mirror of
https://repo.or.cz/socat.git
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Combined Bind() calls in xiobind(); fixed UDP-SENDTO lowport bug
This commit is contained in:
Gerhard Rieger
parent
56a56e127c
commit
d8ee49007e
8 changed files with 194 additions and 180 deletions
4
CHANGES
4
CHANGES
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@ -27,6 +27,10 @@ Corrections:
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The rawer option failed because it tried to clear CREAD.
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Test: RAWER
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UDP-SEND and UPD-SENDTO with option lowport always bound to port 1
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instead of a free port in range 640..1023
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Test: UDP_LOWPORT
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Porting:
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OpenSSL, at least 1.1 on Ubuntu, crashed with SIGSEGV under certain
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conditions: client connection to server with certificate with empty
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41
test.sh
41
test.sh
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@ -15496,6 +15496,47 @@ esac
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PORT=$((PORT+1))
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N=$((N+1))
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# Up to 1.7.4.3 there was a bug with the lowport option:
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# Active addresses UDP-SEND, UDP-SENDTO always bound to port 1 instead of
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# 640..1023
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NAME=UDP_LOWPORT
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case "$TESTS" in
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*%$N%*|*%functions%*|*%bugs%*|*%socket%*|*%$NAME%*)
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TEST="$NAME: UDP4-SEND with lowport"
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# Run Socat with UDP4-SEND:...,lowport and full logging and check the
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# parameters of bind() call. It port is in the range 640..1023 the test
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# succeeded.
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if ! eval $NUMCOND; then :; else
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tf="$td/test$N.stdout"
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te="$td/test$N.stderr"
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tdiff="$td/test$N.diff"
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da="test$N $(date) $RANDOM"
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CMD="$TRACE $SOCAT $opts -d -d -d -d /dev/null UDP4-SENDTO:$LOCALHOST:$PORT,lowport"
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printf "test $F_n $TEST... " $N
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$CMD >/dev/null 2>"${te}"
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rc1=$?
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LOWPORT=$(grep 'D bind(.*:' $te |sed 's/.*:\([0-9][0-9]*\),.*/\1/')
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#echo "LOWPORT=\"$LOWPORT\"" >&2
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#type socat >&2
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if [[ $LOWPORT =~ [0-9][0-9]* ]] && [ "$LOWPORT" -ge 640 -a "$LOWPORT" -le 1023 ]; then
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$PRINTF "$OK\n"
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if [ "$VERBOSE" ]; then
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echo "$CMD" >&2
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fi
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numOK=$((numOK+1))
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else
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$PRINTF "$FAILED\n"
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echo "$CMD" >&2
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cat "${te}" >&2
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numFAIL=$((numFAIL+1))
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listFAIL="$listFAIL $N"
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fi
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fi # NUMCOND
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;;
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esac
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PORT=$((PORT+1))
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N=$((N+1))
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# end of common tests
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##################################################################################
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@ -69,7 +69,7 @@ int _xioopen_interface(const char *ifname,
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return
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_xioopen_dgram_sendto(needbind?&us:NULL, uslen,
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opts, xioflags, xfd, groups, pf, socktype, 0);
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opts, xioflags, xfd, groups, pf, socktype, 0, 0);
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}
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static
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@ -143,7 +143,7 @@ int _xioopen_rawip_sendto(const char *hostname, const char *protname,
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}
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return
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_xioopen_dgram_sendto(needbind?&us:NULL, uslen,
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opts, xioflags, xfd, groups, *pf, socktype, ipproto);
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opts, xioflags, xfd, groups, *pf, socktype, ipproto, 0);
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}
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301
xio-socket.c
301
xio-socket.c
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@ -63,6 +63,14 @@ xiolog_ancillary_socket(struct cmsghdr *cmsg, int *num,
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char *nambuff, int namlen,
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char *envbuff, int envlen,
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char *valbuff, int vallen);
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static int xiobind(
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struct single *xfd,
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union sockaddr_union *us,
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size_t uslen,
