7 static memcached_return_t
set_hostinfo(memcached_server_st
*server
)
10 struct addrinfo hints
;
11 char str_port
[NI_MAXSERV
];
14 snprintf(str_port
, NI_MAXSERV
, "%u", (uint32_t)server
->port
);
16 memset(&hints
, 0, sizeof(hints
));
18 // hints.ai_family= AF_INET;
19 if (server
->type
== MEMCACHED_CONNECTION_UDP
)
21 hints
.ai_protocol
= IPPROTO_UDP
;
22 hints
.ai_socktype
= SOCK_DGRAM
;
26 hints
.ai_socktype
= SOCK_STREAM
;
27 hints
.ai_protocol
= IPPROTO_TCP
;
32 int e
= getaddrinfo(server
->hostname
, str_port
, &hints
, &ai
);
38 else if (e
== EAI_AGAIN
)
40 struct timespec dream
, rem
;
45 nanosleep(&dream
, &rem
);
51 WATCHPOINT_STRING(server
->hostname
);
52 WATCHPOINT_STRING(gai_strerror(e
));
53 return MEMCACHED_HOST_LOOKUP_FAILURE
;
57 if (server
->address_info
)
59 freeaddrinfo(server
->address_info
);
60 server
->address_info
= NULL
;
62 server
->address_info
= ai
;
64 return MEMCACHED_SUCCESS
;
67 static memcached_return_t
set_socket_options(memcached_server_st
*ptr
)
69 WATCHPOINT_ASSERT(ptr
->fd
!= -1);
71 if (ptr
->type
== MEMCACHED_CONNECTION_UDP
)
72 return MEMCACHED_SUCCESS
;
75 if (ptr
->root
->snd_timeout
)
78 struct timeval waittime
;
81 waittime
.tv_usec
= ptr
->root
->snd_timeout
;
83 error
= setsockopt(ptr
->fd
, SOL_SOCKET
, SO_SNDTIMEO
,
84 &waittime
, (socklen_t
)sizeof(struct timeval
));
85 WATCHPOINT_ASSERT(error
== 0);
87 return MEMCACHED_FAILURE
;
92 if (ptr
->root
->rcv_timeout
)
95 struct timeval waittime
;
98 waittime
.tv_usec
= ptr
->root
->rcv_timeout
;
100 error
= setsockopt(ptr
->fd
, SOL_SOCKET
, SO_RCVTIMEO
,
101 &waittime
, (socklen_t
)sizeof(struct timeval
));
102 WATCHPOINT_ASSERT(error
== 0);
104 return MEMCACHED_FAILURE
;
108 if (ptr
->root
->flags
.no_block
)
111 struct linger linger
;
114 linger
.l_linger
= 0; /* By default on close() just drop the socket */
115 error
= setsockopt(ptr
->fd
, SOL_SOCKET
, SO_LINGER
,
116 &linger
, (socklen_t
)sizeof(struct linger
));
117 WATCHPOINT_ASSERT(error
== 0);
119 return MEMCACHED_FAILURE
;
122 if (ptr
->root
->flags
.tcp_nodelay
)
127 error
= setsockopt(ptr
->fd
, IPPROTO_TCP
, TCP_NODELAY
,
128 &flag
, (socklen_t
)sizeof(int));
129 WATCHPOINT_ASSERT(error
== 0);
131 return MEMCACHED_FAILURE
;
134 if (ptr
->root
->flags
.tcp_keepalive
)
139 error
= setsockopt(ptr
->fd
, SOL_SOCKET
, SO_KEEPALIVE
,
140 &flag
, (socklen_t
)sizeof(int));
141 WATCHPOINT_ASSERT(error
== 0);
143 return MEMCACHED_FAILURE
;
147 if (ptr
->root
->tcp_keepidle
> 0)
151 error
= setsockopt(ptr
->fd
, IPPROTO_TCP
, TCP_KEEPIDLE
,
152 &ptr
->root
->tcp_keepidle
, (socklen_t
)sizeof(int));
153 WATCHPOINT_ASSERT(error
== 0);
155 return MEMCACHED_FAILURE
;
159 if (ptr
->root
->send_size
> 0)
163 error
= setsockopt(ptr
->fd
, SOL_SOCKET
, SO_SNDBUF
,
164 &ptr
->root
->send_size
, (socklen_t
)sizeof(int));
165 WATCHPOINT_ASSERT(error
== 0);
167 return MEMCACHED_FAILURE
;
170 if (ptr
->root
->recv_size
> 0)
174 error
= setsockopt(ptr
->fd
, SOL_SOCKET
, SO_RCVBUF
,
175 &ptr
->root
->recv_size
, (socklen_t
)sizeof(int));
