From 90eb2a6d56a4287410fd5d2717e70d01e80c9a3d Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@anytun.org>
Date: Wed, 31 Dec 2008 18:21:29 +0000
Subject: removed useless malloc for cipher_t

---
 src/cipher.c  | 39 +++++++++++++++++----------------------
 src/cipher.h  |  4 ++--
 src/uanytun.c | 12 ++++++------
 3 files changed, 25 insertions(+), 30 deletions(-)

diff --git a/src/cipher.c b/src/cipher.c
index b3a8480..c9ea45b 100644
--- a/src/cipher.c
+++ b/src/cipher.c
@@ -44,29 +44,27 @@
 #include <stdlib.h>
 #include <string.h>
 
-void cipher_init(cipher_t** c, const char* type)
+int cipher_init(cipher_t* c, const char* type)
 {
   if(!c) 
-    return;
-
-  *c = malloc(sizeof(cipher_t));
-  if(!*c)
-    return;
+    return -1;
 
-  (*c)->type_ = unknown;
+  c->type_ = unknown;
   if(!strcmp(type, "null"))
-    (*c)->type_ = null;
+    c->type_ = null;
 /*   else if(!strcmp(type, "aes-ctr")) */
-/*     (*c)->type_ = aes_ctr; */
+/*     c->type_ = aes_ctr; */
   else {
     log_printf(ERR, "unknown cipher type");
   }
 
-  (*c)->key_.buf_ = NULL;
-  (*c)->key_.length_ = 0;
+  c->key_.buf_ = NULL;
+  c->key_.length_ = 0;
 
-  (*c)->salt_.buf_ = NULL;
-  (*c)->salt_.length_ = 0;
+  c->salt_.buf_ = NULL;
+  c->salt_.length_ = 0;
+
+  return 0;
 }
 
 void cipher_set_key(cipher_t* c, u_int8_t* key, u_int32_t len)
@@ -105,18 +103,15 @@ void cipher_set_salt(cipher_t* c, u_int8_t* salt, u_int32_t len)
   c->salt_.length_ = len;
 }
 
-void cipher_close(cipher_t** c)
+void cipher_close(cipher_t* c)
 {
-  if(!c || !(*c))
+  if(!c)
     return;
 
-  if((*c)->key_.buf_)
-    free((*c)->key_.buf_);
-  if((*c)->salt_.buf_)
-    free((*c)->salt_.buf_);
-
-  free(*c);
-  *c = NULL;
+  if(c->key_.buf_)
+    free(c->key_.buf_);
+  if(c->salt_.buf_)
+    free(c->salt_.buf_);
 }
 
 void cipher_encrypt(cipher_t* c, plain_packet_t* in, encrypted_packet_t* out, seq_nr_t seq_nr, sender_id_t sender_id, mux_t mux)
diff --git a/src/cipher.h b/src/cipher.h
index 0bb3f5f..344b7a0 100644
--- a/src/cipher.h
+++ b/src/cipher.h
@@ -45,10 +45,10 @@ struct cipher_struct {
 };
 typedef struct cipher_struct cipher_t;
 
-void cipher_init(cipher_t** c, const char* type);
+int cipher_init(cipher_t* c, const char* type);
 void cipher_set_key(cipher_t* c, u_int8_t* key, u_int32_t len);
 void cipher_set_salt(cipher_t* c, u_int8_t* salt, u_int32_t len);
-void cipher_close(cipher_t** c);
+void cipher_close(cipher_t* c);
 
 void cipher_encrypt(cipher_t* c, plain_packet_t* in, encrypted_packet_t* out, seq_nr_t seq_nr, sender_id_t sender_id, mux_t mux);
 void cipher_decrypt(cipher_t* c, encrypted_packet_t* in, plain_packet_t* out);
diff --git a/src/uanytun.c b/src/uanytun.c
index 1225690..c2f5585 100644
--- a/src/uanytun.c
+++ b/src/uanytun.c
@@ -69,11 +69,11 @@ int main_loop(tun_device_t* dev, udp_socket_t* sock, options_t* opt)
   seq_nr_t seq_nr = 0;
   fd_set readfds;
 
-  cipher_t* c;
-  cipher_init(&c, opt->cipher_);
-  if(!c) {
+  cipher_t c;
+  int ret = cipher_init(&c, opt->cipher_);
+  if(ret) {
     log_printf(ERR, "could not initialize cipher of type %s", opt->cipher_);
-    return_value -1;
+    return_value = ret;
   }
 
   seq_win_t* seq_win;
@@ -122,7 +122,7 @@ int main_loop(tun_device_t* dev, udp_socket_t* sock, options_t* opt)
       else
         plain_packet_set_type(&plain_packet, PAYLOAD_TYPE_UNKNOWN);
       
-      cipher_encrypt(c, &plain_packet, &encrypted_packet, seq_nr, opt->sender_id_, opt->mux_); 
+      cipher_encrypt(&c, &plain_packet, &encrypted_packet, seq_nr, opt->sender_id_, opt->mux_); 
       seq_nr++;
       
           // TODO: add auth-tag
@@ -165,7 +165,7 @@ int main_loop(tun_device_t* dev, udp_socket_t* sock, options_t* opt)
         free(addrstring);
       }
       
-      cipher_decrypt(c, &encrypted_packet, &plain_packet); 
+      cipher_decrypt(&c, &encrypted_packet, &plain_packet); 
       
       len = tun_write(dev, plain_packet_get_payload(&plain_packet), plain_packet_get_payload_length(&plain_packet));
       if(len == -1)
-- 
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