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struct opt *opts,
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int pf,
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bool alt,
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int level);
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#if WITH_GENERICSOCKET
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@ -457,7 +465,7 @@ int _xioopen_socket_sendto(const char *pfname, const char *type,
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return
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_xioopen_dgram_sendto(needbind?&us:NULL, uslen,
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opts, xioflags, xfd, groups, pf, socktype, proto);
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opts, xioflags, xfd, groups, pf, socktype, proto, 0);
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}
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@ -775,111 +783,9 @@ int _xioopen_connect(struct single *xfd, union sockaddr_union *us, size_t uslen,
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applyopts_cloexec(xfd->fd, opts);
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#if WITH_UNIX
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if (pf == PF_UNIX && us != NULL) {
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applyopts_named(us->un.sun_path, opts, PH_PREOPEN);
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if (xiobind(xfd, us, uslen, opts, pf, alt, level) < 0) {
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return -1;
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}
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#endif
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applyopts(xfd->fd, opts, PH_PREBIND);
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applyopts(xfd->fd, opts, PH_BIND);
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#if WITH_TCP || WITH_UDP
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if (alt) {
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union sockaddr_union sin, *sinp;
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unsigned short *port, i, N;
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div_t dv;
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/* prepare sockaddr for bind probing */
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if (us) {
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sinp = us;
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} else {
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if (them->sa_family == AF_INET) {
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socket_in_init(&sin.ip4);
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#if WITH_IP6
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} else {
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socket_in6_init(&sin.ip6);
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#endif
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}
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sinp = &sin;
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}
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if (them->sa_family == AF_INET) {
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port = &sin.ip4.sin_port;
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#if WITH_IP6
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} else if (them->sa_family == AF_INET6) {
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port = &sin.ip6.sin6_port;
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#endif
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} else {
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port = 0; /* just to make compiler happy */
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}
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/* combine random+step variant to quickly find a free port when only
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few are in use, and certainly find a free port in defined time even
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if there are almost all in use */
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/* dirt 1: having tcp/udp code in socket function */
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/* dirt 2: using a time related system call for init of random */
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{
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/* generate a random port, with millisecond random init */
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#if 0
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struct timeb tb;
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ftime(&tb);
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srandom(tb.time*1000+tb.millitm);
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#else
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struct timeval tv;
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struct timezone tz;
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tz.tz_minuteswest = 0;
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tz.tz_dsttime = 0;
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if ((result = Gettimeofday(&tv, &tz)) < 0) {
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Warn2("gettimeofday(%p, {0,0}): %s", &tv, strerror(errno));
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}
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srandom(tv.tv_sec*1000000+tv.tv_usec);
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#endif
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}
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dv = div(random(), IPPORT_RESERVED-XIO_IPPORT_LOWER);
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i = N = XIO_IPPORT_LOWER + dv.rem;
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do { /* loop over lowport bind() attempts */
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*port = htons(i);
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if (Bind(xfd->fd, &sinp->soa, sizeof(*sinp)) < 0) {
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Msg4(errno==EADDRINUSE?E_INFO:level,
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"bind(%d, {%s}, "F_Zd"): %s", xfd->fd,
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sockaddr_info(&sinp->soa, sizeof(*sinp), infobuff, sizeof(infobuff)),
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sizeof(*sinp), strerror(errno));
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if (errno != EADDRINUSE) {
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Close(xfd->fd);
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return STAT_RETRYLATER;
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}
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} else {
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break; /* could bind to port, good, continue past loop */
