initial commit

yay start of a state machine and also learning sockets

1 files changed, 84 insertions, 0 deletions

diff --git a/src/server.c b/src/server.c
new file mode 100644
index 0000000..bee6153
--- /dev/null
+++ b/src/server.c
@@ -0,0 +1,84 @@
+#include "server.h"
+#include "login.h"
+#include <netinet/in.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int server_listen(server_t *server) {
+  /*
+  **
+  ** The `socket(2)` syscall returns a file descriptor for a socket
+  **
+  ** it takes two arguments that we care about:
+  ** - domain -- AF_INET for IPv4
+  ** - type -- SOCK_STREAM sequenced and reliable
+  **
+  */
+  int err = (server->listen_fd = socket(AF_INET, SOCK_STREAM, 0));
+
+  if (err == -1) {
+    perror("socket");
+    printf("Failed to create socket");
+    return err;
+  }
+
+  struct sockaddr_in server_addr = {0};
+
+  server_addr.sin_family = AF_INET;
+  server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+  server_addr.sin_port = htons(8000);
+
+  err = bind(server->listen_fd, (struct sockaddr *)&server_addr,
+             sizeof(server_addr));
+  if (err == -1) {
+    perror("bind");
+    printf("Failed to bind socket\n");
+    return err;
+  }
+
+  err = listen(server->listen_fd, 100);
+  if (err == -1) {
+    perror("listen");
+    printf("Failed to listen on socket\n");
+    return err;
+  }
+
+  return 0;
+}
+
+int server_accept(server_t *server) {
+  int err = 0;
+  int conn_fd;
+  socklen_t client_len;
+
+  struct sockaddr_in client_addr;
+
+  client_len = sizeof(client_addr);
+
+  for (;;) {
+    err = (conn_fd = accept(server->listen_fd, (struct sockaddr *)&client_addr,
+                            &client_len));
+    if (err == -1) {
+      perror("Accept");
+      printf("failed accepting connection\n");
+      return err;
+    }
+
+    if (!fork()) {
+      handle_player(conn_fd);
+    }
+  }
+
+  return err;
+}
+
+int send_to_fd(int fd, char *msg) {
+  int err = 0;
+
+  err = send(fd, msg, strlen(msg), 0);
+
+  return err;
+}