source/lib/util/util_sock.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Tim Potter      2000-2001
   6
   7    This program 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 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program 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 this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23 #include "system/network.h"
  24
  25 /**
  26  * @file
  27  * @brief Socket utility functions
  28  */
  29
  30 enum SOCK_OPT_TYPES {OPT_BOOL,OPT_INT,OPT_ON};
  31
  32 static const struct {
  33         const char *name;
  34         int level;
  35         int option;
  36         int value;
  37         int opttype;
  38 } socket_options[] = {
  39   {"SO_KEEPALIVE",      SOL_SOCKET,    SO_KEEPALIVE,    0,                 OPT_BOOL},
  40   {"SO_REUSEADDR",      SOL_SOCKET,    SO_REUSEADDR,    0,                 OPT_BOOL},
  41   {"SO_BROADCAST",      SOL_SOCKET,    SO_BROADCAST,    0,                 OPT_BOOL},
  42 #ifdef TCP_NODELAY
  43   {"TCP_NODELAY",       IPPROTO_TCP,   TCP_NODELAY,     0,                 OPT_BOOL},
  44 #endif
  45 #ifdef IPTOS_LOWDELAY
  46   {"IPTOS_LOWDELAY",    IPPROTO_IP,    IP_TOS,          IPTOS_LOWDELAY,    OPT_ON},
  47 #endif
  48 #ifdef IPTOS_THROUGHPUT
  49   {"IPTOS_THROUGHPUT",  IPPROTO_IP,    IP_TOS,          IPTOS_THROUGHPUT,  OPT_ON},
  50 #endif
  51 #ifdef SO_REUSEPORT
  52   {"SO_REUSEPORT",      SOL_SOCKET,    SO_REUSEPORT,    0,                 OPT_BOOL},
  53 #endif
  54 #ifdef SO_SNDBUF
  55   {"SO_SNDBUF",         SOL_SOCKET,    SO_SNDBUF,       0,                 OPT_INT},
  56 #endif
  57 #ifdef SO_RCVBUF
  58   {"SO_RCVBUF",         SOL_SOCKET,    SO_RCVBUF,       0,                 OPT_INT},
  59 #endif
  60 #ifdef SO_SNDLOWAT
  61   {"SO_SNDLOWAT",       SOL_SOCKET,    SO_SNDLOWAT,     0,                 OPT_INT},
  62 #endif
  63 #ifdef SO_RCVLOWAT
  64   {"SO_RCVLOWAT",       SOL_SOCKET,    SO_RCVLOWAT,     0,                 OPT_INT},
  65 #endif
  66 #ifdef SO_SNDTIMEO
  67   {"SO_SNDTIMEO",       SOL_SOCKET,    SO_SNDTIMEO,     0,                 OPT_INT},
  68 #endif
  69 #ifdef SO_RCVTIMEO
  70   {"SO_RCVTIMEO",       SOL_SOCKET,    SO_RCVTIMEO,     0,                 OPT_INT},
  71 #endif
  72   {NULL,0,0,0,0}};
  73
  74
  75 /**
  76  Set user socket options.
  77 **/
  78 _PUBLIC_ void set_socket_options(int fd, const char *options)
  79 {
  80         const char **options_list = str_list_make(NULL, options, " \t,");
  81         int j;
  82
  83         if (!options_list)
  84                 return;
  85
  86         for (j = 0; options_list[j]; j++) {
  87                 const char *tok = options_list[j];
  88                 int ret=0,i;
  89                 int value = 1;
  90                 char *p;
  91                 BOOL got_value = False;
  92
  93                 if ((p = strchr_m(tok,'='))) {
  94                         *p = 0;
  95                         value = atoi(p+1);
  96                         got_value = True;
  97                 }
  98
  99                 for (i=0;socket_options[i].name;i++)
 100                         if (strequal(socket_options[i].name,tok))
 101                                 break;
 102
 103                 if (!socket_options[i].name) {
 104                         DEBUG(0,("Unknown socket option %s\n",tok));
 105                         continue;
 106                 }
 107
 108                 switch (socket_options[i].opttype) {
 109                 case OPT_BOOL:
 110                 case OPT_INT:
 111                         ret = setsockopt(fd,socket_options[i].level,
 112                                                 socket_options[i].option,(char *)&value,sizeof(int));
 113                         break;
 114
 115                 case OPT_ON:
 116                         if (got_value)
 117                                 DEBUG(0,("syntax error - %s does not take a value\n",tok));
 118
 119                         {
 120                                 int on = socket_options[i].value;
 121                                 ret = setsockopt(fd,socket_options[i].level,
 122                                                         socket_options[i].option,(char *)&on,sizeof(int));
 123                         }
 124                         break;
 125                 }
 126
 127                 if (ret != 0)
 128                         DEBUG(0,("Failed to set socket option %s (Error %s)\n",tok, strerror(errno) ));
 129         }
 130
 131         talloc_free(options_list);
 132 }
 133