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socket-util: Make inet_open_passive() pass back the bound address.

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This feature is useful in an upcoming commit.
This commit is contained in:
Ben Pfaff
2010-01-07 15:00:47 -08:00
parent e1bd3bee5c
commit 36775dad35
4 changed files with 26 additions and 6 deletions
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23
lib/socket-util.c
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@@ -400,9 +400,13 @@ exit:
* For TCP, the socket will have SO_REUSEADDR turned on.
*
* On success, returns a non-negative file descriptor. On failure, returns a
* negative errno value. */
* negative errno value.
*
* If 'sinp' is non-null, then on success the bound address is stored into
* '*sinp'. */
int
inet_open_passive(int style, const char *target_, int default_port)
inet_open_passive(int style, const char *target_, int default_port,
struct sockaddr_in *sinp)
{
char *target = xstrdup(target_);
char *string_ptr = target;
@@ -468,6 +472,21 @@ inet_open_passive(int style, const char *target_, int default_port)
VLOG_ERR("%s: listen: %s", target_, strerror(error));
goto exit_close;
}
if (sinp) {
socklen_t sin_len = sizeof sin;
if (getsockname(fd, (struct sockaddr *) &sin, &sin_len) < 0){
error = errno;
VLOG_ERR("%s: getsockname: %s", target_, strerror(error));
goto exit_close;
}
if (sin.sin_family != AF_INET || sin_len != sizeof sin) {
VLOG_ERR("%s: getsockname: invalid socket name", target_);
goto exit_close;
}
*sinp = sin;
}
error = 0;
goto exit;