = len;
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if (iov[0].iov_len > mss)
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iov[0].iov_len -= iov[0].iov_len%mss;
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n = 1;
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} else {
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iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_wptr;
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/* Should never succeed, but... */
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if (iov[0].iov_len > len) iov[0].iov_len = len;
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len -= iov[0].iov_len;
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if (len) {
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iov[1].iov_base = sb->sb_data;
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iov[1].iov_len = sb->sb_rptr - sb->sb_data;
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if(iov[1].iov_len > len)
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iov[1].iov_len = len;
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total = iov[0].iov_len + iov[1].iov_len;
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if (total > mss) {
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lss = total%mss;
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if (iov[1].iov_len > lss) {
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iov[1].iov_len -= lss;
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n = 2;
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} else {
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lss -= iov[1].iov_len;
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iov[0].iov_len -= lss;
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n = 1;
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}
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} else
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n = 2;
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} else {
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if (iov[0].iov_len > mss)
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iov[0].iov_len -= iov[0].iov_len%mss;
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n = 1;
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}
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}
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if (np)
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*np = n;
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return iov[0].iov_len + (n - 1) * iov[1].iov_len;
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}
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/*
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* Read from so's socket into sb_snd, updating all relevant sbuf fields
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* NOTE: This will only be called if it is select()ed for reading, so
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* a read() of 0 (or less) means it's disconnected
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*/
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int
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soread(struct socket *so)
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{
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int n, nn;
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struct sbuf *sb = &so->so_snd;
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struct iovec iov[2];
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DEBUG_CALL("soread");
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DEBUG_ARG("so = %p", so);
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/*
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* No need to check if there's enough room to read.
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* soread wouldn't have been called if there weren't
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*/
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sopreprbuf(so, iov, &n);
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#ifdef HAVE_READV
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nn = readv(so->s, (struct iovec *)iov, n);
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DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn));
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#else
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nn = qemu_recv(so->s, iov[0].iov_base, iov[0].iov_len,0);
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#endif
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if (nn <= 0) {
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if (nn < 0 && (errno == EINTR || errno == EAGAIN))
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return 0;
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else {
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int err;
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socklen_t slen = sizeof err;
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err = errno;
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if (nn == 0) {
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getsockopt(so->s, SOL_SOCKET, SO_ERROR,
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&err, &slen);
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}
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DEBUG_MISC((dfd, " --- soread() disconnected, nn = %d, errno = %d-%s\n", nn, errno,strerror(errno)));
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sofcantrcvmore(so);
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if (err == ECONNRESET
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|| err == ENOTCONN || err == EPIPE) {
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tcp_drop(sototcpcb(so), err);
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} else {
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tcp_sockclosed(sototcpcb(so));
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}
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return -1;
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}
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}
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#ifndef HAVE_READV
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/*
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* If there was no error, try and read the second time round
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* We read again if n = 2 (ie, there's another part of the buffer)
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* and we read as much as we could in the first read
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* We don't test for <= 0 this time, because there legitimately
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* might not be any more data (since the socket is non-blocking),
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* a close will be detected on next iteration.
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* A return of -1 wont (shouldn't) happen, since it didn't happen above
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*/
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if (n == 2 && nn == iov[0].iov_len) {
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int ret;
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ret = qemu_recv(so->s, iov[1].iov_base, iov[1].iov_len,0);
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if (ret > 0)
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nn += ret;
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}
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DEBUG_MISC((dfd, " ... read nn = %d bytes\n", nn));
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#endif
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/* Update fields */
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sb->sb_cc += nn;
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sb->sb_wptr += nn;
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if (sb->sb_wptr >= (sb->sb_data + sb->sb_datalen))
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sb->sb_wptr -= sb->sb_datalen;
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return nn;
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}
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int soreadbuf(struct socket *so, const char *buf, int size)
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{
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int n, nn, copy = size;
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struct sbuf *sb = &so->so_snd;
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struct iovec iov[2];
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DEBUG_CALL("soreadbuf");
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DEBUG_ARG("so = %p", so);
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/*
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* No need to check if there's enough room to read.
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* soread wouldn't have been called if there weren't
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*/
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if (sopreprbuf(so, iov, &n) < size)
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goto err;
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nn = MIN(iov[0].iov_len, copy);
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memcpy(iov[0].iov_base, buf, nn);
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copy -= nn;
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buf += nn;
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if (copy == 0)
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goto done;
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memcpy(iov[1].iov_base, buf, copy);
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done:
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/* Update fields */
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sb->sb_cc += size;
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sb->sb_wptr += size;
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if (sb->sb_wptr >= (sb->sb_data + sb->sb_datalen))
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sb->sb_wptr -= sb->sb_datalen;
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return size;
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err:
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sofcantrcvmore(so);
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tcp_sockclosed(sototcpcb(so));
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fprintf(stderr, "soreadbuf buffer to small");
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return -1;
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}
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/*
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* Get urgent data
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*
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* When the socket is created, we set it SO_OOBINLINE,
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* so when OOB data arrives, we soread() it and everything
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* in the send buffer is sent as urgent data
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*/
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int
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sorecvoob(struct socket *so)
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{
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struct tcpcb *tp = sototcpcb(so);
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int ret;
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DEBUG_CALL("sorecvoob");
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DEBUG_ARG("so = %p", so);
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/*
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* We take a guess at how much urgent data has arrived.
