| /**************************************************************************** |
| * apps/examples/poll/net_listener.c |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The |
| * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <nuttx/config.h> |
| |
| #include <sys/stat.h> |
| #include <sys/select.h> |
| #include <sys/socket.h> |
| #include <sys/ioctl.h> |
| #include <sys/time.h> |
| |
| #include <stdint.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <pthread.h> |
| #include <errno.h> |
| #include <debug.h> |
| |
| #include <net/if.h> |
| #include <arpa/inet.h> |
| #include <netinet/in.h> |
| |
| #include "netutils/netlib.h" |
| |
| #include "poll_internal.h" |
| |
| /**************************************************************************** |
| * Pre-processor Definitions |
| ****************************************************************************/ |
| |
| #define IOBUFFER_SIZE 80 |
| |
| /**************************************************************************** |
| * Private Types |
| ****************************************************************************/ |
| |
| struct net_listener_s |
| { |
| struct sockaddr_in addr; |
| fd_set master; |
| fd_set working; |
| char buffer[IOBUFFER_SIZE]; |
| int listensd; |
| int mxsd; |
| }; |
| |
| /**************************************************************************** |
| * Private Data |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Private Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Name: net_closeclient |
| ****************************************************************************/ |
| |
| static bool net_closeclient(struct net_listener_s *nls, int sd) |
| { |
| printf("net_listener: Closing host side connection sd=%d\n", sd); |
| close(sd); |
| FD_CLR(sd, &nls->master); |
| |
| /* If we just closed the max SD, then search downward for the next |
| * biggest SD. |
| */ |
| |
| while (FD_ISSET(nls->mxsd, &nls->master) == false) |
| { |
| nls->mxsd -= 1; |
| } |
| |
| return true; |
| } |
| |
| /**************************************************************************** |
| * Name: net_incomingdata |
| ****************************************************************************/ |
| |
| static inline bool net_incomingdata(struct net_listener_s *nls, int sd) |
| { |
| char *ptr; |
| int nbytes; |
| int ret; |
| |
| /* Read data from the socket */ |
| |
| #ifdef FIONBIO |
| for (; ; ) |
| #endif |
| { |
| printf("net_listener: Read data from sd=%d\n", sd); |
| ret = recv(sd, nls->buffer, IOBUFFER_SIZE, 0); |
| if (ret < 0) |
| { |
| if (errno != EINTR) |
| { |
| printf("net_listener: recv failed sd=%d: %d\n", sd, errno); |
| if (errno != EAGAIN) |
| { |
| net_closeclient(nls, sd); |
| return false; |
| } |
| } |
| } |
| else if (ret == 0) |
| { |
| printf("net_listener: Client connection lost sd=%d\n", sd); |
| net_closeclient(nls, sd); |
| return false; |
| } |
| else |
| { |
| nls->buffer[ret] = '\0'; |
| printf("poll_listener: Read '%s' (%d bytes)\n", nls->buffer, ret); |
| |
| /* Echo the data back to the client */ |
| |
| for (nbytes = ret, ptr = nls->buffer; nbytes > 0; ) |
| { |
| ret = send(sd, ptr, nbytes, 0); |
| if (ret < 0) |
| { |
| if (errno != EINTR) |
| { |
| printf("net_listener: Send failed sd=%d: %d\n", |
| sd, errno); |
| net_closeclient(nls, sd); |
| return false; |
| } |
| } |
| else |
| { |
| nbytes -= ret; |
| ptr += ret; |
| } |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| /**************************************************************************** |
| * Name: net_connection |
| ****************************************************************************/ |
| |
| static inline bool net_connection(struct net_listener_s *nls) |
| { |
| int sd; |
| |
| /* Loop until all connections have been processed */ |
| |
| #ifdef FIONBIO |
| for (; ; ) |
| #endif |
| { |
| printf("net_listener: Accepting new connection on sd=%d\n", |
| nls->listensd); |
| |
| sd = accept(nls->listensd, NULL, NULL); |
| if (sd < 0) |
| { |
| printf("net_listener: accept failed: %d\n", errno); |
| |
| if (errno != EINTR) |
| { |
| return false; |
| } |
| } |
| else |
| { |
| /* Add the new connection to the master set */ |
| |
| printf("net_listener: Connection accepted for sd=%d\n", sd); |
| |
| FD_SET(sd, &nls->master); |
| if (sd > nls->mxsd) |
| { |
| nls->mxsd = sd; |
| } |
| |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| /**************************************************************************** |
| * Name: net_mksocket |
| ****************************************************************************/ |
| |
| static inline bool net_mksocket(struct net_listener_s *nls) |
| { |
| int value; |
| int ret; |
| |
| /* Create a listening socket */ |
| |
| printf("net_listener: Initializing listener socket\n"); |
