/* Copyright (C) 2003 Juan Lang * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Implementation notes * Interface index fun: * - Windows may rely on an index being cleared in the topmost 8 bits in some * APIs; see GetFriendlyIfIndex and the mention of "backward compatible" * indexes. It isn't clear which APIs might fail with non-backward-compatible * indexes, but I'll keep them bits clear just in case. * - Even though if_nametoindex and if_indextoname seem to be pretty portable, * Linux, at any rate, uses the same interface index for all virtual * interfaces of a real interface as well as for the real interface itself. * If I used the Linux index as my index, this would break my statement that * an index is a key, and that an interface has 0 or 1 IP addresses. * If that behavior were consistent across UNIXen (I don't know), it could * help me implement multiple IP addresses more in the Windows way. * But here's a problem with doing so: * - Netbios() has a concept of an LAN adapter number (LANA), which is an 8-bit * number in the range 0-254, inclusive. The MSDN pages for Netbios() says * the original Netbios() spec allowed only 0 or 1 to be used, though "new" * applications should enumerate available adapters rather than assuming 0 * is the default adapter. * I'm concerned that some old application might depend on being able to get * "the" MAC address of a machine by opening LANA 0 and getting its MAC * address. This also implies LANA 0 should correspond to a non-loopback * interface. * On Linux, the if_nametoindex index is 1-based, and "lo" typically has * index 1. * I could make netapi32 do its own LANA map, independent of my index * assignment, but it seems simpler just to assign 0-based indexes and put * non-loopback adapters first, so the first 255 indexes (!) on a system will * automatically map to LANA numbers without difficulty. * - One more argument for doing it this way, if you don't buy the Netbios() * argument: WsControl() (in wsock32) uses the same index to refer to an IP * address and an interface. If I assigned multiple IP addresses to an * interface, wsock32 would have to maintain a table of IP addresses with its * own indexing scheme. No thanks. * * There are three implemened methods for determining the MAC address of an * interface: * - a specific IOCTL (Linux) * - looking in the ARP cache (at least Solaris) * - using the sysctl interface (FreeBSD and MacOSX) * Solaris and some others have SIOCGENADDR, but I haven't gotten that to work * on the Solaris boxes at SourceForge's compile farm, whereas SIOCGARP does. */ #include "config.h" #include #include #include #ifdef HAVE_UNISTD_H #include #endif #include #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_ARPA_INET_H #include #endif #ifdef HAVE_NET_IF_H #include #endif #ifdef HAVE_NET_IF_ARP_H #include #endif #ifdef HAVE_NET_ROUTE_H #include #endif #ifdef HAVE_SYS_IOCTL_H #include #endif #ifdef HAVE_SYS_SYSCTL_H #include #endif #ifdef HAVE_SYS_SOCKIO_H #include #endif #ifdef