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socket.c
386 lines (317 loc) · 8.46 KB
/
socket.c
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#include "stdafx.h"
#include "common.h"
#include "event.h"
#include "fiber.h"
#ifdef SYS_WIN
typedef socket_t (WINAPI *socket_fn)(int, int, int);
typedef int (WINAPI *listen_fn)(socket_t, int);
typedef socket_t (WINAPI *accept_fn)(socket_t, struct sockaddr *, socklen_t *);
typedef int (WINAPI *connect_fn)(socket_t, const struct sockaddr *, socklen_t);
#else
typedef socket_t (*socket_fn)(int, int, int);
typedef int (*listen_fn)(socket_t, int);
typedef socket_t (*accept_fn)(socket_t, struct sockaddr *, socklen_t *);
typedef int (*connect_fn)(socket_t, const struct sockaddr *, socklen_t);
#endif
static socket_fn __sys_socket = NULL;
static listen_fn __sys_listen = NULL;
static accept_fn __sys_accept = NULL;
static connect_fn __sys_connect = NULL;
static void hook_api(void)
{
#ifdef SYS_UNIX
__sys_socket = (socket_fn) dlsym(RTLD_NEXT, "socket");
assert(__sys_socket);
__sys_listen = (listen_fn) dlsym(RTLD_NEXT, "listen");
assert(__sys_listen);
__sys_accept = (accept_fn) dlsym(RTLD_NEXT, "accept");
assert(__sys_accept);
__sys_connect = (connect_fn) dlsym(RTLD_NEXT, "connect");
assert(__sys_connect);
#elif defined(SYS_WIN)
__sys_socket = socket;
__sys_listen = listen;
__sys_accept = accept;
__sys_connect = connect;
#endif
}
static pthread_once_t __once_control = PTHREAD_ONCE_INIT;
static void hook_init(void)
{
if (pthread_once(&__once_control, hook_api) != 0) {
abort();
}
}
/***************************************************************************/
socket_t acl_fiber_socket(int domain, int type, int protocol)
{
socket_t sockfd;
if (__sys_socket == NULL) {
hook_init();
}
if (__sys_socket == NULL) {
return -1;
}
sockfd = __sys_socket(domain, type, protocol);
if (!var_hook_sys_api) {
return sockfd;
}
if (sockfd != INVALID_SOCKET) {
non_blocking(sockfd, NON_BLOCKING);
} else {
fiber_save_errno(acl_fiber_last_error());
}
return sockfd;
}
int acl_fiber_listen(socket_t sockfd, int backlog)
{
if (__sys_listen == NULL) {
hook_init();
}
if (!var_hook_sys_api) {
return __sys_listen ? __sys_listen(sockfd, backlog) : -1;
}
non_blocking(sockfd, NON_BLOCKING);
if (__sys_listen(sockfd, backlog) == 0) {
return 0;
}
fiber_save_errno(acl_fiber_last_error());
return -1;
}
#if FIBER_EAGAIN == FIBER_EWOULDBLOCK
# define error_again(x) ((x) == FIBER_EAGAIN)
#else
# define error_again(x) ((x) == FIBER_EAGAIN || (x) == FIBER_EWOULDBLOCK)
#endif
#define FAST_ACCEPT
socket_t WINAPI acl_fiber_accept(socket_t sockfd, struct sockaddr *addr,
socklen_t *addrlen)
{
FILE_EVENT *fe;
socket_t clifd;
int err;
if (sockfd == INVALID_SOCKET) {
msg_error("%s: invalid sockfd %d", __FUNCTION__, sockfd);
return -1;
}
if (__sys_accept == NULL) {
hook_init();
}
if (!var_hook_sys_api) {
return __sys_accept ?
