addrconv.c File Reference

#include <ws2_32.h>
#include <debug.h>

Include dependency graph for addrconv.c:

Go to the source code of this file.

Macros
#define	NDEBUG
#define	DN2H(dw)
#define	DH2N(dw)
#define	WN2H(w)
#define	WH2N(w)

Functions
ULONG WSAAPI	inet_addr (IN CONST CHAR FAR *cp)
CHAR FAR *WSAAPI	inet_ntoa (IN IN_ADDR in)
ULONG WSAAPI	htonl (IN ULONG hostlong)
USHORT WSAAPI	htons (IN USHORT hostshort)
ULONG WSAAPI	ntohl (IN ULONG netlong)
USHORT WSAAPI	ntohs (IN USHORT netshort)
INT WSAAPI	WSAHtonl (IN SOCKET s, IN ULONG hostlong, OUT ULONG FAR *lpnetlong)
INT WSAAPI	WSAHtons (IN SOCKET s, IN USHORT hostshort, OUT USHORT FAR *lpnetshort)
INT WSAAPI	WSANtohl (IN SOCKET s, IN ULONG netlong, OUT ULONG FAR *lphostlong)
INT WSAAPI	WSANtohs (IN SOCKET s, IN USHORT netshort, OUT USHORT FAR *lphostshort)

Macro Definition Documentation

DH2N

#define DH2N

(

dw

)

Value:

    ((((dw) & 0xFF000000L) >> 24) | \
     (((dw) & 0x00FF0000L) >> 8) | \
     (((dw) & 0x0000FF00L) << 8) | \
     (((dw) & 0x000000FFL) << 24))

Definition at line 28 of file addrconv.c.

DN2H

#define DN2H

(

dw

)

Value:

  ((((dw) & 0xFF000000L) >> 24) | \
   (((dw) & 0x00FF0000L) >> 8) | \
     (((dw) & 0x0000FF00L) << 8) | \
     (((dw) & 0x000000FFL) << 24))

Definition at line 21 of file addrconv.c.

NDEBUG

#define NDEBUG

Definition at line 13 of file addrconv.c.

WH2N

#define WH2N

(

w

)

Value:

    ((((w) & 0xFF00) >> 8) | \
     (((w) & 0x00FF) << 8))

Definition at line 40 of file addrconv.c.

WN2H

#define WN2H

(

w

)

Value:

    ((((w) & 0xFF00) >> 8) | \
     (((w) & 0x00FF) << 8))

Definition at line 35 of file addrconv.c.

Function Documentation

htonl()

ULONG WSAAPI htonl

(

IN ULONG

hostlong

)

Definition at line 228 of file addrconv.c.

{
    return DH2N(hostlong);
}

htons()

USHORT WSAAPI htons

(

IN USHORT

hostshort

)

Definition at line 238 of file addrconv.c.

{
    return WH2N(hostshort);
}

inet_addr()

ULONG WSAAPI inet_addr

(

IN CONST CHAR FAR *

cp

)

Definition at line 71 of file addrconv.c.

{
    register u_long val, base, n;
    register unsigned char c;
    u_long parts[4], *pp = parts;
    if (!cp) return INADDR_ANY;
    if (!isdigit(*cp)) return INADDR_NONE;
 
again:
    /*
     * Collect number up to ``.''.
     * Values are specified as for C:
     * 0x=hex, 0=octal, other=decimal.
     */
    val = 0; base = 10;
    if (*cp == '0') {
        if (*++cp == 'x' || *cp == 'X')
            base = 16, cp++;
        else
            base = 8;
    }
    while ((c = *cp)) {
        if (isdigit(c)) {
            val = (val * base) + (c - '0');
            cp++;
            continue;
        }
        if (base == 16 && isxdigit(c)) {
            val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
            cp++;
            continue;
        }
        break;
    }
    if (*cp == '.') {
        /*
         * Internet format:
         *    a.b.c.d
         *    a.b.c    (with c treated as 16-bits)
         *    a.b    (with b treated as 24 bits)
         */
        if (pp >= parts + 4) return (INADDR_NONE);
        *pp++ = val;
        cp++;
        goto again;
    }
    /*
     * Check for trailing characters.
     */
    if (*cp && !isspace((UCHAR)*cp)) return (INADDR_NONE);
 
