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
;
111 int error
= setsockopt(ptr
->fd
, SOL_SOCKET
, SO_NOSIGPIPE
, (void *)&set
, sizeof(int));
113 // This is not considered a fatal error
116 WATCHPOINT_ERRNO(errno
);
117 perror("setsockopt(SO_NOSIGPIPE)");
121 if (ptr
->root
->flags
.no_block
)
124 struct linger linger
;
127 linger
.l_linger
= 0; /* By default on close() just drop the socket */
128 error
= setsockopt(ptr
->fd
, SOL_SOCKET
, SO_LINGER
,
129 &linger
, (socklen_t
)sizeof(struct linger
));
130 WATCHPOINT_ASSERT(error
== 0);
132 return MEMCACHED_FAILURE
;
135 if (ptr
->root
->flags
.tcp_nodelay
)
140 error
= setsockopt(ptr
->fd
, IPPROTO_TCP
, TCP_NODELAY
,
141 &flag
, (socklen_t
)sizeof(int));
142 WATCHPOINT_ASSERT(error
== 0);
144 return MEMCACHED_FAILURE
;
147 if (ptr
->root
->flags
.tcp_keepalive
)
152 error
= setsockopt(ptr
->fd
, SOL_SOCKET
, SO_KEEPALIVE
,
153 &flag
, (socklen_t
)sizeof(int));
154 WATCHPOINT_ASSERT(error
== 0);
156 return MEMCACHED_FAILURE
;
160 if (ptr
->root
->tcp_keepidle
> 0)
164 error
= setsockopt(ptr
->fd
, IPPROTO_TCP
, TCP_KEEPIDLE
,
165 &ptr
->root
->tcp_keepidle
, (socklen_t
)sizeof(int));
166 WATCHPOINT_ASSERT(error
== 0);
168 return MEMCACHED_FAILURE
;
172 if (ptr
->root
->send_size
> 0)
176 error
= setsockopt(ptr
->fd
, SOL_SOCKET
, SO_SNDBUF
,
177 &ptr
->root
->send_size
, (socklen_t
)sizeof(int));
178 WATCHPOINT_ASSERT(error
== 0);
180 return MEMCACHED_FAILURE
;
183 if (ptr
->root
->recv_size
> 0)
187 error
= setsockopt(ptr
->fd
, SOL_SOCKET
, SO_RCVBUF
,
188 &ptr
->root
->recv_size
, (socklen_t
)sizeof(int));
189 WATCHPOINT_ASSERT(error
== 0);
191 return MEMCACHED_FAILURE
;
194 /* libmemcached will always use nonblocking IO to avoid write deadlocks */
198 flags
= fcntl(ptr
->fd
, F_GETFL
, 0);
199 while (flags
== -1 && (errno
== EINTR
|| errno
== EAGAIN
));
201 unlikely (flags
== -1)
203 return MEMCACHED_CONNECTION_FAILURE
;
205 else if ((flags
& O_NONBLOCK
) == 0)
210 rval
= fcntl(ptr
->fd
, F_SETFL
, flags
| O_NONBLOCK
);
211 while (rval
== -1 && (errno
== EINTR
|| errno
== EAGAIN
));
213 unlikely (rval
== -1)
215 return MEMCACHED_CONNECTION_FAILURE
;
219 return MEMCACHED_SUCCESS
;
222 static memcached_return_t
unix_socket_connect(memcached_server_st
*ptr
)
224 struct sockaddr_un servAddr
;
228 if ((ptr
->fd
= socket(AF_UNIX
, SOCK_STREAM
, 0)) < 0)
230 ptr
->cached_errno
= errno
;
231 return MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE
;
234 memset(&servAddr
, 0, sizeof (struct sockaddr_un
));
235 servAddr
.sun_family
= AF_UNIX
;
236 strcpy(servAddr
.sun_path
, ptr
->hostname
); /* Copy filename */
240 (struct sockaddr
*)&servAddr
,
241 sizeof(servAddr
)) < 0)
249 case EISCONN
: /* We were spinning waiting on connect */
252 WATCHPOINT_ERRNO(errno
);
253 ptr
->cached_errno
= errno
;
254 return MEMCACHED_ERRNO
;
259 WATCHPOINT_ASSERT(ptr
->fd
!= -1);
261 return MEMCACHED_SUCCESS
;
264 static memcached_return_t
network_connect(memcached_server_st
*ptr
)
268 struct addrinfo
*use
;
270 WATCHPOINT_ASSERT(ptr
->cursor_active
== 0);
272 if (! ptr
->options
.sockaddr_inited
||
273 (!(ptr
->root
->flags
.use_cache_lookups
)))
275 memcached_return_t rc
;
277 rc
= set_hostinfo(ptr
);
278 if (rc
!= MEMCACHED_SUCCESS
)
280 ptr
->options
.sockaddr_inited
= true;
283 use
= ptr
->address_info
;
284 /* Create the socket */
287 /* Memcache server does not support IPV6 in udp mode, so skip if not ipv4 */
288 if (ptr
->type
== MEMCACHED_CONNECTION_UDP
&& use
->ai_family
!= AF_INET
)
294 if ((ptr
->fd
= socket(use
->ai_family
,
296 use
->ai_protocol
)) < 0)
298 ptr
->cached_errno
= errno
;
299 WATCHPOINT_ERRNO(errno
);
300 return MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE
;
303 (void)set_socket_options(ptr
);
305 /* connect to server */
306 if ((connect(ptr
->fd
, use
->ai_addr
