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RE: [lwip-users] DHCP and changing the MAC address
|
From: |
Tom C. Barker |
|
Subject: |
RE: [lwip-users] DHCP and changing the MAC address |
|
Date: |
Thu, 24 Jun 2004 16:19:10 -0700 |
Leon,
The second problem of sending out a discover and response only, has gone away...
Here is the debug dump and the ethereal dump of trying to change the MAC
address.
There are 3 sets of the four-part transaction. The first two are a duplicate
(bug)
the third is when I change from MAC xxxxxxxxxx05 to xxxxxxxxxx06. It seems I
get
a x.x.x.209 for both MACs (?) in this instance.
Even this may not help you so I'll be looking for another instance. Remember my
original issue was that when I change MACs, the listening pcb was based on the
original IP address which was zeroed in order to get another IP address. The
transfer to the new address in the listening pcb does not take place because
the original address was not retained in the netif, hence no basis for
transferring
control.
Tom
//-----------------------------------------------------------------------------
dhcp_release()
dhcp_arp_reply()
dhcp_release: RELEASED, DHCP_OFF
dhcp_release(): set request timeout 1000 msecs
dhcp_stop()
dhcp_free_reply(): free'd
dhcp_start(netif=0x110667a8) et0
dhcp_start(): starting new DHCP client
dhcp_start(): allocated dhcp
dhcp_start(): created new udp pcb
dhcp_start(): starting DHCP configuration
dhcp_discover()
dhcp_discover: making request
dhcp_discover: realloc()ing
dhcp_discover: send()ing
dhcp_discover: bind()ing
dhcp_discover: connect()ing
dhcp_discover: deleting()ing
dhcp_discover: SELECTING
dhcp_discover(): set request timeout 2000 msecs
dhcp_recv(pbuf = 0x1107db1c) from DHCP server 216.101.63.3 port 67
pbuf->len = 300
pbuf->tot_len = 300
dhcp_free_reply(): free'd
dhcp_unfold_reply(): copied 240 bytes into dhcp->msg_in[]
dhcp_unfold_reply(): copied 60 bytes to dhcp->options_in[]
searching DHCP_OPTION_MESSAGE_TYPE
option found at offset 0 in options
option byte value=2
DHCP_OFFER received in DHCP_SELECTING state
skipping option 53 in options
skipping option 1 in options
skipping option 58 in options
skipping option 59 in options
skipping option 51 in options
option found at offset 27 in options
dhcp_handle_offer(netif=0x110667a8) et0
option long value=3630513923
dhcp_handle_offer(): server 0xd8653f03
dhcp_handle_offer(): offer for 0xd8653fd1
dhcp_select(netif=0x110667a8) et0
dhcp_select: REQUESTING
dhcp_select(): set request timeout 1000 msecs
dhcp_recv(pbuf = 0x1107c8bc) from DHCP server 216.101.63.3 port 67
pbuf->len = 300
pbuf->tot_len = 300
dhcp_free_reply(): free'd
dhcp_unfold_reply(): copied 240 bytes into dhcp->msg_in[]
dhcp_unfold_reply(): copied 60 bytes to dhcp->options_in[]
searching DHCP_OPTION_MESSAGE_TYPE
option found at offset 0 in options
option byte value=5
DHCP_ACK received
skipping option 53 in options
skipping option 58 in options
skipping option 59 in options
option found at offset 15 in options
option long value=28800
skipping option 53 in options
option found at offset 3 in options
option long value=14400
skipping option 53 in options
skipping option 58 in options
option found at offset 9 in options
option long value=25200
skipping option 53 in options
skipping option 58 in options
skipping option 59 in options
skipping option 51 in options
skipping option 54 in options
option found at offset 27 in options
option long value=4294967040
skipping option 53 in options
skipping option 58 in options
