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nuttx-apps/examples/bridge/bridge_main.c
Gregory Nutt be61a5d297 apps/examples/bridge: Add host-side test driver
2014-11-21 08:20:25 -06:00

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/****************************************************************************
* examples/bridge/bridge_main.c
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
*
* Authors: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sched.h>
#include <errno.h>
#include <debug.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <nuttx/net/arp.h>
#include <apps/netutils/netlib.h>
#if defined(CONFIG_EXAMPLES_BRIDGE_NET1_DHCPC) || \
defined(CONFIG_EXAMPLES_BRIDGE_NET2_DHCPC)
# include <arpa/inet.h>
# include <apps/netutils/dnsclient.h>
# include <apps/netutils/dhcpc.h>
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static in_addr_t g_net1_ipaddr;
static in_addr_t g_net2_ipaddr;
static uint8_t g_net1_buffer[CONFIG_EXAMPLES_BRIDGE_NET1_IOBUFIZE];
static uint8_t g_net2_buffer[CONFIG_EXAMPLES_BRIDGE_NET2_IOBUFIZE];
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: briget_net1_setup
****************************************************************************/
static int briget_net1_setup(void)
{
/* If this task is executed as an NSH built-in function, then the
* network has already been configured by NSH's start-up logic.
*/
#ifndef CONFIG_NSH_BUILTIN_APPS
struct in_addr addr;
#if defined(CONFIG_EXAMPLES_BRIDGE_NET1_DHCPC) || \
defined(CONFIG_EXAMPLES_BRIDGE_NET1_NOMAC)
uint8_t mac[IFHWADDRLEN];
#endif
#ifdef CONFIG_EXAMPLES_BRIDGE_NET1_DHCPC
struct dhcpc_state ds;
void *handle;
#endif
printf("NET1: Configuring %s\n", CONFIG_EXAMPLES_BRIDGE_NET1_IFNAME);
/* Many embedded network interfaces must have a software assigned MAC */
#ifdef CONFIG_EXAMPLES_BRIDGE_NET1_NOMAC
mac[0] = (CONFIG_EXAMPLES_BRIDGE_NET1_MACADDR >> (8 * 5)) & 0xff;
mac[1] = (CONFIG_EXAMPLES_BRIDGE_NET1_MACADDR >> (8 * 4)) & 0xff;
mac[2] = (CONFIG_EXAMPLES_BRIDGE_NET1_MACADDR >> (8 * 3)) & 0xff;
mac[3] = (CONFIG_EXAMPLES_BRIDGE_NET1_MACADDR >> (8 * 2)) & 0xff;
mac[4] = (CONFIG_EXAMPLES_BRIDGE_NET1_MACADDR >> (8 * 1)) & 0xff;
mac[5] = (CONFIG_EXAMPLES_BRIDGE_NET1_MACADDR >> (8 * 0)) & 0xff;
netlib_setmacaddr(CONFIG_EXAMPLES_BRIDGE_NET1_IFNAME, mac);
#endif
/* Set up our host address */
#ifdef CONFIG_EXAMPLES_BRIDGE_NET1_DHCPC
addr.s_addr = 0;
#else
addr.s_addr = HTONL(CONFIG_EXAMPLES_BRIDGE_NET1_IPADDR);
#endif
netlib_sethostaddr(CONFIG_EXAMPLES_BRIDGE_NET1_IFNAME, &addr);
/* Set up the default router address */
addr.s_addr = HTONL(CONFIG_EXAMPLES_BRIDGE_NET1_DRIPADDR);
netlib_setdraddr(CONFIG_EXAMPLES_BRIDGE_NET1_IFNAME, &addr);
/* Setup the subnet mask */
addr.s_addr = HTONL(CONFIG_EXAMPLES_BRIDGE_NET1_NETMASK);
netlib_setnetmask(CONFIG_EXAMPLES_BRIDGE_NET1_IFNAME, &addr);
#ifdef CONFIG_EXAMPLES_BRIDGE_NET1_DHCPC
/* Set up the resolver */
dns_bind();
/* Get the MAC address of the NIC */
netlib_getmacaddr(CONFIG_EXAMPLES_BRIDGE_NET1_IFNAME, mac);
/* Set up the DHCPC modules */
handle = dhcpc_open(&mac, IFHWADDRLEN);
/* Get an IP address. Note: there is no logic here for renewing the address in this
* example. The address should be renewed in ds.lease_time/2 seconds.
