Set proper network byte order for icmp_id and icmp_seq in icmp packets

1 files changed, 11 insertions, 10 deletions

diff --git a/plugins-root/check_icmp.c b/plugins-root/check_icmp.c
index 1dde447..2a1b813 100644
--- a/plugins-root/check_icmp.c
+++ b/plugins-root/check_icmp.c
@@ -306,7 +306,7 @@ handle_random_icmp(unsigned char *packet, struct sockaddr_in *addr)
         struct rta_host *host = NULL;
 
         memcpy(&p, packet, sizeof(p));
-        if(p.icmp_type == ICMP_ECHO && p.icmp_id == pid) {
+        if(p.icmp_type == ICMP_ECHO && ntohs(p.icmp_id) == pid) {
                 /* echo request from us to us (pinging localhost) */
                 return 0;
         }
@@ -332,15 +332,15 @@ handle_random_icmp(unsigned char *packet, struct sockaddr_in *addr)
         /* might be for us. At least it holds the original package (according
          * to RFC 792). If it isn't, just ignore it */
         memcpy(&sent_icmp, packet + 28, sizeof(sent_icmp));
-        if(sent_icmp.icmp_type != ICMP_ECHO || sent_icmp.icmp_id != pid ||
-           sent_icmp.icmp_seq >= targets*packets)
+        if(sent_icmp.icmp_type != ICMP_ECHO || ntohs(sent_icmp.icmp_id) != pid ||
+           ntohs(sent_icmp.icmp_seq) >= targets*packets)
         {
                 if(debug) printf("Packet is no response to a packet we sent\n");
                 return 0;
         }
 
         /* it is indeed a response for us */
-        host = table[sent_icmp.icmp_seq/packets];
+        host = table[ntohs(sent_icmp.icmp_seq)/packets];
         if(debug) {
                 printf("Received \"%s\" from %s for ICMP ECHO sent to %s.\n",
                            get_icmp_error_msg(p.icmp_type, p.icmp_code),
@@ -763,7 +763,8 @@ wait_for_reply(int sock, u_int t)
                 /* check the response */
                 memcpy(&icp, buf + hlen, sizeof(icp));
 
-                if(icp.icmp_id != pid || icp.icmp_type != ICMP_ECHOREPLY || icp.icmp_seq >= targets*packets) {
+                if(ntohs(icp.icmp_id) != pid || icp.icmp_type != ICMP_ECHOREPLY ||
+                   ntohs(icp.icmp_seq) >= targets*packets) {
                         if(debug > 2) printf("not a proper ICMP_ECHOREPLY\n");
                         handle_random_icmp(buf + hlen, &resp_addr);
                         continue;
@@ -773,9 +774,9 @@ wait_for_reply(int sock, u_int t)
                 memcpy(&data, icp.icmp_data, sizeof(data));
                 if (debug > 2)
                         printf("ICMP echo-reply of len %u, id %u, seq %u, cksum 0x%X\n",
-                               sizeof(data), icp.icmp_id, icp.icmp_seq, icp.icmp_cksum);
+                               sizeof(data), ntohs(icp.icmp_id), ntohs(icp.icmp_seq), icp.icmp_cksum);
 
-                host = table[icp.icmp_seq/packets];
+                host = table[ntohs(icp.icmp_seq)/packets];
                 gettimeofday(&now, &tz);
                 tdiff = get_timevaldiff(&data.stime, &now);
 
@@ -845,13 +846,13 @@ send_icmp_ping(int sock, struct rta_host *host)
         packet.icp->icmp_type = ICMP_ECHO;
         packet.icp->icmp_code = 0;
         packet.icp->icmp_cksum = 0;
-        packet.icp->icmp_id = pid;
-        packet.icp->icmp_seq = host->id++;
+        packet.icp->icmp_id = htons(pid);
+        packet.icp->icmp_seq = htons(host->id++);
         packet.icp->icmp_cksum = icmp_checksum(packet.cksum_in, icmp_pkt_size);
 
         if (debug > 2)
                 printf("Sending ICMP echo-request of len %u, id %u, seq %u, cksum 0x%X to host %s\n",
-                       sizeof(data), packet.icp->icmp_id, packet.icp->icmp_seq, packet.icp->icmp_cksum, host->name);
+                       sizeof(data), ntohs(packet.icp->icmp_id), ntohs(packet.icp->icmp_seq), packet.icp->icmp_cksum, host->name);
 
         len = sendto(sock, packet.buf, icmp_pkt_size, 0, (struct sockaddr *)addr,
                                  sizeof(struct sockaddr));