First test version.

[icmp-dn.git] / idnlookup.c

diff --git a/idnlookup.c b/idnlookup.c
new file mode 100644 (file)
index 0000000..e2632df
--- /dev/null
+++ b/idnlookup.c
@@ -0,0 +1,48 @@
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/types.h>
+
+struct icmphdr {
+    u_int8_t type;
+    u_int8_t code;
+    u_int16_t checksum;
+    u_int16_t id;
+    u_int16_t seq;
+};
+
+#define ICMP_NAMEREQ 37
+#define ICMP_NAMEREP 38
+
+int main(int argc, char **argv)
+{
+    int ret;
+    int s;
+    struct sockaddr_in host;
+    struct icmphdr data;
+    
+    if((s = socket(PF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) {
+       perror("could not create raw socket");
+       exit(1);
+    }
+    
+    host.sin_family = AF_INET;
+    inet_aton("192.168.1.254", &host.sin_addr);
+    
+    memset(&data, 0, sizeof(data));
+    data.type = ICMP_NAMEREQ;
+    
+    ret = sendto(s, &data, sizeof(data), 0, (struct sockaddr *)&host, sizeof(host));
+    if(ret < 0) {
+       perror("sendto");
+    } else {
+       printf("%i\n", ret);
+    }
+    close(s);
+    return(0);
+}