-From 8c1440a0934dd8b3ad6aae48d6653b5ba6fce8a1 Mon Sep 17 00:00:00 2001
+From 1188f159e0b0a9c07bed835c7313bedf5322a9e3 Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jo@mein.io>
Date: Tue, 14 Mar 2017 22:21:34 +0100
Subject: [PATCH] networking: add LEDE nslookup applet
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
---
- Makefile.flags | 6 +
- networking/nslookup_lede.c | 869 +++++++++++++++++++++++++++++++++++++++++++++
- 2 files changed, 875 insertions(+)
+ networking/nslookup_lede.c | 894 +++++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 894 insertions(+)
create mode 100644 networking/nslookup_lede.c
-diff --git a/Makefile.flags b/Makefile.flags
-index 65021de..096ab77 100644
---- a/Makefile.flags
-+++ b/Makefile.flags
-@@ -134,6 +134,12 @@ else
- LDLIBS += m
- endif
-
-+# nslookup_lede might need the resolv library
-+RESOLV_AVAILABLE := $(shell echo 'int main(void){res_init();return 0;}' >resolvtest.c; $(CC) $(CFLAGS) -include resolv.h -lresolv -o /dev/null resolvtest.c >/dev/null 2>&1 && echo "y"; rm resolvtest.c)
-+ifeq ($(RESOLV_AVAILABLE),y)
-+LDLIBS += resolv
-+endif
-+
- # libpam may use libpthread, libdl and/or libaudit.
- # On some platforms that requires an explicit -lpthread, -ldl, -laudit.
- # However, on *other platforms* it fails when some of those flags
diff --git a/networking/nslookup_lede.c b/networking/nslookup_lede.c
new file mode 100644
-index 0000000..fe927ad
+index 000000000..f3e42d3bb
--- /dev/null
+++ b/networking/nslookup_lede.c
-@@ -0,0 +1,869 @@
+@@ -0,0 +1,894 @@
+/*
+ * nslookup_lede - musl compatible replacement for busybox nslookup
+ *
+ { ns_t_soa, "SOA" },
+ { ns_t_ns, "NS" },
+ { ns_t_a, "A" },
++#if ENABLE_FEATURE_IPV6
+ { ns_t_aaaa, "AAAA" },
++#endif
+ { ns_t_cname, "CNAME" },
+ { ns_t_mx, "MX" },
+ { ns_t_txt, "TXT" },
+ printf("Name:\t%s\nAddress: %s\n", ns_rr_name(rr), astr);
+ break;
+
++#if ENABLE_FEATURE_IPV6
+ case ns_t_aaaa:
+ if (rdlen != 16) {
+ //fprintf(stderr, "Unexpected AAAA record length\n");
+ inet_ntop(AF_INET6, ns_rr_rdata(rr), astr, sizeof(astr));
+ printf("%s\thas AAAA address %s\n", ns_rr_name(rr), astr);
+ break;
++#endif
+
+ case ns_t_ns:
+ if (!format)
+ }
+ }
+
++#if ENABLE_FEATURE_IPV6
+ if (inet_pton(AF_INET6, addrstr, &lsa->u.sin6.sin6_addr)) {
+ lsa->u.sin6.sin6_family = AF_INET6;
+ lsa->u.sin6.sin6_port = htons(port);
+ lsa->len = sizeof(lsa->u.sin6);
+ return 0;
+ }
++#endif
+
+ if (!scope && inet_pton(AF_INET, addrstr, &lsa->u.sin.sin_addr)) {
+ lsa->u.sin.sin_family = AF_INET;
+ return (unsigned long)ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
+}
+
++#if ENABLE_FEATURE_IPV6
+static void to_v4_mapped(len_and_sockaddr *a)
+{
+ if (a->u.sa.sa_family != AF_INET)
+ a->u.sin6.sin6_scope_id = 0;
+ a->len = sizeof(a->u.sin6);
+}
++#endif
+
+
+/*
+ int fd;
+ int timeout = default_timeout * 1000, retry_interval, servfail_retry = 0;
+ len_and_sockaddr from = { };
++#if ENABLE_FEATURE_IPV6
+ int one = 1;
++#endif
+ int recvlen = 0;
+ int n_replies = 0;
+ struct pollfd pfd;
+ from.u.sa.sa_family = AF_INET;
+ from.len = sizeof(from.u.sin);
+
++#if ENABLE_FEATURE_IPV6
+ for (nn = 0; nn < n_ns; nn++) {
+ if (ns[nn].addr.u.sa.sa_family == AF_INET6) {
+ from.u.sa.sa_family = AF_INET6;
+ break;
+ }
+ }
++#endif
+
+ /* Get local address and open/bind a socket */
+ fd = socket(from.u.sa.sa_family, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+
++#if ENABLE_FEATURE_IPV6
+ /* Handle case where system lacks IPv6 support */
+ if (fd < 0 && from.u.sa.sa_family == AF_INET6 && errno == EAFNOSUPPORT) {
+ fd = socket(AF_INET, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
+ from.u.sa.sa_family = AF_INET;
+ }
++#endif
+
+ if (fd < 0)
+ return -1;
+ return -1;
+ }
+
++#if ENABLE_FEATURE_IPV6
+ /* Convert any IPv4 addresses in a mixed environment to v4-mapped */
+ if (from.u.sa.sa_family == AF_INET6) {
+ setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
+ for (nn = 0; nn < n_ns; nn++)
+ to_v4_mapped(&ns[nn].addr);
+ }
++#endif
+
+ pfd.fd = fd;
+ pfd.events = POLLIN;
+ for (aip = ai; aip; aip = aip->ai_next) {
+ if (aip->ai_addr->sa_family != AF_INET &&
+ aip->ai_addr->sa_family != AF_INET6)
-+ continue;
++ continue;
++
++#if ! ENABLE_FEATURE_IPV6
++ if (aip->ai_addr->sa_family != AF_INET)
++ continue;
++#endif
+
+ tmp = realloc(*ns, sizeof(**ns) * (*n_ns + 1));
+
+ static char buf[INET6_ADDRSTRLEN + 1 + IFNAMSIZ + 1 + 5 + 1];
+ char *p = buf;
+
++#if ENABLE_FEATURE_IPV6
+ if (a->u.sa.sa_family == AF_INET6) {
+ inet_ntop(AF_INET6, &a->u.sin6.sin6_addr, buf, sizeof(buf));
+ p += strlen(p);
+ }
+ }
+ }
-+ else {
++ else
++#endif
++ {
+ inet_ntop(AF_INET, &a->u.sin.sin_addr, buf, sizeof(buf));
+ p += strlen(p);
+ }
+
-+ sprintf(p, "#%hu", ntohs(a->u.sin6.sin6_port));
++ sprintf(p, "#%hu", ntohs(a->u.sin.sin_port));
+
+ return buf;
+}
+ applet_long_options = nslookup_longopts;
+#endif
+
++ opt_complementary = "q::";
+ opts = getopt32(argv, "+q:*p:+r:+t:+s",
+ &type_strings, &default_port,
+ &default_retry, &default_timeout);
+ return rc;
+}
--
-2.1.4
+2.11.0
projects / openwrt / openwrt.git / blobdiff