git.m6w6.name Git - awesomized/libmemcached/blob - lib/memcached_connect.c

   1 #include <memcached.h>
   2
   3 memcached_return memcached_server_add(memcached_st *ptr, char *hostname, unsigned int port)
   4 {
   5   memcached_host_st *host_ptr, *prev_ptr;
   6
   7   if (!port)
   8     port= MEMCACHED_DEFAULT_PORT;
   9
  10   if (!hostname)
  11     hostname= "localhost";
  12
  13   if (ptr->hosts)
  14   {
  15     for (host_ptr= ptr->hosts; host_ptr; host_ptr= host_ptr->next)
  16       prev_ptr= host_ptr;
  17     host_ptr= (memcached_host_st *)malloc(sizeof(memcached_host_st));
  18     if (!host_ptr)
  19       return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
  20     prev_ptr->next= host_ptr;
  21   }
  22   else
  23   {
  24     ptr->hosts=
  25       host_ptr= (memcached_host_st *)malloc(sizeof(memcached_host_st));
  26     if (!host_ptr)
  27       return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
  28   }
  29
  30   memset(host_ptr, 0, sizeof(memcached_host_st));
  31   host_ptr->hostname= (char *)malloc(sizeof(char) * strlen(hostname));
  32
  33   if (!host_ptr->hostname)
  34   {
  35     free(host_ptr);
  36     return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
  37   }
  38   memcpy(host_ptr->hostname, hostname, strlen(hostname));
  39   host_ptr->port= port;
  40
  41   return MEMCACHED_SUCCESS;
  42 }
  43
  44 memcached_return memcached_connect(memcached_st *ptr)
  45 {
  46   struct sockaddr_in localAddr, servAddr;
  47   struct hostent *h;
  48   memcached_host_st *host_ptr;
  49
  50   if (ptr->connected)
  51     return MEMCACHED_SUCCESS;
  52
  53   if (!ptr->hosts)
  54   {
  55     memcached_return rc;
  56     rc= memcached_server_add(ptr, NULL, 0);
  57
  58     if (rc != MEMCACHED_SUCCESS)
  59       return rc;
  60   }
  61
  62
  63   for (host_ptr= ptr->hosts; host_ptr; host_ptr= host_ptr->next)
  64   {
  65     if ((h= gethostbyname(host_ptr->hostname)) == NULL)
  66     {
  67       fprintf(stderr, "unknown host '%s'\n", host_ptr->hostname);
  68       return MEMCACHED_HOST_LOCKUP_FAILURE;
  69     }
  70
  71     servAddr.sin_family= h->h_addrtype;
  72     memcpy((char *) &servAddr.sin_addr.s_addr, h->h_addr_list[0], h->h_length);
  73     servAddr.sin_port = htons(host_ptr->port);
  74
  75     /* Create the socket */
  76     if ((ptr->fd= socket(AF_INET, SOCK_STREAM, 0)) < 0)
  77     {
  78       fprintf(stderr, "cannot open socket");
  79       return MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE;
  80     }
  81
  82
  83     /* bind any port number */
  84     localAddr.sin_family = AF_INET;
  85     localAddr.sin_addr.s_addr = htonl(INADDR_ANY);
  86     localAddr.sin_port = htons(0);
  87
  88     if (bind(ptr->fd, (struct sockaddr *) &localAddr, sizeof(localAddr)) < 0)
  89     {
  90       fprintf(stderr, "cannot bind port TCP %u\n", host_ptr->port);
  91       return(MEMCACHED_CONNECTION_BIND_FAILURE);
  92     }
  93
  94     /* connect to server */
  95     if (connect(ptr->fd, (struct sockaddr *) &servAddr, sizeof(servAddr)) < 0)
  96     {
  97       fprintf(stderr, "cannot connect to host '%s' (%u)  (error: %s)\n", host_ptr->hostname,
  98               host_ptr->port,
  99               strerror(errno));
 100       return MEMCACHED_HOST_LOCKUP_FAILURE;
 101     }
 102   }
 103
 104   ptr->connected= 1;
 105
 106   return MEMCACHED_SUCCESS;
 107 }