__sys_accept(sockfd, addr, addrlen) : INVALID_SOCKET;
}
#ifdef FAST_ACCEPT
non_blocking(sockfd, NON_BLOCKING);
clifd = __sys_accept(sockfd, addr, addrlen);
if (clifd != INVALID_SOCKET) {
non_blocking(clifd, NON_BLOCKING);
tcp_nodelay(clifd, 1);
return clifd;
}
//fiber_save_errno();
err = acl_fiber_last_error();
#if FIBER_EAGAIN == FIBER_EWOULDBLOCK
if (err != FIBER_EAGAIN) {
#else
if (err != FIBER_EAGAIN && err != FIBER_EWOULDBLOCK) {
#endif
return INVALID_SOCKET;
}
fe = fiber_file_open(sockfd);
while (1) {
fiber_wait_read(fe);
if (acl_fiber_killed(fe->fiber)) {
msg_info("%s(%d), %s: fiber-%u was killed", __FILE__,
__LINE__, __FUNCTION__, acl_fiber_id(fe->fiber));
return INVALID_SOCKET;
}
#ifdef HAS_IOCP
clifd = fe->iocp_sock;
if (clifd != INVALID_SOCKET) {
int ret;
non_blocking(clifd, NON_BLOCKING);
tcp_nodelay(clifd, 1);
fe->iocp_sock = INVALID_SOCKET;
/* iocp 方式下,需调用下面过程以允许调用
* getpeername/getsockname
*/
ret = setsockopt(clifd, SOL_SOCKET,
SO_UPDATE_ACCEPT_CONTEXT,
(char *)&fe->fd, sizeof(fe->fd));
if (ret == SOCKET_ERROR) {
closesocket(clifd);
continue;
}
return clifd;
}
#endif
clifd = __sys_accept(sockfd, addr, addrlen);
if (clifd != INVALID_SOCKET) {
non_blocking(clifd, NON_BLOCKING);
tcp_nodelay(clifd, 1);
return clifd;
}
err = acl_fiber_last_error();
fiber_save_errno(err);
if (!error_again(err)) {
return INVALID_SOCKET;
}
}
#else
fe = fiber_file_open(sockfd);
while(1) {
if (IS_READABLE(fe)) {
CLR_READABLE(fe);
} else {
fiber_wait_read(fe);
if (acl_fiber_killed(fe->fiber)) {
msg_info("%s(%d), %s: fiber-%u was killed",
__FILE__, __LINE__, __FUNCTION__,
acl_fiber_id(fe->fiber));
return INVALID_SOCKET;
}
}
#ifdef HAS_IOCP
clifd = fe->iocp_sock;
if (clifd != INVALID_SOCKET) {
non_blocking(clifd, NON_BLOCKING);
tcp_nodelay(clifd, 1);
fe->iocp_sock = INVALID_SOCKET;
return clifd;
}
#endif
clifd = __sys_accept(sockfd, addr, addrlen);
if (clifd != INVALID_SOCKET) {
non_blocking(clifd, NON_BLOCKING);
tcp_nodelay(clifd, 1);
return clifd;
}
err = acl_fiber_last_error();
fiber_save_errno(err);
if (!error_again(err)) {
return INVALID_SOCKET;
}
}
#endif
}
int WINAPI acl_fiber_connect(socket_t sockfd, const struct sockaddr *addr,
socklen_t addrlen)
{
int err, ret;
socklen_t len;
FILE_EVENT *fe;
time_t begin, end;
if (__sys_connect == NULL)
hook_init();
if (!var_hook_sys_api) {
return __sys_connect ? __sys_connect(sockfd, addr, addrlen) : -1;
}
non_blocking(sockfd, NON_BLOCKING);
ret = __sys_connect(sockfd, addr, addrlen);
if (ret >= 0) {
tcp_nodelay(sockfd, 1);
return ret;
}
err = acl_fiber_last_error();
fiber_save_errno(err);
#if FIBER_EAGAIN == FIBER_EWOULDBLOCK
if (err != FIBER_EINPROGRESS && err != FIBER_EAGAIN) {
#else
if (err != FIBER_EINPROGRESS && err != FIBER_EAGAIN
