inc/internet.h File Reference

#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>

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Functions
bits32	internetHostIp (char *hostName)
boolean	internetFillInAddress (char *hostName, int port, struct sockaddr_in *address)
boolean	internetIpToDottedQuad (bits32 ip, char dottedQuad[17])
boolean	internetDottedQuadToIp (char *dottedQuad, bits32 *retIp)
boolean	internetIsDottedQuad (char *s)
void	internetParseDottedQuad (char *dottedQuad, unsigned char quad[4])
void	internetUnpackIp (bits32 packed, unsigned char unpacked[4])
boolean	internetIpInSubnet (unsigned char unpackedIp[4], unsigned char subnet[4])

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Function Documentation

boolean internetDottedQuadToIp	(	char *	dottedQuad,
		bits32 *	retIp
	)

Definition at line 89 of file internet.c.

References errno, FALSE, TRUE, and warn().

Referenced by internetHostIp().

{
#ifndef __CYGWIN32__
struct in_addr ia;
if (inet_pton(AF_INET, dottedQuad, &ia) < 0)
    {
    warn("internetDottedQuadToIp problem on %s: %s", dottedQuad, strerror(errno));
    return FALSE;
    }
*retIp = ntohl(ia.s_addr);
return TRUE;
#else
warn("Sorry, internetDottedQuadToIp not supported in Windows.");
return FALSE;
#endif
}

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boolean internetFillInAddress	(	char *	hostName,
		int	port,
		struct sockaddr_in *	address
	)

Definition at line 50 of file internet.c.

References FALSE, internetHostIp(), TRUE, and ZeroVar.

Referenced by netAcceptingSocketFrom(), and netConnect().

{
ZeroVar(address);
address->sin_family = AF_INET;
address->sin_port = htons(port);
if (hostName == NULL)
    address->sin_addr.s_addr = INADDR_ANY;
else
    {
    if ((address->sin_addr.s_addr = htonl(internetHostIp(hostName))) == 0)
        return FALSE;
    }
return TRUE;
}

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bits32 internetHostIp

(

char *

hostName

)

Definition at line 26 of file internet.c.

References bits32, internetDottedQuadToIp(), internetIsDottedQuad(), and warn().

Referenced by internetFillInAddress().

{
struct hostent *hostent;
bits32 ret;
if (internetIsDottedQuad(hostName))
   {
   internetDottedQuadToIp(hostName, &ret);
   }
else
    {
    hostent = gethostbyname(hostName);
    if (hostent == NULL)
        {
        warn("Couldn't find host %s. h_errno %d", hostName, h_errno);
        return 0;
        }
    memcpy(&ret, hostent->h_addr_list[0], sizeof(ret));
    ret = ntohl(ret);
    }
return ret;
}

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boolean internetIpInSubnet	(	unsigned char	unpackedIp[4],
		unsigned char	subnet[4]
	)

Definition at line 135 of file internet.c.

References FALSE, and TRUE.

Referenced by netAcceptFrom().

{
int i;
for (i=0; i<4; ++i)
    {
    unsigned char c = subnet[i];
    if (c == 255)
        return TRUE;
    if (c != unpackedIp[i])
        return FALSE;
    }
return TRUE;
}

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boolean internetIpToDottedQuad	(	bits32	ip,
		char	dottedQuad[17]
	)

Definition at line 66 of file internet.c.

References errno, FALSE, TRUE, warn(), zeroBytes(), and ZeroVar.

{
#ifndef __CYGWIN32__
struct in_addr ia;
zeroBytes(dottedQuad, 17);
ZeroVar(&ia);
ia.s_addr = htonl(ip);
if (inet_ntop(AF_INET, &ia, dottedQuad, 16) == NULL)
    {
    warn("conversion problem on 0x%x in internetIpToDottedQuad: %s", 
        ip, strerror(errno));
    return FALSE;
    }
return TRUE;
#else
warn("Sorry, internetIpToDottedQuad not supported in Windows.");
return FALSE;
#endif
}

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boolean internetIsDottedQuad

(

char *

s

)

Definition at line 8 of file internet.c.

References FALSE, and TRUE.

Referenced by internetHostIp(), and internetParseDottedQuad().

{
int i;
if (!isdigit(s[0]))
    return FALSE;
for (i=0; i<3; ++i)
    {
    s = strchr(s, '.');
    if (s == NULL)
        return FALSE;
    s += 1;
    if (!isdigit(s[0]))
        return FALSE;
    }
return TRUE;
}

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void internetParseDottedQuad	(	char *	dottedQuad,
		unsigned char	quad[4]
	)

Definition at line 109 of file internet.c.

References errAbort(), and internetIsDottedQuad().

{
char *s = dottedQuad;
int i;
if (!internetIsDottedQuad(s))
    errAbort("%s is not a dotted quad", s);
for (i=0; i<4; ++i)
    {
    quad[i] = atoi(s);
    s = strchr(s, '.') + 1;
    }
}

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void internetUnpackIp	(	bits32	packed,
		unsigned char	unpacked[4]
	)

Definition at line 123 of file internet.c.

Referenced by netAcceptFrom().

{
int i;
for (i=3; i>=0; --i)
    {
    unpacked[i] = (packed&0xff);
    packed >>= 8;
    }
}

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