Import Upstream version 1.0.3
This commit is contained in:
Guus Sliepen
parent
ed8d36a434
commit
c12028eeaa
196 changed files with 43077 additions and 32886 deletions
304
src/meta.c
304
src/meta.c
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@ -1,7 +1,7 @@
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/*
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meta.c -- handle the meta communication
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Copyright (C) 2000-2002 Guus Sliepen <guus@sliepen.warande.net>,
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2000-2002 Ivo Timmermans <itimmermans@bigfoot.com>
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Copyright (C) 2000-2004 Guus Sliepen <guus@tinc-vpn.org>,
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2000-2004 Ivo Timmermans <ivo@tinc-vpn.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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@ -17,194 +17,182 @@
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: meta.c,v 1.1.2.25 2002/03/01 14:09:31 guus Exp $
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$Id: meta.c 1391 2004-09-20 20:56:14Z guus $
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*/
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#include "config.h"
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#include <utils.h>
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#include <avl_tree.h>
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#include <errno.h>
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#include <syslog.h>
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#include <unistd.h>
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#include <string.h>
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/* This line must be below the rest for FreeBSD */
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#include <sys/types.h>
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#include <sys/socket.h>
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#include "system.h"
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#include <openssl/err.h>
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#include <openssl/evp.h>
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#include "net.h"
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#include "avl_tree.h"
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#include "connection.h"
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#include "system.h"
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#include "logger.h"
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#include "meta.h"
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#include "net.h"
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#include "protocol.h"
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#include "utils.h"
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int send_meta(connection_t *c, char *buffer, int length)
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bool send_meta(connection_t *c, const char *buffer, int length)
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{
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char *bufp;
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int outlen;
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char outbuf[MAXBUFSIZE];
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cp
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if(debug_lvl >= DEBUG_META)
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syslog(LOG_DEBUG, _("Sending %d bytes of metadata to %s (%s)"), length,
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c->name, c->hostname);
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const char *bufp;
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int outlen;
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char outbuf[MAXBUFSIZE];
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int result;
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if(c->status.encryptout)
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{
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EVP_EncryptUpdate(c->outctx, outbuf, &outlen, buffer, length);
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bufp = outbuf;
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length = outlen;
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}
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else
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bufp = buffer;
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cp();
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if(write(c->socket, bufp, length) < 0)
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{
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syslog(LOG_ERR, _("Sending meta data to %s (%s) failed: %s"), c->name, c->hostname, strerror(errno));
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return -1;
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}
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cp
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return 0;
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ifdebug(META) logger(LOG_DEBUG, _("Sending %d bytes of metadata to %s (%s)"), length,
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c->name, c->hostname);
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if(c->status.encryptout) {
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result = EVP_EncryptUpdate(c->outctx, outbuf, &outlen, buffer, length);
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if(!result || outlen != length) {
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logger(LOG_ERR, _("Error while encrypting metadata to %s (%s): %s"),
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c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL));
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return false;
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}
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bufp = outbuf;
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length = outlen;
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} else
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bufp = buffer;
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while(length) {
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result = send(c->socket, bufp, length, 0);
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if(result <= 0) {
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if(!errno || errno == EPIPE) {
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ifdebug(CONNECTIONS) logger(LOG_NOTICE, _("Connection closed by %s (%s)"),
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c->name, c->hostname);
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} else if(errno == EINTR)
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continue;
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else
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logger(LOG_ERR, _("Sending meta data to %s (%s) failed: %s"), c->name,
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c->hostname, strerror(errno));
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return false;
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}
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bufp += result;
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length -= result;
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}
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return true;
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}
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void broadcast_meta(connection_t *from, char *buffer, int length)
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void broadcast_meta(connection_t *from, const char *buffer, int length)
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{
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avl_node_t *node;
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connection_t *c;
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cp
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for(node = connection_tree->head; node; node = node->next)
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{
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c = (connection_t *)node->data;
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if(c != from && c->status.active)
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send_meta(c, buffer, length);
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}
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cp
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avl_node_t *node;
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connection_t *c;
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cp();
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for(node = connection_tree->head; node; node = node->next) {
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c = node->data;
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if(c != from && c->status.active)
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send_meta(c, buffer, length);
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}
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}
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int receive_meta(connection_t *c)
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bool receive_meta(connection_t *c)
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{
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int x, l = sizeof(x);
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int oldlen, i;
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int lenin, reqlen;
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int decrypted = 0;
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char inbuf[MAXBUFSIZE];
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cp
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if(getsockopt(c->socket, SOL_SOCKET, SO_ERROR, &x, &l) < 0)
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{
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syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%s %s (%s)"), __FILE__, __LINE__, c->socket, strerror(errno),
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c->name, c->hostname);
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return -1;
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}
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if(x)
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{
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syslog(LOG_ERR, _("Metadata socket error for %s (%s): %s"),
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c->name, c->hostname, strerror(x));
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return -1;
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}
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int oldlen, i, result;
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int lenin, lenout, reqlen;
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bool decrypted = false;
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char inbuf[MAXBUFSIZE];
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/* Strategy:
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- Read as much as possible from the TCP socket in one go.
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- Decrypt it.
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- Check if a full request is in the input buffer.
