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#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#include "buffer.h"
#include "dnsresolv.h"
#include "exit.h"
#include "fmt.h"
#include "ip.h"
#include "logmsg.h"
#include "str.h"
#include "stralloc.h"
#include "dns.h"
#define WHO "dnsmxip"
static stralloc sa = {0};
static stralloc ia = {0};
static stralloc out = {0};
static stralloc ipaddr = {0};
static int dns_ia(stralloc *ip, char *s)
{
int i;
int j = 0;
int r = 0;
char ip4str[IP4_FMT];
char ip6str[IP6_FMT];
if (!stralloc_copys(&sa, s)) return -1;
if (sa.s[sa.len - 1] != '.')
if (!stralloc_append(&sa, ".")) return -1;
if (!stralloc_copys(ip, "")) return -1;
DNS_INIT
if (dns_ip6(&ia, &sa) > 0) {
for (i = 0; i + 16 <= ia.len; i += 16) {
if (ip6_isv4mapped(ia.s + i)) continue;
j = ip6_fmt(ip6str, ia.s + i);
r += j;
if (!stralloc_catb(ip, ip6str, j)) return -1;
if (!stralloc_cats(ip, " ")) return -1;
r++;
}
}
if (dns_ip4(&ia, &sa) > 0) {
for (i = 0; i + 4 <= ia.len; i += 4) {
j = ip4_fmt(ip4str, ia.s + i);
r += j;
if (!stralloc_catb(ip, ip4str, j)) return -1;
if (!stralloc_cats(ip, " ")) return -1;
r++;
}
}
if (!stralloc_0(ip)) return -1;
return r ? r - 1 : 0;
}
int main(int argc, char **argv)
{
int j, k, r;
uint16 u;
int len;
char num[FMT_ULONG];
if (!argv[1]) logmsg(WHO, 100, USAGE, "dnsmx fqdn");
if (!stralloc_copys(&sa, argv[1])) logmsg(WHO, 111, FATAL, "out of memory");
DNS_INIT
if ((r = dns_mx(&out, &sa)) < 0) _exit(1);
if (r > 0) {
j = len = 0;
do {
j = str_chr(out.s + len + 2, '\0');
k = dns_ia(&ipaddr, out.s + len + 2); /* IP */
if (k) {
buffer_put(buffer_1, out.s + len + 2, j); /* MX */
buffer_puts(buffer_1, ": ");
out.s[len + 3] = '\0';
uint16_unpack_big(out.s + len, &u);
buffer_put(buffer_1, num, fmt_ulong(num, u));
buffer_puts(buffer_1, " [");
buffer_put(buffer_1, ipaddr.s, k);
buffer_puts(buffer_1, "]");
}
buffer_putsflush(buffer_1, "\n");
len += j + 3;
} while (len < out.len);
} else { /* A/AAAA */
k = dns_ia(&ipaddr, argv[1]); /* IP */
if (k) {
buffer_puts(buffer_1, argv[1]);
buffer_puts(buffer_1, ": -");
buffer_puts(buffer_1, " [");
buffer_put(buffer_1, ipaddr.s, k);
buffer_puts(buffer_1, "]");
buffer_putsflush(buffer_1, "\n");
}
}
_exit(0);
}
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