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include/patty/ax25/macros.h

@@ -50,7 +50,7 @@
     (((c & 0xe0) == 0x20) && ((c & 0x0f) == 0x0f))
 
 #define PATTY_AX25_CONTROL_UNNUMBERED_DISC(c) \
-    (((c & 0xe0) == 0x20) && ((c & 0x0f) == 0x03))
+    (((c & 0xe0) == 0x40) && ((c & 0x0f) == 0x03))
 
 #define PATTY_AX25_CONTROL_UNNUMBERED_DM(c) \
     (((c & 0xe0) == 0x00) && ((c & 0x0f) == 0x0f))

src/server.c

@@ -117,6 +117,28 @@ static int destroy_if(patty_ax25_if *iface, void *ctx) {
     return 0;
 }
 
+static inline void watch_fd(patty_ax25_server *server, int fd) {
+    FD_SET(fd, &server->fds_watch);
+
+    if (server->fd_max <= fd) {
+        server->fd_max  = fd + 1;
+    }
+}
+
+static inline void clear_fd(patty_ax25_server *server, int fd) {
+    int i;
+
+    FD_CLR(fd, &server->fds_watch);
+
+    for (i=0; i<8*sizeof(&server->fds_watch); i++) {
+        if (FD_ISSET(i, &server->fds_watch)) {
+            server->fd_max = i;
+        }
+    }
+
+    server->fd_max++;
+}
+
 static patty_ax25_sock *sock_by_fd(patty_dict *dict,
                                    int fd) {
     return patty_dict_get_with_hash(dict, (uint32_t)fd);
@@ -161,15 +183,33 @@ error_dict_set:
     return -1;
 }
 
-static int sock_save_by_addr(patty_dict *dict,
+static inline uint32_t hash_addr(patty_ax25_addr *addr) {
-                             patty_ax25_sock *sock,
-                             patty_ax25_addr *addr) {
     uint32_t hash;
 
     patty_hash_init(&hash);
     patty_ax25_addr_hash(&hash, addr);
     patty_hash_end(&hash);
 
+    return hash;
+}
+
+static inline uint32_t hash_addrpair(patty_ax25_addr *local,
+                                     patty_ax25_addr *remote) {
+    uint32_t hash;
+
+    patty_hash_init(&hash);
+    patty_ax25_addr_hash(&hash, local);
+    patty_ax25_addr_hash(&hash, remote);
+    patty_hash_end(&hash);
+
+    return hash;
+}
+
+static int sock_save_by_addr(patty_dict *dict,
+                             patty_ax25_sock *sock,
+                             patty_ax25_addr *addr) {
+    uint32_t hash = hash_addr(addr);
+
     if (patty_dict_set_with_hash(dict,
                                  addr,
                                  sizeof(*addr),
@@ -188,12 +228,7 @@ static int sock_save_by_addrpair(patty_dict *dict,
                                  patty_ax25_sock *sock,
                                  patty_ax25_addr *local,
                                  patty_ax25_addr *remote) {
-    uint32_t hash;
+    uint32_t hash = hash_addrpair(local, remote);
-
-    patty_hash_init(&hash);
-    patty_ax25_addr_hash(&hash, local);
-    patty_ax25_addr_hash(&hash, remote);
-    patty_hash_end(&hash);
 
     if (patty_dict_set_with_hash(dict,
                                 sock,
@@ -209,67 +244,9 @@ error_dict_set_with_hash:
     return -1;
 }
 
