git.m6w6.name Git - m6w6/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   if (!port)
   6     port= MEMCACHED_DEFAULT_PORT;
   7
   8   if (!hostname)
   9     hostname= "localhost";
  10
  11
  12   ptr->hosts= (memcached_host_st *)realloc(ptr->hosts, sizeof(memcached_host_st) * (ptr->number_of_hosts+1));
  13   ptr->hosts[ptr->number_of_hosts].hostname=
  14     (char *)malloc(sizeof(char) * (strlen(hostname)+1));
  15   memset(ptr->hosts[ptr->number_of_hosts].hostname, 0, strlen(hostname)+1);
  16   memcpy(ptr->hosts[ptr->number_of_hosts].hostname, hostname, strlen(hostname));
  17   ptr->hosts[ptr->number_of_hosts].port= port;
  18   ptr->hosts[ptr->number_of_hosts].fd= -1;
  19   ptr->number_of_hosts++;
  20
  21   return MEMCACHED_SUCCESS;
  22 }
  23
  24 memcached_return memcached_connect(memcached_st *ptr)
  25 {
  26   unsigned int x;
  27   struct sockaddr_in localAddr, servAddr;
  28   struct hostent *h;
  29   memcached_host_st *host_ptr;
  30
  31   if (ptr->connected)
  32     return MEMCACHED_SUCCESS;
  33
  34   if (!ptr->hosts)
  35   {
  36     memcached_return rc;
  37     rc= memcached_server_add(ptr, NULL, 0);
  38
  39     if (rc != MEMCACHED_SUCCESS)
  40       return rc;
  41   }
  42
  43
  44   for (x= 0; x < ptr->number_of_hosts; x++)
  45   {
  46     if ((h= gethostbyname(ptr->hosts[x].hostname)) == NULL)
  47     {
  48       fprintf(stderr, "unknown host '%s'\n", ptr->hosts[x].hostname);
  49       return MEMCACHED_HOST_LOCKUP_FAILURE;
  50     }
  51
  52     servAddr.sin_family= h->h_addrtype;
  53     memcpy((char *) &servAddr.sin_addr.s_addr, h->h_addr_list[0], h->h_length);
  54     servAddr.sin_port = htons(ptr->hosts[x].port);
  55
  56     /* Create the socket */
  57     if ((ptr->hosts[0].fd= socket(AF_INET, SOCK_STREAM, 0)) < 0)
  58     {
  59       fprintf(stderr, "cannot open socket");
  60       return MEMCACHED_CONNECTION_SOCKET_CREATE_FAILURE;
  61     }
  62
  63
  64     /* bind any port number */
  65     localAddr.sin_family = AF_INET;
  66     localAddr.sin_addr.s_addr = htonl(INADDR_ANY);
  67     localAddr.sin_port = htons(0);
  68
  69     if (bind(ptr->hosts[0].fd, (struct sockaddr *) &localAddr, sizeof(localAddr)) < 0)
  70     {
  71       fprintf(stderr, "cannot bind port TCP %u\n", ptr->hosts[x].port);
  72       return(MEMCACHED_CONNECTION_BIND_FAILURE);
  73     }
  74
  75     /* connect to server */
  76     if (connect(ptr->hosts[0].fd, (struct sockaddr *) &servAddr, sizeof(servAddr)) < 0)
  77     {
  78       fprintf(stderr, "cannot connect to host '%s' (%u)  (error: %s)\n", ptr->hosts[x].hostname,
  79               ptr->hosts[x].port,
  80               strerror(errno));
  81       return MEMCACHED_HOST_LOCKUP_FAILURE;
  82     }
  83   }
  84
  85   ptr->connected= 1;
  86
  87   return MEMCACHED_SUCCESS;
  88 }