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- /* Server for the Midnight Commander Virtual File System.
- Routines for the tcp connection, includes the primitive rpc routines.
-
- Copyright (C) 1995, 1996 Miguel de Icaza
-
- 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 2 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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
- #include <config.h>
- #include <unistd.h>
- #include <stdlib.h>
- #include <stdarg.h>
- #include <stdio.h>
- #include <signal.h>
- #include <pwd.h>
- #include <sys/types.h>
- #include <netdb.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
- #include <arpa/inet.h>
- #include <malloc.h>
-
- #ifdef HAVE_PMAP_SET
- #include <rpc/rpc.h>
- #include <rpc/pmap_prot.h>
- #ifdef HAVE_RPC_PMAP_CLNT_H
- #include <rpc/pmap_clnt.h>
- #endif
- #endif
-
- #ifdef USE_TERMNET
- #include <termnet.h>
- #endif
-
- #include <signal.h>
- #include <errno.h>
- #include "tcputil.h"
- #include "../src/dialog.h" /* for message () */
- #include "../src/mem.h" /* for bcopy */
- #include "../src/util.h" /* for unix_error_string */
- #include "../src/mad.h"
- #include "mcfs.h" /* for mcserver_port definition */
-
- #define CHECK_SIG_PIPE(sock) if (got_sigpipe) \
- { tcp_invalidate_socket (sock); return got_sigpipe = 0; }
-
- extern void tcp_invalidate_socket (int);
-
- int got_sigpipe;
-
- /* Reads a block on dest for len bytes from sock */
- /* Returns a boolean indicating the success status */
- int socket_read_block (int sock, char *dest, int len)
- {
- int nread, n;
-
- for (nread = 0; nread < len;){
- n = read (sock, dest+nread, len-nread);
- if (n <= 0){
- tcp_invalidate_socket (sock);
- return 0;
- }
- nread += n;
- }
- return 1;
- }
-
- int socket_write_block (int sock, char *buffer, int len)
- {
- int left, status;
-
- for (left = len; left > 0;){
- status = write (sock, buffer, left);
- CHECK_SIG_PIPE (sock);
- if (status < 0)
- return 0;
- left -= status;
- buffer += status;
- }
- return 1;
- }
-
- int send_string (int sock, char *string)
- {
- return socket_write_block (sock, string, strlen (string));
- }
-
- int rpc_send (int sock, ...)
- {
- long int tmp, len, cmd;
- char *text;
- va_list ap;
-
- va_start (ap, sock);
-
- for (;;){
- cmd = va_arg (ap, int);
- switch (cmd){
- case RPC_END:
- va_end (ap);
- return 1;
-
- case RPC_INT:
- tmp = htonl (va_arg (ap, int));
- write (sock, &tmp, sizeof (tmp));
- CHECK_SIG_PIPE (sock);
- break;
-
- case RPC_STRING:
- text = va_arg (ap, char *);
- len = strlen (text);
- tmp = htonl (len);
- write (sock, &tmp, sizeof (tmp));
- CHECK_SIG_PIPE (sock);
- write (sock, text, len);
- CHECK_SIG_PIPE (sock);
- break;
-
- case RPC_BLOCK:
- len = va_arg (ap, int);
- text = va_arg (ap, char *);
- tmp = htonl (len);
- write (sock, text, len);
- CHECK_SIG_PIPE (sock);
- break;
-
- default:
- fprintf (stderr, "Unknown rpc message\n");
- abort ();
- }
- }
- }
-
- typedef struct sock_callback_t {
- int sock;
- void (*cback)(int);
- struct sock_callback_t *link;
- } sock_callback_t;
-
- sock_callback_t *sock_callbacks = 0;
-
- static void check_hooks (int sock)
- {
- sock_callback_t *callback, *prev;
-
- for (prev=callback = sock_callbacks; callback; callback = callback->link){
- if (callback->sock != sock){
- prev = callback;
- continue;
- }
- callback->sock = -1;
- (callback->cback)(sock);
- if (callback == sock_callbacks){
- sock_callbacks = callback->link;
- } else {
- prev->link = callback->link;
- }
- free (callback);
- return;
- }
- }
-
- int rpc_get (int sock, ...)
- {
- long int tmp, len;
- char *text, **str_dest;
- int *dest, cmd;
- va_list ap;
-
- va_start (ap, sock);
-
- check_hooks (sock);
-
- for (;;){
- cmd = va_arg (ap, int);
- switch (cmd){
- case RPC_END:
- va_end (ap);
- return 1;
-
- case RPC_INT:
- if (socket_read_block (sock, (char *) &tmp, sizeof (tmp)) == 0)
- return 0;
- dest = va_arg (ap, int *);
- *dest = ntohl (tmp);
- break;
-
- /* returns an allocated string */
- case RPC_STRING:
- if (socket_read_block (sock, (char *)&tmp, sizeof (tmp)) == 0)
- return 0;
- len = ntohl (tmp);
- text = malloc (len+1);
- if (socket_read_block (sock, text, len) == 0)
- return 0;
- str_dest = va_arg (ap, char **);
- *str_dest = text;
- text [len] = 0;
- break;
-
- case RPC_BLOCK:
- len = va_arg (ap, int);
- text = va_arg (ap, char *);
- if (socket_read_block (sock, text, len) == 0)
- return 0;
- break;
-
- default:
- fprintf (stderr, "Unknown rpc message\n");
- abort ();
- }
- }
- }
-
- void rpc_add_get_callback (int sock, void (*cback)(int))
- {
- sock_callback_t *new;
-
- new = malloc (sizeof (sock_callback_t));
- new->cback = cback;
- new->sock = sock;
- new->link = sock_callbacks;
- sock_callbacks = new;
- }
-
- #ifdef IS_AIX
- static void sig_pipe (int unused)
- #else
- static void sig_pipe (void)
- #endif
- {
- got_sigpipe = 1;
- signal (SIGPIPE, sig_pipe); /* Reset the signal handler */
- }
-
- void tcp_init (void)
- {
- got_sigpipe = 0;
- signal (SIGPIPE, sig_pipe);
- }
-
- int get_remote_port (struct sockaddr_in *sin)
- {
- int port;
-
- #ifdef HAVE_PMAP_GETPORT
- port = pmap_getport (sin, RPC_PROGNUM, RPC_PROGVER, IPPROTO_TCP);
- if (port == 0)
- return mcserver_port;
- else
- return port;
- #else
- return mcserver_port;
- #endif
- }
-
-
-