u-tools/apps/android_port/libcutils/socket_network_client.c

   1 /* libs/cutils/socket_network_client.c
   2 **
   3 ** Copyright 2006, The Android Open Source Project
   4 **
   5 ** Licensed under the Apache License, Version 2.0 (the "License");
   6 ** you may not use this file except in compliance with the License.
   7 ** You may obtain a copy of the License at
   8 **
   9 **     http://www.apache.org/licenses/LICENSE-2.0
  10 **
  11 ** Unless required by applicable law or agreed to in writing, software
  12 ** distributed under the License is distributed on an "AS IS" BASIS,
  13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 ** See the License for the specific language governing permissions and
  15 ** limitations under the License.
  16 */
  17
  18 #include <cutils/sockets.h>
  19
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <unistd.h>
  23 #include <errno.h>
  24 #include <stddef.h>
  25
  26 #ifndef HAVE_WINSOCK
  27 #include <sys/socket.h>
  28 #include <sys/select.h>
  29 #include <sys/types.h>
  30 #include <netinet/in.h>
  31 #include <netdb.h>
  32 #endif
  33
  34
  35 /* Connect to port on the IP interface. type is
  36  * SOCK_STREAM or SOCK_DGRAM.
  37  * return is a file descriptor or -1 on error
  38  */
  39 int socket_network_client(const char *host, int port, int type)
  40 {
  41     struct hostent *hp;
  42     struct sockaddr_in addr;
  43     socklen_t alen;
  44     int s;
  45
  46     hp = gethostbyname(host);
  47     if(hp == 0) return -1;
  48
  49     memset(&addr, 0, sizeof(addr));
  50     addr.sin_family = hp->h_addrtype;
  51     addr.sin_port = htons(port);
  52     memcpy(&addr.sin_addr, hp->h_addr, hp->h_length);
  53
  54     s = socket(hp->h_addrtype, type, 0);
  55     if(s < 0) return -1;
  56
  57     if(connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
  58         close(s);
  59         return -1;
  60     }
  61
  62     return s;
  63
  64 }
  65