1 files changed, 8 insertions, 0 deletions

diff --git a/networking/ping.c b/networking/ping.c
index cfe682646..d8767a39f 100644
--- a/networking/ping.c
+++ b/networking/ping.c
@@ -186,6 +186,7 @@ create_icmp_socket(void)
 struct globals {
         char *hostname;
         char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
+        uint16_t myid;
 } FIX_ALIASING;
 #define G (*(struct globals*)bb_common_bufsiz1)
 #define INIT_G() do { setup_common_bufsiz(); } while (0)
@@ -204,6 +205,7 @@ static void ping4(len_and_sockaddr *lsa)
         pkt = (struct icmp *) G.packet;
         /*memset(pkt, 0, sizeof(G.packet)); already is */
         pkt->icmp_type = ICMP_ECHO;
+        pkt->icmp_id = G.myid;
         pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, sizeof(G.packet));
 
         xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len);
@@ -228,6 +230,8 @@ static void ping4(len_and_sockaddr *lsa)
                         struct iphdr *iphdr = (struct iphdr *) G.packet;
 
                         pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2));   /* skip ip hdr */
+                        if (pkt->icmp_id != G.myid)
+                                continue; /* not our ping */
                         if (pkt->icmp_type == ICMP_ECHOREPLY)
                                 break;
                 }
@@ -246,6 +250,7 @@ static void ping6(len_and_sockaddr *lsa)
         pkt = (struct icmp6_hdr *) G.packet;
         /*memset(pkt, 0, sizeof(G.packet)); already is */
         pkt->icmp6_type = ICMP6_ECHO_REQUEST;
+        pkt->icmp6_id = G.myid;
 
         sockopt = offsetof(struct icmp6_hdr, icmp6_cksum);
         setsockopt_int(pingsock, SOL_RAW, IPV6_CHECKSUM, sockopt);
@@ -269,6 +274,8 @@ static void ping6(len_and_sockaddr *lsa)
                         continue;
                 }
                 if (c >= ICMP_MINLEN) { /* icmp6_hdr */
+                        if (pkt->icmp6_id != G.myid)
+                                continue; /* not our ping */
                         if (pkt->icmp6_type == ICMP6_ECHO_REPLY)
                                 break;
                 }
@@ -317,6 +324,7 @@ static int common_ping_main(sa_family_t af, char **argv)
         alarm(5); /* give the host 5000ms to respond */
 
         create_icmp_socket(lsa);
+        G.myid = (uint16_t) getpid();
 #if ENABLE_PING6
         if (lsa->u.sa.sa_family == AF_INET6)
                 ping6(lsa);