author | viric <viriketo@gmail.com> |
Wed, 16 Feb 2011 21:07:11 +0100 | |
branch | saveflie |
changeset 95 | 13360d8af313 |
parent 53 | 07500c5c53cb |
permissions | -rw-r--r-- |
53 | 1 |
/* |
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Terminal Mixer - multi-point multi-user access to terminal applications |
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Copyright (C) 2007 LluĂs Batlle i Rossell |
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Please find the license in the provided COPYING file. |
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*/ |
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#include <stdlib.h> |
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#include <assert.h> |
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#include <unistd.h> |
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#include <stdio.h> |
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#include <sys/un.h> |
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#include <sys/socket.h> |
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#include <sys/select.h> |
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#include "main.h" |
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#include "handlers.h" |
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static int served_sockets = 0; |
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static int listen_socket = -1; /* not listening */ |
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static int connected_sockets = 0; |
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static int *conn_sockets = 0; |
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static char *socket_path = 0; |
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static char default_path_prefix[] = "/tmp/tm-socket."; |
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void get_unix_path() |
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{ |
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char *new; |
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new = getenv("TM_SOCKET"); |
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if (new == 0) /* Compose the path from the default values */ |
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{ |
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char num[20]; /* enough for an int */ |
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int len; |
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sprintf(num, "%i", (int) getuid()); |
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len = strlen(default_path_prefix) + strlen(num) + 1; |
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command_line.unix_path = malloc(len); |
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sprintf(command_line.unix_path, "%s%s", |
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default_path_prefix, num); |
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} else |
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{ |
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command_line.unix_path = malloc(strlen(new) + 1); |
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strcpy(command_line.unix_path, new); |
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} |
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} |
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static void start_listening(int new) |
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{ |
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int ls; |
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struct sockaddr_un addr; |
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int res; |
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assert(new > 0); |
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assert(command_line.unix_path != 0); |
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socket_path = command_line.unix_path; |
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ls = socket(AF_UNIX, SOCK_STREAM, 0); |
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if (ls == -1) |
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error("Cannot create the unix listen socket in the server"); |
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addr.sun_family = AF_UNIX; |
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strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path)); |
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res = bind(ls, (struct sockaddr *) & addr, sizeof(addr)); |
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if (res == -1) |
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error("Error binding to %s", socket_path); |
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/* NUANCE: 0 backlog. Why should we assure future connections? */ |
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res = listen(ls, 0); |
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if (res == -1) |
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error("Error listening on the binded unix socket"); |
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listen_socket = ls; |
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} |
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void s_unix_update_served(int new) |
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{ |
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if (new > served_sockets && new > 0 ) |
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{ |
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conn_sockets = realloc(conn_sockets, sizeof(*conn_sockets) * new); |
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if (listen_socket == -1) /* not listening */ |
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{ |
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start_listening(new); |
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} |
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served_sockets = new; |
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} |
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else if (new < served_sockets) |
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{ |
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not_implemented("new < served_sockets at unix_update_served"); |
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} |
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} |
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void s_unix_shutdown() |
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{ |
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int i; |
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if (listen_socket != -1) |
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{ |
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close(listen_socket); |
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unlink(socket_path); |
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} |
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for (i=0; i < connected_sockets; ++i) |
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{ |
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close(conn_sockets[i]); |
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} |
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connected_sockets = 0; |
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served_sockets = 0; |
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} |
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void s_unix_prepare_read_fdset(fd_set *read_set, int *maxfd) |
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{ |
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int i; |
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37
b0588bddef91
Option for xterm resizing. Over max connections, close() at once.
viric@llimona
parents:
36
diff
changeset
|
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FD_SET(listen_socket, read_set); |
b0588bddef91
Option for xterm resizing. Over max connections, close() at once.
