mirror of
https://github.com/lxsang/antd-tunnel-publishers
synced 2024-07-01 13:59:47 +02:00
256 lines
7.9 KiB
C
256 lines
7.9 KiB
C
#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 <sys/types.h>
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#include <sys/stat.h>
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#include <antd/list.h>
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#include <antd/bst.h>
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#include <antd/utils.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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{
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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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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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else
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{
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M_ERROR(MODULE_NAME, "Channel is not created: %s. Tunnel service responds with msg of type %d", argv[2], msg.header.type);
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if (msg.data)
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free(msg.data);
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running = 0;
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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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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, NULL);
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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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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 = (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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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 = (uint8_t *)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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} |