raw: Add usage function to simple test.

diff --git a/src/raw/swift_raw_simple_test.c b/src/raw/swift_raw_simple_test.c
index 73fc344..dfd1a11 100644 (file)
--- a/src/raw/swift_raw_simple_test.c
+++ b/src/raw/swift_raw_simple_test.c
@@ -15,6 +15,11 @@
 #include "debug.h"
 #include "util.h"
 
+static void usage(const char *argv0)
+{
+       fprintf(stderr, "Usage: %s local_address swift_hash [remote_address]\n", argv0);
+}
+
 /*
  * Create a socket, bind it and send data.
  */
@@ -27,8 +32,8 @@ int main(int argc, char *argv[])
        ssize_t bytes_sent;
        int rc;
 
-       if (argc < 3 || argc > 4) {
-               fprintf(stderr,"Usage \"./client ip_local hash ip_dest?\" .");
+       if (argc != 3 && argc != 4) {
+               usage(argv[0]);
                exit(EXIT_FAILURE);
        }
 
@@ -43,7 +48,7 @@ int main(int argc, char *argv[])
 
        if (argc > 3) {
                inet_pton(AF_INET, argv[3], &remote_addr.sin_addr.s_addr);
-               memcpy(&remote_addr.sw_hash, argv[4], sizeof(struct sw_hash));
+               memcpy(&remote_addr.sw_hash, argv[2], sizeof(struct sw_hash));
                bytes_sent = sw_sendto(sockfd, buffer, BUFSIZ, 0, (struct sockaddr *) &remote_addr, sizeof(remote_addr));
                DIE(bytes_sent < 0, "sw_sendto");
        }