busybox: add SRV support to nslookup_lede.c patch
authorPerry Melange <isprotejesvalkata@gmail.com>
Tue, 30 Jul 2019 09:05:22 +0000 (11:05 +0200)
committerPaul Spooren <mail@aparcar.org>
Thu, 13 May 2021 22:13:45 +0000 (00:13 +0200)
Add support for querying and parsing SRV DNS records to nslookup_lede.c

This patch is based on http://lists.busybox.net/pipermail/busybox/2019-June/087359.html

Signed-off-by: Perry Melange <isprotejesvalkata@gmail.com>
[reword subject, bump PKG_RELEASE]
Signed-off-by: Paul Spooren <mail@aparcar.org>
(cherry picked from commit 3a359398f04f3f4c4a42d1ca274bb1a0f0303e05)

package/utils/busybox/Makefile
package/utils/busybox/patches/230-add_nslookup_lede.patch

index 58bc1e6..b69e718 100644 (file)
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=busybox
 PKG_VERSION:=1.33.0
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 PKG_FLAGS:=essential
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
index 446b01c..280d4e2 100644 (file)
@@ -34,7 +34,7 @@ Signed-off-by: Jo-Philipp Wich <jo@mein.io>
  # However, on *other platforms* it fails when some of those flags
 --- /dev/null
 +++ b/networking/nslookup_lede.c
-@@ -0,0 +1,914 @@
+@@ -0,0 +1,934 @@
 +/*
 + * nslookup_lede - musl compatible replacement for busybox nslookup
 + *
@@ -128,6 +128,7 @@ Signed-off-by: Jo-Philipp Wich <jo@mein.io>
 +      { ns_t_cname, "CNAME" },
 +      { ns_t_mx,    "MX"    },
 +      { ns_t_txt,   "TXT"   },
++      { ns_t_srv,   "SRV"   },
 +      { ns_t_ptr,   "PTR"   },
 +      { ns_t_any,   "ANY"   },
 +      { }
@@ -259,6 +260,25 @@ Signed-off-by: Jo-Philipp Wich <jo@mein.io>
 +                      }
 +                      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 = %hu %hu %hu %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) {
 +                              //fprintf(stderr, "SOA record too short\n");