X-Git-Url: https://git.m6w6.name/?a=blobdiff_plain;f=lib%2Fmemcached_connect.c;h=4bfc710fa23e9c1543de27c46da52bbfa37d6116;hb=5ed23cb1d7aaa03f05b58dfeabeee72f5aff91c5;hp=31f8ce1629458952b832d512da10a1a2f766a577;hpb=be683ec76c3d55c427d72d3529f521e479967f6b;p=awesomized%2Flibmemcached

diff --git a/lib/memcached_connect.c b/lib/memcached_connect.c
index 31f8ce16..4bfc710f 100644
--- a/lib/memcached_connect.c
+++ b/lib/memcached_connect.c
@@ -1,89 +1,311 @@
-#include <memcached.h>
+#include "common.h"
 
-memcached_return memcached_server_add(memcached_st *ptr, char *hostname, unsigned int port)
+static memcached_return set_hostinfo(memcached_server_st *server)
 {
-  if (!port)
-    port= MEMCACHED_DEFAULT_PORT; 
+  struct addrinfo *ai;
+  struct addrinfo hints;
+  int e;
+  char str_port[NI_MAXSERV];
 
-  if (!hostname)
-    hostname= "localhost"; 
+  sprintf(str_port, "%u", server->port);
 
+  memset(&hints, 0, sizeof(hints));
 
-  ptr->hosts= (memcached_host_st *)realloc(ptr->hosts, sizeof(memcached_host_st) * (ptr->number_of_hosts+1));
-  memset(ptr->hosts, 0, sizeof(memcached_host_st) * (size_t)ptr->number_of_hosts);
-  ptr->hosts[ptr->number_of_hosts].hostname=
-    (char *)malloc(sizeof(char) * (strlen(hostname) + 1));
-  memset(ptr->hosts[ptr->number_of_hosts].hostname, 0, sizeof(char) * (strlen(hostname) + 1));
-  memcpy(ptr->hosts[ptr->number_of_hosts].hostname, hostname, strlen(hostname));
-  ptr->hosts[ptr->number_of_hosts].port= port;
-  ptr->hosts[ptr->number_of_hosts].fd= -1;
-  ptr->number_of_hosts++;
+  hints.ai_family= AF_INET;
+  if (server->type == MEMCACHED_CONNECTION_UDP)
+  {
+    hints.ai_protocol= IPPROTO_UDP;
+    hints.ai_socktype= SOCK_DGRAM;
+  }
+  else
+  {
+    hints.ai_socktype= SOCK_STREAM;
+    hints.ai_protocol= IPPROTO_TCP;
+  }
+
+  e= getaddrinfo(server->hostname, str_port, &hints, &ai);
+  if (e != 0)
+  {
+    WATCHPOINT_STRING(server->hostname);
+    WATCHPOINT_STRING(gai_strerror(e));
+    return MEMCACHED_HOST_LOOKUP_FAILURE;
+  }
+
+  if (server->address_info)
+    freeaddrinfo(server->address_info);
+  server->address_info= ai;
 
   return MEMCACHED_SUCCESS;
 }
 
-memcached_return memcached_connect(memcached_st *ptr)
+static memcached_return set_socket_options(memcached_server_st *ptr)
 {
-  unsigned int x;
-  struct sockaddr_in localAddr, servAddr;
-  struct hostent *h;
-  memcached_host_st *host_ptr;
-
-  if (ptr->connected)
+  if (ptr->type == MEMCACHED_CONNECTION_UDP)
     return MEMCACHED_SUCCESS;
 
-  if (!ptr->hosts)
+  if (ptr->root->flags & MEM_NO_BLOCK)
+  {
+    int error;
+    struct linger linger;
+    struct timeval waittime;
+
+    waittime.tv_sec= 10;
+    waittime.tv_usec= 0;
+
+    linger.l_onoff= 1; 
+    linger.l_linger= MEMCACHED_DEFAULT_TIMEOUT; 
+    error= setsockopt(ptr->fd, SOL_SOCKET, SO_LINGER, 
+                      &linger, (socklen_t)sizeof(struct linger));
+    WATCHPOINT_ASSERT(error == 0);
+
+    error= setsockopt(ptr->fd, SOL_SOCKET, SO_SNDTIMEO, 
+                      &waittime, (socklen_t)sizeof(struct timeval));
+    WATCHPOINT_ASSERT(error == 0);
+
+    error= setsockopt(ptr->fd, SOL_SOCKET, SO_RCVTIMEO, 
+                      &waittime, (socklen_t)sizeof(struct timeval));
+    WATCHPOINT_ASSERT(error == 0);
+  }
+
+  if (ptr->root->flags & MEM_TCP_NODELAY)
   {
-    memcached_return rc;
-    rc= memcached_server_add(ptr, NULL, 0);
+    int flag= 1;
+    int error;
 