*/
if (!handle)
{
fprintf(stderr, "NET1 ERROR: dhcpc_open failed\n");
return ERROR;
}
if (dhcpc_request(handle, &ds) != OK)
{
fprintf(stderr, "NET1 ERROR: dhcpc_request failed\n");
return ERROR;
}
netlib_sethostaddr(CONFIG_EXAMPLES_BRIDGE_NET1_IFNAME, &ds.ipaddr);
if (ds.netmask.s_addr != 0)
{
netlib_setnetmask(CONFIG_EXAMPLES_BRIDGE_NET1_IFNAME, &ds.netmask);
}
if (ds.default_router.s_addr != 0)
{
netlib_setdraddr(CONFIG_EXAMPLES_BRIDGE_NET1_IFNAME, &ds.default_router);
}
if (ds.dnsaddr.s_addr != 0)
{
dns_setserver(&ds.dnsaddr);
}
dhcpc_close(handle);
printf("NET1: Assigned IP: %s\n", inet_ntoa(ds.ipaddr));
/* Save the IP address in network order */
g_net1_ipaddr = ds.ipaddr;
#else
/* Save the IP address in network order */
g_net1_ipaddr = HTONL(CONFIG_EXAMPLES_BRIDGE_NET1_IPADDR);
#endif /* CONFIG_EXAMPLES_BRIDGE_NET1_DHCPC */
#else /* CONFIG_NSH_BUILTIN_APPS */
/* Hmmm.. there is an issue here. Where do we get the IP address if we
* are a builtin in application?
*/
# warning Missing logic
#endif /* CONFIG_NSH_BUILTIN_APPS */
return OK;
}
/****************************************************************************
* Name: briget_net2_setup
****************************************************************************/
static int briget_net2_setup(void)
{
/* If this task is executed as an NSH built-in function, then the
* network has already been configured by NSH's start-up logic.
*/
#ifndef CONFIG_NSH_BUILTIN_APPS
struct in_addr addr;
#if defined(CONFIG_EXAMPLES_BRIDGE_NET2_DHCPC) || \
defined(CONFIG_EXAMPLES_BRIDGE_NET2_NOMAC)
uint8_t mac[IFHWADDRLEN];
#endif
#ifdef CONFIG_EXAMPLES_BRIDGE_NET2_DHCPC
struct dhcpc_state ds;
void *handle;
#endif
printf("NET2: Configuring %s\n", CONFIG_EXAMPLES_BRIDGE_NET2_IFNAME);
/* Many embedded network interfaces must have a software assigned MAC */
#ifdef CONFIG_EXAMPLES_BRIDGE_NET2_NOMAC
mac[0] = (CONFIG_EXAMPLES_BRIDGE_NET2_MACADDR >> (8 * 5)) & 0xff;
mac[1] = (CONFIG_EXAMPLES_BRIDGE_NET2_MACADDR >> (8 * 4)) & 0xff;
mac[2] = (CONFIG_EXAMPLES_BRIDGE_NET2_MACADDR >> (8 * 3)) & 0xff;
mac[3] = (CONFIG_EXAMPLES_BRIDGE_NET2_MACADDR >> (8 * 2)) & 0xff;
mac[4] = (CONFIG_EXAMPLES_BRIDGE_NET2_MACADDR >> (8 * 1)) & 0xff;
mac[5] = (CONFIG_EXAMPLES_BRIDGE_NET2_MACADDR >> (8 * 0)) & 0xff;
netlib_setmacaddr(CONFIG_EXAMPLES_BRIDGE_NET2_IFNAME, mac);
#endif
/* Set up our host address */
#ifdef CONFIG_EXAMPLES_BRIDGE_NET2_DHCPC
addr.s_addr = 0;
#else
addr.s_addr = HTONL(CONFIG_EXAMPLES_BRIDGE_NET2_IPADDR);
#endif
netlib_sethostaddr(CONFIG_EXAMPLES_BRIDGE_NET2_IFNAME, &addr);
/* Set up the default router address */
addr.s_addr = HTONL(CONFIG_EXAMPLES_BRIDGE_NET2_DRIPADDR);
netlib_setdraddr(CONFIG_EXAMPLES_BRIDGE_NET2_IFNAME, &addr);
/* Setup the subnet mask */
addr.s_addr = HTONL(CONFIG_EXAMPLES_BRIDGE_NET2_NETMASK);
netlib_setnetmask(CONFIG_EXAMPLES_BRIDGE_NET2_IFNAME, &addr);
#ifdef CONFIG_EXAMPLES_BRIDGE_NET2_DHCPC
/* Set up the resolver */
dns_bind();
/* Get the MAC address of the NIC */
netlib_getmacaddr(CONFIG_EXAMPLES_BRIDGE_NET2_IFNAME, mac);
/* Set up the DHCPC modules */
handle = dhcpc_open(&mac, IFHWADDRLEN);
/* Get an IP address. Note: there is no logic here for renewing the address in this
* example. The address should be renewed in ds.lease_time/2 seconds.