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* In most situations, when urgent data arrives, the next
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* read() should get all the urgent data. This guess will
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* be wrong however if more data arrives just after the
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* urgent data, or the read() doesn't return all the
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* urgent data.
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*/
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ret = soread(so);
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if (ret > 0) {
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tp->snd_up = tp->snd_una + so->so_snd.sb_cc;
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tp->t_force = 1;
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tcp_output(tp);
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tp->t_force = 0;
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}
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return ret;
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}
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/*
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* Send urgent data
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* There's a lot duplicated code here, but...
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*/
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int
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sosendoob(struct socket *so)
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{
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struct sbuf *sb = &so->so_rcv;
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char buff[2048]; /* XXX Shouldn't be sending more oob data than this */
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int n, len;
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DEBUG_CALL("sosendoob");
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DEBUG_ARG("so = %p", so);
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DEBUG_ARG("sb->sb_cc = %d", sb->sb_cc);
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if (so->so_urgc > 2048)
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so->so_urgc = 2048; /* XXXX */
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if (sb->sb_rptr < sb->sb_wptr) {
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/* We can send it directly */
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n = slirp_send(so, sb->sb_rptr, so->so_urgc, (MSG_OOB)); /* |MSG_DONTWAIT)); */
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so->so_urgc -= n;
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DEBUG_MISC((dfd, " --- sent %d bytes urgent data, %d urgent bytes left\n", n, so->so_urgc));
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} else {
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/*
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* Since there's no sendv or sendtov like writev,
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* we must copy all data to a linear buffer then
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* send it all
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*/
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len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr;
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if (len > so->so_urgc) len = so->so_urgc;
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memcpy(buff, sb->sb_rptr, len);
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so->so_urgc -= len;
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if (so->so_urgc) {
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n = sb->sb_wptr - sb->sb_data;
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if (n > so->so_urgc) n = so->so_urgc;
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memcpy((buff + len), sb->sb_data, n);
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so->so_urgc -= n;
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len += n;
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}
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n = slirp_send(so, buff, len, (MSG_OOB)); /* |MSG_DONTWAIT)); */
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#ifdef DEBUG
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if (n != len)
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DEBUG_ERROR((dfd, "Didn't send all data urgently XXXXX\n"));
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#endif
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DEBUG_MISC((dfd, " ---2 sent %d bytes urgent data, %d urgent bytes left\n", n, so->so_urgc));
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}
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sb->sb_cc -= n;
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sb->sb_rptr += n;
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if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen))
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sb->sb_rptr -= sb->sb_datalen;
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return n;
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}
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/*
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* Write data from so_rcv to so's socket,
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* updating all sbuf field as necessary
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*/
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int
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sowrite(struct socket *so)
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{
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int n,nn;
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struct sbuf *sb = &so->so_rcv;
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int len = sb->sb_cc;
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struct iovec iov[2];
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DEBUG_CALL("sowrite");
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DEBUG_ARG("so = %p", so);
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if (so->so_urgc) {
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sosendoob(so);
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if (sb->sb_cc == 0)
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return 0;
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}
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/*
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* No need to check if there's something to write,
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* sowrite wouldn't have been called otherwise
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*/
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iov[0].iov_base = sb->sb_rptr;
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iov[1].iov_base = NULL;
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iov[1].iov_len = 0;
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if (sb->sb_rptr < sb->sb_wptr) {
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iov[0].iov_len = sb->sb_wptr - sb->sb_rptr;
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/* Should never succeed, but... */
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if (iov[0].iov_len > len) iov[0].iov_len = len;
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n = 1;
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} else {
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iov[0].iov_len = (sb->sb_data + sb->sb_datalen) - sb->sb_rptr;
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if (iov[0].iov_len > len) iov[0].iov_len = len;
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len -= iov[0].iov_len;
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if (len) {
