From 6faffd0ad23801dc540d3865bfd5bbb92e40c791 Mon Sep 17 00:00:00 2001 From: Richard Levitte Date: Fri, 12 Feb 2016 19:44:55 +0100 Subject: [PATCH] Better workaround for VMS getnameinfo() bug The actual bug with current getnameinfo() on VMS is not that it puts gibberish in the service buffer, but that it doesn't touch it at all. The gibberish we dealt with before was simply stuff that happened to be on the stack. It's better to initialise the service buffer properly (with the empty string) and check if it's still an empty string after the getnameinfo() call, and fill it with the direct numerical translation of the raw port if that's the case. Reviewed-by: Rich Salz --- crypto/bio/b_addr.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/crypto/bio/b_addr.c b/crypto/bio/b_addr.c index 459443b3d9..20ef8ec02d 100644 --- a/crypto/bio/b_addr.c +++ b/crypto/bio/b_addr.c @@ -229,7 +229,7 @@ static int addr_strings(const BIO_ADDR *ap, int numeric, if (1) { #ifdef AI_PASSIVE int ret = 0; - char host[NI_MAXHOST], serv[NI_MAXSERV]; + char host[NI_MAXHOST] = "", serv[NI_MAXSERV] = ""; int flags = 0; if (numeric) @@ -252,11 +252,13 @@ static int addr_strings(const BIO_ADDR *ap, int numeric, return 0; } - /* VMS getnameinfo() seems to have a bug, where serv gets filled - * with gibberish. We can at least check for digits when flags - * has NI_NUMERICSERV enabled + /* VMS getnameinfo() has a bug, it doesn't fill in serv, which + * leaves it with whatever garbage that happens to be there. + * However, we initialise serv with the empty string (serv[0] + * is therefore NUL), so it gets real easy to detect when things + * didn't go the way one might expect. */ - if ((flags & NI_NUMERICSERV) != 0 && !isdigit(serv[0])) { + if (serv[0] == '\0') { BIO_snprintf(serv, sizeof(serv), "%d", ntohs(BIO_ADDR_rawport(ap))); } -- 2.34.1