Experimental Physics and
Industrial Control System

I have a LAN/GPIB adapter that (stupidly) uses its MAC address as its hostname when getting an address from a DHCP server.   I find that I can't use such an address with the ASYN vxi11Configure command:

vxi11Configure("L0", "0-50-c2-83-43-92.dhcp.lbl.gov", 0, "0.0", "gpib0", 0, 0)

L0 Unknown host: "0-50-c2-83-43-92.dhcp.lbl.gov"

The problem is that the aToIPAddr routine sees a number as the first part of an address and gives up.   I think that the fix is to remove the first test after the first sscanf:

epicsShareFunc int epicsShareAPI

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

{

    int status;

    unsigned short addr[4];

    unsigned long rawAddr;

    char hostName[512]; /* !! change n elements here requires change in format below !! */

    unsigned short port;

    struct in_addr ina;

    /*

     * dotted ip addresses

     */

    status = sscanf (pAddrString, " %hu.%hu.%hu.%hu:%hu",

            addr, addr+1u, addr+2u, addr+3u, &port);

    if (status>0) {     <<<<<< I THINK THAT THIS TEST SHOULD JUST BE REMOVED

        if (status>=4) {

            if ( addrArrayToUL ( addr, NELEMENTS ( addr ), &ina ) < 0 ) {

                return -1;

            }

            if (status==4) {

                port = defaultPort;

            }

            return initIPAddr (ina, port, pIP);

        }

        else { <<<<<<AND THESE LINES, TOO

            return -1; <<<<<<AND THESE LINES, TOO

        } <<<<<<AND THESE LINES, TOO

    }

-- 
Eric Norum
[email protected]