From: Paul Gofman pgofman@codeweavers.com
--- dlls/iphlpapi/iphlpapi_main.c | 195 ++++++++++++++++++++++++++++++++-- include/netioapi.h | 3 + 2 files changed, 187 insertions(+), 11 deletions(-)
diff --git a/dlls/iphlpapi/iphlpapi_main.c b/dlls/iphlpapi/iphlpapi_main.c index 1231b98e656..31c6c03eb8c 100644 --- a/dlls/iphlpapi/iphlpapi_main.c +++ b/dlls/iphlpapi/iphlpapi_main.c @@ -4681,24 +4681,197 @@ DWORD WINAPI GetIpInterfaceEntry( MIB_IPINTERFACE_ROW *row ) return ERROR_SUCCESS; }
+static BOOL match_ip_address_with_prefix( const SOCKADDR_INET *addr, const IP_ADDRESS_PREFIX *pfx ) +{ + const BYTE *p1, *p2; + unsigned int len; + BYTE mask; + + if (addr->si_family != pfx->Prefix.si_family) return FALSE; + if (!(len = pfx->PrefixLength)) return TRUE; + + if (addr->si_family == AF_INET6) + { + if (len > 128) return FALSE; + p1 = (const BYTE *)&addr->Ipv6.sin6_addr; + p2 = (const BYTE *)&pfx->Prefix.Ipv6.sin6_addr; + } + else + { + if (len > 32) return FALSE; + p1 = (const BYTE *)&addr->Ipv4.sin_addr; + p2 = (const BYTE *)&pfx->Prefix.Ipv4.sin_addr; + } + if (memcmp( p1, p2, len / 8 )) return FALSE; + mask = 0xffu << (8 - (len % 8)); + if (!mask) return TRUE; + return (p1[len / 8] & mask) == (p2[len / 8] & mask); +} + +static MIB_UNICASTIPADDRESS_ROW *find_first_matching_unicast_addr( MIB_UNICASTIPADDRESS_TABLE *uni, BOOL v6, + const SOCKADDR_INET *src, const SOCKADDR_INET *dst, + NET_IFINDEX if_index ) +{ + unsigned int i; + + for (i = 0; i < uni->NumEntries; ++i) + { + if (if_index && uni->Table[i].InterfaceIndex != if_index) continue; + if (src) + { + if (v6) + { + if (src->Ipv6.sin6_scope_id && IN6_IS_ADDR_LINKLOCAL(&src->Ipv6.sin6_addr) + && src->Ipv6.sin6_scope_id != uni->Table[i].InterfaceIndex) continue; + if (memcmp( &src->Ipv6.sin6_addr, &uni->Table[i].Address.Ipv6.sin6_addr, sizeof(src->Ipv6.sin6_addr) )) + continue; + } + else if (src->Ipv4.sin_addr.s_addr != uni->Table[i].Address.Ipv4.sin_addr.s_addr) continue; + } + if (v6 && dst) + { + if (IN6_IS_ADDR_LINKLOCAL(&dst->Ipv6.sin6_addr) + != IN6_IS_ADDR_LINKLOCAL(&uni->Table[i].Address.Ipv6.sin6_addr)) + continue; + } + return &uni->Table[i]; + } + return NULL; +} + /****************************************************************** * GetBestRoute2 (IPHLPAPI.@) */ -DWORD WINAPI GetBestRoute2(NET_LUID *luid, NET_IFINDEX index, - const SOCKADDR_INET *source, const SOCKADDR_INET *destination, - ULONG options, PMIB_IPFORWARD_ROW2 bestroute, - SOCKADDR_INET *bestaddress) -{ - static int once; +DWORD WINAPI GetBestRoute2( NET_LUID *luid, NET_IFINDEX index, + const SOCKADDR_INET *src, const SOCKADDR_INET *dst, + ULONG options, PMIB_IPFORWARD_ROW2 bestroute, + SOCKADDR_INET *bestaddress ) +{ + MIB_UNICASTIPADDRESS_ROW *uni_row = NULL; + MIB_UNICASTIPADDRESS_TABLE *uni; + MIB_IPFORWARD_TABLE2 *fwd; + unsigned int i, best_idx; + int max_prefix_len; + DWORD ret; + BOOL v6; + + TRACE( "(%p, %ld, %p, %p, 0x%08lx, %p, %p).\n", luid, index, src, dst, options, bestroute, bestaddress ); + + if (!dst || !bestroute || !bestaddress) + return ERROR_INVALID_PARAMETER; + + memset( bestroute, 0, sizeof(*bestroute) ); + memset( bestaddress, 0, sizeof(*bestaddress) );
- if (!once++) - FIXME("(%p, %ld, %p, %p, 0x%08lx, %p, %p): stub\n", luid, index, source, - destination, options, bestroute, bestaddress); + if (dst->si_family != AF_INET && dst->si_family != AF_INET6) return ERROR_INVALID_PARAMETER; + v6 = dst->si_family == AF_INET6; + if (src) + { + if (src->si_family != dst->si_family) src = NULL; + else if (v6 && IN6_IS_ADDR_UNSPECIFIED(&src->Ipv6.sin6_addr)) src = NULL; + else if (!v6 && !src->Ipv4.sin_addr.s_addr) src = NULL; + }
