stream.c File Reference

Osmocom stream socket helpers. More...

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <time.h>
#include <sys/fcntl.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <osmocom/core/timer.h>
#include <osmocom/core/select.h>
#include <osmocom/core/utils.h>
#include <osmocom/gsm/tlv.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/logging.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/socket.h>
#include <osmocom/netif/stream.h>
#include "config.h"
#include <netinet/sctp.h>

Data Structures
struct	osmo_stream_cli
struct	osmo_stream_srv_link
struct	osmo_stream_srv

Macros
#define	LOGSCLI(cli, level, fmt, args...)   LOGP(DLINP, level, "[%s] %s(): " fmt, get_value_string(stream_cli_state_names, (cli)->state), __func__, ## args)
#define	MSG_NOSIGNAL   0
#define	OSMO_STREAM_CLI_F_RECONF   (1 << 0)
#define	OSMO_STREAM_CLI_F_NODELAY   (1 << 1)
#define	OSMO_STREAM_MAX_ADDRS   OSMO_SOCK_MAX_ADDRS
#define	OSMO_STREAM_SRV_F_RECONF   (1 << 0)
#define	OSMO_STREAM_SRV_F_NODELAY   (1 << 1)
#define	OSMO_STREAM_SRV_F_FLUSH_DESTROY   (1 << 0)

Enumerations
enum	osmo_stream_cli_state {   STREAM_CLI_STATE_CLOSED, STREAM_CLI_STATE_WAIT_RECONNECT, STREAM_CLI_STATE_CONNECTING, STREAM_CLI_STATE_CONNECTED,   STREAM_CLI_STATE_MAX }