viric@llimona
parents:
36
diff
changeset
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*maxfd = max(*maxfd, listen_socket); |
21 | 125 |
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for (i=0; i < connected_sockets; ++i) |
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{ |
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/* We only accept if we don't have any |
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* connetion opened. */ |
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FD_SET(conn_sockets[i], read_set); |
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*maxfd = max(*maxfd, conn_sockets[i]); |
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} |
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} |
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static void remove_conn_socket(int n) |
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{ |
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int i; |
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assert(n >= 0); |
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for(i=n+1; i<connected_sockets; ++i) |
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{ |
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conn_sockets[i-1] = conn_sockets[i]; |
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} |
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connected_sockets -= 1; |
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/* We shrink the memory until we have an array for served_sockets */ |
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if (served_sockets <= connected_sockets) |
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{ |
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conn_sockets = realloc(conn_sockets, sizeof(*conn_sockets) |
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* connected_sockets); |
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} |
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} |
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static int accept_connection(int ls) |
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{ |
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int cs; |
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cs = accept(ls, 0, 0); |
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if (cs == -1) |
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not_implemented("accept unix socket error check"); |
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/* TODO: Prepare unblocking sockets if needed */ |
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return cs; |
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} |
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void s_unix_process_read_fdset(fd_set *read_set) |
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{ |
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int i; |
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/* Active streams */ |
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for (i=0; i < connected_sockets; ++i) |
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{ |
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if (FD_ISSET(conn_sockets[i], read_set)) |
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{ |
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int res; |
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res = read(conn_sockets[i], stream_buffer, |
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stream_buffer_size); |
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if (res == 0) |
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{ |
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close(conn_sockets[i]); |
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remove_conn_socket(i); |
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} else |
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{ |
|
32
df110f784648
Added read-only clients, added stdin-close option to clients.
lbatlle@npdl268.bpo.hp.com
parents:
22
diff
changeset
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app_control_remote_send_to_stdin(stream_buffer, res); |
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} |
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} |
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} |
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/* Listen connection */ |
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37
b0588bddef91
Option for xterm resizing. Over max connections, close() at once.
viric@llimona
parents:
36
diff
changeset
|
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if (FD_ISSET(listen_socket, read_set)) |
21 | 192 |
{ |
37
b0588bddef91
Option for xterm resizing. Over max connections, close() at once.
viric@llimona
parents:
36
diff
changeset
|
193 |
if (served_sockets > connected_sockets) |
21 | 194 |
{ |
36
da427c23d755
Added dumps, telnet_filter, applied filters in tm, improved telnet experience.
viric@llimona
parents:
34
diff
changeset
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int s; |
da427c23d755
Added dumps, telnet_filter, applied filters in tm, improved telnet experience.
viric@llimona
parents:
34
diff
changeset
|
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s = accept_connection(listen_socket); |
da427c23d755
Added dumps, telnet_filter, applied filters in tm, improved telnet experience.
viric@llimona
parents:
34
diff
changeset
|
197 |
conn_sockets[connected_sockets++] = s; |
da427c23d755
Added dumps, telnet_filter, applied filters in tm, improved telnet experience.
viric@llimona
parents:
34
diff
changeset
|
198 |
welcome_new_client_socket(s); |
37
b0588bddef91
Option for xterm resizing. Over max connections, close() at once.
viric@llimona
parents:
36
diff
changeset
|
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} else |
b0588bddef91
Option for xterm resizing. Over max connections, close() at once.
viric@llimona
parents:
36
diff
changeset
|
200 |
{ |
b0588bddef91
Option for xterm resizing. Over max connections, close() at once.
viric@llimona
parents:
36
diff
changeset
|
201 |
int s; |
b0588bddef91
Option for xterm resizing. Over max connections, close() at once.
viric@llimona
parents:
36
diff
changeset
|
202 |
s = accept_connection(listen_socket); |
b0588bddef91
Option for xterm resizing. Over max connections, close() at once.
viric@llimona
parents:
36
diff
changeset
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close(s); |
21 | 204 |
} |
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} |
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} |
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void s_unix_send_to_connected(const char *buffer, size_t size) |
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{ |
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int i; |
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for (i=0; i < connected_sockets; ++i) |
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{ |
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write(conn_sockets[i], buffer, size); |
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} |
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} |