- if (!destination || !bestroute || !bestaddress) + if (v6 && !IN6_IS_ADDR_LINKLOCAL(&dst->Ipv6.sin6_addr) && dst->Ipv6.sin6_scope_id) + return ERROR_INVALID_PARAMETER; + if (v6 && src && !IN6_IS_ADDR_LINKLOCAL(&src->Ipv6.sin6_addr) && src->Ipv6.sin6_scope_id) return ERROR_INVALID_PARAMETER;
- return ERROR_NOT_SUPPORTED; + if ((ret = GetUnicastIpAddressTable( dst->si_family, &uni ))) return ret; + if ((ret = GetIpForwardTable2( dst->si_family, &fwd ))) + { + FreeMibTable( &uni ); + return ret; + } + + if (!luid && index) + { + for (i = 0; i < uni->NumEntries; ++i) + { + if (uni->Table[i].InterfaceIndex == index) break; + } + if (i == uni->NumEntries) + { + ret = ERROR_FILE_NOT_FOUND; + goto done; + } + luid = &uni->Table[i].InterfaceLuid; + } + if (src && !(uni_row = find_first_matching_unicast_addr( uni, v6, src, NULL, 0 ))) + { + ret = ERROR_NOT_FOUND; + goto done; + } + if (!uni_row && luid && luid->Value) + { + for (i = 0; i < uni->NumEntries; ++i) + { + if (uni->Table[i].InterfaceLuid.Value == luid->Value) break; + } + if (i == uni->NumEntries) + { + ret = ERROR_NOT_FOUND; + goto done; + } + uni_row = &uni->Table[i]; + } + + if (uni_row) index = uni_row->InterfaceIndex; + else index = 0; + + if (v6) + { + if (!index) index = dst->Ipv6.sin6_scope_id; + if (IN6_IS_ADDR_LINKLOCAL(&dst->Ipv6.sin6_addr) && dst->Ipv6.sin6_scope_id + && dst->Ipv6.sin6_scope_id != index) + { + ret = ERROR_INVALID_PARAMETER; + goto done; + } + } + + max_prefix_len = -1; + best_idx = 0; + for (i = 0; i < fwd->NumEntries; ++i) + { + if (index && fwd->Table[i].InterfaceIndex != index) continue; + + if (match_ip_address_with_prefix( dst, &fwd->Table[i].DestinationPrefix ) + && max_prefix_len < fwd->Table[i].DestinationPrefix.PrefixLength ) + { + max_prefix_len = fwd->Table[i].DestinationPrefix.PrefixLength; + best_idx = i; + } + } + + if (max_prefix_len == -1) + { + ret = ERROR_NETWORK_UNREACHABLE; + goto done; + } + index = fwd->Table[best_idx].InterfaceIndex; + if (!fwd->Table[best_idx].Loopback && ((v6 && IN6_IS_ADDR_LOOPBACK(&dst->Ipv6.sin6_addr)) + || (!v6 && dst->Ipv4.sin_addr.S_un.S_un_b.s_b1 == 127))) + { + ret = ERROR_INVALID_PARAMETER; + goto done; + } + + if (!(uni_row = find_first_matching_unicast_addr( uni, v6, src, dst, index ))) + { + WARN( "Could not find source address.\n" ); + ret = ERROR_NOT_FOUND; + goto done; + } + *bestaddress = uni_row->Address; + *bestroute = fwd->Table[best_idx]; + + ret = ERROR_SUCCESS; +done: + FreeMibTable( fwd ); + FreeMibTable( uni ); + TRACE( "-> %lu.\n", ret ); + return ret; }
/****************************************************************** diff --git a/include/netioapi.h b/include/netioapi.h index 09824f946e4..9994e5b19ac 100644 --- a/include/netioapi.h +++ b/include/netioapi.h @@ -269,6 +269,9 @@ IPHLPAPI_DLL_LINKAGE DWORD WINAPI ConvertInterfaceNameToLuidW(const WCHAR*,NET_L IPHLPAPI_DLL_LINKAGE DWORD WINAPI ConvertLengthToIpv4Mask(ULONG,ULONG*); IPHLPAPI_DLL_LINKAGE void WINAPI FreeMibTable(void*); IPHLPAPI_DLL_LINKAGE DWORD WINAPI GetAnycastIpAddressTable(ADDRESS_FAMILY,MIB_ANYCASTIPADDRESS_TABLE**); +IPHLPAPI_DLL_LINKAGE DWORD WINAPI GetBestRoute2(NET_LUID *luid, NET_IFINDEX index, const SOCKADDR_INET *source, + const SOCKADDR_INET *destination, ULONG options, + PMIB_IPFORWARD_ROW2 bestroute, SOCKADDR_INET *bestaddress); IPHLPAPI_DLL_LINKAGE NET_IF_COMPARTMENT_ID WINAPI GetCurrentThreadCompartmentId(void); IPHLPAPI_DLL_LINKAGE DWORD WINAPI GetIfEntry2(MIB_IF_ROW2*); IPHLPAPI_DLL_LINKAGE DWORD WINAPI GetIfEntry2Ex(MIB_IF_TABLE_LEVEL,MIB_IF_ROW2*);