    *pp++ = val;
    /*
     * Concoct the address according to
     * the number of parts specified.
     */
    n = (u_long)(pp - parts);
    switch (n) {
 
    case 1:                /* a -- 32 bits */
        val = parts[0];
        break;
 
    case 2:                /* a.b -- 8.24 bits */
        val = (parts[0] << 24) | (parts[1] & 0xffffff);
        break;
 
    case 3:                /* a.b.c -- 8.8.16 bits */
        val = (parts[0] << 24) | ((parts[1] & 0xff) << 16) |
            (parts[2] & 0xffff);
        break;
 
    case 4:                /* a.b.c.d -- 8.8.8.8 bits */
        val = (parts[0] << 24) | ((parts[1] & 0xff) << 16) |
              ((parts[2] & 0xff) << 8) | (parts[3] & 0xff);
        break;
 
    default:
        return (INADDR_NONE);
    }
    val = htonl(val);
    return (val);
}

inet_ntoa()

CHAR FAR *WSAAPI inet_ntoa

(

IN IN_ADDR

in

)

Definition at line 160 of file addrconv.c.

{
    PWSPROCESS Process;
    PWSTHREAD Thread;
    INT ErrorCode;
    WSADATA WsaData;
    BOOL ManualLoad = FALSE;
    CHAR b[10];
    PCHAR p;
    DPRINT("inet_ntoa: %lx\n", in);
 
    /* Enter prolog */
    if ((ErrorCode = WsApiProlog(&Process, &Thread)) != ERROR_SUCCESS)
    {
        DPRINT("MANUAL LOAD\n");
 
        /* Only fail if the error wasn't related to a missing WSAStartup */
        if (ErrorCode != WSANOTINITIALISED)
        {
            /* Fail */
            SetLastError(ErrorCode);
            return NULL;
        }
 
        /* Apps aren't expected to call WSAStartup for this API, so we will */
        if ((ErrorCode = WSAStartup(MAKEWORD(2,2), &WsaData)) != ERROR_SUCCESS)
        {
            /* We failed */
            SetLastError(ErrorCode);
            return NULL;
        }
 
        /* Try the prolog again */
        ManualLoad = TRUE;
        if ((ErrorCode = WsApiProlog(&Process, &Thread)) != ERROR_SUCCESS)
        {
            /* Failed again... */
            WSACleanup();
            SetLastError(ErrorCode);
            return NULL;
        }
    }
 
    p = Thread->Buffer;
    _itoa(in.S_un.S_addr & 0xFF, b, 10);
    strcpy(p, b);
    _itoa((in.S_un.S_addr >> 8) & 0xFF, b, 10);
    strcat(p, ".");
    strcat(p, b);
    _itoa((in.S_un.S_addr >> 16) & 0xFF, b, 10);
    strcat(p, ".");
    strcat(p, b);
    _itoa((in.S_un.S_addr >> 24) & 0xFF, b, 10);
    strcat(p, ".");
    strcat(p, b);
 
    /* Cleanup the manual load */
    if (ManualLoad) WSACleanup();
 
    /* Return the buffer */
    return p;
}

ntohl()

ULONG WSAAPI ntohl

(

IN ULONG

netlong

)

Definition at line 248 of file addrconv.c.

{
    return DN2H(netlong);
}

ntohs()

USHORT WSAAPI ntohs

(

IN USHORT

netshort

)

Definition at line 258 of file addrconv.c.

{
    return WN2H(netshort);
}

WSAHtonl()

INT WSAAPI WSAHtonl	(	IN SOCKET	s,
		IN ULONG	hostlong,
		OUT ULONG FAR *	lpnetlong
	)

Definition at line 268 of file addrconv.c.

{
    INT ErrorCode;
    PWSSOCKET Socket;
    DPRINT("WSAHtonl: %p, %lx, %p\n", s, hostlong, lpnetlong);
 
    /* Check for WSAStartup */
    if ((ErrorCode = WsQuickProlog()) == ERROR_SUCCESS)
    {
        /* Make sure we got a parameter */
        if (!lpnetlong)
        {
            /* Fail */
            SetLastError(WSAEFAULT);
            return SOCKET_ERROR;
        }
 
        /* Get the Socket Context */
        if ((Socket = WsSockGetSocket(s)))
        {
            /* Check which byte order to use */
            if (Socket->CatalogEntry->ProtocolInfo.iNetworkByteOrder ==
                LITTLEENDIAN)
            {
                /* No conversion needed */
                *lpnetlong = hostlong;
            }
            else
            {
                /* Use a swap */
                *lpnetlong = DN2H(hostlong);
            }
 
            /* Dereference the socket */
            WsSockDereference(Socket);
 
            /* Return success */
            return ERROR_SUCCESS;
        }
        else
        {
            /* Set the error code */
            ErrorCode = WSAENOTSOCK;
        }
    }
 
    /* Return with error */
    SetLastError(ErrorCode);
    return SOCKET_ERROR;
}

WSAHtons()

INT WSAAPI WSAHtons	(	IN SOCKET	s,
		IN USHORT	hostshort,
		OUT USHORT FAR *	lpnetshort
	)

Definition at line 326 of file addrconv.c.