176 WATCHPOINT_ASSERT(error
== 0);
178 return MEMCACHED_FAILURE
;
181 /* libmemcached will always use nonblocking IO to avoid write deadlocks */
185 flags
= fcntl(ptr
->fd
, F_GETFL
, 0);
186 while (flags
== -1 && (errno
== EINTR
|| errno
== EAGAIN
));
188 unlikely (flags
== -1)
190 return MEMCACHED_CONNECTION_FAILURE
;
192 else if ((flags
& O_NONBLOCK
) == 0)
197 rval
= fcntl(ptr
->fd
, F_SETFL
, flags
| O_NONBLOCK
);
198 while (rval
== -1 && (errno
== EINTR
|| errno
== EAGAIN
));
200 unlikely (rval
== -1)
202 return MEMCACHED_CONNECTION_FAILURE
;
206 return MEMCACHED_SUCCESS
;
209 static memcached_return_t
unix_socket_connect(memcached_server_st
*ptr
)
211 struct sockaddr_un servAddr
;
215 if ((ptr
->fd
= socket(AF_UNIX
, SOCK_STREAM
, 0)) < 0)
217 ptr
->cached_errno
= errno
;
218 return MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE
;
221 memset(&servAddr
, 0, sizeof (struct sockaddr_un
));
222 servAddr
.sun_family
= AF_UNIX
;
223 strcpy(servAddr
.sun_path
, ptr
->hostname
); /* Copy filename */
227 (struct sockaddr
*)&servAddr
,
228 sizeof(servAddr
)) < 0)
236 case EISCONN
: /* We were spinning waiting on connect */
239 WATCHPOINT_ERRNO(errno
);
240 ptr
->cached_errno
= errno
;
241 return MEMCACHED_ERRNO
;
246 WATCHPOINT_ASSERT(ptr
->fd
!= -1);
247 return MEMCACHED_SUCCESS
;
250 static memcached_return_t
network_connect(memcached_server_st
*ptr
)
254 struct addrinfo
*use
;
256 WATCHPOINT_ASSERT(ptr
->cursor_active
== 0);
258 if (! ptr
->options
.sockaddr_inited
||
259 (!(ptr
->root
->flags
.use_cache_lookups
)))
261 memcached_return_t rc
;
263 rc
= set_hostinfo(ptr
);
264 if (rc
!= MEMCACHED_SUCCESS
)
266 ptr
->options
.sockaddr_inited
= true;
269 use
= ptr
->address_info
;
270 /* Create the socket */
273 /* Memcache server does not support IPV6 in udp mode, so skip if not ipv4 */
274 if (ptr
->type
== MEMCACHED_CONNECTION_UDP
&& use
->ai_family
!= AF_INET
)
280 if ((ptr
->fd
= socket(use
->ai_family
,
282 use
->ai_protocol
)) < 0)
284 ptr
->cached_errno
= errno
;
285 WATCHPOINT_ERRNO(errno
);
286 return MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE
;
289 (void)set_socket_options(ptr
);
291 /* connect to server */
292 if ((connect(ptr
->fd
, use
->ai_addr
, use
->ai_addrlen
) == -1))
294 ptr
->cached_errno
= errno
;
295 if (errno
== EINPROGRESS
|| /* nonblocking mode - first return, */
296 errno
== EALREADY
) /* nonblocking mode - subsequent returns */
298 struct pollfd fds
[1];
300 fds
[0].events
= POLLOUT
;
302 int timeout
= ptr
->root
->connect_timeout
;
303 if (ptr
->root
->flags
.no_block
== false)
309 int error
= poll(fds
, 1, timeout
);
318 // A real error occurred and we need to completely bail
320 WATCHPOINT_ERRNO(errno
);
323 #ifdef TARGET_OS_LINUX
329 if (fds
[0].revents
& POLLERR
)
332 socklen_t len
= sizeof (err
);
333 (void)getsockopt(ptr
->fd
, SOL_SOCKET
, SO_ERROR
, &err
, &len
);
334 ptr
->cached_errno
= (err
== 0) ? errno
: err
;
337 (void)close(ptr
->fd
);
345 else if (errno
== EISCONN
) /* we are connected :-) */
