- moved packet and socket in new network-package
This commit is contained in:
Martin Willi
@@ -0,0 +1,130 @@
|
||||
/**
|
||||
* @file packet.c
|
||||
*
|
||||
* @brief UDP-Packet, contains data, sender and receiver.
|
||||
*
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2005 Jan Hutter, Martin Willi
|
||||
* Hochschule fuer Technik Rapperswil
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* for more details.
|
||||
*/
|
||||
|
||||
|
||||
#include "packet.h"
|
||||
|
||||
#include <utils/allocator.h>
|
||||
|
||||
|
||||
/**
|
||||
* 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;
|
||||
};
|
||||
|
||||
/**
|
||||
* Implements packet_t's destroy function.
|
||||
* See #packet_s.destroy for description.
|
||||
*/
|
||||
static status_t destroy(private_packet_t *this)
|
||||
{
|
||||
if (this->public.source != NULL)
|
||||
{
|
||||
this->public.source->destroy(this->public.source);
|
||||
}
|
||||
if (this->public.destination != NULL)
|
||||
{
|
||||
this->public.destination->destroy(this->public.destination);
|
||||
}
|
||||
if (this->public.data.ptr != NULL)
|
||||
{
|
||||
allocator_free(this->public.data.ptr);
|
||||
}
|
||||
allocator_free(this);
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
* Implements packet_t's clone function.
|
||||
* See #packet_s.clone for description.
|
||||
*/
|
||||
static status_t clone (private_packet_t *this, packet_t **clone)
|
||||
{
|
||||
packet_t *other;
|
||||
other = packet_create();
|
||||
if (other == NULL)
|
||||
{
|
||||
return OUT_OF_RES;
|
||||
}
|
||||
|
||||
if (this->public.destination != NULL)
|
||||
{
|
||||
this->public.destination->clone(this->public.destination, &(other->destination));
|
||||
}
|
||||
else {
|
||||
other->destination = NULL;
|
||||
}
|
||||
|
||||
if (this->public.source != NULL)
|
||||
{
|
||||
this->public.source->clone(this->public.source, &(other->source));
|
||||
}
|
||||
else {
|
||||
other->source = NULL;
|
||||
}
|
||||
|
||||
/* only clone existing chunks :-) */
|
||||
if (this->public.data.ptr != NULL)
|
||||
{
|
||||
other->data.ptr = allocator_clone_bytes(this->public.data.ptr,this->public.data.len);
|
||||
if (other->data.ptr == NULL)
|
||||
{
|
||||
other->destroy(other);
|
||||
return OUT_OF_RES;
|
||||
}
|
||||
other->data.len = this->public.data.len;
|
||||
}
|
||||
else
|
||||
{
|
||||
other->data.ptr = NULL;
|
||||
other->data.len = 0;
|
||||
}
|
||||
*clone = other;
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Documented in header
|
||||
*/
|
||||
packet_t *packet_create()
|
||||
{
|
||||
private_packet_t *this = allocator_alloc_thing(private_packet_t);
|
||||
|
||||
this->public.destroy = (status_t(*) (packet_t *)) destroy;
|
||||
this->public.clone = (status_t(*) (packet_t *,packet_t**))clone;
|
||||
|
||||
this->public.destination = NULL;
|
||||
this->public.source = NULL;
|
||||
|
||||
this->public.data.len = 0;
|
||||
this->public.data.ptr = NULL;
|
||||
return &(this->public);
|
||||
}
|
||||
@@ -0,0 +1,80 @@
|
||||
/**
|
||||
* @file packet.h
|
||||
*
|
||||
* @brief UDP-Packet, contains data, sender and receiver.
|
||||
*
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2005 Jan Hutter, Martin Willi
|
||||
* Hochschule fuer Technik Rapperswil
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* for more details.
|
||||
*/
|
||||
|
||||
#ifndef PACKET_H_
|
||||
#define PACKET_H_
|
||||
|
||||
|
||||
#include <types.h>
|
||||
#include <utils/host.h>
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* @brief UDP-Packet, contains data, sender and receiver
|
||||
*/
|
||||
typedef struct packet_s packet_t;
|
||||
struct packet_s {
|
||||
|
||||
/**
|
||||
* source address structure
|
||||
*/
|
||||
host_t *source;
|
||||
|
||||
/**
|
||||
* destination address structure
|
||||
*/
|
||||
host_t *destination;
|
||||
|
||||
/**
|
||||
* message data
|
||||
*/
|
||||
chunk_t data;
|
||||
|
||||
/**
|
||||
* @brief Clones a packet_t object
|
||||
*
|
||||
* @param packet calling object
|
||||
* @param clone pointer to a packet_t object pointer where the new object is stored
|
||||
* @return - SUCCESS if successful
|
||||
* - OUT_OF_RES
|
||||
*/
|
||||
status_t (*clone) (packet_t *packet, packet_t **clone);
|
||||
|
||||
/**
|
||||
* @brief destroy the packet, freeing contained data
|
||||
*
|
||||
* @param packet packet to destroy
|
||||
* @return - SUCCESS
|
||||
*/
|
||||
status_t (*destroy) (packet_t *packet);
|
||||
};
|
||||
|
||||
/**
|
||||
* @brief create an empty packet
|
||||
*
|
||||
* @param family address-family, such as AF_INET
|
||||
* @return - NULL when family not supported
|
||||
*/
|
||||
packet_t *packet_create();
|
||||
|
||||
#endif /*PACKET_H_*/
|
||||
@@ -0,0 +1,186 @@
|
||||
/**
|
||||
* @file socket.c
|
||||
*
|
||||
* @brief management of sockets
|
||||
*
|
||||
* receiver reads from here, sender writes to here
|
||||
*
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2005 Jan Hutter, Martin Willi
|
||||
* Hochschule fuer Technik Rapperswil
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* for more details.