HAVE_NET_IF_DL_H #include #endif #ifdef HAVE_NET_IF_TYPES_H #include #endif #include "winbase.h" #include "iprtrmib.h" #include "ifenum.h" #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN #define ifreq_len(ifr) \ max(sizeof(struct ifreq), sizeof((ifr)->ifr_name)+(ifr)->ifr_addr.sa_len) #else #define ifreq_len(ifr) sizeof(struct ifreq) #endif #ifndef ETH_ALEN #define ETH_ALEN 6 #endif #ifndef INADDR_NONE #define INADDR_NONE (~0U) #endif #define INITIAL_INTERFACES_ASSUMED 4 #define INDEX_IS_LOOPBACK 0x00800000 /* Type declarations */ typedef struct _InterfaceNameMapEntry { char name[IFNAMSIZ]; BOOL inUse; BOOL usedLastPass; } InterfaceNameMapEntry; typedef struct _InterfaceNameMap { DWORD numInterfaces; DWORD nextAvailable; DWORD numAllocated; InterfaceNameMapEntry table[1]; } InterfaceNameMap; /* Global variables */ static InterfaceNameMap *gNonLoopbackInterfaceMap = NULL; static InterfaceNameMap *gLoopbackInterfaceMap = NULL; /* Functions */ /* Sizes the passed-in map to have enough space for numInterfaces interfaces. * If map is NULL, allocates a new map. If it is not, may reallocate the * existing map and return a map of increased size. Returns the allocated map, * or NULL if it could not allocate a map of the requested size. */ InterfaceNameMap *sizeMap(InterfaceNameMap *map, DWORD numInterfaces) { if (!map) { numInterfaces = max(numInterfaces, INITIAL_INTERFACES_ASSUMED); map = (InterfaceNameMap *)calloc(1, sizeof(InterfaceNameMap) + (numInterfaces - 1) * sizeof(InterfaceNameMapEntry)); if (map) map->numAllocated = numInterfaces; } else { if (map->numAllocated < numInterfaces) { map = (InterfaceNameMap *)realloc(map, sizeof(InterfaceNameMap) + (numInterfaces - 1) * sizeof(InterfaceNameMapEntry)); if (map) memset(&map->table[map->numAllocated], 0, (numInterfaces - map->numAllocated) * sizeof(InterfaceNameMapEntry)); } } return map; } static int isLoopbackInterface(int fd, const char *name) { int ret = 0; if (name) { struct ifreq ifr; strncpy(ifr.ifr_name, name, IFNAMSIZ); ifr.ifr_name[IFNAMSIZ-1] = '\0'; if (ioctl(fd, SIOCGIFFLAGS, &ifr) == 0) ret = ifr.ifr_flags & IFF_LOOPBACK; } return ret; } static void countInterfaces(int fd, caddr_t buf, size_t len) { caddr_t ifPtr = buf; DWORD numNonLoopbackInterfaces = 0, numLoopbackInterfaces = 0; while (ifPtr && ifPtr < buf + len) { struct ifreq *ifr = (struct ifreq *)ifPtr; if (isLoopbackInterface(fd, ifr->ifr_name)) numLoopbackInterfaces++; else numNonLoopbackInterfaces++; ifPtr += ifreq_len(ifr); } gNonLoopbackInterfaceMap = sizeMap(gNonLoopbackInterfaceMap, numNonLoopbackInterfaces); gLoopbackInterfaceMap = sizeMap(gLoopbackInterfaceMap, numLoopbackInterfaces); } /* Stores the name in the given map, and increments the map's numInterfaces * member if stored successfully. Will store in the same slot as previously if * usedLastPass is set, otherwise will store in a new slot. * Assumes map and name are not NULL, and the usedLastPass flag is set * correctly for each entry in the map, and that