{
    INT ErrorCode;
    PWSSOCKET Socket;
    DPRINT("WSAHtons: %p, %lx, %p\n", s, hostshort, lpnetshort);
 
    /* Check for WSAStartup */
    if ((ErrorCode = WsQuickProlog()) == ERROR_SUCCESS)
    {
        /* Make sure we got a parameter */
        if (!lpnetshort)
        {
            /* Fail */
            SetLastError(WSAEFAULT);
            return SOCKET_ERROR;
        }
 
        /* Get the Socket Context */
        if ((Socket = WsSockGetSocket(s)))
        {
            /* Check which byte order to use */
            if (Socket->CatalogEntry->ProtocolInfo.iNetworkByteOrder ==
                LITTLEENDIAN)
            {
                /* No conversion needed */
                *lpnetshort = hostshort;
            }
            else
            {
                /* Use a swap */
                *lpnetshort = WN2H(hostshort);
            }
 
            /* Dereference the socket */
            WsSockDereference(Socket);
 
            /* Return success */
            return ERROR_SUCCESS;
        }
        else
        {
            /* Set the error code */
            ErrorCode = WSAENOTSOCK;
        }
    }
 
    /* Return with error */
    SetLastError(ErrorCode);
    return SOCKET_ERROR;
}

WSANtohl()

INT WSAAPI WSANtohl	(	IN SOCKET	s,
		IN ULONG	netlong,
		OUT ULONG FAR *	lphostlong
	)

Definition at line 384 of file addrconv.c.

{
    INT ErrorCode;
    PWSSOCKET Socket;
    DPRINT("WSANtohl: %p, %lx, %p\n", s, netlong, lphostlong);
 
    /* Check for WSAStartup */
    if ((ErrorCode = WsQuickProlog()) == ERROR_SUCCESS)
    {
        /* Make sure we got a parameter */
        if (!lphostlong)
        {
            /* Fail */
            SetLastError(WSAEFAULT);
            return SOCKET_ERROR;
        }
 
        /* Get the Socket Context */
        if ((Socket = WsSockGetSocket(s)))
        {
            /* Check which byte order to use */
            if (Socket->CatalogEntry->ProtocolInfo.iNetworkByteOrder ==
                LITTLEENDIAN)
            {
                /* No conversion needed */
                *lphostlong = netlong;
            }
            else
            {
                /* Use a swap */
                *lphostlong = DN2H(netlong);
            }
 
            /* Dereference the socket */
            WsSockDereference(Socket);
 
            /* Return success */
            return ERROR_SUCCESS;
        }
        else
        {
            /* Set the error code */
            ErrorCode = WSAENOTSOCK;
        }
    }
 
    /* Return with error */
    SetLastError(ErrorCode);
    return SOCKET_ERROR;
}

WSANtohs()

INT WSAAPI WSANtohs	(	IN SOCKET	s,
		IN USHORT	netshort,
		OUT USHORT FAR *	lphostshort
	)

Definition at line 442 of file addrconv.c.

{
    INT ErrorCode;
    PWSSOCKET Socket;
    DPRINT("WSANtohs: %p, %lx, %p\n", s, netshort, lphostshort);
 
    /* Check for WSAStartup */
    if ((ErrorCode = WsQuickProlog()) == ERROR_SUCCESS)
    {
        /* Make sure we got a parameter */
        if (!lphostshort)
        {
            /* Fail */
            SetLastError(WSAEFAULT);
            return SOCKET_ERROR;
        }
 
        /* Get the Socket Context */
        if ((Socket = WsSockGetSocket(s)))
        {
            /* Check which byte order to use */
            if (Socket->CatalogEntry->ProtocolInfo.iNetworkByteOrder ==
                LITTLEENDIAN)
            {
                /* No conversion needed */
                *lphostshort = netshort;
            }
            else
            {
                /* Use a swap */
                *lphostshort = WN2H(netshort);
            }
 
            /* Dereference the socket */
            WsSockDereference(Socket);
 
            /* Return success */
            return ERROR_SUCCESS;
        }
        else
        {
            /* Set the error code */
            ErrorCode = WSAENOTSOCK;
        }
    }
 
    /* Return with error */
    SetLastError(ErrorCode);
    return SOCKET_ERROR;
}