- wrote clone function for packed
[strongswan.git] / Source / charon / packet.c
index 94b58e5..ba2c0cb 100644 (file)
@@ -1,8 +1,8 @@
 /**
 /**
- * @file packet.h
- *
- * @brief UDP-Packet, contains data, sender and receiver
- *
+ * @file packet.c
+ * 
+ * @brief UDP-Packet, contains data, sender and receiver.
+ * 
  */
 
 /*
  */
 
 /*
 #include "packet.h"
 
 
 #include "packet.h"
 
 
-static status_t destroy(packet_t *this)
+/**
+ * Private data of an packet_t object
+ */
+typedef struct private_packet_s private_packet_t;
+
+struct private_packet_s {
+
+       /**
+        * Public part of a packet_t object
+        */
+       packet_t public;
+       
+       /* private functions */
+       
+       /**
+        * @brief helper function to set address used by set_dest & set_source.
+        * 
+        * @param this          calling object_t
+        * @param family        address family
+        * @param saddr         source address
+        * @param address       address as string
+        * @return                      
+        *                                      - SUCCESS if successfuly
+        *                                      - NOT_SUPPORTED if family is not supported
+        */
+       status_t (*set_addr) (private_packet_t *this, int family, struct sockaddr *saddr, char *address, u_int16_t port);
+};
+
+/**
+ * Implements packet_t's destroy function.
+ * See #packet_s.destroy for description.
+ */
+static status_t destroy(private_packet_t *this)
 {
 {
-       if (this->data.ptr != NULL)
+       if (this->public.data.ptr != NULL)
        {
        {
-               allocator_free(this->data.ptr);
+               allocator_free(this->public.data.ptr);
        }
        allocator_free(this);
        return SUCCESS;
 }
 
 /**
        }
        allocator_free(this);
        return SUCCESS;
 }
 
 /**
- * @brief helper function to set address used by set_dest & set_source
+ * Implements packet_t's clone function.
+ * See #packet_s.clone for description.
+ */
+static status_t clone (private_packet_t *packet, packet_t **clone)
+{
+       *clone = packet_create(packet->public.family);
+       if ((*clone) == NULL)
+       {
+
+               return OUT_OF_RES;
+       }
+
+       
+       (*clone)->sockaddr_len = packet->public.sockaddr_len;
+       (*clone)->source = packet->public.source;
+       (*clone)->destination = packet->public.destination;
+       /* only clone existing chunks :-) */
+       if (packet->public.data.ptr != NULL)
+       {
+               (*clone)->data.ptr = allocator_clone_bytes(packet->public.data.ptr,packet->public.data.len);
+               if ((*clone)->data.ptr == NULL)
+               {
+                       (*clone)->destroy((*clone));
+                       return OUT_OF_RES;
+               }
+               (*clone)->data.len = packet->public.data.len;
+       }
+       return SUCCESS;
+}
+
+/**
+ * Implements private_packet_t's set_addr function.
+ * See #private_packet_t.set_addr for description.
  */
 static status_t set_addr(int family, struct sockaddr *saddr, char *address, u_int16_t port)
 {
  */
 static status_t set_addr(int family, struct sockaddr *saddr, char *address, u_int16_t port)
 {
@@ -54,39 +118,50 @@ static status_t set_addr(int family, struct sockaddr *saddr, char *address, u_in
        return NOT_SUPPORTED;
 }
 
        return NOT_SUPPORTED;
 }
 
-status_t set_destination(packet_t *this, char *address, u_int16_t port)
+/**
+ * Implements packet_t's set_destination function.
+ * See #packet_t.set_destination for description.
+ */
+static status_t set_destination(packet_t *this, char *address, u_int16_t port)
 {
        struct sockaddr *saddr = &(this->destination);
        return set_addr(this->family, saddr, address, port);
 }
 
 {
        struct sockaddr *saddr = &(this->destination);
        return set_addr(this->family, saddr, address, port);
 }
 
-status_t set_source(packet_t *this, char *address, u_int16_t port)
+/**
+ * Implements packet_t's set_source function.
+ * See #packet_t.set_source for description.
+ */
+static status_t set_source(packet_t *this, char *address, u_int16_t port)
 {
        struct sockaddr *saddr = &(this->source);
        return set_addr(this->family, saddr, address, port);
 }
 
 {
        struct sockaddr *saddr = &(this->source);
        return set_addr(this->family, saddr, address, port);
 }
 
-
+/*
+ * Documented in header
+ */
 packet_t *packet_create(int family)
 {
 packet_t *packet_create(int family)
 {
-       packet_t *this = allocator_alloc_thing(packet_t);
+       private_packet_t *this = allocator_alloc_thing(private_packet_t);
 
 
-       this->destroy = destroy;
-       this->set_destination = set_destination;
-       this->set_source = set_source;
+       this->public.destroy = (status_t(*) (packet_t *)) destroy;
+       this->public.set_destination = set_destination;
+       this->public.set_source = set_source;
+       this->public.clone = (status_t(*) (packet_t *,packet_t**))clone;
 
 
-       this->family = family;
+       this->public.family = family;
        switch (family)
        {
                case AF_INET:
        switch (family)
        {
                case AF_INET:
-                       this->sockaddr_len = sizeof(struct sockaddr_in);
+                       this->public.sockaddr_len = sizeof(struct sockaddr_in);
                        break;
                default: /* not supported */
                        allocator_free(this);
                        return NULL;
        }
 
                        break;
                default: /* not supported */
                        allocator_free(this);
                        return NULL;
        }
 
-       this->data.len = 0;
-       this->data.ptr = NULL;
-       return this;
+       this->public.data.len = 0;
+       this->public.data.ptr = NULL;
+       return &(this->public);
 }
 }