X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=jam.c;h=f6c30075a19c451f71abf7ffb35b770bd97cf637;hb=979533580fbe20fa5d553af1168097f440802a6f;hp=b4f8ad37e4e7d3e014471cf4b53c7ab37ee1d7c6;hpb=729c2889c5ce1163ae768690c2c8b5290b799338;p=jam

diff --git a/jam.c b/jam.c
index b4f8ad3..f6c3007 100644
--- a/jam.c
+++ b/jam.c
@@ -1,10 +1,110 @@
 #include <stdio.h>
+#include <string.h>
 #include <stdlib.h>
+#include <getopt.h>
+#include <netdb.h>
 #include <unistd.h>
 #include <pthread.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 
+unsigned short port = 2007;
+
+struct in_addr *destinations = NULL;
+unsigned num_destinations = 0;
+unsigned room_destinations = 0;
+
+struct in_addr *sources = NULL;
+unsigned num_sources = 0;
+unsigned room_sources = 0;
+
+const static struct option longopts[] = {
+	{ "source-file", required_argument, NULL, 's' },
+	{ "destination-file", required_argument, NULL, 'd' },
+	{ "port", required_argument, NULL, 'p' },
+	{ NULL, 0, NULL, 0 }
+};
+
+void read_ip_list(char *filename, struct in_addr **addr_list, unsigned *num, unsigned *room)
+{
+	char buf[256];
+	FILE *in = fopen(filename, "r");
+	if (in == NULL) {
+		perror(filename);
+		exit(1);
+	}
+
+	for ( ;; ) {
+		char *ptr;
+		struct in_addr addr;
+		struct hostent *he;
+
+		if (fgets(buf, 256, in) == NULL)
+			break;
+
+		ptr = strchr(buf, '\n');
+		if (ptr != NULL)
+			*ptr = 0;
+
+		ptr = strchr(buf, '\r');
+		if (ptr != NULL)
+			*ptr = 0;
+		
+		ptr = buf + strspn(buf, " \t");
+
+		if (ptr[0] == '#' || ptr[0] == 0)
+			continue;
+
+		he = gethostbyname(ptr);
+		if (he == NULL) {
+			perror(ptr);
+			exit(1);
+		}
+
+		// just pick the first for now
+		memcpy(&addr.s_addr, he->h_addr_list[0], sizeof(addr.s_addr));
+
+		if (*num >= *room) {
+			if (*room == 0) {
+				*room = 16;
+			} else {
+				*room <<= 1;
+			}
+			*addr_list = (struct in_addr *)realloc(*addr_list, *room * sizeof(struct in_addr));
+		}
+
+		(*addr_list)[*num] = addr;
+		++*num;
+	}
+
+	fclose(in);
+}
+
+void parse_options(int argc, char **argv)
+{
+	int option_index = 0;
+
+	for ( ;; ) {
+		int c = getopt_long(argc, argv, "s:d:p:", longopts, &option_index); 
+		switch (c) {
+		case 's':
+			read_ip_list(optarg, &sources, &num_sources, &room_sources);
+			break;
+		case 'd':
+			read_ip_list(optarg, &destinations, &num_destinations, &room_destinations);
+			break;
+		case 'p':
+			port = atoi(optarg);
+			break;
+		case -1:
+			return;       // end of argument list
+		default:
+			fprintf(stderr, "Invalid option\n");
+			exit(1);
+		}
+	}
+}
+
 void *receiver_worker(void *arg)
 {
 	int sock = (int)arg;
@@ -34,6 +134,7 @@ int get_server_socket(unsigned short port)
 {
 	int server_sock;
 	struct sockaddr_in sin;
+	unsigned one = 1;
 
 	server_sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
 	if (server_sock == -1) {
@@ -41,6 +142,11 @@ int get_server_socket(unsigned short port)
 		exit(1);
 	}
 
+	if (setsockopt(server_sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) == -1) {
+		perror("setsocket(SO_REUSEADDR)");
+		exit(1);
+	}
+
 	sin.sin_family = AF_INET;
 	sin.sin_port = htons(port);
 	sin.sin_addr.s_addr = INADDR_ANY;
@@ -58,9 +164,17 @@ int get_server_socket(unsigned short port)
 	return server_sock;
 }
 
-int main()
+int main(int argc, char **argv)
 {
-	int server_sock = get_server_socket(2007);
+	int server_sock;
+
+	parse_options(argc, argv);
+
+	if (destinations == NULL || sources == NULL) {
+		fprintf(stderr, "Missing or empty source or destination host list. Aborting.\n");
+	}
+
+	server_sock = get_server_socket(port);
 
 	// FIXME: fire off sender workers here
 
@@ -73,6 +187,7 @@ int main()
 		struct sockaddr_in addr;
 		socklen_t addr_len = sizeof(addr);
 		pthread_t thread;
+		pthread_attr_t attr;
 
 		int sock = accept(server_sock, (struct sockaddr *)&addr, &addr_len);
 		if (sock == -1) {
@@ -80,7 +195,21 @@ int main()
 			exit(1);
 		}
 
-		pthread_create(&thread, NULL, receiver_worker, (void *)sock);
+		// FIXME: these do not really set errno
+		if (pthread_attr_init(&attr) != 0) {
+			perror("pthread_attr_init()");
+			exit(1);
+		}
+
+		if (pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN + 65536 + 0x4000) != 0) {
+			perror("pthread_attr_setstacksize");
+			exit(1);
+		}
+
+		if (pthread_create(&thread, &attr, receiver_worker, (void *)sock) != 0) {
+			perror("pthread_create()");
+			exit(1);
+		}
 	}
 
 	exit(0);