diff options
Diffstat (limited to 'nametoaddr.c')
| -rw-r--r-- | nametoaddr.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/nametoaddr.c b/nametoaddr.c index 194ff45b..7c48bd3a 100644 --- a/nametoaddr.c +++ b/nametoaddr.c @@ -231,7 +231,22 @@ pcap_nametonetaddr(const char *name) int h_errnoval; int err; - err = getnetbyname_r(name, &result_buf, buf, sizeof buf, &np, + /* + * Apparently, the man page at + * + * http://man7.org/linux/man-pages/man3/getnetbyname_r.3.html + * + * lies when it says + * + * If the function call successfully obtains a network record, + * then *result is set pointing to result_buf; otherwise, *result + * is set to NULL. + * + * and, in fact, at least in some versions of GNU libc, it does + * *not* always get set if getnetbyname_r() succeeds. + */ + np = NULL; + err = getnetbyname_r(name, &result_buf, buf, sizeof buf, &np, &h_errnoval); if (err != 0) { /* |