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| author | Ulrich Drepper <drepper@redhat.com> | 2004-09-25 15:06:34 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-09-25 15:06:34 +0000 |
| commit | 007a3ddc23449fe9cba292dc7924edf39d9cc730 (patch) | |
| tree | 33a999066a5930bef11d9bb2bfa63ec0518645c5 | |
| parent | 9fd3ceaebd1e313b32096547b7bb85b9c132c357 (diff) | |
| download | glibc-007a3ddc23449fe9cba292dc7924edf39d9cc730.tar.gz glibc-007a3ddc23449fe9cba292dc7924edf39d9cc730.tar.xz glibc-007a3ddc23449fe9cba292dc7924edf39d9cc730.zip | |
(getaddrinfo): If determinination of source address fails, initialized source_addr_len field so that duplicate address recognition does not copy junk.
| -rw-r--r-- | sysdeps/posix/getaddrinfo.c | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c index b3f9f4f9b0..225c1a1088 100644 --- a/sysdeps/posix/getaddrinfo.c +++ b/sysdeps/posix/getaddrinfo.c @@ -1561,10 +1561,7 @@ getaddrinfo (const char *name, const char *service, results[i].dest_addr = q; results[i].got_source_addr = false; - /* We overwrite the type with SOCK_DGRAM since we do not - want connect() to connect to the other side. If we - cannot determine the source address remember this - fact. If we just looked up the address for a different + /* If we just looked up the address for a different protocol, reuse the result. */ if (last != NULL && last->ai_addrlen == q->ai_addrlen && memcmp (last->ai_addr, q->ai_addr, q->ai_addrlen) == 0) @@ -1576,21 +1573,28 @@ getaddrinfo (const char *name, const char *service, } else { + /* We overwrite the type with SOCK_DGRAM since we do not + want connect() to connect to the other side. If we + cannot determine the source address remember this + fact. */ int fd = __socket (q->ai_family, SOCK_DGRAM, IPPROTO_IP); - if (fd != -1) + socklen_t sl = sizeof (results[i].source_addr); + if (fd != -1 + && __connect (fd, q->ai_addr, q->ai_addrlen) == 0 + && __getsockname (fd, + (struct sockaddr *) &results[i].source_addr, + &sl) == 0) { - socklen_t sl = sizeof (results[i].source_addr); - if (__connect (fd, q->ai_addr, q->ai_addrlen) == 0 - && __getsockname (fd, - (struct sockaddr *) &results[i].source_addr, - &sl) == 0) - { - results[i].source_addr_len = sl; - results[i].got_source_addr = true; - } - - close_not_cancel_no_status (fd); + results[i].source_addr_len = sl; + results[i].got_source_addr = true; } + else + /* Just make sure that if we have to process the same + address again we do not copy any memory. */ + results[i].source_addr_len = 0; + + if (fd != -1) + close_not_cancel_no_status (fd); } /* Remember the canonical name. */ |