Hello all.
I tried to configure freeradius to operate as dhcp server.
I have one problem. Freeradius receives DHCP-Discover and DHCP-Request packets,
but replies are not sent. In logs all OK, but strace output contains
error EINVAL (Invalid argument) in packet sending via sendmsg.
Freeradius version is 2.1.x from git.
My config file:
dhcp:===========================
listen {
ipaddr = *
port = 67
type = dhcp
interface = eth0
broadcast = yes
}
dhcp DHCP-Discover {
linelog
update reply {
DHCP-Message-Type = DHCP-Offer
DHCP-Domain-Name-Server = 192.168.194.169
DHCP-Domain-Name-Server = 192.168.192.53
DHCP-Subnet-Mask = 255.255.255.128
DHCP-Router-Address = 192.168.194.126
DHCP-IP-Address-Lease-Time = 86400
DHCP-DHCP-Server-Identifier = 192.168.194.105
DHCP-Your-IP-Address = 192.168.194.106
}
linelog
ok
}
dhcp DHCP-Request {
update reply {
DHCP-Message-Type = DHCP-Ack
}
update reply {
DHCP-Domain-Name-Server = 192.168.194.169
DHCP-Domain-Name-Server = 192.168.192.53
DHCP-Subnet-Mask = 255.255.255.128
DHCP-Router-Address = 192.168.194.126
DHCP-IP-Address-Lease-Time = 86400
DHCP-DHCP-Server-Identifier = 192.168.194.105
DHCP-Your-IP-Address = 192.168.194.106
}
ok
}
dhcp:===========================
Log fragment:
freeradius -X ==================
Received DHCP-Discover of id f1b3e779 from 0.0.0.0:68 to 255.255.255.255:67
DHCP-Opcode = Client-Message
DHCP-Hardware-Type = Ethernet
DHCP-Hardware-Address-Length = 6
DHCP-Hop-Count = 0
DHCP-Transaction-Id = 4055099257
DHCP-Number-of-Seconds = 31
DHCP-Flags = 0
DHCP-Client-IP-Address = 0.0.0.0
DHCP-Your-IP-Address = 0.0.0.0
DHCP-Server-IP-Address = 0.0.0.0
DHCP-Gateway-IP-Address = 0.0.0.0
DHCP-Client-Hardware-Address = 00:22:15:30:16:7b
DHCP-Message-Type = DHCP-Discover
DHCP-Requested-IP-Address = 192.168.194.106
DHCP-Hostname = "capt-eee"
DHCP-Parameter-Request-List = DHCP-Subnet-Mask
DHCP-Parameter-Request-List = DHCP-Broadcast-Address
DHCP-Parameter-Request-List = DHCP-Time-Offset
DHCP-Parameter-Request-List = DHCP-Router-Address
DHCP-Parameter-Request-List = DHCP-Domain-Name
DHCP-Parameter-Request-List = DHCP-Domain-Name-Server
DHCP-Parameter-Request-List = DHCP-Domain-Search
DHCP-Parameter-Request-List = DHCP-Hostname
DHCP-Parameter-Request-List = DHCP-NETBIOS-Name-Servers
DHCP-Parameter-Request-List = DHCP-NETBIOS
DHCP-Parameter-Request-List = DHCP-Interface-MTU-Size
DHCP-Parameter-Request-List = DHCP-Classless-Static-Route
DHCP-Parameter-Request-List = DHCP-NTP-Servers
server dhcp {
Trying sub-section dhcp DHCP-Discover {...}
+- entering group DHCP-Discover {...}
[linelog] expand: %{reply:DHCP-Message-Type} ->
[linelog] ... expanding second conditional
[linelog] expand: %{request:DHCP-Message-Type} -> DHCP-Discover
[linelog] expand:
%{%{reply:DHCP-Message-Type}:-%{request:DHCP-Message-Type}} ->
DHCP-Discover
[linelog] expand: /var/log/radius/linelog -> /var/log/radius/linelog
[linelog] expand: %{DHCP-Transaction-Id} DISCOVER:
[%{DHCP-Client-Hardware-Address}] via (%{DHCP-Gateway-IP-Address})
%{DHCP-Hostname} -> 4055099257 DISCOVER: [00:22:15:30:16:7b] via
(0.0.0.0) capt-eee
++[linelog] returns ok
++[reply] returns ok
[linelog] expand: %{reply:DHCP-Message-Type} -> DHCP-Offer
[linelog] expand:
%{%{reply:DHCP-Message-Type}:-%{request:DHCP-Message-Type}} ->
DHCP-Offer
[linelog] expand: /var/log/radius/linelog -> /var/log/radius/linelog
[linelog] expand: %{DHCP-Transaction-Id} OFFER:
%{reply:DHCP-Your-IP-Address} to [%{DHCP-Client-Hardware-Address}] ...