-static int sock_delete(patty_ax25_server *server,
-                       patty_ax25_sock *sock) {
-    if (sock->status == PATTY_AX25_SOCK_ESTABLISHED) {
-        uint32_t hash;
-
-        patty_hash_init(&hash);
-        patty_ax25_addr_hash(&hash, &sock->local);
-        patty_ax25_addr_hash(&hash, &sock->remote);
-        patty_hash_end(&hash);
-
-        if (patty_dict_delete_with_hash(server->socks_established, hash) < 0) {
-            goto error_dict_delete_established;
-        }
-    }
-
-    if (sock->status == PATTY_AX25_SOCK_PENDING_CONNECT) {
-        uint32_t hash;
-
-        patty_hash_init(&hash);
-        patty_ax25_addr_hash(&hash, &sock->local);
-        patty_hash_end(&hash);
-
-        if (patty_dict_delete_with_hash(server->socks_pending_connect, hash) < 0) {
-            goto error_dict_delete_pending_connect;
-        }
-    }
-
-    if (sock->status == PATTY_AX25_SOCK_PENDING_ACCEPT) {
-        uint32_t hash;
-
-        patty_hash_init(&hash);
-        patty_ax25_addr_hash(&hash, &sock->local);
-        patty_hash_end(&hash);
-
-        if (patty_dict_delete_with_hash(server->socks_pending_accept, hash) < 0) {
-            goto error_dict_delete_pending_accept;
-        }
-    }
-
-    if (patty_dict_delete_with_hash(server->socks_by_fd, sock->fd) < 0) {
-        goto error_dict_delete_by_fd;
-    }
-
-    free(sock);
-
-    return 0;
-
-error_dict_delete_by_fd:
-error_dict_delete_pending_accept:
-error_dict_delete_pending_connect:
-error_dict_delete_established:
-    return -1;
-}
-
 static int sock_delete_by_addr(patty_dict *dict,
                                patty_ax25_addr *addr) {
-    uint32_t hash;
+    uint32_t hash = hash_addr(addr);
-
-    patty_hash_init(&hash);
-    patty_ax25_addr_hash(&hash, addr);
-    patty_hash_end(&hash);
 
     return patty_dict_delete_with_hash(dict, hash);
 }
@@ -277,38 +254,59 @@ static int sock_delete_by_addr(patty_dict *dict,
 static int sock_delete_by_addrpair(patty_dict *dict,
                                    patty_ax25_addr *local,
                                    patty_ax25_addr *remote) {
-    uint32_t hash;
+    uint32_t hash = hash_addrpair(local, remote);
-
-    patty_hash_init(&hash);
-    patty_ax25_addr_hash(&hash, local);
-    patty_ax25_addr_hash(&hash, remote);
-    patty_hash_end(&hash);
 
     return patty_dict_delete_with_hash(dict, hash);
 }
 
-static inline void watch_fd(patty_ax25_server *server, int fd) {
+static int sock_close(patty_ax25_server *server,
-    FD_SET(fd, &server->fds_watch);
+                      patty_ax25_sock *sock) {
+    if (sock->status == PATTY_AX25_SOCK_ESTABLISHED) {
+        if (patty_ax25_sock_send_disc(sock, 1) < 0) {
+            goto error_sock_send_disc;
+        }
 
-    if (server->fd_max <= fd) {
+        if (sock_delete_by_addrpair(server->socks_established,
-        server->fd_max  = fd + 1;
+                                    &sock->local,
+                                    &sock->remote) < 0) {
+            goto error_sock_delete_by_addrpair_established;
+        }
     }
-}
 
-static inline void clear_fd(patty_ax25_server *server, int fd) {
+    if (sock->status == PATTY_AX25_SOCK_PENDING_CONNECT) {
-    FD_CLR(fd, &server->fds_watch);
+        if (sock_delete_by_addrpair(server->socks_pending_connect,
-
+                                    &sock->local,
-    if (server->fd_max == fd + 1) {
+                                    &sock->remote) < 0) {
-        server->fd_max--;
+            goto error_sock_delete_by_addrpair_pending_connect;
+        }
     }
-}
 
-static inline void watch_sock(patty_ax25_server *server, patty_ax25_sock *sock) {
+    if (sock->status == PATTY_AX25_SOCK_PENDING_ACCEPT) {
-    watch_fd(server, sock->fd);
+        if (sock_delete_by_addr(server->socks_pending_accept,
-}
+                                &sock->local) < 0) {
+            goto error_sock_delete_by_addr_pending_accept;
+        }
+    }
+
+    if (patty_dict_delete_with_hash(server->socks_by_fd, sock->fd) < 0) {
+        goto error_dict_delete_by_fd_socks;
+    }
+
+    (void)patty_dict_delete_with_hash(server->clients_by_sock, sock->fd);
 
-static inline void clear_sock(patty_ax25_server *server, patty_ax25_sock *sock) {
     clear_fd(server, sock->fd);
+
+    patty_ax25_sock_destroy(sock);
+
+    return 0;
+
+error_dict_delete_by_fd_clients:
+error_dict_delete_by_fd_socks:
+error_sock_delete_by_addr_pending_accept:
+error_sock_delete_by_addrpair_pending_connect:
+error_sock_delete_by_addrpair_established:
+error_sock_send_disc:
+    return -1;
 }
 
 int patty_ax25_server_add_if(patty_ax25_server *server,
@@ -741,25 +739,19 @@ static int server_close(patty_ax25_server *server,
         goto error_sock_by_fd;
     }
 
