aToIPAddr.c File Reference

#include <stdio.h>
#include <string.h>
#include "epicsTypes.h"
#include "osiSock.h"

Include dependency graph for aToIPAddr.c:

Go to the source code of this file.

Macros
#define	NELEMENTS(A)   (sizeof(A)/sizeof(A[0]))

Functions
LIBCOM_API int epicsStdCall	aToIPAddr (const char *pAddrString, unsigned short defaultPort, struct sockaddr_in *pIP)

Macro Definition Documentation

#define NELEMENTS

(

A

)

(sizeof(A)/sizeof(A[0]))

Definition at line 21 of file aToIPAddr.c.

Function Documentation

LIBCOM_API int epicsStdCall aToIPAddr	(	const char *	pAddrString,
		unsigned short	defaultPort,
		struct sockaddr_in *	pIP
	)

Definition at line 78 of file aToIPAddr.c.

{
    int status;
    unsigned addr[4];
    unsigned long rawAddr;
    /*
     * !! change n elements here requires change in format below !!
     */
    char hostName[512];
    char dummy[8];
    unsigned port;
    struct in_addr ina;

    /*
     * dotted ip addresses
     */
    status = sscanf ( pAddrString, " %u . %u . %u . %u %7s ",
            addr, addr+1u, addr+2u, addr+3u, dummy );
    if ( status == 4 ) {
        if ( addrArrayToUL ( addr, NELEMENTS ( addr ), & ina ) < 0 ) {
            return -1;
        }
        port = defaultPort;
        return initIPAddr ( ina, port, pIP );
    }

    /*
     * dotted ip addresses and port
     */
    status = sscanf ( pAddrString, " %u . %u . %u . %u : %u %7s",
            addr, addr+1u, addr+2u, addr+3u, &port, dummy );
    if ( status >= 5 ) {
        if ( status > 5 ) {
            /*
             * valid at the start but detritus on the end
             */
            return -1;
        }
        if ( addrArrayToUL ( addr, NELEMENTS ( addr ), &ina ) < 0 ) {
            return -1;
        }
        return initIPAddr ( ina, port, pIP );
    }

    /*
     * IP address as a raw number
     */
    status = sscanf ( pAddrString, " %lu %7s ", &rawAddr, dummy );
    if ( status == 1 ) {
        if ( rawAddr > 0xffffffff ) {
            return -1;
        }
        port = defaultPort;
        {
            epicsUInt32 rawAddr_32 = ( epicsUInt32 ) rawAddr;
            ina.s_addr = htonl ( rawAddr_32 );
            return initIPAddr ( ina, port, pIP );
        }
    }

    /*
     * IP address as a raw number, and port
     */
    status = sscanf ( pAddrString, " %lu : %u %7s ", &rawAddr, &port, dummy );
    if ( status >= 2 ) {
        if ( status > 2 ) {
            /*
             * valid at the start but detritus on the end
             */
            return -1;
        }
        if ( rawAddr > 0xffffffff ) {
            return -1;
        }
        {
            epicsUInt32 rawAddr_32 = ( epicsUInt32 ) rawAddr;
            ina.s_addr = htonl ( rawAddr_32 );
            return initIPAddr ( ina, port, pIP );
        }
    }


    /*
     * host name string
     */
    status = sscanf ( pAddrString, " %511[^:] %s ", hostName, dummy );
    if ( status == 1 ) {
        port = defaultPort;
        status = hostToIPAddr ( hostName, &ina );
        if ( status == 0 ) {
            return initIPAddr ( ina, port, pIP );
        }
    }

    /*
     * host name string, and port
     */
    status = sscanf ( pAddrString, " %511[^:] : %u %s ", hostName,
                        &port, dummy );
    if ( status >= 2 ) {
        if ( status > 2 ) {
            /*
             * valid at the start but detritus on the end
             */
            return -1;
        }
        status = hostToIPAddr ( hostName, &ina );
        if ( status == 0 ) {
            return initIPAddr ( ina, port, pIP );
        }
    }

    return -1;
}