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Diffstat (limited to 'include')
| -rwxr-xr-x | include/wspiapi.h | 999 |
1 files changed, 999 insertions, 0 deletions
diff --git a/include/wspiapi.h b/include/wspiapi.h new file mode 100755 index 00000000..eaa4ec2f --- /dev/null +++ b/include/wspiapi.h @@ -0,0 +1,999 @@ +/*++ + +Copyright (c) 2000, Microsoft Corporation + +Module Name: + wspiapi.h + +Abstract: + The file contains protocol independent API functions. + +Revision History: + Wed Jul 12 10:50:31 2000, Created + +--*/ + +#ifndef _WSPIAPI_H_ +#define _WSPIAPI_H_ + +#include <stdio.h> // sprintf() +#include <stdlib.h> // calloc(), strtoul() +#include <malloc.h> // calloc() +#include <string.h> // strlen(), strcmp(), strstr() + +#define WspiapiMalloc(tSize) calloc(1, (tSize)) +#define WspiapiFree(p) free(p) +#define WspiapiSwap(a, b, c) { (c) = (a); (a) = (b); (b) = (c); } +#define getaddrinfo WspiapiGetAddrInfo +#define getnameinfo WspiapiGetNameInfo +#define freeaddrinfo WspiapiFreeAddrInfo + +typedef int (WINAPI *WSPIAPI_PGETADDRINFO) ( + IN const char *nodename, + IN const char *servname, + IN const struct addrinfo *hints, + OUT struct addrinfo **res); + +typedef int (WINAPI *WSPIAPI_PGETNAMEINFO) ( + IN const struct sockaddr *sa, + IN socklen_t salen, + OUT char *host, + IN size_t hostlen, + OUT char *serv, + IN size_t servlen, + IN int flags); + +typedef void (WINAPI *WSPIAPI_PFREEADDRINFO) ( + IN struct addrinfo *ai); + + + +#ifdef __cplusplus +extern "C" { +#endif + +//////////////////////////////////////////////////////////// +// v4 only versions of getaddrinfo and friends. +// NOTE: gai_strerror is inlined in ws2tcpip.h +//////////////////////////////////////////////////////////// + +__inline +char * +WINAPI +WspiapiStrdup ( + IN const char * pszString) +/*++ + +Routine Description + allocates enough storage via calloc() for a copy of the string, + copies the string into the new memory, and returns a pointer to it. + +Arguments + pszString string to copy into new memory + +Return Value + a pointer to the newly allocated storage with the string in it. + NULL if enough memory could not be allocated, or string was NULL. + +--*/ +{ + char *pszMemory; + + if (!pszString) + return(NULL); + + pszMemory = (char *) WspiapiMalloc(strlen(pszString) + 1); + if (!pszMemory) + return(NULL); + + return(strcpy(pszMemory, pszString)); +} + + + +__inline +BOOL +WINAPI +WspiapiParseV4Address ( + IN const char * pszAddress, + OUT PDWORD pdwAddress) +/*++ + +Routine Description + get the IPv4 address (in network byte order) from its string + representation. the syntax should be a.b.c.d. + +Arguments + pszArgument string representation of the IPv4 address + ptAddress pointer to the resulting IPv4 address + +Return Value + Returns FALSE if there is an error, TRUE for success. + +--*/ +{ + DWORD dwAddress = 0; + const char *pcNext = NULL; + int iCount = 0; + + // ensure there are 3 '.' (periods) + for (pcNext = pszAddress; *pcNext != '\0'; pcNext++) + if (*pcNext == '.') + iCount++; + if (iCount != 3) + return FALSE; + + // return an error if dwAddress is INADDR_NONE (255.255.255.255) + // since this is never a valid argument to getaddrinfo. + dwAddress = inet_addr(pszAddress); + if (dwAddress == INADDR_NONE) + return FALSE; + + *pdwAddress = dwAddress; + return TRUE; +} + + + +__inline +struct addrinfo * +WINAPI +WspiapiNewAddrInfo ( + IN int iSocketType, + IN int iProtocol, + IN WORD wPort, + IN DWORD dwAddress) +/*++ + +Routine Description + allocate an addrinfo structure and populate fields. + IPv4 specific internal function, not exported. + +Arguments + iSocketType SOCK_*. can be wildcarded (zero). + iProtocol IPPROTO_*. can be wildcarded (zero). + wPort port number of service (in network