initial commit

client.c

@@ -0,0 +1,85 @@
+/*
+    This file is part of udpxd.
+
+    Copyright (C) 2015 T.v.Dein.
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+    You can contact me by mail: <tom AT vondein DOT org>.
+*/
+
+#include "client.h"
+
+void client_del(client_t *client) {
+  HASH_DEL(clients, client);
+}
+
+void client_add(client_t *client) {
+  HASH_ADD_INT(clients, socket, client);
+}
+
+client_t *client_find_fd(int fd) {
+  client_t *client = NULL;
+  HASH_FIND_INT(clients, &fd, client);
+  return client; /*  maybe NULL! */
+}
+
+client_t *client_find_src(struct sockaddr_in *src) {
+  client_t *current = NULL;
+  client_iter(clients, current) {
+    if (current->src == src)
+      return current;
+  }
+  return NULL;
+}
+
+void client_seen(client_t *client) {
+  client->lastseen = (long)time(0);
+}
+
+client_t *client_new(int fd, struct sockaddr_in *src, struct sockaddr_in *dst) {
+  client_t *client = malloc(sizeof(client_t));
+  client->socket = fd;
+  client->src = src;
+  client->dst = dst;
+  client_seen(client);
+  return client;
+}
+
+void client_close(client_t *client) {
+  if(VERBOSE) {
+    char *srcip  = inet_ntoa(client->src->sin_addr);
+    char *bindip = inet_ntoa(client->dst->sin_addr);
+    fprintf(stderr, "closing socket %s:%d for client %s:%d (aged out)\n",
+	    srcip, ntohs(client->src->sin_port), bindip, ntohs(client->dst->sin_port));
+  }
+  client_del(client);
+  close(client->socket);
+  free(client->src);
+  free(client->dst);
+  free(client);
+}
+
+void client_clean() {
+  uint32_t now = (long)time(0);
+  uint32_t diff;
+  client_t *current;
+  client_iter(clients, current) {
+    diff = now - current->lastseen;
+    if(diff >= MAXAGE) {
+      client_close(current);
+    }
+  }
+}
+