-> 4055099257 OFFER: 192.168.194.106 to [00:22:15:30:16:7b] ...
++[linelog] returns ok
++[ok] returns ok
} # server dhcp
Sending DHCP-Offer of id f1b3e779 from 0.0.0.0:67 to 255.255.255.255:68
DHCP-Subnet-Mask = 255.255.255.128
DHCP-Router-Address = 192.168.194.126
DHCP-Domain-Name-Server = 192.168.194.169
DHCP-IP-Address-Lease-Time = 86400
DHCP-DHCP-Server-Identifier = 192.168.194.105
Finished request 5.
Cleaning up request 5 ID -239868039 with timestamp +85
Going to the next request
Ready to process requests.
freeradius -X ==================
STRACE output =================
write(1, "Ready to process requests.\n", 27) = 27
select(20, [11 13 14 15 16 17 18 19], NULL, NULL, NULL) = 1 (in [17])
getsockname(17, {sa_family=AF_INET, sin_port=htons(67),
sin_addr=inet_addr("0.0.0.0")}, [16]) = 0
recvmsg(17, {msg_name(16)={sa_family=AF_INET, sin_port=htons(68),
sin_addr=inet_addr("0.0.0.0")},
msg_iov(1)=[{"\1\1\6\0\361\263\347y\0\37\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\"\0250"...,
1460}], msg_controllen=32, {cmsg_len=28, cmsg_level=SOL_IP,
cmsg_type=, ...}, msg_flags=0}, 0) = 300
write(1, "Received DHCP-Discover of id f1b"..., 76) = 76
write(1, "\tDHCP-Opcode = Client-Message\n", 30) = 30
write(1, "\tDHCP-Hardware-Type = Ethernet\n", 31) = 31
write(1, "\tDHCP-Hardware-Address-Length = "..., 34) = 34
write(1, "\tDHCP-Hop-Count = 0\n", 20) = 20
write(1, "\tDHCP-Transaction-Id = 405509925"..., 34) = 34
write(1, "\tDHCP-Number-of-Seconds = 31\n", 29) = 29
write(1, "\tDHCP-Flags = 0\n", 16) = 16
write(1, "\tDHCP-Client-IP-Address = 0.0.0."..., 34) = 34
write(1, "\tDHCP-Your-IP-Address = 0.0.0.0\n", 32) = 32
write(1, "\tDHCP-Server-IP-Address = 0.0.0."..., 34) = 34
write(1, "\tDHCP-Gateway-IP-Address = 0.0.0"..., 35) = 35
write(1, "\tDHCP-Client-Hardware-Address = "..., 50) = 50
write(1, "\tDHCP-Message-Type = DHCP-Discov"..., 35) = 35
write(1, "\tDHCP-Requested-IP-Address = 80."..., 43) = 43
write(1, "\tDHCP-Hostname = \"capt-eee\"\n", 28) = 28
write(1, "\tDHCP-Parameter-Request-List = D"..., 48) = 48
write(1, "\tDHCP-Parameter-Request-List = D"..., 54) = 54
write(1, "\tDHCP-Parameter-Request-List = D"..., 48) = 48
write(1, "\tDHCP-Parameter-Request-List = D"..., 51) = 51
write(1, "\tDHCP-Parameter-Request-List = D"..., 48) = 48
write(1, "\tDHCP-Parameter-Request-List = D"..., 55) = 55
write(1, "\tDHCP-Parameter-Request-List = D"..., 50) = 50
write(1, "\tDHCP-Parameter-Request-List = D"..., 45) = 45
write(1, "\tDHCP-Parameter-Request-List = D"..., 57) = 57
