X-Git-Url: https://git.distorted.org.uk/~mdw/tripe/blobdiff_plain/102fa2f087554901001abcd106160a4ea0668206..HEAD:/pathmtu/pathmtu.c

diff --git a/pathmtu/pathmtu.c b/pathmtu/pathmtu.c
index 4eba80d6..9c5c8294 100644
--- a/pathmtu/pathmtu.c
+++ b/pathmtu/pathmtu.c
@@ -51,9 +51,11 @@
 #include <netinet/icmp6.h>
 #include <netinet/udp.h>
 
-#include <net/if.h>
-#include <ifaddrs.h>
-#include <sys/ioctl.h>
+#ifdef HAVE_GETIFADDRS
+#  include <net/if.h>
+#  include <ifaddrs.h>
+#  include <sys/ioctl.h>
+#endif
 
 #include <mLib/alloc.h>
 #include <mLib/bits.h>
@@ -132,23 +134,6 @@ static size_t addrsz(const union addr *a)
   }
 }
 
-/* Compare two addresses.  Maybe compare the port numbers too. */
-#define AEF_PORT 1u
-static int addreq(const union addr *a, const union addr *b, unsigned f)
-{
-  switch (a->sa.sa_family) {
-    case AF_INET:
-      return (a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr &&
-	      (!(f&AEF_PORT) || a->sin.sin_port == b->sin.sin_port));
-    case AF_INET6:
-      return (!memcmp(a->sin6.sin6_addr.s6_addr,
-		      b->sin6.sin6_addr.s6_addr, 16) &&
-	      (!(f&AEF_PORT) || a->sin6.sin6_port == b->sin6.sin6_port));
-    default:
-      abort();
-  }
-}
-
 /*----- Main algorithm skeleton -------------------------------------------*/
 
 struct param {
@@ -403,8 +388,10 @@ fail_0:
 
 /*----- Doing it the hard way ---------------------------------------------*/
 
+#ifdef HAVE_GETIFADDRS
+
 #if defined(linux) || defined(__OpenBSD__)
-#define IPHDR_SANE
+#  define IPHDR_SANE
 #endif
 
 #ifdef IPHDR_SANE
@@ -420,6 +407,23 @@ static int rawicmp6 = -1, rawudp6 = -1, rawerr6 = 0;
 
 #define IPCK_INIT 0xffff
 
+/* Compare two addresses.  Maybe compare the port numbers too. */
+#define AEF_PORT 1u
+static int addreq(const union addr *a, const union addr *b, unsigned f)
+{
+  switch (a->sa.sa_family) {
+    case AF_INET:
+      return (a->sin.sin_addr.s_addr == b->sin.sin_addr.s_addr &&
+	      (!(f&AEF_PORT) || a->sin.sin_port == b->sin.sin_port));
+    case AF_INET6:
+      return (!memcmp(a->sin6.sin6_addr.s6_addr,
+		      b->sin6.sin6_addr.s6_addr, 16) &&
+	      (!(f&AEF_PORT) || a->sin6.sin6_port == b->sin6.sin6_port));
+    default:
+      abort();
+  }
+}
+
 /* Compute an IP checksum over some data.  This is a restartable interface:
  * initialize A to `IPCK_INIT' for the first call.
  */
@@ -794,6 +798,8 @@ static const struct probe_ops raw_ops = {
 #undef OPS_CHAIN
 #define OPS_CHAIN &raw_ops
 
+#endif
+
 /*----- Doing the job on Linux --------------------------------------------*/
 
 #if defined(linux)
@@ -963,12 +969,14 @@ int main(int argc, char *argv[])
 
 #define f_bogus 1u
 
+#ifdef HAVE_GETIFADDRS
   if ((rawicmp = socket(PF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0 ||
       (rawudp = socket(PF_INET, SOCK_RAW, IPPROTO_UDP)) < 0)
     rawerr = errno;
   if ((rawicmp6 = socket(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0 ||
       (rawudp6 = socket(PF_INET6, SOCK_RAW, IPPROTO_RAW)) < 0)
     rawerr6 = errno;
+#endif
   if (setuid(getuid()))
     abort();