Functions
static int	byte_nonzero (const uint8_t *u8, unsigned int offset, unsigned int u8_size)
static int	determine_sctp_sockopt_event_subscribe_size (void)
static int	sctp_setsockopt_events_linux_workaround (int fd, const struct sctp_event_subscribe *event)
static int	sctp_sock_activate_events (int fd)
static int	setsockopt_nodelay (int fd, int proto, int on)
void	osmo_stream_cli_close (struct osmo_stream_cli *cli)
	Close an Osmocom Stream Client. More...
void	osmo_stream_cli_reconnect (struct osmo_stream_cli *cli)
	Re-connect an Osmocom Stream Client If re-connection is enabled for this client (which is the case unless negative timeout was explicitly set via osmo_stream_cli_set_reconnect_timeout() call), we close any existing connection (if any) and schedule a re-connect timer.
bool	osmo_stream_cli_is_connected (struct osmo_stream_cli *cli)
	Check if Osmocom Stream Client is in connected state. More...
static void	osmo_stream_cli_read (struct osmo_stream_cli *cli)
static int	osmo_stream_cli_write (struct osmo_stream_cli *cli)
static int	osmo_stream_cli_fd_cb (struct osmo_fd *ofd, unsigned int what)
static void	cli_timer_cb (void *data)
struct osmo_stream_cli *	osmo_stream_cli_create (void *ctx)
	Create an Osmocom stream client. More...
void	osmo_stream_cli_set_addr (struct osmo_stream_cli *cli, const char *addr)
	Set the remote address to which we connect. More...
int	osmo_stream_cli_set_addrs (struct osmo_stream_cli *cli, const char **addr, size_t addrcnt)
	Set the remote address set to which we connect. Useful for protocols allowing connecting to more than one address (such as SCTP) More...
void	osmo_stream_cli_set_port (struct osmo_stream_cli *cli, uint16_t port)
	Set the remote port number to which we connect. More...
void	osmo_stream_cli_set_local_port (struct osmo_stream_cli *cli, uint16_t port)
	Set the local port number for the socket (to be bound to) More...
void	osmo_stream_cli_set_local_addr (struct osmo_stream_cli *cli, const char *addr)
	Set the local address for the socket (to be bound to) More...
int	osmo_stream_cli_set_local_addrs (struct osmo_stream_cli *cli, const char **addr, size_t addrcnt)
	Set the local address set to which we connect. Useful for protocols allowing bind to more than one address (such as SCTP) More...
void	osmo_stream_cli_set_proto (struct osmo_stream_cli *cli, uint16_t proto)
	Set the protocol for the stream client socket. More...
void	osmo_stream_cli_set_reconnect_timeout (struct osmo_stream_cli *cli, int timeout)
	Set the reconnect time of the stream client socket. More...
void	osmo_stream_cli_set_data (struct osmo_stream_cli *cli, void *data)
	Set application private data of the stream client socket. More...
void *	osmo_stream_cli_get_data (struct osmo_stream_cli *cli)
	Get application private data of the stream client socket. More...
char *	osmo_stream_cli_get_sockname (const struct osmo_stream_cli *cli)
	Get the stream client socket description. More...
struct osmo_fd *	osmo_stream_cli_get_ofd (struct osmo_stream_cli *cli)
	Get Osmocom File Descriptor of the stream client socket. More...
void	osmo_stream_cli_set_connect_cb (struct osmo_stream_cli *cli, int(*connect_cb)(struct osmo_stream_cli *cli))
	Set the call-back function called on connect of the stream client socket. More...
void	osmo_stream_cli_set_disconnect_cb (struct osmo_stream_cli *cli, int(*disconnect_cb)(struct osmo_stream_cli *cli))
	Set the call-back function called on disconnect of the stream client socket. More...
void	osmo_stream_cli_set_read_cb (struct osmo_stream_cli *cli, int(*read_cb)(struct osmo_stream_cli *cli))
	Set the call-back function called to read from the stream client socket. More...
void	osmo_stream_cli_destroy (struct osmo_stream_cli *cli)
	Destroy a Osmocom stream client (includes close) More...
int	osmo_stream_cli_open2 (struct osmo_stream_cli *cli, int reconnect)
	DEPRECATED: use osmo_stream_cli_set_reconnect_timeout() or osmo_stream_cli_reconnect() instead! Open connection of an Osmocom stream client. More...
void	osmo_stream_cli_set_nodelay (struct osmo_stream_cli *cli, bool nodelay)
	Set the NODELAY socket option to avoid Nagle-like behavior Setting this to nodelay=true will automatically set the NODELAY socket option on any socket established via osmo_stream_cli_open or any re-connect. You have to set this before opening the socket. More...
int	osmo_stream_cli_open (struct osmo_stream_cli *cli)
	Open connection of an Osmocom stream client By default the client will automatically reconnect after default timeout. To disable this, use osmo_stream_cli_set_reconnect_timeout() before calling this function. More...
void	osmo_stream_cli_send (struct osmo_stream_cli *cli, struct msgb *msg)
	Enqueue data to be sent via an Osmocom stream client. More...
