153 lines
2.8 KiB
C
153 lines
2.8 KiB
C
/* $Id$ */
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/* gcc -O2 -g -pedantic -Wall fgfsclient.c -o fgfsclient */
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/* USAGE: ./fgfsclient [hostname [port]] */
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/* Public Domain */
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#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <stdarg.h>
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#include <string.h>
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#define DFLTHOST "localhost"
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#define DFLTPORT 5501
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#define MAXMSG 256
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#define fgfsclose close
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void init_sockaddr(struct sockaddr_in *name, const char *hostname, unsigned port);
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int fgfswrite(int sock, char *msg, ...);
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const char *fgfsread(int sock, int wait);
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void fgfsflush(int sock);
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int fgfswrite(int sock, char *msg, ...)
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{
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va_list va;
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ssize_t len;
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char buf[MAXMSG];
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va_start(va, msg);
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vsnprintf(buf, MAXMSG - 2, msg, va);
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va_end(va);
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printf("SEND: \t<%s>\n", buf);
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strcat(buf, "\015\012");
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len = write(sock, buf, strlen(buf));
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if (len < 0) {
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perror("fgfswrite");
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exit(EXIT_FAILURE);
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}
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return len;
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}
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const char *fgfsread(int sock, int timeout)
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{
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static char buf[MAXMSG];
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char *p;
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fd_set ready;
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struct timeval tv;
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ssize_t len;
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FD_ZERO(&ready);
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FD_SET(sock, &ready);
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tv.tv_sec = timeout;
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tv.tv_usec = 0;
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if (!select(32, &ready, 0, 0, &tv))
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return NULL;
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len = read(sock, buf, MAXMSG - 1);
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if (len < 0) {
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perror("fgfsread");
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exit(EXIT_FAILURE);
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}
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if (len == 0)
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return NULL;
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for (p = &buf[len - 1]; p >= buf; p--)
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if (*p != '\015' && *p != '\012')
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break;
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*++p = '\0';
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return strlen(buf) ? buf : NULL;
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}
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void fgfsflush(int sock)
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{
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const char *p;
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while ((p = fgfsread(sock, 0)) != NULL) {
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printf("IGNORE: \t<%s>\n", p);
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}
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}
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int fgfsconnect(const char *hostname, const int port)
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{
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struct sockaddr_in serv_addr;
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struct hostent *hostinfo;
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int sock;
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sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (sock < 0) {
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perror("fgfsconnect/socket");
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return -1;
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}
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hostinfo = gethostbyname(hostname);
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if (hostinfo == NULL) {
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fprintf(stderr, "fgfsconnect: unknown host: \"%s\"\n", hostname);
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close(sock);
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return -2;
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}
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serv_addr.sin_family = AF_INET;
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serv_addr.sin_port = htons(port);
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serv_addr.sin_addr = *(struct in_addr *)hostinfo->h_addr;
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if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
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perror("fgfsconnect/connect");
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close(sock);
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return -3;
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}
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return sock;
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}
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int main(int argc, char **argv)
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{
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int sock;
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unsigned port;
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const char *hostname, *p;
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hostname = argc > 1 ? argv[1] : DFLTHOST;
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port = argc > 2 ? atoi(argv[2]) : DFLTPORT;
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sock = fgfsconnect(hostname, port);
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if (sock < 0)
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return EXIT_FAILURE;
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fgfswrite(sock, "data");
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fgfswrite(sock, "set /controls/engines/engine[%d]/throttle %d", 0, 1);
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fgfswrite(sock, "get /sim/aircraft");
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p = fgfsread(sock, 3);
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if (p != NULL)
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printf("READ: \t<%s>\n", p);
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fgfswrite(sock, "quit");
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fgfsclose(sock);
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return EXIT_SUCCESS;
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}
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