diff options
Diffstat (limited to 'src/network/getnameinfo.c')
| -rw-r--r-- | src/network/getnameinfo.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/network/getnameinfo.c b/src/network/getnameinfo.c index 949e1811..133c15b3 100644 --- a/src/network/getnameinfo.c +++ b/src/network/getnameinfo.c @@ -58,6 +58,7 @@ static void reverse_hosts(char *buf, const unsigned char *a, unsigned scopeid, i if ((p=strchr(line, '#'))) *p++='\n', *p=0; for (p=line; *p && !isspace(*p); p++); + if (!*p) continue; *p++ = 0; if (__lookup_ipliteral(&iplit, line, AF_UNSPEC)<=0) continue; @@ -108,10 +109,10 @@ static void reverse_services(char *buf, int port, int dgram) __fclose_ca(f); } -static int dns_parse_callback(void *c, int rr, const void *data, int len, const void *packet) +static int dns_parse_callback(void *c, int rr, const void *data, int len, const void *packet, int plen) { if (rr != RR_PTR) return 0; - if (__dn_expand(packet, (const unsigned char *)packet + 512, + if (__dn_expand(packet, (const unsigned char *)packet + plen, data, c, 256) <= 0) *(char *)c = 0; return 0; @@ -161,8 +162,10 @@ int getnameinfo(const struct sockaddr *restrict sa, socklen_t sl, query[3] = 0; /* don't need AD flag */ int rlen = __res_send(query, qlen, reply, sizeof reply); buf[0] = 0; - if (rlen > 0) + if (rlen > 0) { + if (rlen > sizeof reply) rlen = sizeof reply; __dns_parse(reply, rlen, dns_parse_callback, buf); + } } if (!*buf) { if (flags & NI_NAMEREQD) return EAI_NONAME; |