-    if (sock_delete(server, sock) < 0) {
+    if (sock_close(server, sock) < 0) {
         response.ret = -1;
         response.eno = EBADF;
 
         goto error_sock_delete;
     }
 
-    if (close(request.socket) < 0) {
-        response.ret = -1;
-        response.eno = errno;
-
-        goto error_close;
-    }
-
     response.ret = 0;
     response.eno = 0;
 
 error_close:
 error_sock_delete:
+error_sock_send_disc:
 error_sock_by_fd:
     if (write(client, &response, sizeof(response)) < 0) {
         goto error_io;
@@ -1058,7 +1050,7 @@ static int handle_sabm(patty_ax25_server *server,
         goto error_write;
     }
 
-    watch_sock(server, remote);
+    watch_fd(server, remote->fd);
 
     return 0;
 
@@ -1115,7 +1107,7 @@ static int handle_ua(patty_ax25_server *server,
         goto error_write;
     }
 
-    watch_sock(server, sock);
+    watch_fd(server, sock->fd);
 
     return 0;
 
@@ -1135,6 +1127,12 @@ static int handle_dm(patty_ax25_server *server,
     patty_ax25_sock *sock;
     patty_ax25_call_connect_response response;
 
+    if ((sock = sock_by_addrpair(server->socks_established,
+                                 &frame->dest,
+                                 &frame->src)) != NULL) {
+        return sock_close(server, sock);
+    }
+
     if ((sock = sock_by_addrpair(server->socks_pending_connect,
                                  &frame->dest,
                                  &frame->src)) == NULL) {
@@ -1192,6 +1190,10 @@ static int handle_info(patty_ax25_server *server,
         goto done;
     }
 
+    /*
+     * TODO: Validate RX and TX sequence numbers
+     */
+
     if (write(sock->fd, frame->info, frame->infolen) < 0) {
         goto error_write;
     }
@@ -1203,6 +1205,27 @@ error_write:
     return -1;
 }
 
+static int handle_disc(patty_ax25_server *server,
+                       patty_ax25_if *iface,
+                       patty_ax25_frame *frame) {
+    patty_ax25_sock *sock;
+
+    if ((sock = sock_by_addrpair(server->socks_established,
+                                 &frame->dest,
+                                 &frame->src)) == NULL) {
+        return reply_frmr(iface, frame, PATTY_AX25_FRAME_U_FINAL);
+    }
+
+    if (sock_close(server, sock) < 0) {
+        goto error_sock_delete;
+    }
+
+    return reply_dm(iface, frame, PATTY_AX25_FRAME_U_FINAL);
+
+error_sock_delete:
+    return -1;
+}
+
 static int handle_frame(patty_ax25_server *server,
                         patty_ax25_if *iface,
                         void *buf,
@@ -1226,6 +1249,8 @@ static int handle_frame(patty_ax25_server *server,
         return handle_dm(server, iface, &frame);
     } else if (PATTY_AX25_CONTROL_INFO(frame.control)) {
         return handle_info(server, iface, &frame);
+    } else if (PATTY_AX25_CONTROL_UNNUMBERED_DISC(frame.control)) {
+        return handle_disc(server, iface, &frame);
     }
 
     return 0;
@@ -1304,15 +1329,15 @@ static int handle_sock(void *key,
     }
 
     if ((len = read(sock->fd, sock->buf, sock->bufsz)) < 0) {
+        if (errno == EIO) {
+            (void)sock_close(server, sock);
+
+            goto done;
+        }
+
         goto error_io;
     } else if (len == 0) {
-        clear_sock(server, sock);
+        sock_close(server, sock);
-
-        if (patty_dict_delete(server->socks_established,
-                              NULL + fd,
-                              sizeof(fd)) < 0) {
-            goto error_dict_delete;
-        }
 
         goto done;
     }
@@ -1325,7 +1350,6 @@ done:
     return 0;
 
 error_sock_write:
-error_dict_delete:
 error_io:
     return -1;
 }