Initial version

Working ping back and forth with specified data, and data
arrives at the other party.

Currently, the server uses nflog to get the pings, which:
1. requires iptables settings to work;
2. buffers and collects messages for a second.
Both are suboptimal, and I believe raw sockets can improve
on this.

1 files changed, 30 insertions, 0 deletions

diff --git a/client.c b/client.c
new file mode 100644
index 0000000..527375f
--- /dev/null
+++ b/client.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/ip_icmp.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include "icmp.h"
+#include "util.h"
+
+int main(void) {
+	int sock = icmp_open_socket();
+	if (sock < 0) {
+		perror("icmp_open_socket");
+		return 1;
+	}
+
+	const char *ip_address = "127.0.0.1";
+	// const char *ip_address = "192.168.43.220";
+
+	struct icmp_reply reply = icmp_communicate(sock, ip_address, 1234, "kaashandel", 10);
+	if (reply.data == NULL) {
+		perror("icmp_communicate");
+		return 1;
+	}
+
+	printf("Received length: %zd\nPayload:\n", reply.length);
+	xxd(reply.data, reply.length);
+}