mirror of
https://github.com/lxsang/antd-tunnel-publishers
synced 2025-08-31 00:01:58 +02:00
add generic purpose FIFO service to the tunnel
This commit is contained in:
lxsang
11
wfifo/Makefile.am
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11
wfifo/Makefile.am
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AUTOMAKE_OPTIONS = foreign
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AM_CPPFLAGS = -W -Wall -g -std=c99
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# bin
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bin_PROGRAMS = wfifo
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# source files
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wfifo_SOURCES = wfifo.c ../tunnel.c
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# antd_LDADD = libantd.la
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BIN
wfifo/wfifo
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BIN
wfifo/wfifo
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Binary file not shown.
252
wfifo/wfifo.c
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252
wfifo/wfifo.c
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@@ -0,0 +1,252 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <signal.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/select.h>
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#include <sys/ioctl.h>
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#include <sys/wait.h>
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#include <antd/list.h>
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#include <antd/bst.h>
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#include "../tunnel.h"
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#define MODULE_NAME "wfifo"
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static bst_node_t* clients = NULL;
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static volatile int running = 1;
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static void int_handler(int dummy) {
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(void) dummy;
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running = 0;
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}
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static void send_data(bst_node_t* node, void** argv, int argc)
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{
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(void)argc;
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tunnel_msg_t* msg = (tunnel_msg_t*) argv[0];
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int *fd = (int*) argv[1];
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msg->header.client_id = node->key;
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if(msg_write(*fd, msg) == -1)
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{
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M_ERROR(MODULE_NAME, "Unable to write data message to client %d", node->key);
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}
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}
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static void unsubscribe(bst_node_t* node, void** args, int argc)
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{
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(void) argc;
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tunnel_msg_t msg;
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int* ufd = (int*) args[0];
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msg.header.type = CHANNEL_UNSUBSCRIBE;
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msg.header.client_id = node->key;
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msg.header.size = 0;
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if(msg_write(*ufd, &msg) == -1)
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{
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M_ERROR(MODULE_NAME, "Unable to request unsubscribe to client %d", node->key);
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}
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}
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int main(int argc, char** argv)
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{
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int fd, fifo_fd;
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tunnel_msg_t msg;
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fd_set fd_in;
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int status, maxfd;
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struct timeval timeout;
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char buff[BUFFLEN+1];
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void* fargv[2];
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uint8_t* tmp;
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LOG_INIT(MODULE_NAME);
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if(argc != 5)
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{
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printf("Usage: %s path/to/hotline/socket channel_name input_file\n", argv[0]);
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return -1;
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}
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signal(SIGPIPE, SIG_IGN);
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signal(SIGABRT, SIG_IGN);
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signal(SIGINT, int_handler);
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// create the fifo first
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(void) unlink(argv[3]);
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if(mkfifo(argv[3], 0666) == -1)
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{
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M_ERROR(MODULE_NAME, "Unable to create FIFO %s: %s", argv[3], strerror(errno));
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return -1;
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}
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fifo_fd = open(argv[3], O_RDWR);
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if(fifo_fd == -1)
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{
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M_ERROR(MODULE_NAME, "Unable to open FIFO %s: %s", argv[3], strerror(errno));
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return -1;
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}
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M_LOG(MODULE_NAME, "FIFO: %s created", argv[3]);
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M_LOG(MODULE_NAME, "Hotline is: %s", argv[1]);
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// now try to request new channel from hotline
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fd = open_unix_socket(argv[1]);
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if(fd == -1)
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{
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M_ERROR(MODULE_NAME, "Unable to open the hotline: %s", argv[1]);
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(void) close(fifo_fd);
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return -1;
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}
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msg.header.type = CHANNEL_OPEN;
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msg.header.channel_id = 0;
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msg.header.client_id = 0;
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M_LOG(MODULE_NAME, "Request to open the channel %s", argv[2]);
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(void)strncpy(buff, argv[2],MAX_CHANNEL_NAME);
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msg.header.size = strlen(buff);
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msg.data = (uint8_t*) buff;
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if(msg_write(fd, &msg) == -1)
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{
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M_ERROR(MODULE_NAME, "Unable to write message to hotline");
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(void) close(fd);
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(void) close(fifo_fd);
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return -1;
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}
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M_LOG(MODULE_NAME, "Wait for comfirm creation of %s", argv[2]);
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// now wait for message
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if(msg_read(fd, &msg) == -1)
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{
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M_ERROR(MODULE_NAME, "Unable to read message from hotline");
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(void) close(fd);
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(void) close(fifo_fd);
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return -1;
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}
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if(msg.header.type == CHANNEL_OK)
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{