map->numInterfaces < * map->numAllocated. * FIXME: this is kind of expensive, doing a linear scan of the map with a * string comparison of each entry to find the old slot. */ static void storeInterfaceInMap(InterfaceNameMap *map, const char *name) { if (map && name) { DWORD ndx; BOOL stored = FALSE; /* look for previous slot, mark in use if so */ for (ndx = 0; !stored && ndx < map->nextAvailable; ndx++) { if (map->table[ndx].usedLastPass && !strncmp(map->table[ndx].name, name, sizeof(map->table[ndx].name))) { map->table[ndx].inUse = TRUE; stored = TRUE; } } /* look for new slot */ for (ndx = 0; !stored && ndx < map->numAllocated; ndx++) { if (!map->table[ndx].inUse) { strncpy(map->table[ndx].name, name, IFNAMSIZ); map->table[ndx].name[IFNAMSIZ-1] = '\0'; map->table[ndx].inUse = TRUE; stored = TRUE; if (ndx >= map->nextAvailable) map->nextAvailable = ndx + 1; } } if (stored) map->numInterfaces++; } } /* Sets all used entries' usedLastPass flag to their inUse flag, clears * their inUse flag, and clears their numInterfaces member. */ static void markOldInterfaces(InterfaceNameMap *map) { if (map) { DWORD ndx; map->numInterfaces = 0; for (ndx = 0; ndx < map->nextAvailable; ndx++) { map->table[ndx].usedLastPass = map->table[ndx].inUse; map->table[ndx].inUse = FALSE; } } } static void classifyInterfaces(int fd, caddr_t buf, size_t len) { caddr_t ifPtr = buf; markOldInterfaces(gNonLoopbackInterfaceMap); markOldInterfaces(gLoopbackInterfaceMap); while (ifPtr && ifPtr < buf + len) { struct ifreq *ifr = (struct ifreq *)ifPtr; if (isLoopbackInterface(fd, ifr->ifr_name)) storeInterfaceInMap(gLoopbackInterfaceMap, ifr->ifr_name); else storeInterfaceInMap(gNonLoopbackInterfaceMap, ifr->ifr_name); ifPtr += ifreq_len(ifr); } } static void enumerateInterfaces(void) { int fd; fd = socket(PF_INET, SOCK_DGRAM, 0); if (fd != -1) { int ret, guessedNumInterfaces; struct ifconf ifc; /* try to avoid silly heap action by starting with the right size buffer */ guessedNumInterfaces = 0; if (gNonLoopbackInterfaceMap) guessedNumInterfaces += gNonLoopbackInterfaceMap->numInterfaces; if (gLoopbackInterfaceMap) guessedNumInterfaces += gLoopbackInterfaceMap->numInterfaces; ret = 0; memset(&ifc, 0, sizeof(ifc)); /* there is no way to know the interface count beforehand, so we need to loop again and again upping our max each time until returned < max */ do { if (guessedNumInterfaces == 0) guessedNumInterfaces = INITIAL_INTERFACES_ASSUMED; else guessedNumInterfaces *= 2; if (ifc.ifc_buf) free(ifc.ifc_buf); ifc.ifc_len = sizeof(struct ifreq) * guessedNumInterfaces; ifc.ifc_buf = (char *)malloc(ifc.ifc_len); ret = ioctl(fd, SIOCGIFCONF, &ifc); } while (ret == 0 && ifc.ifc_len == (sizeof(struct ifreq) * guessedNumInterfaces)); if (ret == 0) { countInterfaces(fd, ifc.ifc_buf, ifc.ifc_len); classifyInterfaces(fd, ifc.ifc_buf, ifc.ifc_len); } if (ifc.ifc_buf) free(ifc.ifc_buf); close(fd); } } DWORD getNumNonLoopbackInterfaces(void) { enumerateInterfaces(); return gNonLoopbackInterfaceMap ? gNonLoopbackInterfaceMap->numInterfaces : 0; } DWORD getNumInterfaces(void) { DWORD ret = getNumNonLoopbackInterfaces(); ret += gLoopbackInterfaceMap ? gLoopbackInterfaceMap->numInterfaces : 0; return ret; } const char *getInterfaceNameByIndex(DWORD index) { DWORD realIndex; InterfaceNameMap *map; const char *ret = NULL; if (index & INDEX_IS_LOOPBACK) { realIndex = index ^ INDEX_IS_LOOPBACK; map = gLoopbackInterfaceMap; } else { realIndex = index; map = gNonLoopbackInterfaceMap; } if (map && realIndex < map->nextAvailable) ret = map->table[realIndex].name; return ret; } DWORD getInterfaceIndexByName(const char *name, PDWORD index) { DWORD ndx; BOOL found = FALSE; if (!name) return ERROR_INVALID_PARAMETER; if (!index) return ERROR_INVALID_PARAMETER; for (ndx = 0; !found && gNonLoopbackInterfaceMap && ndx < gNonLoopbackInterfaceMap->nextAvailable; ndx++) if (!strncmp(gNonLoopbackInterfaceMap->table[ndx].name, name, IFNAMSIZ)) { found = TRUE; *index = ndx; } for (ndx = 0; !found && gLoopbackInterfaceMap && ndx < gLoopbackInterfaceMap->nextAvailable; ndx++) if (!strncmp(gLoopbackInterfaceMap->table[ndx].name, name, IFNAMSIZ)) { found = TRUE; *index = ndx | INDEX_IS_LOOPBACK; } if (found) return NO_ERROR; else return ERROR_INVALID_DATA; } static void addMapEntriesToIndexTable(InterfaceIndexTable *table, const InterfaceNameMap *map) { if (table && map) { DWORD ndx; for (ndx = 0; ndx < map->nextAvailable && table->numIndexes < table->numAllocated; ndx++) if (map->table[ndx].inUse) { DWORD externalNdx = ndx; if (map == gLoopbackInterfaceMap) externalNdx |= INDEX_IS_LOOPBACK; table->indexes[table->numIndexes++] = externalNdx; } } } InterfaceIndexTable *getInterfaceIndexTable(void) { DWORD numInterfaces = getNumInterfaces(); InterfaceIndexTable *ret = (InterfaceIndexTable *)calloc(1, sizeof(InterfaceIndexTable) + (numInterfaces - 1) * sizeof(DWORD)); if (ret) { ret->numAllocated = numInterfaces; addMapEntriesToIndexTable(ret, gNonLoopbackInterfaceMap); addMapEntriesToIndexTable(ret, gLoopbackInterfaceMap); } return ret; } InterfaceIndexTable *getNonLoopbackInterfaceIndexTable(void) { DWORD numInterfaces = getNumNonLoopbackInterfaces(); InterfaceIndexTable *ret = (InterfaceIndexTable *)calloc(1, sizeof(InterfaceIndexTable) + (numInterfaces - 1) * sizeof(DWORD)); if (ret) { ret->numAllocated = numInterfaces; addMapEntriesToIndexTable(ret, gNonLoopbackInterfaceMap); } return ret; } DWORD getInterfaceIPAddrByName(const char *name) { DWORD ret = INADDR_ANY; if (name) { int fd = socket(PF_INET, SOCK_DGRAM, 0); if (fd != -1) { struct ifreq ifr; strncpy(ifr.ifr_name, name, IFNAMSIZ); ifr.ifr_name[IFNAMSIZ-1] = '\0'; if (ioctl(fd, SIOCGIFADDR, &ifr) == 0) memcpy(&ret, ifr.ifr_addr.sa_data + 2, sizeof(DWORD)); close(fd); } } return ret; } DWORD getInterfaceIPAddrByIndex(DWORD index) { DWORD ret; const char *name = getInterfaceNameByIndex(index); if (name) ret = getInterfaceIPAddrByName(name); else ret = INADDR_ANY; return ret; } DWORD getInterfaceBCastAddrByName(const char *name) { DWORD