116 lines
2.8 KiB
C
116 lines
2.8 KiB
C
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#include <unistd.h>
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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 <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <sys/types.h>
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#if defined(__OpenBSD__)
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# include <sys/select.h>
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#endif
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int main(int argc, char **argv) {
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int port;
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int node;
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char *script;
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pid_t pid;
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int server_socket;
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int on = 1;
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struct sockaddr_in server, client;
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int client_fd;
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int c;
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fd_set master, read_fds;
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int len;
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char inbuf[256];
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int i;
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char *arguments[4];
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if (argc < 4) {
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fprintf(stderr, "Usage ./dosbox_shim [port] [node] [script]\n");
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exit(-1);
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}
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port = atoi(argv[1]);
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node = atoi(argv[2]);
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script = strdup(argv[3]);
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pid = fork();
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if (pid < 0) {
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fprintf(stderr, "Error forking!\n");
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exit(-1);
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} else if (pid == 0) {
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arguments[0] = strdup(script);
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sprintf(inbuf, "%d", port);
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arguments[1] = strdup(inbuf);
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sprintf(inbuf, "%d", node);
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arguments[2] = strdup(inbuf);
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arguments[3] = NULL;
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execvp(script, arguments);
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} else {
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server_socket = socket(AF_INET, SOCK_STREAM, 0);
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if (server_socket == -1) {
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fprintf(stderr, "Couldn't create socket.\n");
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exit(-1);
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}
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if (setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) {
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fprintf(stderr, "setsockopt(SO_REUSEADDR) failed");
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exit(1);
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}
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server.sin_family = AF_INET;
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server.sin_addr.s_addr = INADDR_ANY;
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server.sin_port = htons(port);
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c = sizeof(struct sockaddr_in);
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if (bind(server_socket, (struct sockaddr *)&server, sizeof(server)) < 0) {
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perror("Bind Failed, Error\n");
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exit(-1);
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}
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listen(server_socket, 1);
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client_fd = accept(server_socket, (struct sockaddr *)&client, (socklen_t *)&c);
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if (client_fd == -1) {
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perror("accept");
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exit(-1);
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}
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FD_ZERO(&master);
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FD_SET(STDIN_FILENO, &master);
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FD_SET(client_fd, &master);
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while(1) {
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read_fds = master;
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if (select(client_fd + 1, &read_fds, NULL, NULL, NULL) == -1) {
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perror("select");
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exit(-1);
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}
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if (FD_ISSET(STDIN_FILENO, &read_fds)) {
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len = read(STDIN_FILENO, inbuf, 256);
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for (i=0;i<len;i++) {
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write(client_fd, &inbuf[i], 1);
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}
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}
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if (FD_ISSET(client_fd, &read_fds)) {
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len = read(client_fd, inbuf, 256);
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if (len == 0) {
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close(client_fd);
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exit(0);
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}
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for (i=0;i<len;i++) {
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write(STDOUT_FILENO, &inbuf[i], 1);
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}
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}
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}
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}
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}
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