X-Git-Url: http://git.droids-corp.org/?p=libcmdline.git;a=blobdiff_plain;f=src%2Fcalculator_server%2Fmain.c;h=d3c5e05c9e904c83120e24626d11bd04734561cb;hp=0406a06fe88e066591c8ab37ec081248f69f4d9d;hb=f95c37e3cf4d9ed5cb4ad1899e80d19fca888118;hpb=42d8264dd0ef02b7764c0cce18231eafc1062257

diff --git a/src/calculator_server/main.c b/src/calculator_server/main.c
index 0406a06..d3c5e05 100644
--- a/src/calculator_server/main.c
+++ b/src/calculator_server/main.c
@@ -29,15 +29,15 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdint.h>
-#include <math.h>
 #include <stdlib.h>
 #include <stdarg.h>
 #include <inttypes.h>
 #include <ctype.h>
-#include <ctype.h>
 #include <unistd.h>
-#include <termios.h>
 #include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <getopt.h>
 
 #include <cmdline_rdline.h>
 #include <cmdline_parse.h>
@@ -46,15 +46,124 @@
 
 extern cmdline_parse_ctx_t main_ctx[];
 
-struct cmdline *cl;
+static struct sockaddr addr;
+static uint16_t port = 1234;
+
+static void
+usage(const char *prgname)
+{
+	printf("%s [-a ADDRESS] [-p PORT]\n"
+	       "\n"
+	       "Start a command line server on a TCP listen socket. Only\n"
+	       "one connection is accepted, then the program exits.\n"
+	       "The default behaviour is to listen on 0.0.0.0:1234\n"
+	       "\n"
+	       "  -a ADDR:  IPv4 or IPv6 local address to listen on (default\n"
+	       "            is 0.0.0.0).\n"
+	       "  -p PORT:  port to listen on (default is 1234).\n",
+	       prgname);
+}
+
+/* Parse the argument given in the command line of the application */
+static int
+parse_args(int argc, char **argv)
+{
+	int opt, ret;
+	char **argvopt;
+	int option_index;
+	char *prgname = argv[0];
+	char *end = NULL;
+	static struct option lgopts[] = {
+		{0, 0, 0, 0}
+	};
+
+	argvopt = argv;
+
+	while ((opt = getopt_long(argc, argvopt, "a:p:",
+				  lgopts, &option_index)) != EOF) {
+
+		switch (opt) {
+
+		case 'a':
+			if (strchr(optarg, '.') != NULL) {
+				struct sockaddr_in *sin =
+					(struct sockaddr_in *)&addr;
+				addr.sa_family = AF_INET;
+				ret = inet_pton(AF_INET, optarg,
+						&sin->sin_addr);
+			}
+			else {
+				struct sockaddr_in6 *sin6 =
+					(struct sockaddr_in6 *)&addr;
+				addr.sa_family = AF_INET6;
+				ret = inet_pton(AF_INET6, optarg,
+						&sin6->sin6_addr);
+			}
+
+			if (ret != 1) {
+				printf("Bad address\n");
+				usage(prgname);
+				return -1;
+			}
+			break;
 
-int main(void)
+		case 'p':
+			port = strtoul(optarg, &end, 0);
+			if ((optarg[0] == '\0') ||
+			    (end == NULL) ||
+			    (*end != '\0')) {
+				printf("Invalid port\n");
+				usage(prgname);
+				return -1;
+			}
+
+			break;
+
+		/* long options */
+		case 0:
+			/* if (!strcmp(lgopts[option_index].name, "option")) */
+			break;
+
+		default:
+			usage(prgname);
+			return -1;
+		}
+	}
+
+	if (argc != optind) {
+		printf("Invalid argument\n");
+		usage(prgname);
+		return -1;
+	}
+
+	ret = optind-1;
+
+	return ret;
+}
+
+int main(int argc, char **argv)
 {
+	struct sockaddr_in *sin = (struct sockaddr_in *)&addr;
+	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&addr;
+	struct cmdline *cl;
 	int s;
-	s = cmdline_tcpv4_listen(INADDR_ANY, 1234);
+
+	if (parse_args(argc, argv) < 0)
+		exit(1);
+
+	printf("Listening on port %d\n", port);
+
+	/* open a tcp server on specified port */
+	if (addr.sa_family == AF_INET)
+		s = cmdline_tcpv4_listen(sin->sin_addr.s_addr, port);
+	else
+		s = cmdline_tcpv6_listen(sin6->sin6_addr, port);
+
 	cl = cmdline_accept(main_ctx, "example> ", s);
-	if (cl == NULL)
+	if (cl == NULL) {
+		printf("accept() failed\n");
 		return 1;
+	}
 	cmdline_interact(cl);
 	cmdline_free(cl);
 	return 0;