order). + dwAddress IPv4 address (in network order). + +Return Value + returns an addrinfo struct, or NULL if out of memory. + +--*/ +{ + struct addrinfo *ptNew; + struct sockaddr_in *ptAddress; + + // allocate a new addrinfo structure. + ptNew = + (struct addrinfo *) WspiapiMalloc(sizeof(struct addrinfo)); + if (!ptNew) + return NULL; + + ptAddress = + (struct sockaddr_in *) WspiapiMalloc(sizeof(struct sockaddr_in)); + if (!ptAddress) + { + WspiapiFree(ptNew); + return NULL; + } + ptAddress->sin_family = AF_INET; + ptAddress->sin_port = wPort; + ptAddress->sin_addr.s_addr = dwAddress; + + // fill in the fields... + ptNew->ai_family = PF_INET; + ptNew->ai_socktype = iSocketType; + ptNew->ai_protocol = iProtocol; + ptNew->ai_addrlen = sizeof(struct sockaddr_in); + ptNew->ai_addr = (struct sockaddr *) ptAddress; + + return ptNew; +} + + + +__inline +int +WINAPI +WspiapiQueryDNS( + IN const char *pszNodeName, + IN int iSocketType, + IN int iProtocol, + IN WORD wPort, + OUT char *pszAlias, + OUT struct addrinfo **pptResult) +/*++ + +Routine Description + helper routine for WspiapiLookupNode. + performs name resolution by querying the DNS for A records. + *pptResult would need to be freed if an error is returned. + +Arguments + pszNodeName name of node to resolve. + iSocketType SOCK_*. can be wildcarded (zero). + iProtocol IPPROTO_*. can be wildcarded (zero). + wPort port number of service (in network order). + pszAlias where to return the alias. + pptResult where to return the result. + +Return Value + Returns 0 on success, an EAI_* style error value otherwise. + +--*/ +{ + struct addrinfo **pptNext = pptResult; + struct hostent *ptHost = NULL; + char **ppAddresses; + + *pptNext = NULL; + pszAlias[0] = '\0'; + + ptHost = gethostbyname(pszNodeName); + if (ptHost) + { + if ((ptHost->h_addrtype == AF_INET) && + (ptHost->h_length == sizeof(struct in_addr))) + { + for (ppAddresses = ptHost->h_addr_list; + *ppAddresses != NULL; + ppAddresses++) + { + // create an addrinfo structure... + *pptNext = WspiapiNewAddrInfo( + iSocketType, + iProtocol, + wPort, + ((struct in_addr *) *ppAddresses)->s_addr); + if (!*pptNext) + return EAI_MEMORY; + + pptNext = &((*pptNext)->ai_next); + } + } + + // pick up the canonical name. + strcpy(pszAlias, ptHost->h_name); + return 0; + } + + switch (WSAGetLastError()) + { + case WSAHOST_NOT_FOUND: return EAI_NONAME; + case WSATRY_AGAIN: return EAI_AGAIN; + case WSANO_RECOVERY: return EAI_FAIL; + case WSANO_DATA: return EAI_NODATA; + default: return EAI_NONAME; + } +} + + + +__inline +int +WINAPI +WspiapiLookupNode( + IN const char *pszNodeName, + IN int iSocketType, + IN int iProtocol, + IN WORD wPort, + IN BOOL bAI_CANONNAME, + OUT struct addrinfo **pptResult) +/*++ + +Routine Description + resolve a nodename and return a list of addrinfo structures. + IPv4 specific internal function, not exported. + *pptResult would need to be freed if an error is returned. + + NOTE: if bAI_CANONNAME is true, the canonical name should be + returned in the first addrinfo structure. + +Arguments + pszNodeName name of node to resolve. + iSocketType SOCK_*. can be wildcarded (zero). + iProtocol IPPROTO_*. can be wildcarded (zero). + wPort port number of service (in network order). + bAI_CANONNAME whether the AI_CANONNAME flag is set. + pptResult where to return result. + +Return Value + Returns 0 on success, an EAI_* style error value otherwise. + +--*/ +{ + int iError = 0; + int iAliasCount = 0; + + char szFQDN1[NI_MAXHOST] = ""; + char szFQDN2[NI_MAXHOST] = ""; + char *pszName = szFQDN1; + char *pszAlias = szFQDN2; + char *pszScratch = NULL; + strcpy(pszName, pszNodeName); + + for (;;) + { + iError = WspiapiQueryDNS(pszNodeName, + iSocketType, + iProtocol, + wPort, + pszAlias, + pptResult); + if (iError) + break; + + // if we found addresses, then we are done. + if (*pptResult) + break; + + // stop infinite loops due to DNS misconfiguration. there appears + // to be no particular recommended limit in RFCs 1034 and 1035. + if ((!strlen(pszAlias)) || + (!strcmp(pszName, pszAlias)) || + (++iAliasCount == 16)) + { + iError = EAI_FAIL; + break; + } + + // there was a new CNAME, look again. + WspiapiSwap(pszName, pszAlias, pszScratch); + } + + if (!iError && bAI_CANONNAME) + { + (*pptResult)->ai_canonname = WspiapiStrdup(pszAlias); + if (!