Better ICMP code encapsulation

1 files changed, 23 insertions, 0 deletions

diff --git a/icmp_client.h b/icmp_client.h
new file mode 100644
index 0000000..78cfe7a
--- /dev/null
+++ b/icmp_client.h
@@ -0,0 +1,23 @@
+#pragma once
+
+#include "icmp.h"
+
+
+struct icmp_client_incoming {
+	const uint8_t *data;  // points to internal buffer
+	size_t length;  // length of 'data'
+
+	int id, seqnum;
+};
+
+// Returns -1 on error with errno.
+int icmp_client_open_socket(void);
+
+// Only actual IPv4 addresses allowed. Sends data in 'data' with length 'length', and
+// returns pointer to internal buffer with reply data. Buffer is invalidated on next
+// call to the function.
+// Returns {.data=NULL} on error with errno.
+struct icmp_client_incoming icmp_client_communicate(
+		int sock, const char *ip_address,
+		int id, int seqnum,
+		const void *data, size_t length);