platform_pipe.cpp File Reference

#include "config_unix.h"
#include "config_win32.h"
#include "compat/platform_pipe.h"
#include "rtp/net_udp.h"
#include <thread>

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Classes
struct	params

Macros
#define	DECLARE_TIMEOUT(name, init_val_s)
#define	socket_error(...)

Typedefs
typedef void *	sockopt_t

Functions
static fd_t	connect_to_socket (int local_port)
static fd_t	open_socket (int *port)
void	platform_pipe_close (fd_t pipe)
int	platform_pipe_init (fd_t p[2])
static int	system_pipe (fd_t p[2])
	return regular pipe if available if our implementation fails
static void *	worker (void *args)

Detailed Description

Author

Martin Pulec pulec.nosp@m.@ces.nosp@m.net.c.nosp@m.z

Definition in file platform_pipe.cpp.

Macro Definition Documentation

DECLARE_TIMEOUT

#define DECLARE_TIMEOUT	(		name,
			init_val_s )

Value:

struct timeval name = { init_val_s, 0 }

Definition at line 55 of file platform_pipe.cpp.

Referenced by connect_to_socket(), and platform_pipe_init().

socket_error

#define socket_error

(

...

)

Value:

fprintf(stderr, __VA_ARGS__)

Definition at line 60 of file platform_pipe.cpp.

Referenced by connect_to_socket(), control_init(), control_thread(), platform_pipe_init(), send_response(), set_sock_opts_and_bind(), udp_async_wait(), udp_do_recv(), udp_get_recv_buf(), udp_get_udp_rx_port(), udp_host_addr6(), udp_init_if(), udp_join_mcast_grp4(), udp_join_mcast_grp6(), udp_leave_mcast_grp4(), udp_leave_mcast_grp6(), udp_port_pair_is_free(), udp_reader(), and udp_set_buf().

Typedef Documentation

sockopt_t

typedef void* sockopt_t

Definition at line 56 of file platform_pipe.cpp.

Function Documentation

connect_to_socket()

static fd_t connect_to_socket ( int local_port )

static

Definition at line 94 of file platform_pipe.cpp.

{
        struct sockaddr_in s_in;
        memset(&s_in, 0, sizeof(s_in));
        s_in.sin_family = AF_INET;
        s_in.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
        s_in.sin_port = htons(local_port);
        fd_t fd = socket(AF_INET, SOCK_STREAM, 0);
        if (fd == INVALID_SOCKET) {
                return INVALID_SOCKET;
        }
        int ret;
 
        DECLARE_TIMEOUT(timeout, 1);
        DECLARE_TIMEOUT(old_timeout, 0);
        socklen_t old_timeout_len = sizeof old_timeout;
        if (getsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, reinterpret_cast<sockopt_t>(&old_timeout), &old_timeout_len) != 0) {
                socket_error("pipe getsockopt");
        }
        if (setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, reinterpret_cast<sockopt_t>(&timeout), sizeof timeout) != 0) {
                socket_error("pipe setsockopt");
        }
        ret = connect(fd, (struct sockaddr *) &s_in,
                                sizeof(s_in));
        if (ret != 0) {
                socket_error("pipe connect");
                CLOSESOCKET(fd);
                return INVALID_SOCKET;
        }
        if (setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, reinterpret_cast<sockopt_t>(&old_timeout), old_timeout_len) != 0) {
                socket_error("pipe setsockopt");
        }
 
        return fd;
}

References CLOSESOCKET, DECLARE_TIMEOUT, INVALID_SOCKET, and socket_error.

Referenced by worker().

open_socket()

static fd_t open_socket ( int * port )

static

Definition at line 63 of file platform_pipe.cpp.

{
        fd_t sock;
        sock = socket(AF_INET, SOCK_STREAM, 0);
        if (sock == INVALID_SOCKET) {
                return INVALID_SOCKET;
        }
 
        struct sockaddr_in s_in;
        memset(&s_in, 0, sizeof(s_in));
        s_in.sin_family = AF_INET;
        s_in.sin_addr.s_addr = htonl(INADDR_ANY);
        s_in.sin_port = htons(0);
        if (::bind(sock, (const struct sockaddr *) &s_in,
                        sizeof(s_in)) != 0) {
                CLOSESOCKET(sock);
                return INVALID_SOCKET;
        }
        if (listen(sock, 10) != 0) {
                CLOSESOCKET(sock);
                return INVALID_SOCKET;
        }
        socklen_t len = sizeof(s_in);
        if (getsockname(sock, (struct sockaddr *) &s_in, &len) != 0) {
                CLOSESOCKET(sock);
                return INVALID_SOCKET;
        }
        *port = ntohs(s_in.sin_port);
        return sock;
}

References CLOSESOCKET, INVALID_SOCKET, and len.