(*pptResult)->ai_canonname) + iError = EAI_MEMORY; + } + + return iError; +} + + + +__inline +int +WINAPI +WspiapiClone ( + IN WORD wPort, + IN struct addrinfo *ptResult) +/*++ + +Routine Description + clone every addrinfo structure in ptResult for the UDP service. + ptResult would need to be freed if an error is returned. + +Arguments + wPort port number of UDP service. + ptResult list of addrinfo structures, each + of whose node needs to be cloned. + +Return Value + Returns 0 on success, an EAI_MEMORY on allocation failure. + +--*/ +{ + struct addrinfo *ptNext = NULL; + struct addrinfo *ptNew = NULL; + + for (ptNext = ptResult; ptNext != NULL; ) + { + // create an addrinfo structure... + ptNew = WspiapiNewAddrInfo( + SOCK_DGRAM, + ptNext->ai_protocol, + wPort, + ((struct sockaddr_in *) ptNext->ai_addr)->sin_addr.s_addr); + if (!ptNew) + break; + + // link the cloned addrinfo + ptNew->ai_next = ptNext->ai_next; + ptNext->ai_next = ptNew; + ptNext = ptNew->ai_next; + } + + if (ptNext != NULL) + return EAI_MEMORY; + + return 0; +} + + + +__inline +void +WINAPI +WspiapiLegacyFreeAddrInfo ( + IN struct addrinfo *ptHead) +/*++ + +Routine Description + Free an addrinfo structure (or chain of structures). + As specified in RFC 2553, Section 6.4. + +Arguments + ptHead structure (chain) to free + +--*/ +{ + struct addrinfo *ptNext; // next strcture to free + + for (ptNext = ptHead; ptNext != NULL; ptNext = ptHead) + { + if (ptNext->ai_canonname) + WspiapiFree(ptNext->ai_canonname); + + if (ptNext->ai_addr) + WspiapiFree(ptNext->ai_addr); + + ptHead = ptNext->ai_next; + WspiapiFree(ptNext); + } +} + + + +__inline +int +WINAPI +WspiapiLegacyGetAddrInfo( + IN const char *pszNodeName, + IN const char *pszServiceName, + IN const struct addrinfo *ptHints, + OUT struct addrinfo **pptResult) +/*++ + +Routine Description + Protocol-independent name-to-address translation. + As specified in RFC 2553, Section 6.4. + This is the hacked version that only supports IPv4. + +Arguments + pszNodeName node name to lookup. + pszServiceName service name to lookup. + ptHints hints about how to process request. + pptResult where to return result. + +Return Value + returns zero if successful, an EAI_* error code if not. + +--*/ +{ + int iError = 0; + int iFlags = 0; + int iFamily = PF_UNSPEC; + int iSocketType = 0; + int iProtocol = 0; + WORD wPort = 0; + DWORD dwAddress = 0; + + struct servent *ptService = NULL; + char *pc = NULL; + BOOL bClone = FALSE; + WORD wTcpPort = 0; + WORD wUdpPort = 0; + + + // initialize pptResult with default return value. + *pptResult = NULL; + + + //////////////////////////////////////// + // validate arguments... + // + + // both the node name and the service name can't be NULL. + if ((!pszNodeName) && (!pszServiceName)) + return EAI_NONAME; + + // validate hints. + if (ptHints) + { + // all members other than ai_flags, ai_family, ai_socktype + // and ai_protocol must be zero or a null pointer. + if ((ptHints->ai_addrlen != 0) || + (ptHints->ai_canonname != NULL) || + (ptHints->ai_addr != NULL) || + (ptHints->ai_next != NULL)) + { + return EAI_FAIL; + } + + // the spec has the "bad flags" error code, so presumably we + // should check