*/
if (!handle)
{
fprintf(stderr, "NET2 ERROR: dhcpc_open failed\n");
return ERROR;
}
if (dhcpc_request(handle, &ds) != OK)
{
fprintf(stderr, "NET2 ERROR: dhcpc_request failed\n");
return ERROR;
}
netlib_sethostaddr(CONFIG_EXAMPLES_BRIDGE_NET2_IFNAME, &ds.ipaddr);
if (ds.netmask.s_addr != 0)
{
netlib_setnetmask(CONFIG_EXAMPLES_BRIDGE_NET2_IFNAME, &ds.netmask);
}
if (ds.default_router.s_addr != 0)
{
netlib_setdraddr(CONFIG_EXAMPLES_BRIDGE_NET2_IFNAME, &ds.default_router);
}
if (ds.dnsaddr.s_addr != 0)
{
dns_setserver(&ds.dnsaddr);
}
dhcpc_close(handle);
printf("NET1: Assigned IP: %s\n", inet_ntoa(ds.ipaddr));
/* Save the IP address in network order */
g_net2_ipaddr = ds.ipaddr;
#else
/* Save the IP address in network order */
g_net2_ipaddr = HTONL(CONFIG_EXAMPLES_BRIDGE_NET2_IPADDR);
#endif /* CONFIG_EXAMPLES_BRIDGE_NET2_DHCPC */
#else /* CONFIG_NSH_BUILTIN_APPS */
/* Hmmm.. there is an issue here. Where do we get the IP address if we
* are a builtin in application?
*/
# warning Missing logic
#endif /* CONFIG_NSH_BUILTIN_APPS */
return OK;
}
/****************************************************************************
* Name: bridge_net1_worker
****************************************************************************/
static int bridge_net1_worker(int argc, char *argv[])
{
struct sockaddr_in recvaddr;
struct sockaddr_in listenaddr;
struct sockaddr_in sendaddr;
socklen_t addrlen;
in_addr_t tmpaddr;
ssize_t nrecvd;
ssize_t nsent;
int optval;
int recvsd;
int sndsd;
printf("NET1: Worker started. PID=%d\n", getpid());
/* Create a UDP receive socket on network 1 */
printf("NET1: Create receive socket\n");
recvsd = socket(PF_INET, SOCK_DGRAM, 0);
if (recvsd < 0)
{
fprintf(stderr, "NET1 ERROR: Failed to create receive socket: %d\n", errno);
return EXIT_FAILURE;
}
/* Set socket to reuse address */
optval = 1;
if (setsockopt(recvsd, SOL_SOCKET, SO_REUSEADDR, (void*)&optval, sizeof(int)) < 0)
{
fprintf(stderr, "NET1 ERROR: setsockopt SO_REUSEADDR failure: %d\n", errno);
goto errout_with_recvsd;
}
/* Bind the socket to a local address */
listenaddr.sin_family = AF_INET;
listenaddr.sin_port = HTONS(CONFIG_EXAMPLES_BRIDGE_NET1_RECVPORT);
listenaddr.sin_addr.s_addr = g_net1_ipaddr;
if (bind(recvsd, (struct sockaddr*)&listenaddr, sizeof(struct sockaddr_in)) < 0)
{
fprintf(stderr, "NET1 ERROR: bind failure: %d\n", errno);
goto errout_with_recvsd;
}
/* Create a UDP send socket on network 2 */
printf("NET1: Create send socket\n");
sndsd = socket(PF_INET, SOCK_DGRAM, 0);
if (sndsd < 0)
{
fprintf(stderr, "NET1 ERROR: Failed to create send socket: %d\n", errno);
goto errout_with_recvsd;
}
/* Set socket to reuse address */
optval = 1;
if (setsockopt(sndsd, SOL_SOCKET, SO_REUSEADDR, (void*)&optval, sizeof(int)) < 0)
{
fprintf(stderr, "NET1 ERROR: setsockopt SO_REUSEADDR failure: %d\n", errno);
goto errout_with_sendsd;
}
/* Bind the socket to a local address */
sendaddr.sin_family = AF_INET;
sendaddr.sin_port = HTONS(CONFIG_EXAMPLES_BRIDGE_NET1_SNDPORT);
sendaddr.sin_addr.s_addr = g_net2_ipaddr;
if (bind(sndsd, (struct sockaddr*)&sendaddr, sizeof(struct sockaddr_in)) < 0)
{
printf("NET1: bind failure: %d\n", errno);
goto errout_with_sendsd;
}
/* Then receive and forward UDP packets forever */
for (;;)
{
/* Read a packet on network 1 */
printf("NET1: Receiving up to %d bytes on network 1\n",
CONFIG_EXAMPLES_BRIDGE_NET1_IOBUFIZE);
addrlen = sizeof(struct sockaddr_in);
nrecvd = recvfrom(recvsd, g_net1_buffer, CONFIG_EXAMPLES_BRIDGE_NET1_IOBUFIZE, 0,
(FAR struct sockaddr*)&recvaddr, &addrlen);
tmpaddr = ntohl(recvaddr.sin_addr.s_addr);
printf("NET1: Received %d bytes from %d.%d.%d.%d:%d\n",
nrecvd,
tmpaddr >> 24, (tmpaddr >> 16) & 0xff,
(tmpaddr >> 8) & 0xff, tmpaddr & 0xff,
ntohs(recvaddr.sin_port));
/* Check for a receive error or zero bytes received. The negative
* return value indicates a receive error; Zero would mean that the
* other side of the "connection" performed an "orderly" shutdown.
