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// Copyright 2007 - 2021, Alan Antonuk and the rabbitmq-c contributors.
// SPDX-License-Identifier: mit
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "amqp_private.h"
#include "rabbitmq-c/tcp_socket.h"
#include <errno.h>
#if ((defined(_WIN32)) || (defined(__MINGW32__)) || (defined(__MINGW64__)))
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <winsock2.h>
#else
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/socket.h>
#endif
#include <stdio.h>
#include <stdlib.h>
struct amqp_tcp_socket_t {
const struct amqp_socket_class_t *klass;
int sockfd;
int internal_error;
int state;
};
static ssize_t amqp_tcp_socket_send(void *base, const void *buf, size_t len,
int flags) {
struct amqp_tcp_socket_t *self = (struct amqp_tcp_socket_t *)base;
ssize_t res;
int flagz = 0;
if (-1 == self->sockfd) {
return AMQP_STATUS_SOCKET_CLOSED;
}
#ifdef MSG_NOSIGNAL
flagz |= MSG_NOSIGNAL;
#endif
#if defined(MSG_MORE)
if (flags & AMQP_SF_MORE) {
flagz |= MSG_MORE;
}
/* Cygwin defines TCP_NOPUSH, but trying to use it will return not
* implemented. Disable it here. */
#elif defined(TCP_NOPUSH) && !defined(__CYGWIN__)
if (flags & AMQP_SF_MORE && !(self->state & AMQP_SF_MORE)) {
int one = 1;
res = setsockopt(self->sockfd, IPPROTO_TCP, TCP_NOPUSH, &one, sizeof(one));
if (0 != res) {
self->internal_error = res;
return AMQP_STATUS_SOCKET_ERROR;
}
self->state |= AMQP_SF_MORE;
} else if (!(flags & AMQP_SF_MORE) && self->state & AMQP_SF_MORE) {
int zero = 0;
res =
setsockopt(self->sockfd, IPPROTO_TCP, TCP_NOPUSH, &zero, sizeof(&zero));
if (0 != res) {
self->internal_error = res;
res = AMQP_STATUS_SOCKET_ERROR;
} else {
self->state &= ~AMQP_SF_MORE;
}
}
#endif
start:
#ifdef _WIN32
res = send(self->sockfd, buf, (int)len, flagz);
#else
res = send(self->sockfd, buf, len, flagz);
#endif
if (res < 0) {
self->internal_error = amqp_os_socket_error();
switch (self->internal_error) {
case EINTR:
goto start;
#ifdef _WIN32
case WSAEWOULDBLOCK:
#else
case EWOULDBLOCK:
#endif
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
case EAGAIN:
#endif
res = AMQP_PRIVATE_STATUS_SOCKET_NEEDWRITE;
break;
default:
res = AMQP_STATUS_SOCKET_ERROR;
}
} else {
self->internal_error = 0;
}
return res;
}
static ssize_t amqp_tcp_socket_recv(void *base, void *buf, size_t len,
int flags) {
struct amqp_tcp_socket_t *self = (struct amqp_tcp_socket_t *)base;
ssize_t ret;
if (-1 == self->sockfd) {
return AMQP_STATUS_SOCKET_CLOSED;
}
start:
#ifdef _WIN32
ret = recv(self->sockfd, buf, (int)len, flags);
#else
ret = recv(self->sockfd, buf, len, flags);
#endif
if (0 > ret) {
self->internal_error = amqp_os_socket_error();
switch (self->internal_error) {
case EINTR:
goto start;
#ifdef _WIN32
case WSAEWOULDBLOCK:
#else
case EWOULDBLOCK:
#endif
#if defined(EAGAIN) && EAGAIN != EWOULDBLOCK
case EAGAIN:
#endif
ret = AMQP_PRIVATE_STATUS_SOCKET_NEEDREAD;
break;
default:
ret = AMQP_STATUS_SOCKET_ERROR;
}
} else if (0 == ret) {
ret = AMQP_STATUS_CONNECTION_CLOSED;
}
return ret;
}
static int amqp_tcp_socket_open(void *base, const char *host, int port,
const struct timeval *timeout) {
struct amqp_tcp_socket_t *self = (struct amqp_tcp_socket_t *)base;
if (-1 != self->sockfd) {
return AMQP_STATUS_SOCKET_INUSE;
}
self->sockfd = amqp_open_socket_noblock(host, port, timeout);
if (0 > self->sockfd) {
int err = self->sockfd;
self->sockfd = -1;
return err;
}
return AMQP_STATUS_OK;
}
static int amqp_tcp_socket_close(void *base,
AMQP_UNUSED amqp_socket_close_enum force) {
struct amqp_tcp_socket_t *self = (struct amqp_tcp_socket_t *)base;
if (-1 == self->sockfd) {
return AMQP_STATUS_SOCKET_CLOSED;
}
if (amqp_os_socket_close(self->sockfd)) {
return AMQP_STATUS_SOCKET_ERROR;
}
self->sockfd = -1;
return AMQP_STATUS_OK;
}
static int amqp_tcp_socket_get_sockfd(void *base) {
struct amqp_tcp_socket_t *self = (struct amqp_tcp_socket_t *)base;
return self->sockfd;
}
static void amqp_tcp_socket_delete(void *base) {
struct amqp_tcp_socket_t *self = (struct amqp_tcp_socket_t *)base;
if (self) {
amqp_tcp_socket_close(self, AMQP_SC_NONE);
free(self);
}
}
static const struct amqp_socket_class_t amqp_tcp_socket_class = {
amqp_tcp_socket_send, /* send */
amqp_tcp_socket_recv, /* recv */
amqp_tcp_socket_open, /* open */
amqp_tcp_socket_close, /* close */
amqp_tcp_socket_get_sockfd, /* get_sockfd */
amqp_tcp_socket_delete /* delete */
};
amqp_socket_t *amqp_tcp_socket_new(amqp_connection_state_t state) {
struct amqp_tcp_socket_t *self = calloc(1, sizeof(*self));
if (!self) {
return NULL;
}
self->klass = &amqp_tcp_socket_class;
self->sockfd = -1;
amqp_set_socket(state, (amqp_socket_t *)self);
return (amqp_socket_t *)self;
}
void amqp_tcp_socket_set_sockfd(amqp_socket_t *base, int sockfd) {
struct amqp_tcp_socket_t *self;
if (base->klass != &amqp_tcp_socket_class) {
amqp_abort("<%p> is not of type amqp_tcp_socket_t", base);
}
self = (struct amqp_tcp_socket_t *)base;
self->sockfd = sockfd;
}
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