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- If yes, process request and remove it from the buffer,
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then check again.
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- If not, keep stuff in buffer and exit.
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*/
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cp();
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lenin = read(c->socket, c->buffer + c->buflen, MAXBUFSIZE - c->buflen);
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/* Strategy:
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- Read as much as possible from the TCP socket in one go.
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- Decrypt it.
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- Check if a full request is in the input buffer.
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- If yes, process request and remove it from the buffer,
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then check again.
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- If not, keep stuff in buffer and exit.
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*/
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if(lenin<=0)
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{
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if(lenin==0)
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{
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if(debug_lvl >= DEBUG_CONNECTIONS)
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syslog(LOG_NOTICE, _("Connection closed by %s (%s)"),
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c->name, c->hostname);
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}
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else
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if(errno==EINTR)
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return 0;
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else
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syslog(LOG_ERR, _("Metadata socket read error for %s (%s): %s"),
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c->name, c->hostname, strerror(errno));
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lenin = recv(c->socket, c->buffer + c->buflen, MAXBUFSIZE - c->buflen, 0);
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return -1;
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}
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if(lenin <= 0) {
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if(!lenin || !errno) {
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ifdebug(CONNECTIONS) logger(LOG_NOTICE, _("Connection closed by %s (%s)"),
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c->name, c->hostname);
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} else if(errno == EINTR)
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return true;
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else
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logger(LOG_ERR, _("Metadata socket read error for %s (%s): %s"),
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c->name, c->hostname, strerror(errno));
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oldlen = c->buflen;
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c->buflen += lenin;
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return false;
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}
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while(lenin)
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{
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/* Decrypt */
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oldlen = c->buflen;
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c->buflen += lenin;
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if(c->status.decryptin && !decrypted)
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{
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EVP_DecryptUpdate(c->inctx, inbuf, &lenin, c->buffer + oldlen, lenin);
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memcpy(c->buffer + oldlen, inbuf, lenin);
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decrypted = 1;
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}
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while(lenin > 0) {
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/* Decrypt */
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/* Are we receiving a TCPpacket? */
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if(c->status.decryptin && !decrypted) {
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result = EVP_DecryptUpdate(c->inctx, inbuf, &lenout, c->buffer + oldlen, lenin);
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if(!result || lenout != lenin) {
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logger(LOG_ERR, _("Error while decrypting metadata from %s (%s): %s"),
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c->name, c->hostname, ERR_error_string(ERR_get_error(), NULL));
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return false;
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}
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memcpy(c->buffer + oldlen, inbuf, lenin);
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decrypted = true;
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}
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if(c->tcplen)
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{
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if(c->tcplen <= c->buflen)
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{
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receive_tcppacket(c, c->buffer, c->tcplen);
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/* Are we receiving a TCPpacket? */
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c->buflen -= c->tcplen;
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lenin -= c->tcplen;
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memmove(c->buffer, c->buffer + c->tcplen, c->buflen);
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oldlen = 0;
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c->tcplen = 0;
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continue;
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}
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else
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{
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break;
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}
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}
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if(c->tcplen) {
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if(c->tcplen <= c->buflen) {
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receive_tcppacket(c, c->buffer, c->tcplen);
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/* Otherwise we are waiting for a request */
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c->buflen -= c->tcplen;
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lenin -= c->tcplen - oldlen;
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memmove(c->buffer, c->buffer + c->tcplen, c->buflen);
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oldlen = 0;
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c->tcplen = 0;
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continue;
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} else {
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break;
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}
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}
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reqlen = 0;
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/* Otherwise we are waiting for a request */
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for(i = oldlen; i < c->buflen; i++)
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{
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if(c->buffer[i] == '\n')
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{
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c->buffer[i] = '\0'; /* replace end-of-line by end-of-string so we can use sscanf */
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reqlen = i + 1;
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break;
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}
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}
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reqlen = 0;
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if(reqlen)
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{
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if(receive_request(c))
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return -1;
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for(i = oldlen; i < c->buflen; i++) {
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if(c->buffer[i] == '\n') {
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c->buffer[i] = '\0'; /* replace end-of-line by end-of-string so we can use sscanf */
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reqlen = i + 1;
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break;
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}
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}
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c->buflen -= reqlen;
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lenin -= reqlen;
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memmove(c->buffer, c->buffer + reqlen, c->buflen);
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oldlen = 0;
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continue;
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}
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else
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{
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break;
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}
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}
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if(reqlen) {
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c->reqlen = reqlen;
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if(!receive_request(c))
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return false;
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if(c->buflen >= MAXBUFSIZE)
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{
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syslog(LOG_ERR, _("Metadata read buffer overflow for %s (%s)"),
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c->name, c->hostname);
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return -1;
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}
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c->buflen -= reqlen;
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lenin -= reqlen - oldlen;
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memmove(c->buffer, c->buffer + reqlen, c->buflen);
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oldlen = 0;
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continue;
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} else {
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break;
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}
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}
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c->last_ping_time = now;
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cp
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return 0;
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if(c->buflen >= MAXBUFSIZE) {
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logger(LOG_ERR, _("Metadata read buffer overflow for %s (%s)"),
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c->name, c->hostname);
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return false;
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}
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c->last_ping_time = now;
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return true;
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}
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