ret = INADDR_ANY; if (name) { int fd = socket(PF_INET, SOCK_DGRAM, 0); if (fd != -1) { struct ifreq ifr; strncpy(ifr.ifr_name, name, IFNAMSIZ); ifr.ifr_name[IFNAMSIZ-1] = '\0'; if (ioctl(fd, SIOCGIFBRDADDR, &ifr) == 0) memcpy(&ret, ifr.ifr_addr.sa_data + 2, sizeof(DWORD)); close(fd); } } return ret; } DWORD getInterfaceBCastAddrByIndex(DWORD index) { DWORD ret; const char *name = getInterfaceNameByIndex(index); if (name) ret = getInterfaceBCastAddrByName(name); else ret = INADDR_ANY; return ret; } DWORD getInterfaceMaskByName(const char *name) { DWORD ret = INADDR_NONE; if (name) { int fd = socket(PF_INET, SOCK_DGRAM, 0); if (fd != -1) { struct ifreq ifr; strncpy(ifr.ifr_name, name, IFNAMSIZ); ifr.ifr_name[IFNAMSIZ-1] = '\0'; if (ioctl(fd, SIOCGIFNETMASK, &ifr) == 0) memcpy(&ret, ifr.ifr_addr.sa_data + 2, sizeof(DWORD)); close(fd); } } return ret; } DWORD getInterfaceMaskByIndex(DWORD index) { DWORD ret; const char *name = getInterfaceNameByIndex(index); if (name) ret = getInterfaceMaskByName(name); else ret = INADDR_NONE; return ret; } #if defined (SIOCGIFHWADDR) DWORD getInterfacePhysicalByName(const char *name, PDWORD len, PBYTE addr, PDWORD type) { DWORD ret; int fd; if (!name || !len || !addr || !type) return ERROR_INVALID_PARAMETER; fd = socket(PF_INET, SOCK_DGRAM, 0); if (fd != -1) { struct ifreq ifr; memset(&ifr, 0, sizeof(struct ifreq)); strncpy(ifr.ifr_name, name, IFNAMSIZ); ifr.ifr_name[IFNAMSIZ-1] = '\0'; if ((ioctl(fd, SIOCGIFHWADDR, &ifr))) ret = ERROR_INVALID_DATA; else { int addrLen; switch (ifr.ifr_hwaddr.sa_family) { case ARPHRD_LOOPBACK: addrLen = 0; *type = MIB_IF_TYPE_LOOPBACK; break; case ARPHRD_ETHER: addrLen = ETH_ALEN; *type = MIB_IF_TYPE_ETHERNET; break; case ARPHRD_FDDI: addrLen = ETH_ALEN; *type = MIB_IF_TYPE_FDDI; break; case ARPHRD_IEEE802: /* 802.2 Ethernet && Token Ring, guess TR? */ addrLen = ETH_ALEN; *type = MIB_IF_TYPE_TOKENRING; break; case ARPHRD_IEEE802_TR: /* also Token Ring? */ addrLen = ETH_ALEN; *type = MIB_IF_TYPE_TOKENRING; break; case ARPHRD_SLIP: addrLen = 0; *type = MIB_IF_TYPE_SLIP; break; case ARPHRD_PPP: addrLen = 0; *type = MIB_IF_TYPE_PPP; break; default: addrLen = min(MAX_INTERFACE_PHYSADDR, sizeof(ifr.ifr_hwaddr.sa_data)); *type = MIB_IF_TYPE_OTHER; } if (addrLen > *len) { ret = ERROR_INSUFFICIENT_BUFFER; *len = addrLen; } else { if (addrLen > 0) memcpy(addr, ifr.ifr_hwaddr.sa_data, addrLen); /* zero out remaining bytes for broken implementations */ memset(addr + addrLen, 0, *len - addrLen); *len = addrLen; ret = NO_ERROR; } } close(fd); } else ret = ERROR_NO_MORE_FILES; return ret; } #elif defined (SIOCGARP) DWORD getInterfacePhysicalByName(const char *name, PDWORD len, PBYTE addr, PDWORD type) { DWORD ret; int fd; if (!name || !len || !addr || !type) return ERROR_INVALID_PARAMETER; fd = socket(PF_INET, SOCK_DGRAM, 0); if (fd != -1) { if (isLoopbackInterface(fd, name)) { *type = MIB_IF_TYPE_LOOPBACK; memset(addr, 0, *len); *len = 0; ret=NOERROR; } else { struct arpreq arp; struct sockaddr_in *saddr; memset(&arp, 0, sizeof(struct arpreq)); arp.arp_pa.sa_family = AF_INET; saddr = (struct sockaddr_in *)&arp; /* proto addr is first member */ saddr->sin_family = AF_INET; saddr->sin_addr.s_addr = getInterfaceIPAddrByName(name); if ((ioctl(fd, SIOCGARP, &arp))) ret = ERROR_INVALID_DATA; else { /* FIXME: heh: who said it was ethernet? */ int addrLen = ETH_ALEN; if (addrLen > *len) { ret = ERROR_INSUFFICIENT_BUFFER; *len = addrLen; } else { if (addrLen > 0) memcpy(addr, &arp.arp_ha.sa_data[0], addrLen); /* zero out remaining bytes for broken implementations */ memset(addr + addrLen, 0, *len - addrLen); *len = addrLen; *type = MIB_IF_TYPE_ETHERNET; ret = NO_ERROR; } } } close(fd); } else ret = ERROR_NO_MORE_FILES; return ret; } #elif defined (HAVE_SYS_SYSCTL_H) && defined (HAVE_NET_IF_DL_H) DWORD getInterfacePhysicalByName(const char *name, PDWORD len, PBYTE addr, PDWORD type) { DWORD ret; struct if_msghdr *ifm; struct sockaddr_dl *sdl; u_char *p, *buf; size_t mibLen; int mib[] = { CTL_NET, AF_ROUTE, 0, AF_LINK, NET_RT_IFLIST, 0 }; int addrLen; BOOL found = FALSE; if (!name || !len || !addr || !type) return ERROR_INVALID_PARAMETER; if (sysctl(mib, 6, NULL, &mibLen, NULL, 0) < 0) return ERROR_NO_MORE_FILES; buf = (u_char *)malloc(mibLen); if (!buf) return ERROR_NOT_ENOUGH_MEMORY; if (sysctl(mib, 6, buf, &mibLen, NULL, 0) < 0) { free(buf); return ERROR_NO_MORE_FILES; } ret = ERROR_INVALID_DATA; for (p = buf; !found && p < buf + mibLen; p += ifm->ifm_msglen) { ifm = (struct if_msghdr *)p; sdl = (struct sockaddr_dl *)(ifm + 1); if (ifm->ifm_type != RTM_IFINFO || (ifm->ifm_addrs & RTA_IFP) == 0) continue; if (sdl->sdl_family != AF_LINK || sdl->sdl_nlen == 0 || memcmp(sdl->sdl_data, name, max(sdl->sdl_nlen, strlen(name))) != 0) continue; found = TRUE; addrLen = min(MAX_INTERFACE_PHYSADDR, sdl->sdl_alen); if (addrLen > *len) { ret = ERROR_INSUFFICIENT_BUFFER; *len = addrLen; } else { if (addrLen > 0) memcpy(addr, LLADDR(sdl), addrLen); /* zero out remaining bytes for broken implementations */ memset(addr + addrLen, 0, *len - addrLen); *len = addrLen; #if defined(HAVE_NET_IF_TYPES_H) switch (sdl->sdl_type) { case IFT_ETHER: *type = MIB_IF_TYPE_ETHERNET; break; case IFT_FDDI: *type = MIB_IF_TYPE_FDDI; break; case IFT_ISO88024: /* Token Bus */ *type = MIB_IF_TYPE_TOKENRING; break; case IFT_ISO88025: /* Token Ring */ *type = MIB_IF_TYPE_TOKENRING; break; case IFT_PPP: *type = MIB_IF_TYPE_PPP; break; case IFT_SLIP: *type = MIB_IF_TYPE_SLIP; break; case IFT_LOOP: *type = MIB_IF_TYPE_LOOPBACK; break; default: *type = MIB_IF_TYPE_OTHER; } #else /* default if we don't know */ *type = MIB_IF_TYPE_ETHERNET; #endif ret = NO_ERROR; } } free(buf); return ret; } #endif DWORD getInterfacePhysicalByIndex(DWORD index, PDWORD len, PBYTE addr, PDWORD type) { const char *name = getInterfaceNameByIndex(index); if (name) return getInterfacePhysicalByName(name, len, addr, type); else return ERROR_INVALID_DATA; } DWORD getInterfaceMtuByName(const char *name, PDWORD mtu) { DWORD