-    if (rc != MEMCACHED_SUCCESS)
-      return rc;
+    error= setsockopt(ptr->fd, IPPROTO_TCP, TCP_NODELAY, 
+                      &flag, (socklen_t)sizeof(int));
+    WATCHPOINT_ASSERT(error == 0);
   }
 
+  if (ptr->root->send_size)
+  {
+    int error;
+
+    error= setsockopt(ptr->fd, SOL_SOCKET, SO_SNDBUF, 
+                      &ptr->root->send_size, (socklen_t)sizeof(int));
+    WATCHPOINT_ASSERT(error == 0);
+  }
+
+  if (ptr->root->recv_size)
+  {
+    int error;
+
+    error= setsockopt(ptr->fd, SOL_SOCKET, SO_SNDBUF, 
+                      &ptr->root->recv_size, (socklen_t)sizeof(int));
+    WATCHPOINT_ASSERT(error == 0);
+  }
 
-  for (x= 0; x < ptr->number_of_hosts; x++)
+  /* For the moment, not getting a nonblocking mode will not be fatal */
+  if (ptr->root->flags & MEM_NO_BLOCK)
   {
-    if ((h= gethostbyname(ptr->hosts[x].hostname)) == NULL)
+    int flags;
+
+    flags= fcntl(ptr->fd, F_GETFL, 0);
+    if (flags != -1)
     {
-      fprintf(stderr, "unknown host '%s'\n", ptr->hosts[x].hostname);
-      return MEMCACHED_HOST_LOCKUP_FAILURE;
+      (void)fcntl(ptr->fd, F_SETFL, flags | O_NONBLOCK);
     }
+  }
 
-    servAddr.sin_family= h->h_addrtype;
-    memcpy((char *) &servAddr.sin_addr.s_addr, h->h_addr_list[0], h->h_length);
-    servAddr.sin_port = htons(ptr->hosts[x].port);
+  return MEMCACHED_SUCCESS;
+}
 
-    /* Create the socket */
-    if ((ptr->hosts[0].fd= socket(AF_INET, SOCK_STREAM, 0)) < 0)
+static memcached_return unix_socket_connect(memcached_server_st *ptr)
+{
+  struct sockaddr_un servAddr;
+  socklen_t addrlen;
+
+  if (ptr->fd == -1)
+  {
+    if ((ptr->fd= socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
     {
-      fprintf(stderr, "cannot open socket");
+      ptr->cached_errno= errno;
       return MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE;
     }
 
+    memset(&servAddr, 0, sizeof (struct sockaddr_un));
+    servAddr.sun_family= AF_UNIX;
+    strcpy(servAddr.sun_path, ptr->hostname); /* Copy filename */
+
+    addrlen= strlen(servAddr.sun_path) + sizeof(servAddr.sun_family);
+
+test_connect:
+    if (connect(ptr->fd, 
+                (struct sockaddr *)&servAddr,
+                sizeof(servAddr)) < 0)
+    {
+      switch (errno) {
+      case EINPROGRESS:
+        {
+        struct timeval tm = { ptr->root->connect_timeout, 0 };
+        socklen_t len= sizeof(int);
+        fd_set wset;
+        int error=0, value;
+
+        FD_ZERO(&wset);
+        FD_SET(ptr->fd, &wset);
+
+        select(ptr->fd+1, NULL, &wset, NULL, &tm);
+        if (FD_ISSET(ptr->fd, &wset) != 0)
+        {
+          if (getsockopt(ptr->fd, SOL_SOCKET, SO_ERROR, &value, &len) == 0)
+          {
+            if (value)
+            {
+              error= 1;
+            }
+          }
+          else
+          {
+            error= 1;
+          }
+        }
+        else
+        {
+          error= 1;
+        }
+
+        if (error)
+        {
+          ptr->cached_errno= errno;
+          WATCHPOINT_ERRNO(ptr->cached_errno);
+          close(ptr->fd);
+          ptr->fd= -1;
+          return MEMCACHED_ERRNO;
+        }
+
+        break;
+        }
+        /* We are spinning waiting on connect */
+      case EALREADY:
+      case EINTR:
+        goto test_connect;
+      case EISCONN: /* We were spinning waiting on connect */
+        break;
+      default:
+        WATCHPOINT_ERRNO(errno);
+        ptr->cached_errno= errno;
+        return MEMCACHED_ERRNO;
+      }
+    }
+  }
+  return MEMCACHED_SUCCESS;
+}
+
+static memcached_return network_connect(memcached_server_st *ptr)
+{
+  if (ptr->fd == -1)
+  {
+    struct addrinfo *use;
 
