[TESTS] add a simple program to test connection resets

The "reset" program may be used to send strings then reset connections.

diff --git a/tests/reset.c b/tests/reset.c
new file mode 100644 (file)
index 0000000..ec09b94
--- /dev/null
+++ b/tests/reset.c
@@ -0,0 +1,45 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <fcntl.h>
+
+int main(int argc, char **argv) {
+       char *addr;
+       int port;
+       int sock;
+       struct sockaddr_in saddr;
+       const struct linger nolinger = { .l_onoff = 1, .l_linger = 0 };
+
+       if (argc < 4) {
+               fprintf(stderr,
+                       "usage : %s <addr> <port> <string>\n"
+                       "        This will connect to TCP port <addr>:<port> and send string <string>\n"
+                       "        then immediately reset.\n",
+                       argv[0]);
+               exit(1);
+       }
+
+       addr = argv[1];
+       port = atoi(argv[2]);
+
+       sock = socket(AF_INET, SOCK_STREAM, 0);
+       bzero(&saddr, sizeof(saddr));
+       saddr.sin_addr.s_addr = inet_addr(addr);
+       saddr.sin_port = htons(port);
+       saddr.sin_family = AF_INET;
+
+       if (connect(sock, (struct sockaddr *)&saddr, sizeof(saddr)) < 0) {
+               perror("connect");
+               exit(1);
+       }
+
+       send(sock, argv[3], strlen(argv[3]), MSG_DONTWAIT | MSG_NOSIGNAL);
+       setsockopt(sock, SOL_SOCKET, SO_LINGER, (struct linger *) &nolinger, sizeof(struct linger));
+       close(sock);
+       exit(0);
+}