* This should not occur with a UDP socket and so must also be an
* error of some kind.
*/
if (nrecvd <= 0)
{
if (nrecvd < 0)
{
fprintf(stderr, "NET1 ERROR: recvfrom failed: %d\n", errno);
}
else
{
fprintf(stderr, "NET1 ERROR: recvfrom returned zero\n");
}
goto errout_with_sendsd;
}
/* Send the newly received packet out network 2 */
printf("NET1: Sending %d bytes on network 2\n", nrecvd);
nsent = sendto(sndsd, g_net1_buffer, nrecvd, 0,
(struct sockaddr*)&sendaddr, sizeof(struct sockaddr_in));
/* Check for send errors */
if (nsent < 0)
{
fprintf(stderr, "NET1 ERROR: sendto failed: %d\n", errno);
goto errout_with_sendsd;
}
else if (nsent != nrecvd)
{
fprintf(stderr, "NET1 ERROR: Bad send length: %d Expected: %d\n",
nsent, nrecvd);
goto errout_with_sendsd;
}
}
close(recvsd);
close(recvsd);
return EXIT_SUCCESS;
errout_with_sendsd:
close(sndsd);
errout_with_recvsd:
close(recvsd);
return EXIT_FAILURE;
}
/****************************************************************************
* Name: bridge_net2_worker
****************************************************************************/
static int bridge_net2_worker(int argc, char *argv[])
{
struct sockaddr_in recvaddr;
struct sockaddr_in listenaddr;
struct sockaddr_in sendaddr;
socklen_t addrlen;
in_addr_t tmpaddr;
ssize_t nrecvd;
ssize_t nsent;
int optval;
int recvsd;
int sndsd;
printf("NET2: Worker started. PID=%d\n", getpid());
/* Create a UDP receive socket on network 2 */
printf("NET2: Create receive socket\n");
recvsd = socket(PF_INET, SOCK_DGRAM, 0);
if (recvsd < 0)
{
fprintf(stderr, "NET2 ERROR: Failed to create receive socket: %d\n", errno);
return EXIT_FAILURE;
}
/* Set socket to reuse address */
optval = 1;
if (setsockopt(recvsd, SOL_SOCKET, SO_REUSEADDR, (void*)&optval, sizeof(int)) < 0)
{
fprintf(stderr, "NET2 ERROR: setsockopt SO_REUSEADDR failure: %d\n", errno);
goto errout_with_recvsd;
}
/* Bind the socket to a local address */
listenaddr.sin_family = AF_INET;
listenaddr.sin_port = HTONS(CONFIG_EXAMPLES_BRIDGE_NET2_RECVPORT);
listenaddr.sin_addr.s_addr = g_net2_ipaddr;
if (bind(recvsd, (struct sockaddr*)&listenaddr, sizeof(struct sockaddr_in)) < 0)
{
fprintf(stderr, "NET2 ERROR: bind failure: %d\n", errno);
goto errout_with_recvsd;
}
/* Create a UDP send socket on network 1 */
printf("NET2: Create send socket\n");
sndsd = socket(PF_INET, SOCK_DGRAM, 0);
if (sndsd < 0)
{
fprintf(stderr, "NET2 ERROR: Failed to create send socket: %d\n", errno);
goto errout_with_recvsd;
}
/* Set socket to reuse address */
optval = 1;
if (setsockopt(sndsd, SOL_SOCKET, SO_REUSEADDR, (void*)&optval, sizeof(int)) < 0)
{
fprintf(stderr, "NET2 ERROR: setsockopt SO_REUSEADDR failure: %d\n", errno);
goto errout_with_sendsd;
}
/* Bind the socket to a local address */
sendaddr.sin_family = AF_INET;
sendaddr.sin_port = HTONS(CONFIG_EXAMPLES_BRIDGE_NET2_SNDPORT);
sendaddr.sin_addr.s_addr = g_net1_ipaddr;
if (bind(sndsd, (struct sockaddr*)&sendaddr, sizeof(struct sockaddr_in)) < 0)
{
printf("NET2: bind failure: %d\n", errno);
