diff options
| author | Todd C. Miller <millert@cvs.openbsd.org> | 2014-02-05 14:20:44 +0000 |
|---|---|---|
| committer | Todd C. Miller <millert@cvs.openbsd.org> | 2014-02-05 14:20:44 +0000 |
| commit | c799e9b3bda3d267e984e0467e2a8aad98096a50 (patch) | |
| tree | 121514e15abd3dd6c03b4dba63c368317110a134 /lib/libc/net | |
| parent | 97a18ab3a1fcde76829bd0a795a6a71917bddbcd (diff) | |
Always set errno when returning NULL. OK kettenis@ henning@
Diffstat (limited to 'lib/libc/net')
| -rw-r--r-- | lib/libc/net/inet_ntop.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/lib/libc/net/inet_ntop.c b/lib/libc/net/inet_ntop.c index 9deb352e24e..359acd8cda4 100644 --- a/lib/libc/net/inet_ntop.c +++ b/lib/libc/net/inet_ntop.c @@ -1,4 +1,4 @@ -/* $OpenBSD: inet_ntop.c,v 1.8 2008/12/09 19:38:38 otto Exp $ */ +/* $OpenBSD: inet_ntop.c,v 1.9 2014/02/05 14:20:43 millert Exp $ */ /* Copyright (c) 1996 by Internet Software Consortium. * @@ -34,7 +34,7 @@ static const char *inet_ntop4(const u_char *src, char *dst, size_t size); static const char *inet_ntop6(const u_char *src, char *dst, size_t size); -/* char * +/* const char * * inet_ntop(af, src, dst, size) * convert a network format address to presentation format. * return: @@ -148,16 +148,20 @@ inet_ntop6(const u_char *src, char *dst, size_t size) if (best.base != -1 && i >= best.base && i < (best.base + best.len)) { if (i == best.base) { - if (tp + 1 >= ep) + if (tp + 1 >= ep) { + errno = ENOSPC; return (NULL); + } *tp++ = ':'; } continue; } /* Are we following an initial run of 0x00s or any real hex? */ if (i != 0) { - if (tp + 1 >= ep) + if (tp + 1 >= ep) { + errno = ENOSPC; return (NULL); + } *tp++ = ':'; } /* Is this address an encapsulated IPv4? */ @@ -169,18 +173,24 @@ inet_ntop6(const u_char *src, char *dst, size_t size) break; } advance = snprintf(tp, ep - tp, "%x", words[i]); - if (advance <= 0 || advance >= ep - tp) + if (advance <= 0 || advance >= ep - tp) { + errno = ENOSPC; return (NULL); + } tp += advance; } /* Was it a trailing run of 0x00's? */ if (best.base != -1 && (best.base + best.len) == (IN6ADDRSZ / INT16SZ)) { - if (tp + 1 >= ep) + if (tp + 1 >= ep) { + errno = ENOSPC; return (NULL); + } *tp++ = ':'; } - if (tp + 1 >= ep) + if (tp + 1 >= ep) { + errno = ENOSPC; return (NULL); + } *tp++ = '\0'; /* |