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/*
Read RR's in getdns wire format and print them in presentation
format on stdout.
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <errno.h>
#include <getdns/getdns.h>
#include <getdns/getdns_extra.h>
#undef DEBUG
#if defined(DEBUG)
static void
hd(const char *buf, size_t buf_len)
{
for (size_t n = 0; n < buf_len; n++)
{
if (n % 16 == 0)
{
if (n != 0)
fprintf(stderr, "\n");
fprintf(stderr, "%08x ", n);
}
else if (n % 8 == 0)
fprintf(stderr, " ");
fprintf(stderr, "%02hhx ", buf[n]);
}
fprintf(stderr, "\n");
}
#else /* !DEBUG */
#define hd(a,b)
#endif
/* Return value:
<0 -- error, the return value being -errorcode
0 -- done
>0 -- not done yet, call me again
*/
static int
read_rr(const uint8_t **buf, size_t *buf_len, getdns_dict **rr_dict)
{
getdns_return_t r = getdns_wire2rr_dict_scan(buf, buf_len, rr_dict);
if (r)
return -r;
return *buf_len;
}
#define INBUFLEN 4096
static size_t
read_inbuf(FILE *infp, uint8_t **bufp_out)
{
size_t nread = 0;
uint8_t *wirebuf = malloc(INBUFLEN);
int chunks = 1;
if (wirebuf == NULL)
goto out;
while (1)
{
size_t n = fread(wirebuf + nread, 1, INBUFLEN, infp);
nread += n;
if (n < INBUFLEN)
break; /* Done. */
wirebuf = realloc(wirebuf, ++chunks * INBUFLEN);
if (wirebuf == NULL)
break;
}
out:
if (bufp_out != NULL)
*bufp_out = wirebuf;
return nread;
}
int
main(int argc, char *argv[])
{
int rrv = 0;
uint8_t *inbuf = NULL;
const uint8_t *bufp = NULL;
size_t inbuf_len = 0;
getdns_dict *rr_dict = NULL;
getdns_return_t r = 0;
FILE *infp = stdin;
if (argc > 1)
{
infp = fopen(argv[1], "r");
if (infp == NULL)
{
perror("fopen(argv[1])");
return -errno;
}
}
inbuf_len = read_inbuf(infp, &inbuf);
if (inbuf == NULL)
{
perror("read_inbuf");
return -errno;
}
if (infp != stdin)
if (fclose(infp))
perror("fclose");
hd((const char *) wirebuf, n);
bufp = inbuf;
while (1)
{
char *stringbuf = NULL;
rrv = read_rr(&bufp, &inbuf_len, &rr_dict);
if (rrv < 0)
break;
r = getdns_rr_dict2str(rr_dict, &stringbuf);
if (r)
break;
getdns_dict_destroy(rr_dict);
printf("%s", stringbuf);
free(stringbuf);
if (rrv == 0)
break; /* Done. */
}
free(inbuf);
if (rrv < 0)
{
fprintf(stderr, "parsing input failed: %s\n",
getdns_get_errorstr_by_id(-rrv));
return rrv;
}
if (r)
{
fprintf(stderr, "converting dict to string failed: %s\n",
getdns_get_errorstr_by_id(r));
return -r;
}
return 0;
}
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