socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 5
fcntl(5, F_DUPFD, 20)                   = 20
close(5)                                = 0
fcntl(20, F_GETFL)                      = 0x2 (flags O_RDWR)
fcntl(20, F_SETFL, O_RDWR|O_NONBLOCK)   = 0
uname({sys="Linux", node="master41", ...}) = 0
setsockopt(20, SOL_SOCKET, SO_TIMESTAMP, [1], 4) = 0
setsockopt(20, SOL_IP, IP_MTU_DISCOVER, [0], 4) = 0
getsockopt(20, SOL_SOCKET, SO_RCVBUF, [212992], [4]) = 0
bind(20, {sa_family=AF_INET, sin_port=htons(9915), sin_addr=inet_addr("0.0.0.0")}, 16) = 0
socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP) = 5
fcntl(5, F_DUPFD, 20)                   = 21
close(5)                                = 0
fcntl(21, F_GETFL)                      = 0x2 (flags O_RDWR)
fcntl(21, F_SETFL, O_RDWR|O_NONBLOCK)   = 0
setsockopt(21, SOL_IPV6, IPV6_MTU, [1280], 4) = 0
setsockopt(21, SOL_SOCKET, SO_TIMESTAMP, [1], 4) = 0
setsockopt(21, SOL_IPV6, 0x31 /* IPV6_??? */, [1], 4) = 0
setsockopt(21, SOL_IPV6, IPV6_MTU_DISCOVER, [0], 4) = 0
getsockopt(21, SOL_SOCKET, SO_RCVBUF, [212992], [4]) = 0
setsockopt(21, SOL_IPV6, IPV6_V6ONLY, [1], 4) = 0
bind(21, {sa_family=AF_INET6, sin6_port=htons(31733), inet_pton(AF_INET6, "::", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = 0
...
open("/etc/resolv.conf", O_RDONLY)      = 5
fstat(5, {st_mode=S_IFREG|0644, st_size=506, ...}) = 0
...
read(5, "# Warning: This file is auto-gen"..., 4096) = 506
read(5, "", 4096)                       = 0
close(5)                                = 0
...
stat("/etc/dns.conf", 0x7ffca568b270)   = -1 ENOENT (No such file or directory)
...
recvmsg(20, 0x7ffca568a890, 0)          = -1 EAGAIN (Resource temporarily unavailable)
sendmsg(20, {msg_name(16)={sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.0.3")}, msg_iov(1)=[{"\31s\1\0\0\1\0\0\0\0\0\1\10master41\5phahn\2qa\0\0"..., 50}], msg_controllen=0, msg_flags=0}, 0) = 50
sendmsg(20, {msg_name(16)={sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.0.3")}, msg_iov(1)=[{"E\360\1\0\0\1\0\0\0\0\0\1\10master41\5phahn\2qa\0\0"..., 50}], msg_controllen=0, msg_flags=0}, 0) = 50
sendmsg(20, {msg_name(16)={sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.0.3")}, msg_iov(1)=[{"M\325\1\0\0\1\0\0\0\0\0\1\10master41\5phahn\2qa\5p"..., 59}], msg_controllen=0, msg_flags=0}, 0) = 59
sendmsg(20, {msg_name(16)={sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.0.3")}, msg_iov(1)=[{"Z\257\1\0\0\1\0\0\0\0\0\1\10master41\5phahn\2qa\5p"..., 59}], msg_controllen=0, msg_flags=0}, 0) = 59
select(22, [20], [], NULL, {0, 0})      = 0 (Timeout)
select(22, [20], [], NULL, {1, 196611}) = 1 (in [20], left {1, 196468})
recvmsg(20, {msg_name(16)={sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.0.3")}, msg_iov(1)=[{"\31s\201\203\0\1\0\0\0\1\0\1\10master41\5phahn\2qa\0\0"..., 4096}], msg_controllen=32, {cmsg_len=32, cmsg_level=SOL_SOCKET, cmsg_type=0x1d /* SCM_??? */, ...}, msg_flags=0}, 0) = 122
recvmsg(20, {msg_name(16)={sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.0.3")}, msg_iov(1)=[{"E\360\201\203\0\1\0\0\0\1\0\1\10master41\5phahn\2qa\0\0"..., 4096}], msg_controllen=32, {cmsg_len=32, cmsg_level=SOL_SOCKET, cmsg_type=0x1d /* SCM_??? */, ...}, msg_flags=0}, 0) = 122
recvmsg(20, {msg_name(16)={sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.0.3")}, msg_iov(1)=[{"M\325\201\203\0\1\0\0\0\1\0\1\10master41\5phahn\2qa\5p"..., 4096}], msg_controllen=32, {cmsg_len=32, cmsg_level=SOL_SOCKET, cmsg_type=0x1d /* SCM_??? */, ...}, msg_flags=0}, 0) = 131
recvmsg(20, {msg_name(16)={sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("192.168.0.3")}, msg_iov(1)=[{"Z\257\201\203\0\1\0\0\0\1\0\1\10master41\5phahn\2qa\5p"..., 4096}], msg_controllen=32, {cmsg_len=32, cmsg_level=SOL_SOCKET, cmsg_type=0x1d /* SCM_??? */, ...}, msg_flags=0}, 0) = 131
recvmsg(20, 0x7ffca568adf0, 0)          = -1 EAGAIN (Resource temporarily unavailable)