From: Michael Gernoth Date: Sat, 8 Jun 2013 21:15:31 +0000 (+0200) Subject: add option to bind socket to specified interface (e.g. localhost) only X-Git-Tag: v0.100~84 X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/hmcfgusb/commitdiff_plain/4a8a2269f615db1d1e98e2214fea8c93bca4f7a5 add option to bind socket to specified interface (e.g. localhost) only --- diff --git a/hmland.c b/hmland.c index 24fa34e..c3981ab 100644 --- a/hmland.c +++ b/hmland.c @@ -379,7 +379,7 @@ static int comm(int fd_in, int fd_out, int master_socket) return 1; } -static int socket_server(int port, int daemon) +static int socket_server(char *iface, int port, int daemon) { struct sigaction sact; struct sockaddr_in sin; @@ -423,7 +423,14 @@ static int socket_server(int port, int daemon) memset(&sin, 0, sizeof(sin)); sin.sin_family = AF_INET; sin.sin_port = htons(port); - sin.sin_addr.s_addr = htonl(INADDR_ANY); + if (!iface) { + sin.sin_addr.s_addr = htonl(INADDR_ANY); + } else { + if (inet_pton(AF_INET, iface, &(sin.sin_addr.s_addr)) != 1) { + perror("inet_ntop"); + return EXIT_FAILURE; + } + } if (bind(sock, (struct sockaddr*)&sin, sizeof(sin)) == -1) { perror("Can't bind socket"); @@ -494,6 +501,7 @@ void hmlan_syntax(char *prog) fprintf(stderr, "\t-d\tdaemon mode\n"); fprintf(stderr, "\t-h\tthis help\n"); fprintf(stderr, "\t-i\tinteractive mode (connect HM-CFG-USB to terminal)\n"); + fprintf(stderr, "\t-l ip\tlisten on given IP address only (for example 127.0.0.1)\n"); fprintf(stderr, "\t-p n\tlisten on port n (default 1000)\n"); fprintf(stderr, "\t-v\tverbose mode\n"); @@ -502,12 +510,13 @@ void hmlan_syntax(char *prog) int main(int argc, char **argv) { int port = 1000; + char *iface = NULL; int interactive = 0; int daemon = 0; char *ep; int opt; - while((opt = getopt(argc, argv, "Ddhip:v")) != -1) { + while((opt = getopt(argc, argv, "Ddhip:l:v")) != -1) { switch (opt) { case 'D': debug = 1; @@ -526,6 +535,9 @@ int main(int argc, char **argv) exit(EXIT_FAILURE); } break; + case 'l': + iface = optarg; + break; case 'v': verbose = 1; break; @@ -542,6 +554,6 @@ int main(int argc, char **argv) if (interactive) { return interactive_server(); } else { - return socket_server(port, daemon); + return socket_server(iface, port, daemon); } }