diff options
Diffstat (limited to 'src/libmowgli/dns/dns_evloop_reslist_win32.c')
| -rw-r--r-- | src/libmowgli/dns/dns_evloop_reslist_win32.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/libmowgli/dns/dns_evloop_reslist_win32.c b/src/libmowgli/dns/dns_evloop_reslist_win32.c new file mode 100644 index 0000000..eb45ce8 --- /dev/null +++ b/src/libmowgli/dns/dns_evloop_reslist_win32.c @@ -0,0 +1,97 @@ +/* + * reslist.c - get nameservers from windows * + * + * Copyright 1998 by the Massachusetts Institute of Technology. + * Copyright (C) 2007-2008 by Daniel Stenberg + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +#ifdef _WIN32 +#include "mowgli.h" +#include <windows.h> +#include <iphlpapi.h> + +int +mowgli_dns_get_windows_nameservers(char *ret_buf, size_t ret_size) +{ + FIXED_INFO *fixedinfo, tfixedinfo; + DWORD size = sizeof(*fixedinfo); + typedef DWORD(WINAPI * get_net_param_func) (FIXED_INFO *, DWORD *); + get_net_param_func get_network_params; + HMODULE handle; + IP_ADDR_STRING *ip_addr; + int i, count = 0; + size_t ip_size = sizeof("255.255.255.255"); + size_t left = ret_size; + char *ret = ret_buf; + HRESULT res; + + if (!(handle = LoadLibrary("iphlpapi.dll"))) + return 0; + + if (!(get_network_params = (get_net_param_func)GetProcAddress(handle, "GetNetworkParams"))) + goto quit; + + res = (*get_network_params)(&tfixedinfo, &size); + if((res != ERROR_BUFFER_OVERFLOW) && (res != ERROR_SUCCESS)) + goto quit; + + fixedinfo = mowgli_alloc(size); + if(!fixedinfo || (*get_network_params)(fixedinfo, &size) != ERROR_SUCCESS) + goto quit; + +#ifdef DEBUG + mowgli_log("Host Name: %s\n", fixedinfo->HostName); + mowgli_log("Domain Name: %s\n", fixedinfo->DomainName); + mowgli_log("DNS Servers:\n\t%s (primary)\n", fixedinfo->DnsServerList.IpAddress.String); +#endif + + if(strlen(fixedinfo->DnsServerList.IpAddress.String) > 0 && + inet_addr(fixedinfo->DnsServerList.IpAddress.String) != INADDR_NONE && left > ip_size) + { + ret += sprintf(ret, "%s,", fixedinfo->DnsServerList.IpAddress.String); + left -= ret - ret_buf; + count++; + } + + for(i = 0, ip_addr = fixedinfo->DnsServerList.Next; ip_addr && left > ip_size; ip_addr = ip_addr->Next, i++) + { + if(inet_addr(ip_addr->IpAddress.String) != INADDR_NONE) + { + ret += sprintf(ret, "%s,", ip_addr->IpAddress.String); + left -= ret - ret_buf; + count++; + } +#ifdef DEBUG + mowgli_log("\t%s (secondary %d)\n", ip_addr->IpAddress.String, i + 1); +#endif + } + + mowgli_free(fixedinfo); + +quit: + if(handle) + FreeLibrary(handle); + + if(left <= ip_size) + mowgli_log("Too many nameservers. Truncating to %d addressess", count); + + if(ret > ret_buf) + ret[-1] = '\0'; + + return count; +} + +#endif + |