Author: rwatson
Date: Mon May 30 09:04:35 2011
New Revision: 222484
URL: http://svn.freebsd.org/changeset/base/222484
Log:
In the tcpdrop regression test, allow the kernel to allocate us a port
rather than using a fixed port number. This means that the regression test
can be run many times in a row without waiting on TIMEWAIT to release a
hard-coded port number.
MFC after: 3 days
Sponsored by: Juniper Networks, Inc.
Modified:
head/tools/regression/netinet/tcpdrop/tcpdrop.c
Modified: head/tools/regression/netinet/tcpdrop/tcpdrop.c
==============================================================================
--- head/tools/regression/netinet/tcpdrop/tcpdrop.c Mon May 30 08:54:32
2011 (r222483)
+++ head/tools/regression/netinet/tcpdrop/tcpdrop.c Mon May 30 09:04:35
2011 (r222484)
@@ -1,7 +1,11 @@
/*-
* Copyright (c) 2006 Robert N. M. Watson
+ * Copyright (c) 2011 Juniper Networks, Inc.
* All rights reserved.
*
+ * Portions of this software were developed by Robert N. M. Watson under
+ * contract to Juniper Networks, Inc.
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
@@ -46,8 +50,6 @@
#include <string.h>
#include <unistd.h>
-#define TCP_PORT 9001
-
static int
tcp_drop(struct sockaddr_in *sin_local, struct sockaddr_in *sin_remote)
{
@@ -66,41 +68,12 @@ tcp_drop(struct sockaddr_in *sin_local,
}
static void
-tcp_server(pid_t partner)
+tcp_server(pid_t partner, int listen_fd)
{
- int error, listen_fd, accept_fd;
- struct sockaddr_in sin;
+ int error, accept_fd;
ssize_t len;
char ch;
- listen_fd = socket(PF_INET, SOCK_STREAM, 0);
- if (listen_fd < 0) {
- error = errno;
- (void)kill(partner, SIGTERM);
- errno = error;
- err(-1, "tcp_server: socket");
- }
-
- bzero(&sin, sizeof(sin));
- sin.sin_family = AF_INET;
- sin.sin_len = sizeof(sin);
- sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
- sin.sin_port = htons(TCP_PORT);
-
- if (bind(listen_fd, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
- error = errno;
- (void)kill(partner, SIGTERM);
- errno = error;
- err(-1, "tcp_server: bind");
- }
-
- if (listen(listen_fd, -1) < 0) {
- error = errno;
- (void)kill(partner, SIGTERM);
- errno = error;
- err(-1, "tcp_server: listen");
- }
-
accept_fd = accept(listen_fd, NULL, NULL);
if (accept_fd < 0) {
error = errno;
@@ -146,7 +119,7 @@ tcp_server(pid_t partner)
}
static void
-tcp_client(pid_t partner)
+tcp_client(pid_t partner, u_short port)
{
struct sockaddr_in sin, sin_local;
int error, sock;
@@ -168,7 +141,7 @@ tcp_client(pid_t partner)
sin.sin_family = AF_INET;
sin.sin_len = sizeof(sin);
sin.sin_addr.s_addr = ntohl(INADDR_LOOPBACK);
- sin.sin_port = htons(TCP_PORT);
+ sin.sin_port = port;
if (connect(sock, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
error = errno;
@@ -230,6 +203,40 @@ int
main(int argc, char *argv[])
{
pid_t child_pid, parent_pid;
+ struct sockaddr_in sin;
+ int listen_fd;
+ u_short port;
+ socklen_t len;
+
+ listen_fd = socket(PF_INET, SOCK_STREAM, 0);
+ if (listen_fd < 0)
+ err(-1, "socket");
+
+ /*
+ * We use the loopback, but let the kernel select a port for the
+ * server socket.
+ */
+ bzero(&sin, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin.sin_len = sizeof(sin);
+ sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+
+ if (bind(listen_fd, (struct sockaddr *)&sin, sizeof(sin)) < 0)
+ err(-1, "bind");
+
+ if (listen(listen_fd, -1) < 0)
+ err(-1, "listen");
+
+ /*
+ * Query the port so that the client can use it.
+ */
+ bzero(&sin, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin.sin_len = sizeof(sin);
+ if (getsockname(listen_fd, (struct sockaddr *)&sin, &len) < 0)
+ err(-1, "getsockname");
+ port = sin.sin_port;
+ printf("Using port %d\n", ntohs(port));
if (signal(SIGCHLD, SIG_IGN) == SIG_ERR)
err(-1, "signal");
@@ -240,9 +247,9 @@ main(int argc, char *argv[])
err(-1, "fork");
if (child_pid == 0) {
child_pid = getpid();
- tcp_server(parent_pid);
+ tcp_server(parent_pid, listen_fd);
} else
- tcp_client(child_pid);
+ tcp_client(child_pid, port);
return (0);
}
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