skipping option 59 in options
skipping option 51 in options
skipping option 54 in options
skipping option 1 in options
option found at offset 33 in options
option long value=3630513921
skipping option 53 in options
skipping option 58 in options
skipping option 59 in options
skipping option 51 in options
skipping option 54 in options
skipping option 1 in options
skipping option 3 in options
dhcp_check(netif=0x110667a8) et
dhcp_check(): set request timeout 500 msecs
dhcp_fine_tmr(): request timeout
dhcp_timeout()
dhcp_timeout(): CHECKING, ARP request timed out
dhcp_check(netif=0x110667a8) et
dhcp_check(): set request timeout 500 msecs
dhcp_fine_tmr(): request timeout
dhcp_timeout()
dhcp_timeout(): CHECKING, ARP request timed out
dhcp_check(netif=0x110667a8) et
dhcp_check(): set request timeout 500 msecs
dhcp_fine_tmr(): request timeout
dhcp_timeout()
dhcp_timeout(): CHECKING, ARP request timed out
dhcp_bind(netif=0x110667a8) et0
dhcp_bind(): t1 renewal timer 14400 secs
dhcp_bind(): set request timeout 14400000 msecs
dhcp_bind(): t2 rebind timer 25200 secs
dhcp_bind(): set request timeout 25200000 msecs
dhcp_bind(): IP: 0xd8653fd1
dhcp_bind(): SN: 0xffffff00
dhcp_bind(): GW: 0xd8653f01
dhcp_release()
dhcp_release: RELEASED, DHCP_OFF
dhcp_release(): set request timeout 1000 msecs
dhcp_stop()
dhcp_free_reply(): free'd
dhcp_start(netif=0x110667a8) et0
dhcp_start(): starting new DHCP client
dhcp_start(): allocated dhcp
dhcp_start(): created new udp pcb
dhcp_start(): starting DHCP configuration
dhcp_discover()
dhcp_discover: making request
dhcp_discover: realloc()ing
dhcp_discover: send()ing
dhcp_discover: bind()ing
dhcp_discover: connect()ing
dhcp_discover: deleting()ing
dhcp_discover: SELECTING
dhcp_discover(): set request timeout 2000 msecs
dhcp_recv(pbuf = 0x1107855c) from DHCP server 216.101.63.3 port 67
pbuf->len = 300
pbuf->tot_len = 300
dhcp_free_reply(): free'd
dhcp_unfold_reply(): copied 240 bytes into dhcp->msg_in[]
dhcp_unfold_reply(): copied 60 bytes to dhcp->options_in[]
searching DHCP_OPTION_MESSAGE_TYPE
option found at offset 0 in options
option byte value=2
DHCP_OFFER received in DHCP_SELECTING state
skipping option 53 in options
skipping option 1 in options
skipping option 58 in options
skipping option 59 in options
skipping option 51 in options
option found at offset 27 in options
dhcp_handle_offer(netif=0x110667a8) et0
option long value=3630513923
dhcp_handle_offer(): server 0xd8653f03
dhcp_handle_offer(): offer for 0xd8653fd1
dhcp_select(netif=0x110667a8) et0
dhcp_select: REQUESTING
dhcp_select(): set request timeout 1000 msecs
dhcp_recv(pbuf = 0x1107a3fc) from DHCP server 216.101.63.3 port 67
pbuf->len = 300
pbuf->tot_len = 300
dhcp_free_reply(): free'd
dhcp_unfold_reply(): copied 240 bytes into dhcp->msg_in[]
dhcp_unfold_reply(): copied 60 bytes to dhcp->options_in[]
searching DHCP_OPTION_MESSAGE_TYPE
option found at offset 0 in options
option byte value=5
DHCP_ACK received
skipping option 53 in options
skipping option 58 in options
skipping option 59 in options
option found at offset 15 in options
option long value=28800
skipping option 53 in options
option found at offset 3 in options
option long value=14400
skipping option 53 in options
skipping option 58 in options
option found at offset 9 in options
option long value=25200
skipping option 53 in options
skipping option 58 in options
skipping option 59 in options
skipping option 51 in options
skipping option 54 in options
option found at offset 27 in options
option long value=4294967040
