add fully functional multiplayer (jk)

check time since last commit, yes it took this long

uttt.c

@@ -5,6 +5,11 @@
 #include <string.h>
 #include <curses.h>
 #include <signal.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <errno.h>
 
 struct ut_state
 {
@@ -20,6 +25,8 @@ const struct ut_state ut_initial = {
 		.player = 'X'
 	};
 
+const char *arg_host = "--host";
+const char *arg_join = "--join";
 
 char ut_turn(char player)
 {
@@ -173,26 +180,21 @@ void finish(int sig)
 	exit(0);
 }
 
-int main(int *argc, char **argv) {
-	signal(SIGINT, finish);
-	/*initscr();
-	keypad(stdscr, TRUE);*/
-
-	struct ut_state state = ut_initial;
+void ut_local_game(struct ut_state *state) {
 	while (true) {
 		int x, y;
-		ut_show(&state);
+		ut_show(state);
 		for (int j = 0; j < 3; j++) {
 			for (int i = 0; i < 3; i++) {
-				putchar(state.boards[j][i]);
+				putchar(state->boards[j][i]);
 			}
 			putchar('\n');
 		}
-		bool ok = getpos(&state, &y, &x);
+		bool ok = getpos(state, &y, &x);
 		if (!ok) {continue;}
-		int err = ut_move(&state, &state, x, y);
+		int err = ut_move(state, state, x, y);
 		if (err) {continue;}
-		char w = ut_winner((char *)state.boards, 0, 3);
+		char w = ut_winner((char *)state->boards, 0, 3);
 		if(w)
 		{
 			if(w == ' ')
@@ -203,8 +205,41 @@ int main(int *argc, char **argv) {
 			{
 				printf("\n%c wins!\n", (int)w);
 			}
-			return 0;
 		}
 	}
+}
+
+void ut_host_game(struct ut_state *state, int sock) {
+	printf(":P\n");
+}
+
+int main(int argc, char **argv) {
+	signal(SIGINT, finish);
+	struct ut_state state = ut_initial;
+	if (argc < 2) {
+		ut_local_game(&state);
+	} else if (strncmp(argv[1], arg_host, strlen(arg_host)) == 0) {
+		int sock = socket(AF_INET, SOCK_STREAM, 0);
+		if (sock == -1) {
+			int errsv = errno;
+			printf("error %d\n", errsv);
+			return 1;
+		}
+		const struct sockaddr_in addr = {
+			.sin_family = AF_INET,
+			.sin_port = htons(6669),
+			.sin_addr = { .s_addr = htonl(0x7f000001) },
+		};
+		if (bind(sock, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
+			int errsv = errno;
+			printf("error %d\n", errsv);
+			return 1;
+		}
+		ut_host_game(&state, sock);
+	} else if (strncmp(argv[1], arg_join, strlen(arg_join)) == 0) {
+		printf("no ;)\n");
+	} else {
+		printf("%s\n", argv[1]);
+	}
 	return 0;
 }