349 else if (errno
!= EINTR
)
351 (void)close(ptr
->fd
);
357 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
358 if (ptr
->fd
!= -1 && ptr
->root
->sasl
.callbacks
!= NULL
)
360 memcached_return rc
= memcached_sasl_authenticate_connection(ptr
);
361 if (rc
!= MEMCACHED_SUCCESS
)
363 (void)close(ptr
->fd
);
374 return MEMCACHED_SUCCESS
;
382 WATCHPOINT_STRING("Never got a good file descriptor");
384 /* Failed to connect. schedule next retry */
385 if (ptr
->root
->retry_timeout
)
387 struct timeval next_time
;
389 if (gettimeofday(&next_time
, NULL
) == 0)
390 ptr
->next_retry
= next_time
.tv_sec
+ ptr
->root
->retry_timeout
;
393 if (ptr
->cached_errno
== 0)
394 return MEMCACHED_TIMEOUT
;
396 return MEMCACHED_ERRNO
; /* The last error should be from connect() */
399 return MEMCACHED_SUCCESS
; /* The last error should be from connect() */
402 void set_last_disconnected_host(memcached_server_write_instance_st ptr
)
405 memcached_st
*root
= (memcached_st
*)ptr
->root
;
408 WATCHPOINT_STRING(ptr
->hostname
);
409 WATCHPOINT_NUMBER(ptr
->port
);
410 WATCHPOINT_ERRNO(ptr
->cached_errno
);
412 if (root
->last_disconnected_server
)
413 memcached_server_free(root
->last_disconnected_server
);
414 root
->last_disconnected_server
= memcached_server_clone(NULL
, ptr
);
417 memcached_return_t
memcached_connect(memcached_server_write_instance_st ptr
)
419 memcached_return_t rc
= MEMCACHED_NO_SERVERS
;
420 LIBMEMCACHED_MEMCACHED_CONNECT_START();
422 /* both retry_timeout and server_failure_limit must be set in order to delay retrying a server on error. */
423 WATCHPOINT_ASSERT(ptr
->root
);
424 if (ptr
->root
->retry_timeout
&& ptr
->next_retry
)
426 struct timeval curr_time
;
428 gettimeofday(&curr_time
, NULL
);
430 // We should optimize this to remove the allocation if the server was
431 // the last server to die
432 if (ptr
->next_retry
> curr_time
.tv_sec
)
434 set_last_disconnected_host(ptr
);
436 return MEMCACHED_SERVER_MARKED_DEAD
;
440 // If we are over the counter failure, we just fail. Reject host only
441 // works if you have a set number of failures.
442 if (ptr
->root
->server_failure_limit
&& ptr
->server_failure_counter
>= ptr
->root
->server_failure_limit
)
444 set_last_disconnected_host(ptr
);
446 // @todo fix this by fixing behavior to no longer make use of
448 if (_is_auto_eject_host(ptr
->root
))
450 run_distribution((memcached_st
*)ptr
->root
);
453 return MEMCACHED_SERVER_MARKED_DEAD
;
456 /* We need to clean up the multi startup piece */
459 case MEMCACHED_CONNECTION_UNKNOWN
:
460 WATCHPOINT_ASSERT(0);
461 rc
= MEMCACHED_NOT_SUPPORTED
;
463 case MEMCACHED_CONNECTION_UDP
:
464 case MEMCACHED_CONNECTION_TCP
:
465 rc
= network_connect(ptr
);
467 case MEMCACHED_CONNECTION_UNIX_SOCKET
:
468 rc
= unix_socket_connect(ptr
);
470 case MEMCACHED_CONNECTION_MAX
:
472 WATCHPOINT_ASSERT(0);
475 if (rc
== MEMCACHED_SUCCESS
)
477 ptr
->server_failure_counter
= 0;
482 ptr
->server_failure_counter
++;
484 set_last_disconnected_host(ptr
);
487 LIBMEMCACHED_MEMCACHED_CONNECT_END();