Add CMake config

[dragonnet.git] / dragonnet / listen.c

diff --git a/dragonnet/listen.c b/dragonnet/listen.c
new file mode 100644 (file)
index 0000000..a42066f
--- /dev/null
+++ b/dragonnet/listen.c
@@ -0,0 +1,144 @@
+#define _GNU_SOURCE
+#include <assert.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "addr.h"
+#include "listen.h"
+#include "recv.h"
+#include "sock.h"
+
+// ----
+// Peer
+// ----
+
+static bool dragonnet_peer_init_accepted(DragonnetPeer *p, int sock,
+               char *addr, DragonnetListener *l)
+{
+       pthread_mutex_init(&p->mtx, NULL);
+
+       p->sock = sock;
+       p->address = addr;
+       p->on_disconnect = l->on_disconnect;
+       p->on_recv = l->on_recv;
+       p->on_recv_type = l->on_recv_type;
+
+       return true;
+}
+
+static DragonnetPeer *dragonnet_peer_accept(int sock, char *addr,
+               DragonnetListener *l)
+{
+       DragonnetPeer *p = malloc(sizeof *p);
+       if (!dragonnet_peer_init_accepted(p, sock, addr, l)) {
+               pthread_mutex_destroy(&p->mtx);
+               free(p);
+               free(addr);
+               return NULL;
+       }
+
+       return p;
+}
+
+// --------
+// Listener
+// --------
+
+DragonnetListener *dragonnet_listener_new(char *addr)
+{
+       struct addrinfo *info = dragonnet_str2addr(addr);
+       if (!info)
+               return NULL;
+
+       DragonnetListener *l = malloc(sizeof *l);
+
+       l->active = true;
+       l->sock = socket(info->ai_family, info->ai_socktype, info->ai_protocol);
+       l->address = dragonnet_addr2str(info->ai_addr, info->ai_addrlen);
+       l->on_connect = NULL;
+       l->on_disconnect = NULL;
+       l->on_recv = NULL;
+       l->on_recv_type = calloc(sizeof *l->on_recv_type, dragonnet_num_types);
+
+       int so_reuseaddr = 1;
+       if (setsockopt(l->sock, SOL_SOCKET, SO_REUSEADDR, (void *) &so_reuseaddr,
+                       sizeof so_reuseaddr) < 0) {
+               perror("setsockopt");
+               freeaddrinfo(info);
+               dragonnet_listener_delete(l);
+               return NULL;
+       }
+
+       if (bind(l->sock, info->ai_addr, info->ai_addrlen) < 0) {
+               perror("bind");
+               freeaddrinfo(info);
+               dragonnet_listener_delete(l);
+               return NULL;
+       }
+
+       freeaddrinfo(info);
+
+       if (listen(l->sock, 10) < 0) {
+               perror("listen");
+               dragonnet_listener_delete(l);
+               return NULL;
+       }
+
+       return l;
+}
+
+static void *listener_main(void *g_listener)
+{
+#ifdef __GLIBC__
+       pthread_setname_np(pthread_self(), "listen");
+#endif
+
+       DragonnetListener *l = (DragonnetListener *) g_listener;
+
+       while (l->active) {
+               struct sockaddr_storage clt_addr;
+               socklen_t clt_addrlen = sizeof clt_addr;
+
+               int clt_sock = accept(l->sock, (struct sockaddr *) &clt_addr, &clt_addrlen);
+               if (clt_sock < 0) {
+                       if (errno != EINTR)
+                               perror("accept");
+                       continue;
+               }
+
+               char *clt_addstr =  dragonnet_addr2str((struct sockaddr *) &clt_addr, clt_addrlen);
+               DragonnetPeer *p = dragonnet_peer_accept(clt_sock, clt_addstr, l);
+               if (p == NULL)
+                       continue;
+
+               void (*on_connect)(DragonnetPeer *) = l->on_connect;
+
+               if (on_connect != NULL)
+                       on_connect(p);
+
+               dragonnet_peer_run(p);
+       }
+
+       return NULL;
+}
+
+void dragonnet_listener_run(DragonnetListener *l)
+{
+       pthread_create(&l->accept_thread, NULL, &listener_main, l);
+}
+
+void dragonnet_listener_close(DragonnetListener *l)
+{
+       l->active = false;
+
+       pthread_kill(l->accept_thread, SIGINT);
+       pthread_join(l->accept_thread, NULL);
+}
+
+void dragonnet_listener_delete(DragonnetListener *l)
+{
+       free(l->on_recv_type);
+       free(l->address);
+       free(l);
+}