gprs_ns_frgre.c File Reference

NS-over-FR-over-GRE implementation. More...

#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <osmocom/core/select.h>
#include <osmocom/core/byteswap.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/socket.h>
#include <osmocom/gprs/gprs_ns.h>
#include "common_vty.h"

Data Structures
struct	gre_hdr

Macros
#define	GRE_PTYPE_FR   0x6559
#define	GRE_PTYPE_IPv4   0x0800
#define	GRE_PTYPE_KAR   0x0000 /* keepalive response */
#define	IPPROTO_GRE   47

Functions
struct gre_hdr	__attribute__ ((packed))
static int	handle_rx_gre_ipv4 (struct osmo_fd *bfd, struct msgb *msg, struct iphdr *iph, struct gre_hdr *greh)
static struct msgb *	read_nsfrgre_msg (struct osmo_fd *bfd, int *error, struct sockaddr_in *saddr)
int	gprs_ns_rcvmsg (struct gprs_ns_inst *nsi, struct msgb *msg, struct sockaddr_in *saddr, enum gprs_ns_ll ll)
	Receive incoming NS message from underlying transport layer. More...
static int	handle_nsfrgre_read (struct osmo_fd *bfd)
static int	handle_nsfrgre_write (struct osmo_fd *bfd)
int	gprs_ns_frgre_sendmsg (struct gprs_nsvc *nsvc, struct msgb *msg)
static int	nsfrgre_fd_cb (struct osmo_fd *bfd, unsigned int what)
int	gprs_ns_frgre_listen (struct gprs_ns_inst *nsi)

Variables
uint16_t	flags
uint16_t	ptype

Detailed Description

NS-over-FR-over-GRE implementation.

GPRS Networks Service (NS) messages on the Gb interface, 3GPP TS 08.16 version 8.0.1 Release 1999 / ETSI TS 101 299 V8.0.1 (2002-05).

Macro Definition Documentation

GRE_PTYPE_FR

#define GRE_PTYPE_FR   0x6559

GRE_PTYPE_IPv4

#define GRE_PTYPE_IPv4   0x0800

GRE_PTYPE_KAR

#define GRE_PTYPE_KAR   0x0000 /* keepalive response */

IPPROTO_GRE

#define IPPROTO_GRE   47

Function Documentation

gprs_ns_frgre_listen()

int gprs_ns_frgre_listen

(

struct gprs_ns_inst *

nsi

)

References osmo_fd::cb, osmo_fd::data, DNS, gprs_ns_inst::enabled, osmo_fd::fd, gprs_ns_inst::fd, gprs_ns_inst::frgre, IPPROTO_GRE, gprs_ns_inst::local_ip, LOGL_ERROR, LOGP, nsfrgre_fd_cb(), osmo_htonl, OSMO_SOCK_F_BIND, and osmo_sock_init_ofd().

gprs_ns_frgre_sendmsg()

int gprs_ns_frgre_sendmsg	(	struct gprs_nsvc *	nsvc,
		struct msgb *	msg
	)

References gprs_nsvc::bts_addr, osmo_fd::fd, gprs_ns_inst::fd, gre_hdr::flags, gprs_ns_inst::frgre, gprs_nsvc::frgre, GRE_PTYPE_FR, IPPROTO_GRE, msg, msgb_free(), msgb_push(), gprs_nsvc::nsi, osmo_htons, osmo_ntohs, and gre_hdr::ptype.

Referenced by gprs_ns_tx().

handle_nsfrgre_read()

static int handle_nsfrgre_read ( struct osmo_fd *  bfd )

static

References osmo_fd::data, DNS, GPRS_NS_LL_FR_GRE, gprs_ns_rcvmsg(), LOGL_INFO, LOGP, msg, msgb_free(), osmo_ntohs, and read_nsfrgre_msg().

Referenced by nsfrgre_fd_cb().

handle_nsfrgre_write()

static int handle_nsfrgre_write ( struct osmo_fd *  bfd )

static

Referenced by nsfrgre_fd_cb().

handle_rx_gre_ipv4()

static int handle_rx_gre_ipv4 ( struct osmo_fd *  bfd, struct msgb *  msg, struct iphdr *  iph, struct gre_hdr *  greh  )

static

References osmo_fd::data, DNS, osmo_fd::fd, gprs_ns_inst::fd, gprs_ns_inst::frgre, GRE_PTYPE_KAR, IPPROTO_GRE, LOGL_DEBUG, LOGL_ERROR, LOGP, msg, osmo_htons, and gre_hdr::ptype.

Referenced by read_nsfrgre_msg().

nsfrgre_fd_cb()

static int nsfrgre_fd_cb ( struct osmo_fd *  bfd, unsigned int  what  )

static

References handle_nsfrgre_read(), handle_nsfrgre_write(), OSMO_FD_READ, and OSMO_FD_WRITE.

Referenced by gprs_ns_frgre_listen().

read_nsfrgre_msg()

static struct msgb * read_nsfrgre_msg ( struct osmo_fd *  bfd, int *  error, struct sockaddr_in *  saddr  )

static

References DNS, osmo_fd::fd, gre_hdr::flags, GRE_PTYPE_FR, GRE_PTYPE_IPv4, handle_rx_gre_ipv4(), if(), LOGL_ERROR, LOGL_NOTICE, LOGP, msg, msgb_alloc(), msgb_free(), msgb_put(), NS_ALLOC_SIZE, osmo_htons, osmo_ntohs, and gre_hdr::ptype.

Referenced by handle_nsfrgre_read().

Variable Documentation

flags

uint16_t flags

ptype

uint16_t ptype