geomyidae

A small C-based gopherd. (gopher://bitreich.org/1/scm/geomyidae)
git clone git://r-36.net/geomyidae
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commit bc06de10b6d279ef57ad0ba294610447bd2988fc
parent f02d57cfae2c18951b665353b21aed02d29731a9
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Wed, 29 Aug 2018 20:31:30 +0200

fix uninitialized buffer for getnameinfo on failure

POSIX says for getnameinfo:
"Upon successful completion, getnameinfo() shall return the node and service
names, if requested, in the buffers provided. The returned names are always
null-terminated strings."

How I interpret it is on failure these buffers can be undefined, so make sure
to clear them on failure.

Signed-off-by: Christoph Lohmann <20h@r-36.net>

Diffstat:
main.c | 6++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/main.c b/main.c @@ -558,9 +558,11 @@ main(int argc, char *argv[]) } } - getnameinfo((struct sockaddr *)&clt, cltlen, clienth, + if (getnameinfo((struct sockaddr *)&clt, cltlen, clienth, sizeof(clienth), clientp, sizeof(clientp), - NI_NUMERICHOST|NI_NUMERICSERV); + NI_NUMERICHOST|NI_NUMERICSERV)) { + clienth[0] = clientp[0] = '\0'; + } if (!strncmp(clienth, "::ffff:", 7)) memmove(clienth, clienth+7, strlen(clienth)-6);