write(1, "\tDHCP-Parameter-Request-List = D"..., 44) = 44
write(1, "\tDHCP-Parameter-Request-List = D"..., 55) = 55
write(1, "\tDHCP-Parameter-Request-List = D"..., 59) = 59
write(1, "\tDHCP-Parameter-Request-List = D"..., 48) = 48
write(1, "server dhcp {\n", 14) = 14
write(1, "Trying sub-section dhcp DHCP-Dis"..., 44) = 44
write(1, "+- entering group DHCP-Discover "..., 38) = 38
write(1, "[linelog] \texpand: %{reply:DHCP-"..., 50) = 50
write(1, "[linelog] \t... expanding second "..., 44) = 44
write(1, "[linelog] \texpand: %{request:DHC"..., 65) = 65
write(1, "[linelog] \texpand: %{%{reply:DHC"..., 96) = 96
write(1, "[linelog] \texpand: /var/log/radi"..., 70) = 70
open("/var/log/radius/linelog", O_WRONLY|O_CREAT|O_APPEND, 0600) = 20
write(1, "[linelog] \texpand: %{DHCP-Transa"..., 203) = 203
write(20, "4055099257 DISCOVER: [00:22:15:3"..., 64) = 64
close(20) = 0
write(1, "++[linelog] returns ok\n", 23) = 23
write(1, "++[reply] returns ok\n", 21) = 21
write(1, "[linelog] \texpand: %{reply:DHCP-"..., 60) = 60
write(1, "[linelog] \texpand: %{%{reply:DHC"..., 93) = 93
write(1, "[linelog] \texpand: /var/log/radi"..., 70) = 70
open("/var/log/radius/linelog", O_WRONLY|O_CREAT|O_APPEND, 0600) = 20
write(1, "[linelog] \texpand: %{DHCP-Transa"..., 182) = 182
write(20, "4055099257 OFFER: 80.91.194.106 "..., 59) = 59
close(20) = 0
write(1, "++[linelog] returns ok\n", 23) = 23
write(1, "++[ok] returns ok\n", 18) = 18
write(1, "} # server dhcp\n", 16) = 16
write(1, "Sending DHCP-Offer of id f1b3e77"..., 72) = 72
write(1, "\tDHCP-Subnet-Mask = 255.255.255."..., 36) = 36
write(1, "\tDHCP-Router-Address = 80.91.194"..., 37) = 37
write(1, "\tDHCP-Domain-Name-Server = 80.91"..., 41) = 41
write(1, "\tDHCP-IP-Address-Lease-Time = 86"..., 36) = 36
write(1, "\tDHCP-DHCP-Server-Identifier = 8"..., 45) = 45
sendmsg(17, {msg_name(16)={sa_family=AF_INET, sin_port=htons(68),
sin_addr=inet_addr("255.255.255.255")},
msg_iov(1)=[{"\2\1\6\0\361\263\347y\0\0\0\0\0\0\0\0P[\302jP[\302i\0\0\0\0\0\"\0250"...,
300}], msg_controllen=32, {cmsg_len=28, cmsg_level=SOL_IP, cmsg_type=,
...}, msg_flags=0}, 0) = -1 EINVAL (Invalid argument)
write(1, "Finished request 5.\n", 20) = 20
write(1, "Cleaning up request 5 ID -239868"..., 55) = 55
write(1, "Going to the next request\n", 26) = 26
wait4(-1, NULL, 0, NULL) = -1 ECHILD (No child processes)
write(1, "Ready to process requests.\n", 27) = 27
STRACE output =================
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