Handle UDP packets from different and ports than advertised.

[tinc] / src / net_setup.c

diff --git a/src/net_setup.c b/src/net_setup.c
index 256fdf7..7526779 100644 (file)
--- a/src/net_setup.c
+++ b/src/net_setup.c
@@ -349,88 +349,72 @@ bool setup_myself(void)
        if(get_config_string
           (lookup_config(myself->connection->config_tree, "Cipher"), &cipher)) {
                if(!strcasecmp(cipher, "none")) {
-                       myself->cipher = NULL;
+                       myself->incipher = NULL;
                } else {
-                       myself->cipher = EVP_get_cipherbyname(cipher);
+                       myself->incipher = EVP_get_cipherbyname(cipher);
 
-                       if(!myself->cipher) {
+                       if(!myself->incipher) {
                                logger(LOG_ERR, _("Unrecognized cipher type!"));
                                return false;
                        }
                }
        } else
-               myself->cipher = EVP_bf_cbc();
+               myself->incipher = EVP_bf_cbc();
 
-       if(myself->cipher)
-               myself->keylength = myself->cipher->key_len + myself->cipher->iv_len;
+       if(myself->incipher)
+               myself->inkeylength = myself->incipher->key_len + myself->incipher->iv_len;
        else
-               myself->keylength = 1;
+               myself->inkeylength = 1;
 
        myself->connection->outcipher = EVP_bf_ofb();
 
-       myself->key = xmalloc(myself->keylength);
-       RAND_pseudo_bytes((unsigned char *)myself->key, myself->keylength);
-
        if(!get_config_int(lookup_config(config_tree, "KeyExpire"), &keylifetime))
                keylifetime = 3600;
 
        keyexpires = now + keylifetime;
        
-       if(myself->cipher) {
-               EVP_CIPHER_CTX_init(&packet_ctx);
-               if(!EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, (unsigned char *)myself->key, (unsigned char *)myself->key + myself->cipher->key_len)) {
-                       logger(LOG_ERR, _("Error during initialisation of cipher for %s (%s): %s"),
-                                       myself->name, myself->hostname, ERR_error_string(ERR_get_error(), NULL));
-                       return false;
-               }
-
-       }
-
        /* Check if we want to use message authentication codes... */
 
-       if(get_config_string
-          (lookup_config(myself->connection->config_tree, "Digest"), &digest)) {
+       if(get_config_string(lookup_config(myself->connection->config_tree, "Digest"), &digest)) {
                if(!strcasecmp(digest, "none")) {
-                       myself->digest = NULL;
+                       myself->indigest = NULL;
                } else {
-                       myself->digest = EVP_get_digestbyname(digest);
+                       myself->indigest = EVP_get_digestbyname(digest);
 
-                       if(!myself->digest) {
+                       if(!myself->indigest) {
                                logger(LOG_ERR, _("Unrecognized digest type!"));
                                return false;
                        }
                }
        } else
-               myself->digest = EVP_sha1();
+               myself->indigest = EVP_sha1();
 
        myself->connection->outdigest = EVP_sha1();
 
-       if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"),
-               &myself->maclength)) {
-               if(myself->digest) {
-                       if(myself->maclength > myself->digest->md_size) {
+       if(get_config_int(lookup_config(myself->connection->config_tree, "MACLength"), &myself->inmaclength)) {
+               if(myself->indigest) {
+                       if(myself->inmaclength > myself->indigest->md_size) {
                                logger(LOG_ERR, _("MAC length exceeds size of digest!"));
                                return false;
-                       } else if(myself->maclength < 0) {
+                       } else if(myself->inmaclength < 0) {
                                logger(LOG_ERR, _("Bogus MAC length!"));
                                return false;
                        }
                }
        } else
-               myself->maclength = 4;
+               myself->inmaclength = 4;
 
        myself->connection->outmaclength = 0;
 
        /* Compression */
 
-       if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"),
-               &myself->compression)) {
-               if(myself->compression < 0 || myself->compression > 11) {
+       if(get_config_int(lookup_config(myself->connection->config_tree, "Compression"), &myself->incompression)) {
+               if(myself->incompression < 0 || myself->incompression > 11) {
                        logger(LOG_ERR, _("Bogus compression level!"));
                        return false;
                }
        } else
-               myself->compression = 0;
+               myself->incompression = 0;
 
        myself->connection->outcompression = 0;
 
@@ -547,7 +531,7 @@ bool setup_network_connections(void)
                pingtimeout = pinginterval;
 
        if(!get_config_int(lookup_config(config_tree, "MaxOutputBufferSize"), &maxoutbufsize))
-               maxoutbufsize = 4 * MTU;
+               maxoutbufsize = 10 * MTU;
 
        if(!setup_myself())
                return false;