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iov[1].iov_base = sb->sb_data;
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iov[1].iov_len = sb->sb_wptr - sb->sb_data;
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if (iov[1].iov_len > len) iov[1].iov_len = len;
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n = 2;
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} else
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n = 1;
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}
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/* Check if there's urgent data to send, and if so, send it */
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#ifdef HAVE_READV
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nn = writev(so->s, (const struct iovec *)iov, n);
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DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn));
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#else
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nn = slirp_send(so, iov[0].iov_base, iov[0].iov_len,0);
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#endif
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/* This should never happen, but people tell me it does *shrug* */
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if (nn < 0 && (errno == EAGAIN || errno == EINTR))
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return 0;
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if (nn <= 0) {
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DEBUG_MISC((dfd, " --- sowrite disconnected, so->so_state = %x, errno = %d\n",
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so->so_state, errno));
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sofcantsendmore(so);
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tcp_sockclosed(sototcpcb(so));
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return -1;
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}
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#ifndef HAVE_READV
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if (n == 2 && nn == iov[0].iov_len) {
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int ret;
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ret = slirp_send(so, iov[1].iov_base, iov[1].iov_len,0);
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if (ret > 0)
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nn += ret;
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}
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DEBUG_MISC((dfd, " ... wrote nn = %d bytes\n", nn));
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#endif
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/* Update sbuf */
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sb->sb_cc -= nn;
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sb->sb_rptr += nn;
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if (sb->sb_rptr >= (sb->sb_data + sb->sb_datalen))
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sb->sb_rptr -= sb->sb_datalen;
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/*
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* If in DRAIN mode, and there's no more data, set
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* it CANTSENDMORE
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*/
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if ((so->so_state & SS_FWDRAIN) && sb->sb_cc == 0)
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sofcantsendmore(so);
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return nn;
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}
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/*
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* recvfrom() a UDP socket
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*/
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void
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sorecvfrom(struct socket *so)
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{
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struct sockaddr_storage addr;
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struct sockaddr_storage saddr, daddr;
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socklen_t addrlen = sizeof(struct sockaddr_storage);
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DEBUG_CALL("sorecvfrom");
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DEBUG_ARG("so = %p", so);
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if (so->so_type == IPPROTO_ICMP) { /* This is a "ping" reply */
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char buff[256];
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int len;
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len = recvfrom(so->s, buff, 256, 0,
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(struct sockaddr *)&addr, &addrlen);
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/* XXX Check if reply is "correct"? */
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if(len == -1 || len == 0) {
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u_char code=ICMP_UNREACH_PORT;
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if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST;
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else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET;
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DEBUG_MISC((dfd," udp icmp rx errno = %d-%s\n",
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errno,strerror(errno)));
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icmp_send_error(so->so_m, ICMP_UNREACH, code, 0, strerror(errno));
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} else {
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icmp_reflect(so->so_m);
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so->so_m = NULL; /* Don't m_free() it again! */
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}
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/* No need for this socket anymore, udp_detach it */
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udp_detach(so);
|
|
} else { /* A "normal" UDP packet */
|
|
struct mbuf *m;
|
|
int len;
|
|
#ifdef _WIN32
|
|
unsigned long n;
|
|
#else
|
|
int n;
|
|
#endif
|
|
|
|
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)) { */
|
|
ioctlsocket(so->s, FIONREAD, &n);
|
|
|
|
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((dfd, " did recvfrom %d, errno = %d-%s\n",
|
|
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((dfd, " rx error, tx icmp ICMP_UNREACH:%i\n", 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((dfd, " rx error, tx icmp6 ICMP_UNREACH:%i\n", 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, sizeof(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, u_int hport, uint32_t laddr,
|
|
u_int lport, int flags)
|
|
{
|
|
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 = %x", haddr);
|
|
DEBUG_ARG("hport = %d", hport);
|
|
DEBUG_ARG("laddr = %x", laddr);
|
|
DEBUG_ARG("lport = %d", lport);
|
|
DEBUG_ARG("flags = %x", flags);
|
|
|
|
so = socreate(slirp);
|
|
if (!so) {
|
|
return NULL;
|
|
}
|
|
|
|
/* Don't tcp_attach... we don't need so_snd nor so_rcv */
|
|
if ((so->so_tcpcb = tcp_newtcpcb(so)) == NULL) {
|
|
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 = qemu_socket(AF_INET,SOCK_STREAM,0)) < 0) ||
|
|
(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 */
|
|
|
|
close(s);
|
|
sofree(so);
|
|
/* Restore the real errno */
|
|
#ifdef _WIN32
|
|
WSASetLastError(tmperrno);
|
|
#else
|
|
errno = tmperrno;
|
|
#endif
|
|
return NULL;
|
|
}
|
|
qemu_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, &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((dfd, " addr.sin_port=%d, "
|
|
"addr.sin_addr.s_addr=%.16s\n",
|
|
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)) {
|
|
/*if (get_dns_addr(&addr) < 0) {*/ /* TODO */
|
|
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;
|
|
}
|
|
}
|