65 lines
1.7 KiB
Diff
65 lines
1.7 KiB
Diff
commit c254b435007ebd4ed471737198975d5ccf4e7949
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Author: Steve Dickson <steved@redhat.com>
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Date: Thu Apr 26 17:20:21 2007 -0400
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Added a optimization to bindresvport that allows more
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ports to be tried.
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Signed-off-by: Steve Dickson <steved@redhat.com>
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diff --git a/src/bindresvport.c b/src/bindresvport.c
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index b197efa..bc75d29 100644
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--- a/src/bindresvport.c
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+++ b/src/bindresvport.c
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@@ -62,6 +62,7 @@ bindresvport(sd, sin)
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#ifdef __linux__
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#define STARTPORT 600
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+#define LOWPORT 512
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#define ENDPORT (IPPORT_RESERVED - 1)
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#define NPORTS (ENDPORT - STARTPORT + 1)
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@@ -76,10 +77,13 @@ bindresvport_sa(sd, sa)
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#ifdef INET6
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struct sockaddr_in6 *sin6;
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#endif
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- u_int16_t port;
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u_int16_t *portp;
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+ static u_int16_t port;
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+ static short startport = STARTPORT;
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socklen_t salen;
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- int i;
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+ int nports = ENDPORT - startport + 1;
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+ int endport = ENDPORT;
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+ int i;
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if (sa == NULL) {
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salen = sizeof(myaddr);
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@@ -119,13 +123,22 @@ bindresvport_sa(sd, sa)
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}
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res = -1;
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errno = EADDRINUSE;
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- for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; i++) {
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+ again:
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+ for (i = 0; i < nports; ++i) {
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*portp = htons(port++);
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- if (port > ENDPORT) {
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- port = STARTPORT;
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- }
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+ if (port > endport)
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+ port = startport;
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res = bind(sd, sa, salen);
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+ if (res >= 0 || errno != EADDRINUSE)
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+ break;
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}
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+ if (i == nports && startport != LOWPORT) {
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+ startport = LOWPORT;
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+ endport = STARTPORT - 1;
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+ nports = STARTPORT - LOWPORT;
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+ port = LOWPORT + port % (STARTPORT - LOWPORT);
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+ goto again;
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+ }
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return (res);
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}
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#else
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