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}
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--i; if (i < XIO_IPPORT_LOWER) i = IPPORT_RESERVED-1;
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if (i == N) {
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Msg(level, "no low port available");
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/*errno = EADDRINUSE; still assigned */
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Close(xfd->fd);
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return STAT_RETRYLATER;
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}
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} while (i != N);
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} else
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#endif /* WITH_TCP || WITH_UDP */
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if (us) {
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#if WITH_UNIX
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if (pf == PF_UNIX && us != NULL) {
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applyopts_named(us->un.sun_path, opts, PH_PREOPEN);
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}
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#endif
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if (Bind(xfd->fd, &us->soa, uslen) < 0) {
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Msg4(level, "bind(%d, {%s}, "F_Zd"): %s",
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xfd->fd, sockaddr_info(&us->soa, uslen, infobuff, sizeof(infobuff)),
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uslen, strerror(errno));
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Close(xfd->fd);
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return STAT_RETRYLATER;
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}
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}
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#if WITH_UNIX
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if (pf == PF_UNIX && us != NULL) {
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applyopts_named(us->un.sun_path, opts, PH_PASTOPEN);
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}
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#endif
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applyopts(xfd->fd, opts, PH_PASTBIND);
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applyopts(xfd->fd, opts, PH_CONNECT);
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@ -1116,7 +1022,7 @@ int _xioopen_dgram_sendto(/* them is already in xfd->peersa */
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union sockaddr_union *us, socklen_t uslen,
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struct opt *opts,
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int xioflags, xiosingle_t *xfd, unsigned groups,
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int pf, int socktype, int ipproto) {
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int pf, int socktype, int ipproto, bool alt) {
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int level = E_ERROR;
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union sockaddr_union la; socklen_t lalen = sizeof(la);
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char infobuff[256];
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@ -1138,30 +1044,9 @@ int _xioopen_dgram_sendto(/* them is already in xfd->peersa */
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applyopts_cloexec(xfd->fd, opts);
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#if WITH_UNIX
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if (pf == PF_UNIX && us != NULL) {
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applyopts_named(us->un.sun_path, opts, PH_PREOPEN);
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if (xiobind(xfd, us, uslen, opts, pf, alt, level) < 0) {
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return -1;
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}
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#endif
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applyopts(xfd->fd, opts, PH_PREBIND);
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applyopts(xfd->fd, opts, PH_BIND);
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if (us) {
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if (Bind(xfd->fd, &us->soa, uslen) < 0) {
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Msg4(level, "bind(%d, {%s}, "F_socklen"): %s",
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xfd->fd, sockaddr_info(&us->soa, uslen, infobuff, sizeof(infobuff)),
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uslen, strerror(errno));
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Close(xfd->fd);
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return STAT_RETRYLATER;
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}
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}
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#if WITH_UNIX
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if (pf == PF_UNIX && us != NULL) {
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applyopts_named(us->un.sun_path, opts, PH_PASTOPEN);
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}
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#endif
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applyopts(xfd->fd, opts, PH_PASTBIND);
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/*applyopts(xfd->fd, opts, PH_CONNECT);*/
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@ -1333,25 +1218,16 @@ int _xioopen_dgram_recvfrom(struct single *xfd, int xioflags,
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applyopts_cloexec(xfd->fd, opts);
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applyopts(xfd->fd, opts, PH_PREBIND);
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applyopts(xfd->fd, opts, PH_BIND);
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if ((us != NULL) && Bind(xfd->fd, us, uslen) < 0) {
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Msg4(level, "bind(%d, {%s}, "F_socklen"): %s", xfd->fd,
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sockaddr_info(us, uslen, infobuff, sizeof(infobuff)), uslen,
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strerror(errno));
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Close(xfd->fd);
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return STAT_RETRYLATER;
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if (xiobind(xfd, (union sockaddr_union *)us, uslen,
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opts, pf, 0, level) < 0) {
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return -1;
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}
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applyopts(xfd->fd, opts, PH_PASTBIND);
