Fix libnet_build_igmp() to not reverse the order of the ip address.

libnet APIs that take IP addresses as a uint32_t expect them to
already be in network byte order.

2 files changed, 2 insertions, 2 deletions

diff --git a/libnet/include/libnet/libnet-functions.h b/libnet/include/libnet/libnet-functions.h
index 5bcfdbf..7cc3060 100644
--- a/libnet/include/libnet/libnet-functions.h
+++ b/libnet/include/libnet/libnet-functions.h
@@ -799,7 +799,7 @@ uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag);
  * @param type packet type
  * @param code packet code (should be 0)
  * @param sum checksum (0 for libnet to autofill)
- * @param ip IPv4 address
+ * @param ip IPv4 address (in standard/network byte order)
  * @param payload optional payload or NULL
  * @param payload_s payload length or 0
  * @param l pointer to a libnet context
diff --git a/libnet/src/libnet_build_igmp.c b/libnet/src/libnet_build_igmp.c
index bb0e14a..9dd5bc6 100644
--- a/libnet/src/libnet_build_igmp.c
+++ b/libnet/src/libnet_build_igmp.c
@@ -69,7 +69,7 @@ const uint8_t *payload, uint32_t payload_s, libnet_t *l, libnet_ptag_t ptag)
     igmp_hdr.igmp_type         = type;    /* packet type */
     igmp_hdr.igmp_code         = code;    /* packet code */
     igmp_hdr.igmp_sum          = (sum ? htons(sum) : 0);  /* packet checksum */
-    igmp_hdr.igmp_group.s_addr = htonl(ip);
+    igmp_hdr.igmp_group.s_addr = ip;
 
     n = libnet_pblock_append(l, p, (uint8_t *)&igmp_hdr, LIBNET_IGMP_H);
     if (n == -1)