, use
->ai_addrlen
) == -1))
308 ptr
->cached_errno
= errno
;
309 if (errno
== EINPROGRESS
|| /* nonblocking mode - first return, */
310 errno
== EALREADY
) /* nonblocking mode - subsequent returns */
312 struct pollfd fds
[1];
314 fds
[0].events
= POLLOUT
;
316 int timeout
= ptr
->root
->connect_timeout
;
317 if (ptr
->root
->flags
.no_block
== false)
323 int error
= poll(fds
, 1, timeout
);
332 // A real error occurred and we need to completely bail
334 WATCHPOINT_ERRNO(errno
);
337 #ifdef TARGET_OS_LINUX
343 if (fds
[0].revents
& POLLERR
)
346 socklen_t len
= sizeof (err
);
347 (void)getsockopt(ptr
->fd
, SOL_SOCKET
, SO_ERROR
, &err
, &len
);
348 ptr
->cached_errno
= (err
== 0) ? errno
: err
;
351 (void)close(ptr
->fd
);
359 else if (errno
== EISCONN
) /* we are connected :-) */
363 else if (errno
!= EINTR
)
365 (void)close(ptr
->fd
);
371 #ifdef LIBMEMCACHED_WITH_SASL_SUPPORT
372 if (ptr
->fd
!= -1 && ptr
->root
->sasl
.callbacks
!= NULL
)
374 memcached_return rc
= memcached_sasl_authenticate_connection(ptr
);
375 if (rc
!= MEMCACHED_SUCCESS
)
377 (void)close(ptr
->fd
);
388 return MEMCACHED_SUCCESS
;
396 WATCHPOINT_STRING("Never got a good file descriptor");
398 /* Failed to connect. schedule next retry */
399 if (ptr
->root
->retry_timeout
)
401 struct timeval next_time
;
403 if (gettimeofday(&next_time
, NULL
) == 0)
404 ptr
->next_retry
= next_time
.tv_sec
+ ptr
->root
->retry_timeout
;
407 if (ptr
->cached_errno
== 0)
408 return MEMCACHED_TIMEOUT
;
410 return MEMCACHED_ERRNO
; /* The last error should be from connect() */
413 return MEMCACHED_SUCCESS
; /* The last error should be from connect() */
416 void set_last_disconnected_host(memcached_server_write_instance_st ptr
)
419 memcached_st
*root
= (memcached_st
*)ptr
->root
;
422 WATCHPOINT_STRING(ptr
->hostname
);
423 WATCHPOINT_NUMBER(ptr
->port
);
424 WATCHPOINT_ERRNO(ptr
->cached_errno
);
426 if (root
->last_disconnected_server
)
427 memcached_server_free(root
->last_disconnected_server
);
428 root
->last_disconnected_server
= memcached_server_clone(NULL
, ptr
);
431 memcached_return_t
memcached_connect(memcached_server_write_instance_st ptr
)
433 memcached_return_t rc
= MEMCACHED_NO_SERVERS
;
434 LIBMEMCACHED_MEMCACHED_CONNECT_START();
436 /* both retry_timeout and server_failure_limit must be set in order to delay retrying a server on error. */
437 WATCHPOINT_ASSERT(ptr
->root
);
438 if (ptr
->root
->retry_timeout
&& ptr
->next_retry
)
440 struct timeval curr_time
;
442 gettimeofday(&curr_time
, NULL
);
444 // We should optimize this to remove the allocation if the server was
445 // the last server to die
446 if (ptr
->next_retry
> curr_time
.tv_sec
)
448 set_last_disconnected_host(ptr
);
450 return MEMCACHED_SERVER_MARKED_DEAD
;
454 // If we are over the counter failure, we just fail. Reject host only
455 // works if you have a set number of failures.
456 if (ptr
->root
->server_failure_limit
&& ptr
->server_failure_counter
>= ptr
->root
->server_failure_limit
)
458 set_last_disconnected_host(ptr
);
460 // @todo fix this by fixing behavior to no longer make use of
462 if (_is_auto_eject_host(ptr
->root
))
464 run_distribution((memcached_st
*)ptr
->root
);
467 return MEMCACHED_SERVER_MARKED_DEAD
;
470 /* We need to clean up the multi startup piece */
473 case MEMCACHED_CONNECTION_UNKNOWN
:
474 WATCHPOINT_ASSERT(0);
475 rc
= MEMCACHED_NOT_SUPPORTED
;
477 case MEMCACHED_CONNECTION_UDP
:
478 case MEMCACHED_CONNECTION_TCP
:
479 rc
= network_connect(ptr
);
481 case MEMCACHED_CONNECTION_UNIX_SOCKET
:
482 rc
= unix_socket_connect(ptr
);
484 case MEMCACHED_CONNECTION_MAX
:
486 WATCHPOINT_ASSERT(0);
489 if (rc
== MEMCACHED_SUCCESS
)
491 ptr
->server_failure_counter
= 0;
496 ptr
->server_failure_counter
++;
498 set_last_disconnected_host(ptr
);
501 LIBMEMCACHED_MEMCACHED_CONNECT_END();