68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
#ident "$Id: resolv.c,v 1.1 2004/12/28 23:49:43 hpa Exp $"
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/* ----------------------------------------------------------------------- *
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*
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* Copyright 2004 H. Peter Anvin - All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, Inc., 53 Temple Place Ste 330,
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* Boston MA 02111-1307, USA; either version 2 of the License, or
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* (at your option) any later version; incorporated herein by reference.
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*
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* ----------------------------------------------------------------------- */
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/*
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* resolv.c
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*
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* Resolve an IP address
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*/
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#include <string.h>
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#include <stdio.h>
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#include <console.h>
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#include <stdlib.h>
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#include <com32.h>
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uint32_t resolv(const char *name)
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{
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com32sys_t reg;
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strcpy((char *)__com32.cs_bounce, name);
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memset(®, 0, sizeof reg);
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reg.eax.w[0] = 0x0010;
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reg.ebx.w[0] = OFFS(__com32.cs_bounce);
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reg.es = SEG(__com32.cs_bounce);
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__intcall(0x22, ®, ®);
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if ( reg.eflags.l & EFLAGS_CF )
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return 0;
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else
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return reg.eax.l;
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}
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int main(int argc, char *argv[])
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{
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uint32_t ip;
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openconsole(&dev_null_r, &dev_stdcon_w);
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if ( argc < 2 ) {
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fputs("Usage: resolv hostname\n", stderr);
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exit(1);
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}
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ip = resolv(argv[1]);
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if ( ip ) {
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printf("%s = %u.%u.%u.%u\n", argv[1],
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(ip & 0xff), (ip >> 8) & 0xff,
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(ip >> 16) & 0xff, (ip >> 24) & 0xff);
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} else {
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printf("%s not found\n", argv[1]);
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}
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return 0;
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}
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