alias_skinny.c File Reference

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/libalias/alias_local.h>
#include <netinet/libalias/alias_mod.h>

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Data Structures
struct	skinny_header
struct	RegisterMessage
struct	IpPortMessage
struct	OpenReceiveChannelAck
struct	StartMediaTransmission

Macros
#define	REG_MSG   0x00000001
#define	IP_PORT_MSG   0x00000002
#define	OPNRCVCH_ACK   0x00000022
#define	START_MEDIATX   0x0000008a

Enumerations
enum	ConvDirection { ClientToServer = 0 , ServerToClient = 1 }

Functions
static void	AliasHandleSkinny (struct libalias *, struct ip *, struct alias_link *)
static int	fingerprint (struct libalias *la, struct alias_data *ah)
static int	protohandler (struct libalias *la, struct ip *pip, struct alias_data *ah)
static int	mod_handler (module_t mod, int type, void *data)
	DECLARE_MODULE (alias_skinny, alias_mod, SI_SUB_DRIVERS, SI_ORDER_SECOND)
	MODULE_VERSION (alias_skinny, 1)
	MODULE_DEPEND (alias_skinny, libalias, 1, 1, 1)
static int	alias_skinny_reg_msg (struct RegisterMessage *reg_msg, struct ip *pip, struct tcphdr *tc, struct alias_link *lnk, ConvDirection direction)
static int	alias_skinny_startmedia (struct StartMediaTransmission *start_media, struct ip *pip, struct tcphdr *tc, struct alias_link *lnk, u_int32_t localIpAddr, ConvDirection direction)
static int	alias_skinny_port_msg (struct IpPortMessage *port_msg, struct ip *pip, struct tcphdr *tc, struct alias_link *lnk, ConvDirection direction)
static int	alias_skinny_opnrcvch_ack (struct libalias *la, struct OpenReceiveChannelAck *opnrcvch_ack, struct ip *pip, struct tcphdr *tc, struct alias_link *lnk, u_int32_t *localIpAddr, ConvDirection direction)

Variables
struct proto_handler	handlers []
static moduledata_t	alias_mod

Macro Definition Documentation

IP_PORT_MSG

#define IP_PORT_MSG   0x00000002

Definition at line 155 of file alias_skinny.c.

OPNRCVCH_ACK

#define OPNRCVCH_ACK   0x00000022

Definition at line 156 of file alias_skinny.c.

REG_MSG

#define REG_MSG   0x00000001

Definition at line 154 of file alias_skinny.c.

START_MEDIATX

#define START_MEDIATX   0x0000008a

Definition at line 157 of file alias_skinny.c.

Enumeration Type Documentation

ConvDirection

enum ConvDirection

Enumerator
ClientToServer
ServerToClient

Definition at line 203 of file alias_skinny.c.

Function Documentation

alias_skinny_opnrcvch_ack()

static int alias_skinny_opnrcvch_ack ( struct libalias *  la, struct OpenReceiveChannelAck *  opnrcvch_ack, struct ip *  pip, struct tcphdr *  tc, struct alias_link *  lnk, u_int32_t *  localIpAddr, ConvDirection  direction  )

static

Definition at line 270 of file alias_skinny.c.

References FindUdpTcpOut(), GetAliasAddress(), GetAliasPort(), INADDR_ANY, OpenReceiveChannelAck::ipAddr, IPPROTO_UDP, alias_link::la, OpenReceiveChannelAck::port, and in_addr::s_addr.

Referenced by AliasHandleSkinny().

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alias_skinny_port_msg()

static int alias_skinny_port_msg ( struct IpPortMessage *  port_msg, struct ip *  pip, struct tcphdr *  tc, struct alias_link *  lnk, ConvDirection  direction  )

static

Definition at line 252 of file alias_skinny.c.

References GetAliasPort(), and IpPortMessage::stationIpPort.

Referenced by AliasHandleSkinny().

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alias_skinny_reg_msg()

static int alias_skinny_reg_msg ( struct RegisterMessage *  reg_msg, struct ip *  pip, struct tcphdr *  tc, struct alias_link *  lnk, ConvDirection  direction  )

static

Definition at line 209 of file alias_skinny.c.

References GetAliasAddress(), RegisterMessage::ipAddr, and in_addr::s_addr.

Referenced by AliasHandleSkinny().

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alias_skinny_startmedia()

static int alias_skinny_startmedia ( struct StartMediaTransmission *  start_media, struct ip *  pip, struct tcphdr *  tc, struct alias_link *  lnk, u_int32_t  localIpAddr, ConvDirection  direction  )

static

Definition at line 228 of file alias_skinny.c.

References StartMediaTransmission::remoteIpAddr, and in_addr::s_addr.

Referenced by AliasHandleSkinny().

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AliasHandleSkinny()

static void AliasHandleSkinny ( struct libalias *  la, struct ip *  pip, struct alias_link *  lnk  )

static

Definition at line 302 of file alias_skinny.c.

References alias_skinny_opnrcvch_ack(), alias_skinny_port_msg(), alias_skinny_reg_msg(), alias_skinny_startmedia(), ClientToServer, ip::ip_hl, ip::ip_len, IP_PORT_MSG, skinny_header::len, skinny_header::msgId, StartMediaTransmission::msgId, OPNRCVCH_ACK, REG_MSG, ServerToClient, libalias::skinnyPort, and START_MEDIATX.

Referenced by protohandler().

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DECLARE_MODULE()

DECLARE_MODULE	(	alias_skinny	,
		alias_mod	,
		SI_SUB_DRIVERS	,
		SI_ORDER_SECOND
	)

fingerprint()

static int fingerprint ( struct libalias *  la, struct alias_data *  ah  )

static

Definition at line 62 of file alias_skinny.c.

References alias_data::dport, alias_data::lnk, libalias::skinnyPort, and alias_data::sport.

mod_handler()

static int mod_handler ( module_t  mod, int  type, void *  data  )

static

Definition at line 91 of file alias_skinny.c.

References handlers, LibAliasAttachHandlers(), and LibAliasDetachHandlers().

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MODULE_DEPEND()

MODULE_DEPEND	(	alias_skinny	,
		libalias	,
		1	,
		1	,
		1
	)

MODULE_VERSION()

MODULE_VERSION	(	alias_skinny	,
		1
	)

protohandler()

static int protohandler ( struct libalias *  la, struct ip *  pip, struct alias_data *  ah  )

static

Definition at line 73 of file alias_skinny.c.

References AliasHandleSkinny(), and alias_data::lnk.

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Variable Documentation

alias_mod

moduledata_t alias_mod

static

Initial value:

= {
       "alias_skinny", mod_handler, NULL
}

Definition at line 113 of file alias_skinny.c.

handlers

struct proto_handler handlers[]

Initial value:

= {
        {
          .pri = 110,
          .dir = IN|OUT,
          .proto = TCP,
          .fingerprint = &fingerprint,
          .protohandler = &protohandler
        },
        { EOH }
}

Definition at line 79 of file alias_skinny.c.

Referenced by mod_handler().