ret; int fd; if (!name) return ERROR_INVALID_PARAMETER; if (!mtu) return ERROR_INVALID_PARAMETER; fd = socket(PF_INET, SOCK_DGRAM, 0); if (fd != -1) { struct ifreq ifr; strncpy(ifr.ifr_name, name, IFNAMSIZ); ifr.ifr_name[IFNAMSIZ-1] = '\0'; if ((ioctl(fd, SIOCGIFMTU, &ifr))) ret = ERROR_INVALID_DATA; else { *mtu = ifr.ifr_mtu; ret = NO_ERROR; } } else ret = ERROR_NO_MORE_FILES; return ret; } DWORD getInterfaceMtuByIndex(DWORD index, PDWORD mtu) { const char *name = getInterfaceNameByIndex(index); if (name) return getInterfaceMtuByName(name, mtu); else return ERROR_INVALID_DATA; } DWORD getInterfaceStatusByName(const char *name, PDWORD status) { DWORD ret; int fd; if (!name) return ERROR_INVALID_PARAMETER; if (!status) return ERROR_INVALID_PARAMETER; fd = socket(PF_INET, SOCK_DGRAM, 0); if (fd != -1) { struct ifreq ifr; strncpy(ifr.ifr_name, name, IFNAMSIZ); ifr.ifr_name[IFNAMSIZ-1] = '\0'; if ((ioctl(fd, SIOCGIFFLAGS, &ifr))) ret = ERROR_INVALID_DATA; else { if (ifr.ifr_flags & IFF_UP) *status = MIB_IF_OPER_STATUS_OPERATIONAL; else *status = MIB_IF_OPER_STATUS_NON_OPERATIONAL; ret = NO_ERROR; } } else ret = ERROR_NO_MORE_FILES; return ret; } DWORD getInterfaceStatusByIndex(DWORD index, PDWORD status) { const char *name = getInterfaceNameByIndex(index); if (name) return getInterfaceStatusByName(name, status); else return ERROR_INVALID_DATA; } DWORD getInterfaceEntryByName(const char *name, PMIB_IFROW entry) { BYTE addr[MAX_INTERFACE_PHYSADDR]; DWORD ret, len = sizeof(addr), type; if (!name) return ERROR_INVALID_PARAMETER; if (!entry) return ERROR_INVALID_PARAMETER; if (getInterfacePhysicalByName(name, &len, addr, &type) == NO_ERROR) { WCHAR *assigner; const char *walker; memset(entry, 0, sizeof(MIB_IFROW)); for (assigner = entry->wszName, walker = name; *walker; walker++, assigner++) *assigner = *walker; *assigner = 0; getInterfaceIndexByName(name, &entry->dwIndex); entry->dwPhysAddrLen = len; memcpy(entry->bPhysAddr, addr, len); memset(entry->bPhysAddr + len, 0, sizeof(entry->bPhysAddr) - len); entry->dwType = type; /* FIXME: how to calculate real speed? */ getInterfaceMtuByName(name, &entry->dwMtu); /* lie, there's no "administratively down" here */ entry->dwAdminStatus = MIB_IF_ADMIN_STATUS_UP; getInterfaceStatusByName(name, &entry->dwOperStatus); /* punt on dwLastChange? */ entry->dwDescrLen = min(strlen(name), MAX_INTERFACE_DESCRIPTION - 1); memcpy(entry->bDescr, name, entry->dwDescrLen); entry->bDescr[entry->dwDescrLen] = '\0'; entry->dwDescrLen++; ret = NO_ERROR; } else ret = ERROR_INVALID_DATA; return ret; } DWORD getInterfaceEntryByIndex(DWORD index, PMIB_IFROW entry) { const char *name = getInterfaceNameByIndex(index); if (name) return getInterfaceEntryByName(name, entry); else return ERROR_INVALID_DATA; } char *toIPAddressString(unsigned int addr, char string[16]) { if (string) { struct in_addr iAddr; iAddr.s_addr = addr; /* extra-anal, just to make auditors happy */ strncpy(string, inet_ntoa(iAddr), 16); string[16] = '\0'; } return string; }