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#if WITH_UNIX
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if (pf == AF_UNIX && us != NULL) {
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applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_FD);
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}
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#endif
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applyopts(xfd->fd, opts, PH_PASTBIND);
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#if WITH_UNIX
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if (pf == AF_UNIX && us != NULL) {
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/*applyopts_early(((struct sockaddr_un *)us)->sun_path, opts);*/
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applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_EARLY);
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applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_PREOPEN);
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@ -1592,7 +1468,6 @@ int _xioopen_dgram_recv(struct single *xfd, int xioflags,
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struct opt *opts, int pf, int socktype, int proto,
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int level) {
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char *rangename;
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char infobuff[256];
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if (applyopts_single(xfd, opts, PH_INIT) < 0) return STAT_NORETRY;
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@ -1605,26 +1480,13 @@ int _xioopen_dgram_recv(struct single *xfd, int xioflags,
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applyopts_cloexec(xfd->fd, opts);
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applyopts(xfd->fd, opts, PH_PREBIND);
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applyopts(xfd->fd, opts, PH_BIND);
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if ((us != NULL) && Bind(xfd->fd, us, uslen) < 0) {
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Msg4(level, "bind(%d, {%s}, "F_socklen"): %s", xfd->fd,
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sockaddr_info(us, uslen, infobuff, sizeof(infobuff)), uslen,
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strerror(errno));
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Close(xfd->fd);
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return STAT_RETRYLATER;
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if (xiobind(xfd, (union sockaddr_union *)us, uslen, opts, pf, 0, level) < 0) {
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return -1;
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}
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#if WITH_UNIX
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if (pf == AF_UNIX && us != NULL) {
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applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_FD);
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}
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#endif
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applyopts_single(xfd, opts, PH_PASTBIND);
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applyopts(xfd->fd, opts, PH_PASTBIND);
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#if WITH_UNIX
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if (pf == AF_UNIX && us != NULL) {
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/*applyopts_early(((struct sockaddr_un *)us)->sun_path, opts);*/
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applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_EARLY);
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applyopts_named(((struct sockaddr_un *)us)->sun_path, opts, PH_PREOPEN);
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@ -2262,3 +2124,124 @@ xiosocketpair(struct opt *opts, int pf, int socktype, int proto, int sv[2]) {
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}
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return result;
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}
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int xiobind(
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struct single *xfd,
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union sockaddr_union *us,
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size_t uslen,
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struct opt *opts,
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int pf,
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bool alt,
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int level)
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{
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char infobuff[256];
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int result;
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#if WITH_UNIX
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if (pf == PF_UNIX && us != NULL) {
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applyopts_named(us->un.sun_path, opts, PH_PREOPEN);
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}
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#endif
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applyopts(xfd->fd, opts, PH_PREBIND);
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applyopts(xfd->fd, opts, PH_BIND);
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#if WITH_TCP || WITH_UDP
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if (alt) {
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union sockaddr_union sin, *sinp;
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unsigned short *port, i, N;
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div_t dv;
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/* prepare sockaddr for bind probing */
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if (us) {
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sinp = us;
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} else {
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if (pf == AF_INET) {
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socket_in_init(&sin.ip4);
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#if WITH_IP6
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} else {
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socket_in6_init(&sin.ip6);
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#endif
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}
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sinp = &sin;
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}
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if (pf == AF_INET) {
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port = &sin.ip4.sin_port;
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#if WITH_IP6