something here. insisting that there aren't + // any unspecified flags set would break forward compatibility, + // however. so we just check for non-sensical combinations. + // + // we cannot come up with a canonical name given a null node name. + iFlags = ptHints->ai_flags; + if ((iFlags & AI_CANONNAME) && !pszNodeName) + return EAI_BADFLAGS; + + // we only support a limited number of protocol families. + iFamily = ptHints->ai_family; + if ((iFamily != PF_UNSPEC) && (iFamily != PF_INET)) + return EAI_FAMILY; + + // we only support only these socket types. + iSocketType = ptHints->ai_socktype; + if ((iSocketType != 0) && + (iSocketType != SOCK_STREAM) && + (iSocketType != SOCK_DGRAM) && + (iSocketType != SOCK_RAW)) + return EAI_SOCKTYPE; + + // REVIEW: What if ai_socktype and ai_protocol are at odds? + iProtocol = ptHints->ai_protocol; + } + + + //////////////////////////////////////// + // do service lookup... + + if (pszServiceName) + { + wPort = (WORD) strtoul(pszServiceName, &pc, 10); + if (*pc == '\0') // numeric port string + { + wPort = wTcpPort = wUdpPort = htons(wPort); + if (iSocketType == 0) + { + bClone = TRUE; + iSocketType = SOCK_STREAM; + } + } + else // non numeric port string + { + if ((iSocketType == 0) || (iSocketType == SOCK_DGRAM)) + { + ptService = getservbyname(pszServiceName, "udp"); + if (ptService) + wPort = wUdpPort = ptService->s_port; + } + + if ((iSocketType == 0) || (iSocketType == SOCK_STREAM)) + { + ptService = getservbyname(pszServiceName, "tcp"); + if (ptService) + wPort = wTcpPort = ptService->s_port; + } + + // assumes 0 is an invalid service port... + if (wPort == 0) // no service exists + return (iSocketType ? EAI_SERVICE : EAI_NONAME); + + if (iSocketType == 0) + { + // if both tcp and udp, process tcp now & clone udp later. + iSocketType = (wTcpPort) ? SOCK_STREAM : SOCK_DGRAM; + bClone = (wTcpPort && wUdpPort); + } + } + } + + + + //////////////////////////////////////// + // do node name lookup... + + // if we weren't given a node name, + // return the wildcard or loopback address (depending on AI_PASSIVE). + // + // if we have a numeric host address string, + // return the binary address. + // + if ((!pszNodeName) || (WspiapiParseV4Address(pszNodeName, &dwAddress))) + { + if (!pszNodeName) + { + dwAddress = htonl((iFlags & AI_PASSIVE) + ? INADDR_ANY + : INADDR_LOOPBACK); + } + + // create an addrinfo structure... + *pptResult = + WspiapiNewAddrInfo(iSocketType, iProtocol, wPort, dwAddress); + if (!(*pptResult)) + iError = EAI_MEMORY; + + if (!iError && pszNodeName) + { + // implementation specific behavior: set AI_NUMERICHOST + // to indicate that we got a numeric host address string. + (*pptResult)->ai_flags |= AI_NUMERICHOST; + + // return the numeric address string as the canonical name + if (iFlags & AI_CANONNAME) + { + (*pptResult)->ai_canonname = + WspiapiStrdup(inet_ntoa(*((struct in_addr *) &dwAddress))); + if (!(*pptResult)->ai_canonname) + iError = EAI_MEMORY; + } + } + } + + + // if we do not have a numeric host address string and + // AI_NUMERICHOST flag is set, return an error! + else if (iFlags & AI_NUMERICHOST) + { + iError = EAI_NONAME; + } + + + // since we have a non-numeric node name, + // we have to do a regular node name lookup. + else + { + iError = WspiapiLookupNode(pszNodeName, + iSocketType, + iProtocol, + wPort, + (iFlags & AI_CANONNAME), + pptResult); + } + + if (!iError && bClone) + { + iError = WspiapiClone(wUdpPort, *pptResult); + } + + if (iError) + { + WspiapiLegacyFreeAddrInfo(*pptResult); + *pptResult = NULL; + } + + return (iError); +} + + + +__inline +int +WINAPI +WspiapiLegacyGetNameInfo( + IN const struct sockaddr *ptSocketAddress, + IN socklen_t tSocketLength, + OUT char *pszNodeName, + IN size_t tNodeLength, + OUT