[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
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);
+}