ip.c File Reference

IP module implementation. More...

#include <async.h>
#include <errno.h>
#include <fibril_synch.h>
#include <stdio.h>
#include <str.h>
#include <ipc/services.h>
#include <ipc/net.h>
#include <ipc/nil.h>
#include <ipc/il.h>
#include <ipc/ip.h>
#include <sys/types.h>
#include <byteorder.h>
#include "ip.h"
#include <adt/measured_strings.h>
#include <adt/module_map.h>
#include <packet_client.h>
#include <net/socket_codes.h>
#include <net/in.h>
#include <net/in6.h>
#include <net/inet.h>
#include <net/modules.h>
#include <net/device.h>
#include <net/packet.h>
#include <net/icmp_codes.h>
#include <arp_interface.h>
#include <net_checksum.h>
#include <icmp_client.h>
#include <icmp_remote.h>
#include <ip_client.h>
#include <ip_interface.h>
#include <ip_header.h>
#include <net_interface.h>
#include <nil_remote.h>
#include <tl_remote.h>
#include <packet_remote.h>
#include <il_remote.h>
#include <il_skel.h>

Go to the source code of this file.

Defines
#define	ARP_FILENAME   "/srv/arp"
	ARP module filename.
#define	ARP_NAME   "arp"
	ARP module name.
#define	IP_ADDR   sizeof(struct sockaddr_in6)
	IP packet address length.
#define	IP_MAX_CONTENT   65535
	IP packet maximum content length.
#define	IP_MIN_CONTENT   576
	Minimum IP packet content.
#define	IP_PREFIX   sizeof(ip_header_t)
	IP packet prefix length.
#define	IP_SUFFIX   0
	IP packet suffix length.
#define	IPV4   4
	IP version 4.
#define	IPV4_LOCALHOST_ADDRESS   htonl((127 << 24) + 1)
	The IP localhost address.
#define	NAME   "ip"
	IP module name.
#define	NET_DEFAULT_IP_ROUTING   false
	Default network interface IP routing.
#define	NET_DEFAULT_IPV   IPV4
	Default network interface IP version.
Functions
int	il_initialize (int net_phone)
	Module initialization.
int	il_module_message (ipc_callid_t callid, ipc_call_t *call, ipc_call_t *answer, size_t *answer_count)
	Process the internetwork layer module message.
static int	ip_add_route_req_local (int ip_phone, device_id_t device_id, in_addr_t address, in_addr_t netmask, in_addr_t gateway)
static void	ip_create_last_header (ip_header_t *last, ip_header_t *first)
	Copies the fragment header.
static ip_header_t *	ip_create_middle_header (packet_t *packet, ip_header_t *last)
	Prefixes a middle fragment header based on the last fragment header to the packet.
static int	ip_deliver_local (device_id_t device_id, packet_t *packet, ip_header_t *header, services_t error)
	Delivers the packet to the local host.
static int	ip_device_req_local (int il_phone, device_id_t device_id, services_t netif)
static int	ip_device_state_message (device_id_t device_id, device_state_t state)
	Updates the device state.
static ip_route_t *	ip_find_route (in_addr_t destination)
	Searches all network interfaces if there is a suitable route.
static int	ip_fragment_packet (packet_t *packet, size_t length, size_t prefix, size_t suffix, socklen_t addr_len)
	Checks the packet length and fragments it if needed.
static int	ip_fragment_packet_data (packet_t *packet, packet_t *new_packet, ip_header_t *header, ip_header_t *new_header, size_t length, const struct sockaddr *src, const struct sockaddr *dest, socklen_t addrlen)
	Fragments the packet from the end.
static in_addr_t	ip_get_destination (ip_header_t *header)
	Returns the packet destination address from the IP header.
static int	ip_get_icmp_phone (void)
	Returns the ICMP phone.
static int	ip_get_route_req_local (int ip_phone, ip_protocol_t protocol, const struct sockaddr *destination, socklen_t addrlen, device_id_t *device_id, void **header, size_t *headerlen)
static int	ip_mtu_changed_message (device_id_t device_id, size_t mtu)
	Updates the device content length according to the new MTU value.
static in_addr_t *	ip_netif_address (ip_netif_t *netif)
	Returns the network interface's IP address.
static ip_route_t *	ip_netif_find_route (ip_netif_t *netif, in_addr_t destination)
	Searches the network interfaces if there is a suitable route.
static int	ip_netif_initialize (ip_netif_t *ip_netif)
	Initializes a new network interface specific data.
static int	ip_packet_size_message (device_id_t device_id, size_t *addr_len, size_t *prefix, size_t *content, size_t *suffix)
	Returns the device packet dimensions for sending.
static int	ip_prepare_icmp (packet_t *packet, ip_header_t *header)
	Prepares the ICMP notification packet.
static int	ip_prepare_icmp_and_get_phone (services_t error, packet_t *packet, ip_header_t *header)
	Prepares the ICMP notification packet.
static int	ip_prepare_packet (in_addr_t *source, in_addr_t dest, packet_t *packet, measured_string_t *destination)
	Prepares the outgoing packet or the packet queue.
static int	ip_process_packet (device_id_t device_id, packet_t *packet)
	Processes the received packet.
static int	ip_received_error_msg_local (int ip_phone, device_id_t device_id, packet_t *packet, services_t target, services_t error)
	Notify the IP module about the received error notification packet.
static void	ip_receiver (ipc_callid_t iid, ipc_call_t *icall)
	Process IPC messages from the registered device driver modules.
static int	ip_register (int protocol, services_t service, int phone, tl_received_msg_t received_msg)
	Registers the transport layer protocol.
static int	ip_release_and_return (packet_t *packet, int result)
	Releases the packet and returns the result.
static int	ip_send_msg_local (int il_phone, device_id_t device_id, packet_t *packet, services_t sender, services_t error)
static int	ip_send_route (packet_t *packet, ip_netif_t *netif, ip_route_t *route, in_addr_t *src, in_addr_t dest, services_t error)
	Sends the packet or the packet queue via the specified route.
static int	ip_set_gateway_req_local (int ip_phone, device_id_t device_id, in_addr_t gateway)
static packet_t *	ip_split_packet (packet_t *packet, size_t prefix, size_t content, size_t suffix, socklen_t addr_len, services_t error)
	Checks the packet queue lengths and fragments the packets if needed.
int	main (int argc, char *argv[])
	Main entry point.
Variables
ip_globals_t	ip_globals
	IP global data.

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Detailed Description

IP module implementation.

See also:

arp.h

Definition in file ip.c.

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