skipping option 53 in options
skipping option 58 in options
skipping option 59 in options
skipping option 51 in options
skipping option 54 in options
skipping option 1 in options
option found at offset 33 in options
option long value=3630513921
skipping option 53 in options
skipping option 58 in options
skipping option 59 in options
skipping option 51 in options
skipping option 54 in options
skipping option 1 in options
skipping option 3 in options
dhcp_check(netif=0x110667a8) et
dhcp_check(): set request timeout 500 msecs
dhcp_fine_tmr(): request timeout
dhcp_timeout()
dhcp_timeout(): CHECKING, ARP request timed out
dhcp_check(netif=0x110667a8) et
dhcp_check(): set request timeout 500 msecs
dhcp_fine_tmr(): request timeout
dhcp_timeout()
dhcp_timeout(): CHECKING, ARP request timed out
dhcp_check(netif=0x110667a8) et
dhcp_check(): set request timeout 500 msecs
dhcp_fine_tmr(): request timeout
dhcp_timeout()
dhcp_timeout(): CHECKING, ARP request timed out
dhcp_bind(netif=0x110667a8) et0
dhcp_bind(): t1 renewal timer 14400 secs
dhcp_bind(): set request timeout 14400000 msecs
dhcp_bind(): t2 rebind timer 25200 secs
dhcp_bind(): set request timeout 25200000 msecs
dhcp_bind(): IP: 0xd8653fd1
dhcp_bind(): SN: 0xffffff00
dhcp_bind(): GW: 0xd8653f01
dhcp_release()
dhcp_release: RELEASED, DHCP_OFF
dhcp_release(): set request timeout 1000 msecs
dhcp_stop()
dhcp_free_reply(): free'd
dhcp_start(netif=0x110667a8) et0
dhcp_start(): starting new DHCP client
dhcp_start(): allocated dhcp
dhcp_start(): created new udp pcb
dhcp_start(): starting DHCP configuration
dhcp_discover()
dhcp_discover: making request
dhcp_discover: realloc()ing
dhcp_discover: send()ing
dhcp_discover: bind()ing
dhcp_discover: connect()ing
dhcp_discover: deleting()ing
dhcp_discover: SELECTING
dhcp_discover(): set request timeout 2000 msecs
dhcp_recv(pbuf = 0x11079ddc) from DHCP server 216.101.63.3 port 67
pbuf->len = 300
pbuf->tot_len = 300
dhcp_free_reply(): free'd
dhcp_unfold_reply(): copied 240 bytes into dhcp->msg_in[]
dhcp_unfold_reply(): copied 60 bytes to dhcp->options_in[]
searching DHCP_OPTION_MESSAGE_TYPE
option found at offset 0 in options
option byte value=2
DHCP_OFFER received in DHCP_SELECTING state
skipping option 53 in options
skipping option 1 in options
skipping option 58 in options
skipping option 59 in options
skipping option 51 in options
option found at offset 27 in options
dhcp_handle_offer(netif=0x110667a8) et0
option long value=3630513923
dhcp_handle_offer(): server 0xd8653f03
dhcp_handle_offer(): offer for 0xd8653fd1
dhcp_select(netif=0x110667a8) et0
dhcp_select: REQUESTING
dhcp_select(): set request timeout 1000 msecs
dhcp_recv(pbuf = 0x1107d4fc) from DHCP server 216.101.63.3 port 67
pbuf->len = 300
pbuf->tot_len = 300
dhcp_free_reply(): free'd
dhcp_unfold_reply(): copied 240 bytes into dhcp->msg_in[]
dhcp_unfold_reply(): copied 60 bytes to dhcp->options_in[]
searching DHCP_OPTION_MESSAGE_TYPE
option found at offset 0 in options
option byte value=5
DHCP_ACK received
skipping option 53 in options
skipping option 58 in options
skipping option 59 in options
option found at offset 15 in options
option long value=28800
skipping option 53 in options
option found at offset 3 in options
option long value=14400
skipping option 53 in options
skipping option 58 in options
option found at offset 9 in options
option long value=25200
skipping option 53 in options
skipping option 58 in options
skipping option 59 in options
skipping option 51 in options
skipping option 54 in options