&& err != FIBER_EWOULDBLOCK) {
#endif
if (err == FIBER_ECONNREFUSED) {
msg_error("%s(%d), %s: connect ECONNREFUSED",
__FILE__, __LINE__, __FUNCTION__);
} else if (err == FIBER_ECONNRESET) {
msg_error("%s(%d), %s: connect ECONNRESET",
__FILE__, __LINE__, __FUNCTION__);
} else if (err == FIBER_ENETDOWN) {
msg_error("%s(%d), %s: connect ENETDOWN",
__FILE__, __LINE__, __FUNCTION__);
} else if (err == FIBER_ENETUNREACH) {
msg_error("%s(%d), %s: connect ENETUNREACH",
__FILE__, __LINE__, __FUNCTION__);
#ifdef SYS_UNIX
} else if (err == FIBER_EHOSTDOWN) {
msg_error("%s(%d), %s: connect EHOSTDOWN",
__FILE__, __LINE__, __FUNCTION__);
#endif
} else if (err == FIBER_EHOSTUNREACH) {
msg_error("%s(%d), %s: connect EHOSTUNREACH",
__FILE__, __LINE__, __FUNCTION__);
#ifdef ACL_LINUX
/* Linux returns EAGAIN instead of ECONNREFUSED
* for unix sockets if listen queue is full -- see nginx
*/
} else if (err == FIBER_EAGAIN) {
msg_error("%s(%d), %s: connect EAGAIN",
__FILE__, __LINE__, __FUNCTION__);
#endif
} else {
msg_error("%s(%d), %s: connect errno=%d, %s",
__FILE__, __LINE__, __FUNCTION__, err,
last_serror());
}
return -1;
}
fe = fiber_file_open(sockfd);
#ifdef SYS_WIN
fe->status |= STATUS_CONNECTING;
# ifdef HAS_IOCP
memcpy(&fe->peer_addr, addr, addrlen);
# endif
#endif
time(&begin);
fiber_wait_write(fe);
time(&end);
#ifdef SYS_WIN
fe->status &= ~STATUS_CONNECTING;
#endif
if (acl_fiber_killed(fe->fiber)) {
msg_info("%s(%d), %s: fiber-%u was killed, %s, spend %ld",
__FILE__, __LINE__, __FUNCTION__,
acl_fiber_id(fe->fiber), last_serror(),
(long) (end - begin));
return -1;
}
len = sizeof(err);
ret = getsockopt(sockfd, SOL_SOCKET, SO_ERROR, (char *) &err, &len);
if (ret == 0 && err == 0) {
SOCK_ADDR saddr;
struct sockaddr *sa = (struct sockaddr*) &saddr;
socklen_t n = sizeof(saddr);
if (getpeername(sockfd, sa, &n) == 0) {
return 0;
}
fiber_save_errno(acl_fiber_last_error());
msg_error("%s(%d), %s: getpeername error %s, fd: %d, spend %ld",
__FILE__, __LINE__, __FUNCTION__, last_serror(),
sockfd, (long)(end - begin));
return -1;
}
acl_fiber_set_error(err);
msg_error("%s(%d): getsockopt error: %s, ret: %d, err: %d, spend %ld",
__FUNCTION__, __LINE__, last_serror(), ret, err,
(long) (end - begin));
return -1;
}
#ifdef SYS_UNIX
int socket(int domain, int type, int protocol)
{
return acl_fiber_socket(domain, type, protocol);
}
int listen(int sockfd, int backlog)
{
return acl_fiber_listen(sockfd, backlog);
}
int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen)
{
return acl_fiber_accept(sockfd, addr, addrlen);
}
int connect(int sockfd, const struct sockaddr *addr, socklen_t addrlen)
{
return acl_fiber_connect(sockfd, addr, addrlen);
}
#endif