diff options
| author | Jo-Philipp Wich | 2019-06-27 17:27:29 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2019-10-27 17:07:35 +0100 |
| commit | 6b4960155e94076bf25518e4e268a7a5f849308e (patch) | |
| tree | b253cd4e4023364d2f0d0f20c99586d474c9234f | |
| parent | 8c3b520d4f937b1d1856898dec5f634b12d9cc36 (diff) | |
| download | busybox-6b4960155e94076bf25518e4e268a7a5f849308e.zip busybox-6b4960155e94076bf25518e4e268a7a5f849308e.tar.gz | |
nslookup: implement support for SRV records
Add support for querying and parsing SRV DNS records.
function old new delta
send_queries 1711 1865 +154
qtypes 72 80 +8
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | networking/nslookup.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/networking/nslookup.c b/networking/nslookup.c index a7dd823..c43e605 100644 --- a/networking/nslookup.c +++ b/networking/nslookup.c @@ -283,6 +283,7 @@ static const struct { { ns_t_cname, "CNAME" }, { ns_t_mx, "MX" }, { ns_t_txt, "TXT" }, + { ns_t_srv, "SRV" }, { ns_t_ptr, "PTR" }, { ns_t_any, "ANY" }, }; @@ -435,6 +436,25 @@ static int parse_reply(const unsigned char *msg, size_t len) } break; + case ns_t_srv: + if (rdlen < 6) { + //printf("SRV record too short\n"); + return -1; + } + + cp = ns_rr_rdata(rr); + n = ns_name_uncompress(ns_msg_base(handle), ns_msg_end(handle), + cp + 6, dname, sizeof(dname)); + + if (n < 0) { + //printf("Unable to uncompress domain: %s\n", strerror(errno)); + return -1; + } + + printf("%s\tservice = %u %u %u %s\n", ns_rr_name(rr), + ns_get16(cp), ns_get16(cp + 2), ns_get16(cp + 4), dname); + break; + case ns_t_soa: if (rdlen < 20) { dbg("SOA record too short:%d\n", rdlen); |