release/src/router/udpxy/ifaddr.h

   1 /* @(#) definition of packet-io functions for udpxy
   2  *
   3  * Copyright 2008-2011 Pavel V. Cherenkov (pcherenkov@gmail.com)
   4  *
   5  *  This file is part of udpxy.
   6  *
   7  *  udpxy is free software: you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation, either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  udpxy is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with udpxy.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #ifndef IFADDR_UDPXY_0102081930
  22 #define IFADDR_UDPXY_0102081930
  23
  24 #include <sys/types.h>
  25
  26 #ifdef __cplusplus
  27  extern "C" {
  28 #endif
  29
  30 struct sockaddr;
  31
  32 /* retrieve IPv4 address of the given network interface
  33  *
  34  * @param ifname    name of the network interface
  35  * @param addr      pointer to socket address structure
  36  * @param addrlen   socket structure size
  37  *
  38  * @return 0 if success, -1 otherwise
  39  */
  40 int
  41 if2addr( const char* ifname,
  42          struct sockaddr *addr, size_t addrlen );
  43
  44
  45 /* convert input parameter into an IPv4-address string
  46  *
  47  * @param s     input text string
  48  * @param buf   buffer for the destination string
  49  * @param len   size of the string buffer
  50  *
  51  * @return 0 if success, -1 otherwise
  52  */
  53 int
  54 get_ipv4_address( const char* s, char* buf, size_t len );
  55
  56
  57 /* split input string into IP address and port
  58  *
  59  * @param s     input text string
  60  * @param addr  IP address (string) destination buffer
  61  * @param len   buffer length
  62  * @param port  address of port variable
  63  *
  64  * @return 0 in success, !=0 otherwise
  65  */
  66 int
  67 get_addrport( const char* s, char* addr, size_t len, int* port );
  68
  69
  70 #ifdef __cplusplus
  71 }
  72 #endif
  73
  74 #endif /* IFADDR_UDPXY_0102081930 */
  75
  76 /* __EOF__ */
  77