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| author | ume <ume@FreeBSD.org> | 2000-09-23 15:40:12 +0000 |
|---|---|---|
| committer | ume <ume@FreeBSD.org> | 2000-09-23 15:40:12 +0000 |
| commit | 7478417f78b0803432f1cc1834c60b5b9c594d3d (patch) | |
| tree | a597c1d5f05a1af8d3da499510a1a0e922b94bd3 /contrib/tcp_wrappers | |
| parent | 54345fd41bbe91db9411f88932ea2f30315705ca (diff) | |
| download | FreeBSD-src-7478417f78b0803432f1cc1834c60b5b9c594d3d.zip FreeBSD-src-7478417f78b0803432f1cc1834c60b5b9c594d3d.tar.gz | |
Don't touch ai_canonname without checking NULL. Current
implementation of getaddrinfo() may return NULL ai_canonname.
There is no consensus how getaddrinfo() should fill ai_canonname
when numeric hostname is given.
Reported by: kris
Diffstat (limited to 'contrib/tcp_wrappers')
| -rw-r--r-- | contrib/tcp_wrappers/socket.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/contrib/tcp_wrappers/socket.c b/contrib/tcp_wrappers/socket.c index 0a24aca..3fa1f5b 100644 --- a/contrib/tcp_wrappers/socket.c +++ b/contrib/tcp_wrappers/socket.c @@ -245,7 +245,8 @@ struct host_info *host; host->name, (sin->sa_family == AF_INET) ? "AF_INET" : "AF_INET6"); - } else if (STR_NE(host->name, res0->ai_canonname) + } else if ((res0->ai_canonname == NULL + || STR_NE(host->name, res0->ai_canonname)) && STR_NE(host->name, "localhost")) { /* @@ -255,7 +256,8 @@ struct host_info *host; */ tcpd_warn("host name/name mismatch: %s != %.*s", - host->name, STRING_LENGTH, res0->ai_canonname); + host->name, STRING_LENGTH, + (res0->ai_canonname == NULL) ? "" : res0->ai_canonname); } else { @@ -294,7 +296,8 @@ struct host_info *host; getnameinfo(sin, salen, hname, sizeof(hname), NULL, 0, NI_NUMERICHOST | NI_WITHSCOPEID); tcpd_warn("host name/address mismatch: %s != %.*s", - hname, STRING_LENGTH, res0->ai_canonname); + hname, STRING_LENGTH, + (res0->ai_canonname == NULL) ? "" : res0->ai_canonname); } strcpy(host->name, paranoid); /* name is bad, clobber it */ if (res0) |