Referenced by platform_pipe_init().

platform_pipe_close()

void platform_pipe_close

(

fd_t

pipe

)

Definition at line 227 of file platform_pipe.cpp.

{
        CLOSESOCKET(pipe);
#ifdef _WIN32
        WSACleanup();
#endif
}

References CLOSESOCKET.

Referenced by state_root::~state_root(), control_done(), control_thread(), udp_exit(), udp_reader(), and ug_control_connection_done().

platform_pipe_init()

int platform_pipe_init

(

fd_t

p[2]

)

Definition at line 155 of file platform_pipe.cpp.

{
#ifdef _WIN32
        // This needs to be called twice, indeed, since WSACleanup will be run
        // on both ends. This call is also required because not all pipes are
        // destroyed before common_cleanup which calls WSACleanup
        WSADATA wsaData;
        int err = WSAStartup(MAKEWORD(2, 2), &wsaData);
        if (err != 0) {
                fprintf(stderr, "WSAStartup failed with error %d.", err);
                return -1;
        }
        if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {
                fprintf(stderr, "Counld not found usable version of Winsock.\n");
                WSACleanup();
                return -1;
        }
        err = WSAStartup(MAKEWORD(2, 2), &wsaData);
        if (err != 0) {
                fprintf(stderr, "WSAStartup failed with error %d.", err);
                WSACleanup();
                return -1;
        }
        if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {
                fprintf(stderr, "Counld not found usable version of Winsock.\n");
                WSACleanup();
                WSACleanup();
                return -1;
        }
#endif
 
        struct params par{};
        fd_t sock = open_socket(&par.port);
        if (sock == INVALID_SOCKET) {
                perror("open_socket");
                return system_pipe(p);
        }
 
        DECLARE_TIMEOUT(timeout, 1);
        DECLARE_TIMEOUT(old_timeout, 0);
        socklen_t old_timeout_len = sizeof old_timeout;
        if (getsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, reinterpret_cast<sockopt_t>(&old_timeout), &old_timeout_len) != 0) {
                socket_error("pipe getsockopt");
        }
        if (setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, reinterpret_cast<sockopt_t>(&timeout), sizeof timeout) != 0) {
                socket_error("pipe setsockopt");
        }
 
        thread thr(worker, &par);
 
        p[0] = accept(sock, NULL, NULL);
        if (p[0] == INVALID_SOCKET) {
                perror("pipe accept");
                thr.join();
                CLOSESOCKET(sock);
                return system_pipe(p);
        }
        thr.join();
        if (setsockopt(p[0], SOL_SOCKET, SO_RCVTIMEO, reinterpret_cast<sockopt_t>(&old_timeout), old_timeout_len) != 0) {
                socket_error("pipe setsockopt");
        }
        p[1] = par.sock;
        if (p[1] == INVALID_SOCKET) {
                CLOSESOCKET(sock);
                perror("accept");
                return system_pipe(p);
        }
        CLOSESOCKET(sock);
 
        return 0;
}

References CLOSESOCKET, DECLARE_TIMEOUT, INVALID_SOCKET, open_socket(), params::port, params::sock, socket_error, system_pipe(), and worker().

Referenced by state_root::state_root(), control_start(), udp_init_if(), and ug_control_connection_init().

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system_pipe()

static int system_pipe ( fd_t p[2] )

static

return regular pipe if available if our implementation fails

Definition at line 144 of file platform_pipe.cpp.

{
#ifdef _WIN32
        (void) p;
        return -1;
#else
        fprintf(stderr, "Using native pipe instead of custom implementaton.\n");
        return pipe(p);
#endif
}

Referenced by platform_pipe_init().

worker()

static void * worker ( void * args )

static

Definition at line 135 of file platform_pipe.cpp.

{
        struct params *p = (struct params *) args;
        p->sock = connect_to_socket(p->port);
 
        return NULL;
}

References connect_to_socket(), params::port, and params::sock.

Referenced by platform_pipe_init().

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