int	osmo_stream_cli_recv (struct osmo_stream_cli *cli, struct msgb *msg)
	Receive data via an Osmocom stream client. More...
static int	osmo_stream_srv_fd_cb (struct osmo_fd *ofd, unsigned int what)
struct osmo_stream_srv_link *	osmo_stream_srv_link_create (void *ctx)
	Create an Osmocom Stream Server Link A Stream Server Link is the listen()+accept() "parent" to individual Stream Servers. More...
void	osmo_stream_srv_link_set_nodelay (struct osmo_stream_srv_link *link, bool nodelay)
	Set the NODELAY socket option to avoid Nagle-like behavior Setting this to nodelay=true will automatically set the NODELAY socket option on any socket established via this server link, before calling the accept_cb() More...
void	osmo_stream_srv_link_set_addr (struct osmo_stream_srv_link *link, const char *addr)
	Set the local address to which we bind. More...
int	osmo_stream_srv_link_set_addrs (struct osmo_stream_srv_link *link, const char **addr, size_t addrcnt)
	Set the local address set to which we bind. Useful for protocols allowing bind on more than one address (such as SCTP) More...
void	osmo_stream_srv_link_set_port (struct osmo_stream_srv_link *link, uint16_t port)
	Set the local port number to which we bind. More...
void	osmo_stream_srv_link_set_proto (struct osmo_stream_srv_link *link, uint16_t proto)
	Set the protocol for the stream server link. More...
void	osmo_stream_srv_link_set_data (struct osmo_stream_srv_link *link, void *data)
	Set application private data of the stream server link. More...
void *	osmo_stream_srv_link_get_data (struct osmo_stream_srv_link *link)
	Get application private data of the stream server link. More...
char *	osmo_stream_srv_link_get_sockname (const struct osmo_stream_srv_link *link)
	Get description of the stream server link e. g. 127.0.0.1:1234. More...
struct osmo_fd *	osmo_stream_srv_link_get_ofd (struct osmo_stream_srv_link *link)
	Get Osmocom File Descriptor of the stream server link. More...
void	osmo_stream_srv_link_set_accept_cb (struct osmo_stream_srv_link *link, int(*accept_cb)(struct osmo_stream_srv_link *link, int fd))
	Set the accept() call-back of the stream server link. More...
void	osmo_stream_srv_link_destroy (struct osmo_stream_srv_link *link)
	Destroy the stream server link. Closes + Releases Memory. More...
int	osmo_stream_srv_link_open (struct osmo_stream_srv_link *link)
	Open the stream server link. This actually initializes the underlying socket and binds it to the configured ip/port. More...
void	osmo_stream_srv_link_close (struct osmo_stream_srv_link *link)
	Close the stream server link and unregister from select loop Does not destroy the server link, merely closes it! More...
static int	osmo_stream_srv_read (struct osmo_stream_srv *conn)
static void	osmo_stream_srv_write (struct osmo_stream_srv *conn)
static int	osmo_stream_srv_cb (struct osmo_fd *ofd, unsigned int what)
struct osmo_stream_srv *	osmo_stream_srv_create (void *ctx, struct osmo_stream_srv_link *link, int fd, int(*cb)(struct osmo_stream_srv *conn), int(*closed_cb)(struct osmo_stream_srv *conn), void *data)
	Create a Stream Server inside the specified link. More...
void	osmo_stream_srv_set_flush_and_destroy (struct osmo_stream_srv *conn)
	Prepare to send out all pending messages on the connection's Tx queue and then automatically destroy the stream with osmo_stream_srv_destroy(). This function disables queuing of new messages on the connection and also disables reception of new messages on the connection. More...
void	osmo_stream_srv_set_data (struct osmo_stream_srv *conn, void *data)
	Set application private data of the stream server. More...
void *	osmo_stream_srv_get_data (struct osmo_stream_srv *conn)
	Get application private data of the stream server. More...
struct osmo_fd *	osmo_stream_srv_get_ofd (struct osmo_stream_srv *conn)
	Get Osmocom File Descriptor of the stream server. More...
struct osmo_stream_srv_link *	osmo_stream_srv_get_master (struct osmo_stream_srv *conn)
	Get the master (Link) from a Stream Server. More...
void	osmo_stream_srv_destroy (struct osmo_stream_srv *conn)
	Destroy given Stream Server This function closes the Stream Server socket, unregisters from select loop, invokes the connection's closed_cb() callback to allow API users to clean up any associated state they have for this connection, and then de-allocates associated memory. More...
void	osmo_stream_srv_send (struct osmo_stream_srv *conn, struct msgb *msg)
	Enqueue data to be sent via an Osmocom stream server. More...
int	osmo_stream_srv_recv (struct osmo_stream_srv *conn, struct msgb *msg)
	Receive data via Osmocom stream server. More...

Variables
static int	sctp_sockopt_event_subscribe_size = 0
static const struct value_string	stream_cli_state_names []

Detailed Description

Osmocom stream socket helpers.