|
||||
*/
|
||||
|
||||
#include <pthread.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/socket.h>
|
||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#include "socket.h"
|
||||
|
||||
#include <globals.h>
|
||||
#include <utils/allocator.h>
|
||||
#include <utils/logger_manager.h>
|
||||
|
||||
typedef struct private_socket_s private_socket_t;
|
||||
|
||||
struct private_socket_s{
|
||||
/**
|
||||
* public functions
|
||||
*/
|
||||
socket_t public;
|
||||
|
||||
/**
|
||||
* currently we only have one socket, maybe more in the future ?
|
||||
*/
|
||||
int socket_fd;
|
||||
/**
|
||||
* logger for this socket
|
||||
*/
|
||||
logger_t *logger;
|
||||
};
|
||||
|
||||
/**
|
||||
* implementation of socket_t.receive
|
||||
*/
|
||||
status_t receiver(private_socket_t *this, packet_t **packet)
|
||||
{
|
||||
char buffer[MAX_PACKET];
|
||||
int oldstate;
|
||||
packet_t *pkt = packet_create();
|
||||
|
||||
/* add packet destroy handler for cancellation, enable cancellation */
|
||||
pthread_cleanup_push((void(*)(void*))pkt->destroy, (void*)pkt);
|
||||
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &oldstate);
|
||||
|
||||
pkt->source = host_create(AF_INET, "0.0.0.0", 0);
|
||||
pkt->destination = host_create(AF_INET, "0.0.0.0", 0);
|
||||
|
||||
|
||||
this->logger->log(this->logger, CONTROL|MORE, "going to read from socket");
|
||||
/* do the read */
|
||||
pkt->data.len = recvfrom(this->socket_fd, buffer, MAX_PACKET, 0,
|
||||
pkt->source->get_sockaddr(pkt->source),
|
||||
pkt->source->get_sockaddr_len(pkt->source));
|
||||
|
||||
/* reset cancellation, remove packet destroy handler (without executing) */
|
||||
pthread_setcancelstate(oldstate, NULL);
|
||||
pthread_cleanup_pop(0);
|
||||
|
||||
|
||||
/* TODO: get senders destination address, using
|
||||
* IP_PKTINFO and recvmsg */
|
||||
|
||||
if (pkt->data.len < 0)
|
||||
{
|
||||
pkt->destroy(pkt);
|
||||
this->logger->log(this->logger, ERROR, "error reading from socket: %s", strerror(errno));
|
||||
return FAILED;
|
||||
}
|
||||
|
||||
this->logger->log(this->logger, CONTROL, "received packet from %s:%d",
|
||||
pkt->source->get_address(pkt->source),
|
||||
pkt->source->get_port(pkt->source));
|
||||
|
||||
/* fill in packet */
|
||||
pkt->data.ptr = allocator_alloc(pkt->data.len);
|
||||
memcpy(pkt->data.ptr, buffer, pkt->data.len);
|
||||
|
||||
/* return packet */
|
||||
*packet = pkt;
|
||||
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
* implementation of socket_t.send
|
||||
*/
|
||||
status_t sender(private_socket_t *this, packet_t *packet)
|
||||
{
|
||||
ssize_t bytes_sent;
|
||||
|
||||
|
||||
this->logger->log(this->logger, CONTROL, "sending packet to %s:%d",
|
||||
packet->destination->get_address(packet->destination),
|
||||
packet->destination->get_port(packet->destination));
|
||||
/* send data */
|
||||
bytes_sent = sendto(this->socket_fd, packet->data.ptr, packet->data.len,
|
||||
0, packet->destination->get_sockaddr(packet->destination),
|
||||
*(packet->destination->get_sockaddr_len(packet->destination)));
|
||||
|
||||
if (bytes_sent != packet->data.len)
|
||||
{
|
||||
this->logger->log(this->logger, ERROR, "error writing to socket: %s", strerror(errno));
|
||||
return FAILED;
|
||||
}
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
* implementation of socket_t.destroy
|
||||
*/
|
||||
status_t destroy(private_socket_t *this)
|
||||
{
|
||||
close(this->socket_fd);
|
||||
global_logger_manager->destroy_logger(global_logger_manager, this->logger);
|
||||
allocator_free(this);
|
||||
|
||||
return SUCCESS;
|
||||
}
|
||||
|
||||
socket_t *socket_create(u_int16_t port)
|
||||
{
|
||||
private_socket_t *this = allocator_alloc_thing(private_socket_t);
|
||||
struct sockaddr_in addr;
|
||||
|
||||
/* public functions */
|
||||
