1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/* ISC license. */
#include <string.h>
#include <stdint.h>
#include <errno.h>
#include <skalibs/types.h>
#include <skalibs/strerr.h>
#include <skalibs/sgetopt.h>
#include <skalibs/buffer.h>
#include <skalibs/genwrite.h>
#include <skalibs/tai.h>
#include <s6-dns/s6dns.h>
#include <s6-dns/s6dns-analyze.h>
#include <s6-dns/s6dns-debug.h>
#define USAGE "s6-dnsqr [ -1 | -2 ] [ -t timeout ] [ -D debuglevel ] qtype query"
#define dieusage() strerr_dieusage(100, USAGE)
int main (int argc, char const *const *argv)
{
tain deadline ;
unsigned int debuglevel = 0 ;
genwrite *where = &genwrite_stderr ;
PROG = "s6-dnsqr" ;
{
subgetopt l = SUBGETOPT_ZERO ;
unsigned int t = 0 ;
for (;;)
{
int opt = subgetopt_r(argc, argv, "12t:D:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case '1' : where = &genwrite_stdout ; break ;
case '2' : where = &genwrite_stderr ; break ;
case 't' : if (!uint0_scan(l.arg, &t)) dieusage() ; break ;
case 'D' : if (!uint0_scan(l.arg, &debuglevel)) dieusage() ; break ;
default : dieusage() ;
}
}
argc -= l.ind ; argv += l.ind ;
if (t) tain_from_millisecs(&deadline, t) ; else deadline = tain_infinite_relative ;
}
if (argc < 2) dieusage() ;
{
s6dns_debughook_t dbh = { .post_recv = 0, .pre_send = 0, .post_send = 0 } ;
s6dns_domain_t d ;
uint16_t qtype = s6dns_analyze_qtype_parse(argv[0]) ;
if (!qtype) dieusage() ;
if (!s6dns_domain_fromstring_noqualify_encode(&d, argv[1], strlen(argv[1])))
strerr_diefu2sys(100, "encode ", argv[1]) ;
dbh.external = where ;
if (debuglevel & 1) dbh.post_recv = &s6dns_debug_dumpdt_post_recv ;
if (debuglevel & 2) { dbh.pre_send = &s6dns_debug_dumpdt_pre_send ; dbh.post_send = &s6dns_debug_dumpdt_post_send ; }
tain_now_set_stopwatch_g() ;
tain_add_g(&deadline, &deadline) ;
if (!s6dns_init()) strerr_diefu1sys(111, "s6dns_init") ;
if (!s6dns_resolve_core_r_g(&d, qtype, &s6dns_engine_here, &s6dns_rci_here.servers, &dbh, &deadline))
{
char fmt[UINT16_FMT] ;
fmt[uint16_fmt(fmt, qtype)] = 0 ;
strerr_diefu6x((errno == ETIMEDOUT) ? 99 : 2, "resolve query ", argv[1], " of qtype ", fmt, ": ", s6dns_constants_error_str(errno)) ;
}
}
if (!s6dns_analyze_packet(&genwrite_stdout, s6dns_engine_packet(&s6dns_engine_here), s6dns_engine_packetlen(&s6dns_engine_here), 1))
{
int e = errno ;
buffer_flush(buffer_1) ;
errno = e ;
strerr_diefu1sys(111, "analyze response") ;
}
if (!buffer_flush(buffer_1)) strerr_diefu1sys(111, "write to stdout") ;
return 0 ;
}
|