option found at offset 27 in options
option long value=4294967040
skipping option 53 in options
skipping option 58 in options
skipping option 59 in options
skipping option 51 in options
skipping option 54 in options
skipping option 1 in options
option found at offset 33 in options
option long value=3630513921
skipping option 53 in options
skipping option 58 in options
skipping option 59 in options
skipping option 51 in options
skipping option 54 in options
skipping option 1 in options
skipping option 3 in options
dhcp_check(netif=0x110667a8) et
dhcp_check(): set request timeout 500 msecs
dhcp_fine_tmr(): request timeout
dhcp_timeout()
dhcp_timeout(): CHECKING, ARP request timed out
dhcp_check(netif=0x110667a8) et
dhcp_check(): set request timeout 500 msecs
dhcp_fine_tmr(): request timeout
dhcp_timeout()
dhcp_timeout(): CHECKING, ARP request timed out
dhcp_check(netif=0x110667a8) et
dhcp_check(): set request timeout 500 msecs
dhcp_fine_tmr(): request timeout
dhcp_timeout()
dhcp_timeout(): CHECKING, ARP request timed out
dhcp_bind(netif=0x110667a8) et0
dhcp_bind(): t1 renewal timer 14400 secs
dhcp_bind(): set request timeout 14400000 msecs
dhcp_bind(): t2 rebind timer 25200 secs
dhcp_bind(): set request timeout 25200000 msecs
dhcp_bind(): IP: 0xd8653fd1
dhcp_bind(): SN: 0xffffff00
dhcp_bind(): GW: 0xd8653f01
dhcp_coarse_tmr()
//-----------------------------------------------------------------------------
No. Time Source Destination Protocol Info
62 23.608930 0.0.0.0 255.255.255.255 DHCP DHCP
Discover - Transaction ID 0xabcd0023
Frame 62 (350 bytes on wire, 350 bytes captured)
Ethernet II, Src: 00:08:4f:ff:ff:05, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 0.0.0.0 (0.0.0.0), Dst Addr: 255.255.255.255
(255.255.255.255)
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)
Bootstrap Protocol
Message type: Boot Request (1)
Hardware type: Ethernet
Hardware address length: 6
Hops: 0
Transaction ID: 0xabcd0023
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 0.0.0.0 (0.0.0.0)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 0.0.0.0 (0.0.0.0)
Client hardware address: 00:08:4f:ff:ff:05
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP Discover
Option 57: Maximum DHCP Message Size = 576
Option 55: Parameter Request List
End Option
Padding
No. Time Source Destination Protocol Info
63 23.656180 216.101.63.3 255.255.255.255 DHCP DHCP
Offer - Transaction ID 0xabcd0023
Frame 63 (342 bytes on wire, 342 bytes captured)
Ethernet II, Src: 00:d0:b7:e4:c5:94, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 216.101.63.3 (216.101.63.3), Dst Addr:
255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68)
Bootstrap Protocol
Message type: Boot Reply (2)
Hardware type: Ethernet
Hardware address length: 6
Hops: 0
Transaction ID: 0xabcd0023
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 216.101.63.209 (216.101.63.209)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 0.0.0.0 (0.0.0.0)
Client hardware address: 00:08:4f:ff:ff:05
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP Offer
Option 1: Subnet Mask = 255.255.255.0
Option 58: Renewal Time Value = 4 hours
Option 59: Rebinding Time Value = 7 hours
Option 51: IP Address Lease Time = 8 hours
Option 54: Server Identifier = 216.101.63.3
Option 3: Router = 216.101.63.1
End Option
Padding
No. Time Source Destination Protocol Info
64 23.771613 0.0.0.0 255.255.255.255 DHCP DHCP
Request - Transaction ID 0xabcd0024
Frame 64 (350 bytes on wire, 350 bytes captured)