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M_LOG(MODULE_NAME, "Channel created: %s", argv[2]);
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if(msg.data)
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free(msg.data);
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}
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// now read data
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while(running)
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{
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timeout.tv_sec = 0;
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timeout.tv_usec = 500;
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FD_ZERO(&fd_in);
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FD_SET(fd, &fd_in);
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FD_SET(fifo_fd, &fd_in);
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maxfd = fd > fifo_fd? fd: fifo_fd;
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status = select(maxfd + 1, &fd_in, NULL, NULL, &timeout);
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switch (status)
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{
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case -1:
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M_LOG(MODULE_NAME, "Error %d on select()\n", errno);
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running = 0;
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break;
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case 0:
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timeout.tv_sec = 0;
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timeout.tv_usec = 10000; // 5 ms
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select(0, NULL, NULL, NULL, &timeout);
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break;
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// we have data
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default:
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if (FD_ISSET(fd, &fd_in))
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{
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if(msg_read(fd, &msg) == -1)
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{
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M_ERROR(MODULE_NAME, "Unable to read message from channel. quit");
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running = 0;
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}
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else
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{
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switch (msg.header.type)
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{
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case CHANNEL_SUBSCRIBE:
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M_LOG(MODULE_NAME, "Client %d subscribes to the chanel", msg.header.client_id);
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clients = bst_insert(clients,msg.header.client_id, NULL);
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break;
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case CHANNEL_UNSUBSCRIBE:
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M_LOG(MODULE_NAME, "Client %d unsubscribes to the chanel", msg.header.client_id);
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clients = bst_delete(clients,msg.header.client_id);
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break;
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case CHANNEL_DATA:
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if(argv[4][0] == 'w')
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{
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// write data to the FIFO
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if(msg.header.size >0)
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{
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if( write(fifo_fd, msg.data, msg.header.size) == -1)
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{
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M_ERROR(MODULE_NAME, "Unable to write data to the FIFO %s from client %d: %s", argv[3], msg.header.client_id, strerror(errno));
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running = 0;
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}
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}
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}
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else
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{
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(void)snprintf(buff, BUFFLEN, "Channel is read only");
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msg.header.type = CHANNEL_ERROR;
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msg.header.size = strlen(buff);
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tmp = msg.data;
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msg.data = buff;
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if(msg_write(fd, &msg) == -1)
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{
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M_ERROR(MODULE_NAME, "Unable to write message to hotline");
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running = 0;
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}
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msg.data = tmp;
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M_ERROR(MODULE_NAME, "Channel is read only %s(%d)", argv[3], msg.header.client_id);
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}
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break;
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default:
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M_LOG(MODULE_NAME, "Client %d send message of type %d",
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msg.header.client_id, msg.header.type);
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break;
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}
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if(msg.data)
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{
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free(msg.data);
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}
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}
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}
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else if(FD_ISSET(fifo_fd, &fd_in) && argv[4][0] == 'r')
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{
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// on the fifo side
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if((status = read(fifo_fd,buff, BUFFLEN)) == -1)
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{
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M_ERROR(MODULE_NAME, "Unable to read data from the FIFO %s: %s", argv[3], strerror(errno));
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running = 0;
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}
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else
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{
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msg.header.type = CHANNEL_DATA;
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msg.header.size = status;
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msg.data = buff;
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fargv[0] = (void*) &msg;
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fargv[1] = (void*) &fd;
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bst_for_each(clients, send_data, fargv, 2);
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}
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}
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}
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}
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// unsubscribe all client
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fargv[0] = (void*) &fd;
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bst_for_each(clients, unsubscribe, fargv, 1);
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// close the channel
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M_LOG(MODULE_NAME, "Close the channel %s (%d)", argv[2], fd);
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msg.header.type = CHANNEL_CLOSE;
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msg.header.size = 0;
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msg.data = NULL;
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if( msg_write(fd, &msg) == -1)
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{
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M_ERROR(MODULE_NAME, "Unable to request channel close");
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}
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// close all opened terminal
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(void)msg_read(fd, &msg);
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(void) close(fd);
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(void) close(fifo_fd);
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return 0;
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}
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