Hi Ben,
On Thursday, 31 January 2013 19:10:21 UTC, Ben Noordhuis wrote:
>
>
> Not sure, it seems to work for me:
>
> $ out/Release/node tmp/dns-econn.js
> { [Error: queryA ENOTFOUND] code: 'ENOTFOUND', errno: 'ENOTFOUND',
> syscall: 'queryA' }
>
> The error code is ENOTFOUND for backwards compatibility but
> essentially means NXDOMAIN (which is what dig returns for that
> domain).
>
> Maybe run strace on the script to see what it's doing.
>
Can you try again with that hostname (servfail.test.snert.net) as this was
only returning SERVFAIL for my IP at the time, we've since managed to break
it properly for everyone ;-)
strace shows that packets are responded to and being as this is UDP -
there's no connections being refused or any truncated data causing a TCP
lookup:
0.000218 connect(7, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, 16) = 0
0.000222 send(7,
"Nx\1\0\0\1\0\0\0\0\0\0\10servfail\4test\5snert\3net\0\0\1\0\1", 41,
MSG_NOSIGNAL) = 41
0.000416 futex(0xb770046c, FUTEX_WAKE_PRIVATE, 1) = 1
0.000264 epoll_ctl(3, EPOLL_CTL_ADD, 4, {EPOLLIN, {u32=4,
u64=4294967300}}) = 0
0.000147 epoll_ctl(3, EPOLL_CTL_ADD, 5, {EPOLLIN, {u32=5,
u64=4294967301}}) = 0
0.000141 epoll_ctl(3, EPOLL_CTL_ADD, 7, {EPOLLIN, {u32=7,
u64=4294967303}}) = 0
0.000168 epoll_wait(3, {{EPOLLIN, {u32=7, u64=4294967303}}}, 64, 0) = 1
0.000207 clock_gettime(CLOCK_MONOTONIC, {18616500, 71519938}) = 0
0.000183 recvfrom(7,
"Nx\201\202\0\1\0\0\0\0\0\0\10servfail\4test\5snert\3net\0\0\1\0\1", 513,
0, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, [16]) = 41
0.000466 send(7,
"Nx\1\0\0\1\0\0\0\0\0\0\10servfail\4test\5snert\3net\0\0\1\0\1", 41,
MSG_NOSIGNAL) = 41
0.000445 recvfrom(7,
"Nx\201\202\0\1\0\0\0\0\0\0\10servfail\4test\5snert\3net\0\0\1\0\1", 513,
0, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, [16]) = 41
0.000506 send(7,
"Nx\1\0\0\1\0\0\0\0\0\0\10servfail\4test\5snert\3net\0\0\1\0\1", 41,
MSG_NOSIGNAL) = 41
0.000860 recvfrom(7, 0xbf837b9f, 513, 0, 0xbf837da0, 0xbf837dbc) = -1
EAGAIN (Resource temporarily unavailable)
0.000129 clock_gettime(CLOCK_MONOTONIC, {18616500, 74108425}) = 0
0.000133 epoll_wait(3, {{EPOLLIN, {u32=7, u64=4294967303}}}, 64, 953)
= 1
0.107171 clock_gettime(CLOCK_MONOTONIC, {18616500, 181412884}) = 0
0.000165 recvfrom(7,
"Nx\201\202\0\1\0\0\0\0\0\0\10servfail\4test\5snert\3net\0\0\1\0\1", 513,
0, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, [16]) = 41
0.000449 send(7,
"Nx\1\0\0\1\0\0\0\0\0\0\10servfail\4test\5snert\3net\0\0\1\0\1", 41,
MSG_NOSIGNAL) = 41
0.000431 recvfrom(7,
"Nx\201\202\0\1\0\0\0\0\0\0\10servfail\4test\5snert\3net\0\0\1\0\1", 513,
0, {sa_family=AF_INET, sin_port=htons(53),
sin_addr=inet_addr("127.0.0.1")}, [16]) = 41
0.000532 futex(0xb770046c, FUTEX_WAKE_PRIVATE, 1) = 1
0.001138 ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig
icanon echo ...}) = 0
0.001087 futex(0xb770046c, FUTEX_WAKE_PRIVATE, 1) = 1
0.000390 ioctl(1, TIOCGWINSZ, {ws_row=32, ws_col=132, ws_xpixel=0,
ws_ypixel=0}) = 0
0.000336 rt_sigaction(SIGWINCH, {0x82003a0, ~[RTMIN RT_1],
SA_RESTART}, NULL, 8) = 0
0.000515 futex(0xb770046c, FUTEX_WAKE_PRIVATE, 1) = 1
0.001139 futex(0xb770046c, FUTEX_WAKE_PRIVATE, 1) = 1
0.000914 write(1, "{ [Error: queryA ECONNREFUSED]\n code:
'ECONNREFUSED',\n errno: 'ECONNREFUSED',\n syscall: 'queryA' }\n", 102{
[Error: queryA ECONNREFUSED]
code: 'ECONNREFUSED',
errno: 'ECONNREFUSED',
syscall: 'queryA' }
) = 102
Regards,
Steve.
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