- Per-node EVP_CIPHER_CTX to avoid initialisation overhead.

[oweals/tinc.git] / src / net_packet.c

diff --git a/src/net_packet.c b/src/net_packet.c
index 724eaa33e06ac3a3a524b99214502c8818748c1d..e4c4c10a00e25c8c6473586b0adcd4ba9192be03 100644 (file)
--- a/src/net_packet.c
+++ b/src/net_packet.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: net_packet.c,v 1.1.2.27 2003/04/18 21:18:36 guus Exp $
+    $Id: net_packet.c,v 1.1.2.28 2003/05/06 21:13:17 guus Exp $
 */
 
 #include "config.h"
@@ -56,6 +56,7 @@
 #include <openssl/hmac.h>
 
 #include <zlib.h>
+#include <lzo1x.h>
 
 #include <utils.h>
 #include <xalloc.h>
@@ -81,9 +82,51 @@
 int keylifetime = 0;
 int keyexpires = 0;
 EVP_CIPHER_CTX packet_ctx;
+char lzo_wrkmem[MAXSIZE];
+
 
 #define MAX_SEQNO 1073741824
 
+length_t compress_packet(uint8_t *dest, const uint8_t *source, length_t len, int level)
+{
+       if(level == 10) {
+               lzo_uint lzolen = sizeof(lzo_wrkmem);
+               lzo1x_1_compress(source, len, dest, &lzolen, lzo_wrkmem);
+               return lzolen;
+       } else if(level < 10) {
+               unsigned long destlen;
+               if(compress2(dest, &destlen, source, len, level) == Z_OK)
+                       return destlen;
+               else
+                       return -1;
+       } else {
+               lzo_uint lzolen = sizeof(lzo_wrkmem);
+               lzo1x_999_compress(source, len, dest, &lzolen, lzo_wrkmem);
+               return lzolen;
+       }
+       
+       return -1;
+}
+
+length_t uncompress_packet(uint8_t *dest, const uint8_t *source, length_t len, int level)
+{
+       if(level > 9) {
+               lzo_uint lzolen = sizeof(lzo_wrkmem);
+               if(lzo1x_decompress_safe(source, len, dest, &lzolen, NULL) == LZO_E_OK)
+                       return lzolen;
+               else
+                       return -1;
+       } else {
+               unsigned long destlen;
+               if(uncompress(dest, &destlen, source, len) == Z_OK)
+                       return destlen;
+               else
+                       return -1;
+       }
+       
+       return -1;
+}
+
 /* VPN packet I/O */
 
 void receive_udppacket(node_t *n, vpn_packet_t *inpkt)
@@ -119,8 +162,9 @@ void receive_udppacket(node_t *n, vpn_packet_t *inpkt)
        if(myself->cipher) {
                outpkt = pkt[nextpkt++];
 
-               EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, myself->key,
-                                               myself->key + myself->cipher->key_len);
+//             EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, myself->key,
+//                                             myself->key + myself->cipher->key_len);
+               EVP_DecryptInit_ex(&packet_ctx, NULL, NULL, NULL, NULL);
                EVP_DecryptUpdate(&packet_ctx, (char *) &outpkt->seqno, &outlen,
                                                  (char *) &inpkt->seqno, inpkt->len);
                EVP_DecryptFinal_ex(&packet_ctx, (char *) &outpkt->seqno + outlen, &outpad);
@@ -162,13 +206,12 @@ void receive_udppacket(node_t *n, vpn_packet_t *inpkt)
        if(myself->compression) {
                outpkt = pkt[nextpkt++];
 
-               if(uncompress(outpkt->data, &complen, inpkt->data, inpkt->len) != Z_OK) {
+               if((outpkt->len = uncompress_packet(outpkt->data, inpkt->data, inpkt->len, myself->compression)) < 0) {
                        syslog(LOG_ERR, _("Error while uncompressing packet from %s (%s)"),
                                   n->name, n->hostname);
                        return;
                }
 
-               outpkt->len = complen;
                inpkt = outpkt;
        }
 
@@ -248,15 +291,12 @@ void send_udppacket(node_t *n, vpn_packet_t *inpkt)
        if(n->compression) {
                outpkt = pkt[nextpkt++];
 
-               if(compress2
-                  (outpkt->data, &complen, inpkt->data, inpkt->len,
-                       n->compression) != Z_OK) {
+               if((outpkt->len = compress_packet(outpkt->data, inpkt->data, inpkt->len, n->compression)) < 0) {
                        syslog(LOG_ERR, _("Error while compressing packet to %s (%s)"),
                                   n->name, n->hostname);
                        return;
                }
 
-               outpkt->len = complen;
                inpkt = outpkt;
        }
 
@@ -270,10 +310,11 @@ void send_udppacket(node_t *n, vpn_packet_t *inpkt)
        if(n->cipher) {
                outpkt = pkt[nextpkt++];
 
-               EVP_EncryptInit_ex(&packet_ctx, n->cipher, NULL, n->key, n->key + n->cipher->key_len);
-               EVP_EncryptUpdate(&packet_ctx, (char *) &outpkt->seqno, &outlen,
+//             EVP_EncryptInit_ex(&packet_ctx, n->cipher, NULL, n->key, n->key + n->cipher->key_len);
+               EVP_EncryptInit_ex(&n->packet_ctx, NULL, NULL, NULL, NULL);
+               EVP_EncryptUpdate(&n->packet_ctx, (char *) &outpkt->seqno, &outlen,
                                                  (char *) &inpkt->seqno, inpkt->len);
-               EVP_EncryptFinal_ex(&packet_ctx, (char *) &outpkt->seqno + outlen, &outpad);
+               EVP_EncryptFinal_ex(&n->packet_ctx, (char *) &outpkt->seqno + outlen, &outpad);
 
                outpkt->len = outlen + outpad;
                inpkt = outpkt;