goto errout_with_sendsd;
}
/* Then receive and forward UDP packets forever */
for (;;)
{
/* Read a packet on network 2 */
printf("NET2: Receiving up to %d bytes on network 2\n",
CONFIG_EXAMPLES_BRIDGE_NET2_IOBUFIZE);
addrlen = sizeof(struct sockaddr_in);
nrecvd = recvfrom(recvsd, g_net2_buffer, CONFIG_EXAMPLES_BRIDGE_NET2_IOBUFIZE, 0,
(FAR struct sockaddr*)&recvaddr, &addrlen);
tmpaddr = ntohl(recvaddr.sin_addr.s_addr);
printf("NET2: Received %d bytes from %d.%d.%d.%d:%d\n",
nrecvd,
tmpaddr >> 24, (tmpaddr >> 16) & 0xff,
(tmpaddr >> 8) & 0xff, tmpaddr & 0xff,
ntohs(recvaddr.sin_port));
/* Check for a receive error or zero bytes received. The negative
* return value indicates a receive error; Zero would mean that the
* other side of the "connection" performed an "orderly" shutdown.
* This should not occur with a UDP socket and so must also be an
* error of some kind.
*/
if (nrecvd <= 0)
{
if (nrecvd < 0)
{
fprintf(stderr, "NET2 ERROR: recvfrom failed: %d\n", errno);
}
else
{
fprintf(stderr, "NET2 ERROR: recvfrom returned zero\n");
}
goto errout_with_sendsd;
}
/* Send the newly received packet out network 1 */
printf("NET2: Sending %d bytes on network 1\n", nrecvd);
nsent = sendto(sndsd, g_net2_buffer, nrecvd, 0,
(struct sockaddr*)&sendaddr, sizeof(struct sockaddr_in));
/* Check for send errors */
if (nsent < 0)
{
fprintf(stderr, "NET2 ERROR: sendto failed: %d\n", errno);
goto errout_with_sendsd;
}
else if (nsent != nrecvd)
{
fprintf(stderr, "NET2 ERROR: Bad send length: %d Expected: %d\n",
nsent, nrecvd);
goto errout_with_sendsd;
}
}
close(recvsd);
close(recvsd);
return EXIT_SUCCESS;
errout_with_sendsd:
close(sndsd);
errout_with_recvsd:
close(recvsd);
return EXIT_FAILURE;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* bridge_main
****************************************************************************/
#ifdef CONFIG_BUILD_KERNEL
int main(int argc, FAR char *argv[])
#else
int bridge_main(int argc, char *argv[])
#endif
{
pid_t net1_worker;
pid_t net2_worker;
int ret;
/* Initialize networks */
ret = briget_net1_setup();
if (ret != OK)
{
fprintf(stderr, "ERROR: Failed to setup network 1\n");
return EXIT_FAILURE;
}
ret = briget_net2_setup();
if (ret != OK)
{
fprintf(stderr, "ERROR: Failed to setup network 2\n");
return EXIT_FAILURE;
}
/* Start network daemons */
printf("Start network 1 worker\n");
net1_worker = task_create("NET1 Worker", CONFIG_EXAMPLES_BRIDGE_NET1_PRIORITY,
CONFIG_EXAMPLES_BRIDGE_NET1_STACKSIZE, bridge_net1_worker,
NULL);
if (net1_worker < 0)
{
fprintf(stderr, "ERROR: Failed to start network daemon 1\n");
return EXIT_FAILURE;
}
printf("Start network 2 worker\n");
net2_worker = task_create("NET2 Worker", CONFIG_EXAMPLES_BRIDGE_NET2_PRIORITY,
CONFIG_EXAMPLES_BRIDGE_NET2_STACKSIZE, bridge_net2_worker,
NULL);
if (net2_worker < 0)
{
fprintf(stderr, "ERROR: Failed to start network daemon 2\n");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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