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authorPhilipp Maier <pmaier@sysmocom.de>2018-01-22 16:56:27 +0100
committerPhilipp Maier <pmaier@sysmocom.de>2018-01-22 17:04:29 +0100
commit91cfda81b57ae62ddaf465093e847875c8b1d932 (patch)
tree8879d39dbc28cc5390174ae5b3603f3d45c5f811 /src
parent49382720f8d5b4e270fae197156cd69292d42ffc (diff)
socket: use inet_ntop() instead of inet_ntoa() in osmo_sock_local_ip()
The function inet_ntoa() stores its result in a static buffer and returns the pointer. When inet_ntoa() is called subsequently it overwrite the content of its static buffer with the new result. Since we osmo_sock_local_ip() is a library function we should use the more safe variant inet_ntop() in order to prevent unintentionally overwriting data that the caller might still need. Such an error would be hard to find. - Use the more safe inet_ntop() inestead of inet_ntoa() Change-Id: I9852b57736432032542bd96b6fdd4a2f08fc1f64
Diffstat (limited to 'src')
-rw-r--r--src/socket.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/socket.c b/src/socket.c
index 35cce643..03789700 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -831,9 +831,9 @@ int osmo_sock_local_ip(char *local_ip, const char *remote_ip)
if (rc < 0)
return -EINVAL;
if (local_addr.sin_family == AF_INET)
- strncpy(local_ip, inet_ntoa(local_addr.sin_addr), INET_ADDRSTRLEN);
+ inet_ntop(AF_INET, &local_addr.sin_addr, local_ip, INET_ADDRSTRLEN);
else if (local_addr.sin_family == AF_INET6)
- strncpy(local_ip, inet_ntoa(local_addr.sin_addr), INET6_ADDRSTRLEN);
+ inet_ntop(AF_INET6, &local_addr.sin_addr, local_ip, INET6_ADDRSTRLEN);
else
return -EINVAL;