| nls->listensd = socket(AF_INET, SOCK_STREAM, 0); |
| if (nls->listensd < 0) |
| { |
| printf("net_listener: socket failed: %d\n", errno); |
| return false; |
| } |
| |
| /* Configure the socket */ |
| |
| value = 1; |
| ret = setsockopt(nls->listensd, SOL_SOCKET, SO_REUSEADDR, |
| (char *)&value, sizeof(int)); |
| if (ret < 0) |
| { |
| printf("net_listener: setsockopt failed: %d\n", errno); |
| close(nls->listensd); |
| return false; |
| } |
| |
| /* Set the socket to non-blocking */ |
| |
| #ifdef FIONBIO |
| ret = ioctl(nls->listensd, FIONBIO, (char *)&value); |
| if (ret < 0) |
| { |
| printf("net_listener: ioctl failed: %d\n", errno); |
| close(nls->listensd); |
| return false; |
| } |
| #endif |
| |
| /* Bind the socket */ |
| |
| memset(&nls->addr, 0, sizeof(struct sockaddr_in)); |
| nls->addr.sin_family = AF_INET; |
| nls->addr.sin_addr.s_addr = htonl(INADDR_ANY); |
| nls->addr.sin_port = htons(LISTENER_PORT); |
| ret = bind(nls->listensd, (struct sockaddr *)&nls->addr, |
| sizeof(struct sockaddr_in)); |
| if (ret < 0) |
| { |
| printf("net_listener: bind failed: %d\n", errno); |
| close(nls->listensd); |
| return false; |
| } |
| |
| /* Mark the socket as a listener */ |
| |
| ret = listen(nls->listensd, 32); |
| if (ret < 0) |
| { |
| printf("net_listener: bind failed: %d\n", errno); |
| close(nls->listensd); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /**************************************************************************** |
| * Name: net_configure |
| ****************************************************************************/ |
| |
| static void net_configure(void) |
| { |
| struct in_addr addr; |
| #if defined(CONFIG_EXAMPLES_POLL_NOMAC) |
| uint8_t mac[IFHWADDRLEN]; |
| #endif |
| |
| /* Configure the network |
| * Many embedded network interfaces must have a software assigned MAC |
| */ |
| |
| #ifdef CONFIG_EXAMPLES_POLL_NOMAC |
| mac[0] = 0x00; |
| mac[1] = 0xe0; |
| mac[2] = 0xde; |
| mac[3] = 0xad; |
| mac[4] = 0xbe; |
| mac[5] = 0xef; |
| netlib_setmacaddr("eth0", mac); |
| #endif |
| |
| /* Set up our host address */ |
| |
| addr.s_addr = HTONL(CONFIG_EXAMPLES_POLL_IPADDR); |
| netlib_set_ipv4addr("eth0", &addr); |
| |
| /* Set up the default router address */ |
| |
| addr.s_addr = HTONL(CONFIG_EXAMPLES_POLL_DRIPADDR); |
| netlib_set_dripv4addr("eth0", &addr); |
| |
| /* Setup the subnet mask */ |
| |
| addr.s_addr = HTONL(CONFIG_EXAMPLES_POLL_NETMASK); |
| netlib_set_ipv4netmask("eth0", &addr); |
| |
| /* New versions of netlib_set_ipvXaddr will not bring the network up, |
| * So ensure the network is really up at this point. |
| */ |
| |
| netlib_ifup("eth0"); |
| } |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Name: net_listener |
| ****************************************************************************/ |
| |
| void *net_listener(pthread_addr_t pvarg) |
| { |
| struct net_listener_s nls; |
| struct timeval timeout; |
| int nsds; |
| int ret; |
| int i; |
| |
| /* Configure the network */ |
| |
| net_configure(); |
| |
| /* Set up a listening socket */ |
| |
| memset(&nls, 0, sizeof(struct net_listener_s)); |
| if (!net_mksocket(&nls)) |
| { |
| return (void *)(uintptr_t)1; |
| } |
| |
| /* Initialize the 'master' file descriptor set */ |
| |
| FD_ZERO(&nls.master); |
| nls.mxsd = nls.listensd; |
| FD_SET(nls.listensd, &nls.master); |
| |
| /* Set up a 3 second timeout */ |
| |
| timeout.tv_sec = NET_LISTENER_DELAY; |
| timeout.tv_usec = 0; |
| |
| /* Loop waiting for incoming connections or for incoming data |
| * on any of the connect sockets. |
| */ |
| |
| for (; ; ) |
| { |
| /* Wait on select */ |
| |
| printf("net_listener: Calling select(), listener sd=%d\n", |
| nls.listensd); |
| memcpy(&nls.working, &nls.master, sizeof(fd_set)); |
| ret = select(nls.mxsd + 1, &nls.working, NULL, NULL, &timeout); |
| if (ret < 0) |
| { |
| printf("net_listener: select failed: %d\n", errno); |
| break; |
| } |
| |
| /* Check for timeout */ |
| |
| if (ret == 0) |
| { |
| printf("net_listener: Timeout\n"); |
| continue; |
| } |
| |
| /* Find which descriptors caused the wakeup */ |
| |
| nsds = ret; |
| for (i = 0; i <= nls.mxsd && nsds > 0; i++) |
| { |
| /* Is this descriptor ready? */ |
| |
| if (FD_ISSET(i, &nls.working)) |
| { |
| /* Yes, is it our listener? */ |
| |
| printf("net_listener: Activity on sd=%d\n", i); |
| |
| nsds--; |
| if (i == nls.listensd) |
| { |
| net_connection(&nls); |
| } |
| else |
| { |
| net_incomingdata(&nls, i); |
| } |
| } |
| } |
| } |
| |
| /* Cleanup */ |
| |
| #if 0 /* Don't get here */ |
| for (i = 0; i <= nls.mxsd; +i++) |
| { |
| if (FD_ISSET(i, &nls.master)) |
| { |
| close(i); |
| } |
| } |
| #endif |
| |
| return NULL; /* Keeps some compilers from complaining */ |
| } |