-    /* bind any port number */
-    localAddr.sin_family = AF_INET;
-    localAddr.sin_addr.s_addr = htonl(INADDR_ANY);
-    localAddr.sin_port = htons(0);
+    /* Old connection junk still is in the structure */
+    WATCHPOINT_ASSERT(ptr->cursor_active == 0);
 
-    if (bind(ptr->hosts[0].fd, (struct sockaddr *) &localAddr, sizeof(localAddr)) < 0)
+    if (ptr->sockaddr_inited == MEMCACHED_NOT_ALLOCATED || 
+        (!(ptr->root->flags & MEM_USE_CACHE_LOOKUPS)))
     {
-      fprintf(stderr, "cannot bind port TCP %u\n", ptr->hosts[x].port);
-      return(MEMCACHED_CONNECTION_BIND_FAILURE);
+      memcached_return rc;
+
+      rc= set_hostinfo(ptr);
+      if (rc != MEMCACHED_SUCCESS)
+        return rc;
+      ptr->sockaddr_inited= MEMCACHED_ALLOCATED;
     }
 
-    /* connect to server */
-    if (connect(ptr->hosts[0].fd, (struct sockaddr *) &servAddr, sizeof(servAddr)) < 0)
+    use= ptr->address_info;
+    /* Create the socket */
+    while (use != NULL)
     {
-      fprintf(stderr, "cannot connect to host '%s' (%u)  (error: %s)\n", ptr->hosts[x].hostname, 
-              ptr->hosts[x].port,
-              strerror(errno));
-      return MEMCACHED_HOST_LOCKUP_FAILURE;
+      if ((ptr->fd= socket(use->ai_family, 
+                           use->ai_socktype, 
+                           use->ai_protocol)) < 0)
+      {
+        ptr->cached_errno= errno;
+        WATCHPOINT_ERRNO(errno);
+        return MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE;
+      }
+
+      (void)set_socket_options(ptr);
+
+      /* connect to server */
+test_connect:
+      if (connect(ptr->fd, 
+                  use->ai_addr, 
+                  use->ai_addrlen) < 0)
+      {
+        switch (errno) {
+          /* We are spinning waiting on connect */
+        case EALREADY:
+        case EINPROGRESS:
+        case EINTR:
+          goto test_connect;
+        case EISCONN: /* We were spinning waiting on connect */
+          break;
+        default:
+          ptr->cached_errno= errno;
+          WATCHPOINT_ERRNO(ptr->cached_errno);
+          close(ptr->fd);
+          ptr->fd= -1;
+          if (ptr->root->retry_timeout)
+          {
+            struct timeval next_time;
+
+            gettimeofday(&next_time, NULL);
+            ptr->next_retry= next_time.tv_sec + ptr->root->retry_timeout;
+          }
+        }
+      }
+      else
+      {
+        WATCHPOINT_ASSERT(ptr->cursor_active == 0);
+        return MEMCACHED_SUCCESS;
+      }
+      use = use->ai_next;
     }
   }
 
-  ptr->connected= 1;
+  if (ptr->fd == -1)
+    return MEMCACHED_ERRNO; /* The last error should be from connect() */
 
-  return MEMCACHED_SUCCESS;
+  return MEMCACHED_SUCCESS; /* The last error should be from connect() */
+}
+
+
+memcached_return memcached_connect(memcached_server_st *ptr)
+{
+  memcached_return rc= MEMCACHED_NO_SERVERS;
+  LIBMEMCACHED_MEMCACHED_CONNECT_START();
+
+  if (ptr->root->retry_timeout)
+  {
+    struct timeval next_time;
+
+    gettimeofday(&next_time, NULL);
+    if (next_time.tv_sec < ptr->next_retry)
+      return MEMCACHED_TIMEOUT;
+  }
+  /* We need to clean up the multi startup piece */
+  switch (ptr->type)
+  {
+  case MEMCACHED_CONNECTION_UNKNOWN:
+    WATCHPOINT_ASSERT(0);
+    rc= MEMCACHED_NOT_SUPPORTED;
+    break;
+  case MEMCACHED_CONNECTION_UDP:
+  case MEMCACHED_CONNECTION_TCP:
+    rc= network_connect(ptr);
+    break;
+  case MEMCACHED_CONNECTION_UNIX_SOCKET:
+    rc= unix_socket_connect(ptr);
+    break;
+  default:
+    WATCHPOINT_ASSERT(0);
+  }
+
+  if (rc != MEMCACHED_SUCCESS)
+    WATCHPOINT_ERROR(rc);
+
+  LIBMEMCACHED_MEMCACHED_CONNECT_END();
+
+  return rc;
 }