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} else if (pf == AF_INET6) {
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port = &sin.ip6.sin6_port;
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#endif
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} else {
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port = 0; /* just to make compiler happy */
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}
|
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/* combine random+step variant to quickly find a free port when only
|
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few are in use, and certainly find a free port in defined time even
|
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if there are almost all in use */
|
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/* dirt 1: having tcp/udp code in socket function */
|
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/* dirt 2: using a time related system call for init of random */
|
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{
|
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/* generate a random port, with millisecond random init */
|
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#if 0
|
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struct timeb tb;
|
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ftime(&tb);
|
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srandom(tb.time*1000+tb.millitm);
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#else
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struct timeval tv;
|
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struct timezone tz;
|
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tz.tz_minuteswest = 0;
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tz.tz_dsttime = 0;
|
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if ((result = Gettimeofday(&tv, &tz)) < 0) {
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Warn2("gettimeofday(%p, {0,0}): %s", &tv, strerror(errno));
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}
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srandom(tv.tv_sec*1000000+tv.tv_usec);
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#endif
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}
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/* Note: IPPORT_RESERVED is from includes, 1024 */
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dv = div(random(), IPPORT_RESERVED-XIO_IPPORT_LOWER);
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i = N = XIO_IPPORT_LOWER + dv.rem;
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do { /* loop over lowport bind() attempts */
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*port = htons(i);
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if (Bind(xfd->fd, &sinp->soa, sizeof(*sinp)) < 0) {
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Msg4(errno==EADDRINUSE?E_INFO:level,
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"bind(%d, {%s}, "F_Zd"): %s", xfd->fd,
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sockaddr_info(&sinp->soa, sizeof(*sinp), infobuff, sizeof(infobuff)),
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sizeof(*sinp), strerror(errno));
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if (errno != EADDRINUSE) {
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Close(xfd->fd);
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return STAT_RETRYLATER;
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}
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} else {
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break; /* could bind to port, good, continue past loop */
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}
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--i; if (i < XIO_IPPORT_LOWER) i = IPPORT_RESERVED-1;
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if (i == N) {
|
||||
Msg(level, "no low port available");
|
||||
/*errno = EADDRINUSE; still assigned */
|
||||
Close(xfd->fd);
|
||||
return STAT_RETRYLATER;
|
||||
}
|
||||
} while (i != N);
|
||||
} else
|
||||
#endif /* WITH_TCP || WITH_UDP */
|
||||
|
||||
if (us) {
|
||||
#if WITH_UNIX
|
||||
if (pf == PF_UNIX && us != NULL) {
|
||||
applyopts_named(us->un.sun_path, opts, PH_PREOPEN);
|
||||
}
|
||||
#endif
|
||||
if (Bind(xfd->fd, &us->soa, uslen) < 0) {
|
||||
Msg4(level, "bind(%d, {%s}, "F_Zd"): %s",
|
||||
xfd->fd, sockaddr_info(&us->soa, uslen, infobuff, sizeof(infobuff)),
|
||||
uslen, strerror(errno));
|
||||
Close(xfd->fd);
|
||||
return STAT_RETRYLATER;
|
||||
}
|
||||
}
|
||||
#if WITH_UNIX
|
||||
if (pf == PF_UNIX && us != NULL) {
|
||||
applyopts_named(us->un.sun_path, opts, PH_PASTOPEN);
|
||||
}
|
||||
#endif
|
||||
|
||||
applyopts(xfd->fd, opts, PH_PASTBIND);
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -102,7 +102,7 @@ int _xioopen_dgram_sendto(/* them is already in xfd->peersa */
|
|||
union sockaddr_union *us, socklen_t uslen,
|
||||
struct opt *opts,
|
||||
int xioflags, xiosingle_t *xfd, unsigned groups,
|
||||
int pf, int socktype, int ipproto);
|
||||
int pf, int socktype, int ipproto, bool alt);
|
||||
extern
|
||||
int _xioopen_dgram_recvfrom(struct single *xfd, int xioflags,
|
||||
struct sockaddr *us, socklen_t uslen,
|
||||
|
|
|
|||
18
xio-udp.c
18
xio-udp.c
|
|
@ -410,26 +410,12 @@ int _xioopen_udp_sendto(const char *hostname, const char *servname,
|
|||
}
|
||||
|
||||
retropt_bool(opts, OPT_LOWPORT, &xfd->para.socket.ip.lowport);
|
||||
if (xfd->para.socket.ip.lowport) {
|
||||
switch (pf) {
|
||||
#if WITH_IP4
|
||||
case PF_INET:
|
||||
/*!!! this is buggy */
|
||||
us.ip4.sin_port = htons(xfd->para.socket.ip.lowport); break;
|
||||
#endif
|
||||
#if WITH_IP6
|
||||
case PF_INET6:
|
||||
/*!!! this is buggy */
|
||||
us.ip6.sin6_port = htons(xfd->para.socket.ip.lowport); break;
|
||||
#endif
|
||||
}
|
||||
needbind = true;
|
||||
}
|
||||
|
||||
xfd->dtype = XIODATA_RECVFROM;
|
||||
return _xioopen_dgram_sendto(needbind?&us:NULL, uslen,
|
||||
opts, xioflags, xfd, groups,
|
||||
pf, socktype, ipproto);
|
||||
pf, socktype, ipproto,
|
||||
xfd->para.socket.ip.lowport);
|
||||
}
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -411,7 +411,7 @@ static int xioopen_unix_sendto(int argc, const char *argv[], struct opt *opts, i
|
|||
return
|
||||
_xioopen_dgram_sendto(needbind?&us:NULL, uslen,
|
||||
opts, xioflags, xfd, groups,
|
||||
pf, socktype, protocol);
|
||||
pf, socktype, protocol, 0);
|
||||
}
|
||||
|
||||
|
||||
|
|
@ -690,7 +690,7 @@ _xioopen_unix_client(xiosingle_t *xfd, int xioflags, unsigned groups,
|
|||
if ((result =
|
||||
_xioopen_dgram_sendto(needbind?&us:NULL, uslen,
|
||||
opts, xioflags, xfd, groups,
|
||||
pf, SOCK_DGRAM, protocol))
|
||||
pf, SOCK_DGRAM, protocol, 0))
|
||||
== 0) {
|
||||
xfd->dtype = XIODATA_RECVFROM;
|
||||
break;
|
||||
|
|
|
|||
Loading…
Reference in a new issue