this->public.send = (status_t(*)(socket_t*, packet_t*))sender;
|
||||
this->public.receive = (status_t(*)(socket_t*, packet_t**))receiver;
|
||||
this->public.destroy = (status_t(*)(socket_t*))destroy;
|
||||
|
||||
|
||||
this->logger = global_logger_manager->create_logger(global_logger_manager, SOCKET, NULL);
|
||||
if (this->logger == NULL)
|
||||
{
|
||||
allocator_free(this);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* create default ipv4 socket */
|
||||
this->socket_fd = socket(PF_INET, SOCK_DGRAM, 0);
|
||||
if (this->socket_fd < 0)
|
||||
{
|
||||
this->logger->log(this->logger, ERROR, "unable to open socket: %s", strerror(errno));
|
||||
global_logger_manager->destroy_logger(global_logger_manager, this->logger);
|
||||
allocator_free(this);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* bind socket to all interfaces */
|
||||
addr.sin_family = AF_INET;
|
||||
addr.sin_addr.s_addr = INADDR_ANY;
|
||||
addr.sin_port = htons(port);
|
||||
if (bind(this->socket_fd,(struct sockaddr*)&addr, sizeof(addr)) < 0)
|
||||
{
|
||||
this->logger->log(this->logger, ERROR, "unable to bind socket to port %d: %s", port, strerror(errno));
|
||||
global_logger_manager->destroy_logger(global_logger_manager, this->logger);
|
||||
allocator_free(this);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return (socket_t*)this;
|
||||
}
|
||||
@@ -0,0 +1,96 @@
|
||||
/**
|
||||
* @file socket.h
|
||||
*
|
||||
* @brief management of sockets
|
||||
*
|
||||
* receiver reads from here, sender writes to here
|
||||
*
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2005 Jan Hutter, Martin Willi
|
||||
* Hochschule fuer Technik Rapperswil
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
||||
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||||
* for more details.
|
||||
*/
|
||||
|
||||
#ifndef SOCKET_H_
|
||||
#define SOCKET_H_
|
||||
|
||||
|
||||
#include <types.h>
|
||||
#include <network/packet.h>
|
||||
|
||||
|
||||
/**
|
||||
* maximum size of a packet
|
||||
* 3000 Bytes should be sufficient, see IKEv2 draft
|
||||
*/
|
||||
#define MAX_PACKET 3000
|
||||
|
||||
|
||||
/**
|
||||
* @brief abstraction of one (ipv4), or in future, of multiple sockets
|
||||
*
|
||||
*/
|
||||
typedef struct socket_s socket_t;
|
||||
struct socket_s {
|
||||
/**
|
||||
* @brief receive a packet
|
||||
*
|
||||
* reads a packet from one of the sockets.
|
||||
* source will be set, dest not implemented
|
||||
*
|
||||
*
|
||||
* @param sock socket_t object to work on
|
||||
* @param packet pinter gets address from allocated packet_t
|
||||
* @return FAILED when unable to receive
|
||||
* SUCCESS when packet successfully received
|
||||
*/
|
||||
status_t (*receive) (socket_t *sock, packet_t **packet);
|
||||
|
||||
/**
|
||||
* @brief send a packet
|
||||
*
|
||||
* sends a packet via desired socket.
|
||||
* uses source and dest in packet.
|
||||
*
|
||||
* @param sock socket_t object to work on
|
||||
* @param packet[out] packet_t to send
|
||||
* @return FAILED when unable to send
|
||||
* SUCCESS when packet successfully sent
|
||||
*/
|
||||
status_t (*send) (socket_t *sock, packet_t *packet);
|
||||
|
||||
/**
|
||||
* @brief destroy sockets
|
||||
*
|
||||
* close sockets and destroy socket_t object
|
||||
*
|
||||
* @param sock socket_t to destroy
|
||||
* @return SUCCESS
|
||||
*/
|
||||
status_t (*destroy) (socket_t *sock);
|
||||
};
|
||||
|
||||
/**
|
||||
* @brief socket_t constructor
|
||||
*
|
||||
* currently creates one socket, listening on all addresses
|
||||
* on port.
|
||||
*
|
||||
* @param port port to bind socket to
|
||||
* @return the created socket, or NULL on error
|
||||
*/
|
||||
socket_t *socket_create(u_int16_t port);
|
||||
|
||||
|
||||
#endif /*SOCKET_H_*/
|
||||
Reference in New Issue
Block a user