char *pszServiceName, + IN size_t tServiceLength, + IN int iFlags) +/*++ + +Routine Description + protocol-independent address-to-name translation. + as specified in RFC 2553, Section 6.5. + this is the hacked version that only supports IPv4. + +Arguments + ptSocketAddress socket address to translate. + tSocketLength length of above socket address. + pszNodeName where to return the node name. + tNodeLength size of above buffer. + pszServiceName where to return the service name. + tServiceLength size of above buffer. + iFlags flags of type NI_*. + +Return Value + returns zero if successful, an EAI_* error code if not. + +--*/ +{ + struct servent *ptService; + WORD wPort; + char szBuffer[] = "65535"; + char *pszService = szBuffer; + + struct hostent *ptHost; + struct in_addr tAddress; + char *pszNode = NULL; + char *pc = NULL; + + + // sanity check ptSocketAddress and tSocketLength. + if (!ptSocketAddress) + return EAI_FAIL; + + if ((ptSocketAddress->sa_family != AF_INET) || + (tSocketLength != sizeof(struct sockaddr_in))) + { + return EAI_FAMILY; + } + + if (!(pszNodeName && tNodeLength) && + !(pszServiceName && tServiceLength)) + { + return EAI_NONAME; + } + + // the draft has the "bad flags" error code, so presumably we + // should check something here. insisting that there aren't + // any unspecified flags set would break forward compatibility, + // however. so we just check for non-sensical combinations. + if ((iFlags & NI_NUMERICHOST) && (iFlags & NI_NAMEREQD)) + { + return EAI_BADFLAGS; + } + + // translate the port to a service name (if requested). + if (pszServiceName && tServiceLength) + { + wPort = ((struct sockaddr_in *) ptSocketAddress)->sin_port; + + if (iFlags & NI_NUMERICSERV) + { + // return numeric form of the address. + sprintf(szBuffer, "%u", ntohs(wPort)); + } + else + { + // return service name corresponding to port. + ptService = getservbyport(wPort, + (iFlags & NI_DGRAM) ? "udp" : NULL); + if (ptService && ptService->s_name) + { + // lookup successful. + pszService = ptService->s_name; + } + else + { + // DRAFT: return numeric form of the port! + sprintf(szBuffer, "%u", ntohs(wPort)); + } + } + + + if (tServiceLength > strlen(pszService)) + strcpy(pszServiceName, pszService); + else + return EAI_FAIL; + } + + + // translate the address to a node name (if requested). + if (pszNodeName && tNodeLength) + { + // this is the IPv4-only version, so we have an IPv4 address. + tAddress = ((struct sockaddr_in *) ptSocketAddress)->sin_addr; + + if (iFlags & NI_NUMERICHOST) + { + // return numeric form of the address. + pszNode = inet_ntoa(tAddress); + } + else + { + // return node name corresponding to address. + ptHost = gethostbyaddr((char *) &tAddress, + sizeof(struct in_addr), + AF_INET); + if (ptHost && ptHost->h_name) + { + // DNS lookup successful. + // stop copying at a "." if NI_NOFQDN is specified. + pszNode = ptHost->h_name; + if ((iFlags & NI_NOFQDN) && (pc = strchr(pszNode, '.'))) + *pc = '\0'; + } + else + { + // DNS lookup failed. return numeric form of the address. + if (iFlags & NI_NAMEREQD) + { + switch (WSAGetLastError()) + { + case WSAHOST_NOT_FOUND: return EAI_NONAME; + case WSATRY_AGAIN: return EAI_AGAIN; + case WSANO_RECOVERY: return EAI_FAIL; + default: return EAI_NONAME; + } + } + else + pszNode = inet_ntoa(tAddress); + } + } + + if (tNodeLength > strlen(pszNode)) + strcpy(pszNodeName, pszNode); + else + return EAI_FAIL; + } + + return 0; +} + + + +typedef struct +{ + char const *pszName; + FARPROC pfAddress; +} WSPIAPI_FUNCTION; + +#define WSPIAPI_FUNCTION_ARRAY \ +{ \ + "getaddrinfo", (FARPROC) WspiapiLegacyGetAddrInfo, \ + "getnameinfo", (FARPROC) WspiapiLegacyGetNameInfo, \ + "freeaddrinfo", (FARPROC) WspiapiLegacyFreeAddrInfo, \ +} + + + +__inline +FARPROC +WINAPI +WspiapiLoad( + IN WORD wFunction) +/*++ + +Routine Description + try to locate the address family independent name resolution routines + (i.e. getaddrinfo, getnameinfo, freeaddrinfo, gai_strerror). + +Locks + this function call is not synchronized. hence the library containing + the routines might be loaded multiple times. another option is to + synchronize through a spin lock using a static local variable and the + InterlockedExchange operation. + + +Arguments + wFunction ordinal # of the function to get the pointer to + 0 getaddrinfo + 1 getnameinfo + 2 freeaddrinfo + +Return Value + address of the library/legacy routine + +--*/ +{ + HMODULE hLibrary = NULL; + + // these static variables store state across calls, across threads. + static BOOL bInitialized = FALSE; + static WSPIAPI_FUNCTION rgtGlobal[] = WSPIAPI_FUNCTION_ARRAY; + static const int iNumGlobal = (sizeof(rgtGlobal) / + sizeof(WSPIAPI_FUNCTION)); + + // we overwrite rgtGlobal only if all routines exist in library. + WSPIAPI_FUNCTION rgtLocal[] = WSPIAPI_FUNCTION_ARRAY; + FARPROC fScratch = NULL; + int i = 0; + + + if (bInitialized) // WspiapiLoad has already been called once + return (rgtGlobal[wFunction].pfAddress); + + do // breakout loop + { + // in Whistler and beyond... + // the routines are present in the WinSock 2 library (ws2_32.dll). + // printf("Looking in ws2_32 for getaddrinfo...\n"); + hLibrary = LoadLibraryA("ws2_32"); + if (hLibrary != NULL) + { + fScratch = GetProcAddress(hLibrary, "getaddrinfo"); + if (fScratch == NULL) + { + FreeLibrary(hLibrary); + hLibrary = NULL; + } + } + if (hLibrary != NULL) + break; + + + // in the IPv6 Technology Preview... + // the routines are present in the IPv6 WinSock library (wship6.dll). + // printf("Looking in wship6 for getaddrinfo...\n"); + hLibrary = LoadLibraryA("wship6"); + if (hLibrary != NULL) + { + fScratch = GetProcAddress(hLibrary, "getaddrinfo"); + if (fScratch == NULL) + { + FreeLibrary(hLibrary); + hLibrary = NULL; + } + } + } while (FALSE); + + + if (hLibrary != NULL) + { + // use routines from this library... + // since getaddrinfo is here, we expect all routines to be here, + // but will fall back to IPv4-only if any of them is missing. + for (i = 0; i < iNumGlobal; i++) + { + rgtLocal[i].pfAddress + = GetProcAddress(hLibrary, rgtLocal[i].pszName); + if (rgtLocal[i].pfAddress == NULL) + { + FreeLibrary(hLibrary); + hLibrary = NULL; + break; + } + } + + if (hLibrary != NULL) + { + // printf("found!\n"); + for (i = 0; i < iNumGlobal; i++) + rgtGlobal[i].pfAddress = rgtLocal[i].pfAddress; + } + } + + bInitialized = TRUE; + return (rgtGlobal[wFunction].pfAddress); +} + + + +__inline +int +WINAPI +WspiapiGetAddrInfo( + IN const char *nodename, + IN const char *servname, + IN const struct addrinfo *hints, + OUT struct addrinfo **res) +{ + static WSPIAPI_PGETADDRINFO pfGetAddrInfo = NULL; + + if (!pfGetAddrInfo) + pfGetAddrInfo = (WSPIAPI_PGETADDRINFO) WspiapiLoad(0); + return ((*pfGetAddrInfo) + (nodename, servname, hints, res)); +} + + + +__inline +int +WINAPI +WspiapiGetNameInfo ( + IN const struct sockaddr *sa, + IN socklen_t salen, + OUT char *host, + IN size_t hostlen, + OUT char *serv, + IN size_t servlen, + IN int flags) +{ + static WSPIAPI_PGETNAMEINFO pfGetNameInfo = NULL; + + if (!pfGetNameInfo) + pfGetNameInfo = (WSPIAPI_PGETNAMEINFO) WspiapiLoad(1); + return ((*pfGetNameInfo) + (sa, salen, host, hostlen, serv, servlen, flags)); +} + + + +__inline +void +WINAPI +WspiapiFreeAddrInfo ( + IN struct addrinfo *ai) +{ + static WSPIAPI_PFREEADDRINFO pfFreeAddrInfo = NULL; + + if (!pfFreeAddrInfo) + pfFreeAddrInfo = (WSPIAPI_PFREEADDRINFO) WspiapiLoad(2); + (*pfFreeAddrInfo)(ai); +} + +#ifdef __cplusplus +} +#endif + +#endif // _WSPIAPI_H_ |