diff options
Diffstat (limited to 'src/network')
| -rw-r--r-- | src/network/getnameinfo.c | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/src/network/getnameinfo.c b/src/network/getnameinfo.c index 708ec5e0..588ed765 100644 --- a/src/network/getnameinfo.c +++ b/src/network/getnameinfo.c @@ -45,13 +45,13 @@ static void mkptr6(char *s, const unsigned char *ip) strcpy(s, "ip6.arpa"); } -static char *reverse_hosts(char *buf, const unsigned char *a, unsigned scopeid, int family) +static void reverse_hosts(char *buf, const unsigned char *a, unsigned scopeid, int family) { char line[512], *p, *z; unsigned char _buf[1032], atmp[16]; struct address iplit; FILE _f, *f = __fopen_rb_ca("/etc/hosts", &_f, _buf, sizeof _buf); - if (!f) return 0; + if (!f) return; if (family == AF_INET) { memcpy(atmp+12, a, 4); memcpy(atmp, "\0\0\0\0\0\0\0\0\0\0\xff\xff", 12); @@ -83,7 +83,32 @@ static char *reverse_hosts(char *buf, const unsigned char *a, unsigned scopeid, } } __fclose_ca(f); - return 0; +} + +static void reverse_services(char *buf, int port, int dgram) +{ + unsigned long svport; + char line[128], *p, *z; + unsigned char _buf[1032]; + FILE _f, *f = __fopen_rb_ca("/etc/services", &_f, _buf, sizeof _buf); + if (!f) return; + while (fgets(line, sizeof line, f)) { + if ((p=strchr(line, '#'))) *p++='\n', *p=0; + + for (p=line; *p && !isspace(*p); p++); + if (!p) continue; + *p++ = 0; + svport = strtoul(p, &z, 10); + + if (svport != port || z==p) continue; + if (dgram && strncmp(z, "/udp", 4)) continue; + if (!dgram && strncmp(z, "/tcp", 4)) continue; + if (p-line > 32) continue; + + memcpy(buf, line, p-line); + break; + } + __fclose_ca(f); } static int dns_parse_callback(void *c, int rr, const void *data, int len, const void *packet) @@ -162,7 +187,13 @@ int getnameinfo(const struct sockaddr *restrict sa, socklen_t sl, } if (serv && servlen) { - char *p = itoa(num, ntohs(((struct sockaddr_in *)sa)->sin_port)); + char *p = buf; + int port = ntohs(((struct sockaddr_in *)sa)->sin_port); + buf[0] = 0; + if (!(flags & NI_NUMERICSERV)) + reverse_services(buf, port, flags & NI_DGRAM); + if (!*p) + p = itoa(num, port); if (strlen(p) >= servlen) return EAI_OVERFLOW; strcpy(serv, p); |