Ethernet II, Src: 00:08:4f:ff:ff:05, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 0.0.0.0 (0.0.0.0), Dst Addr: 255.255.255.255
(255.255.255.255)
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)
Bootstrap Protocol
Message type: Boot Request (1)
Hardware type: Ethernet
Hardware address length: 6
Hops: 0
Transaction ID: 0xabcd0024
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 0.0.0.0 (0.0.0.0)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 0.0.0.0 (0.0.0.0)
Client hardware address: 00:08:4f:ff:ff:05
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP Request
Option 57: Maximum DHCP Message Size = 576
Option 50: Requested IP Address = 216.101.63.209
Option 54: Server Identifier = 216.101.63.3
Option 55: Parameter Request List
End Option
Padding
No. Time Source Destination Protocol Info
66 23.806127 216.101.63.3 255.255.255.255 DHCP DHCP
ACK - Transaction ID 0xabcd0024
Frame 66 (342 bytes on wire, 342 bytes captured)
Ethernet II, Src: 00:d0:b7:e4:c5:94, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 216.101.63.3 (216.101.63.3), Dst Addr:
255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68)
Bootstrap Protocol
Message type: Boot Reply (2)
Hardware type: Ethernet
Hardware address length: 6
Hops: 0
Transaction ID: 0xabcd0024
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 216.101.63.209 (216.101.63.209)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 0.0.0.0 (0.0.0.0)
Client hardware address: 00:08:4f:ff:ff:05
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP ACK
Option 58: Renewal Time Value = 4 hours
Option 59: Rebinding Time Value = 7 hours
Option 51: IP Address Lease Time = 8 hours
Option 54: Server Identifier = 216.101.63.3
Option 1: Subnet Mask = 255.255.255.0
Option 3: Router = 216.101.63.1
End Option
Padding
No. Time Source Destination Protocol Info
73 25.509543 0.0.0.0 255.255.255.255 DHCP DHCP
Discover - Transaction ID 0xabcd0026
Frame 73 (350 bytes on wire, 350 bytes captured)
Ethernet II, Src: 00:08:4f:ff:ff:05, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 0.0.0.0 (0.0.0.0), Dst Addr: 255.255.255.255
(255.255.255.255)
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)
Bootstrap Protocol
Message type: Boot Request (1)
Hardware type: Ethernet
Hardware address length: 6
Hops: 0
Transaction ID: 0xabcd0026
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 0.0.0.0 (0.0.0.0)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 0.0.0.0 (0.0.0.0)
Client hardware address: 00:08:4f:ff:ff:05
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP Discover
Option 57: Maximum DHCP Message Size = 576
Option 55: Parameter Request List
End Option
Padding
No. Time Source Destination Protocol Info
74 25.559247 216.101.63.3 255.255.255.255 DHCP DHCP
Offer - Transaction ID 0xabcd0026
Frame 74 (342 bytes on wire, 342 bytes captured)
Ethernet II, Src: 00:d0:b7:e4:c5:94, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 216.101.63.3 (216.101.63.3), Dst Addr:
255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68)
Bootstrap Protocol
Message type: Boot Reply (2)
Hardware type: Ethernet
Hardware address length: 6
Hops: 0
Transaction ID: 0xabcd0026
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 216.101.63.209 (216.101.63.209)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 0.0.0.0 (0.0.0.0)
Client hardware address: 00:08:4f:ff:ff:05
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP Offer
Option 1: Subnet Mask = 255.255.255.0
Option 58: Renewal Time Value = 4 hours
Option 59: Rebinding Time Value = 7 hours
Option 51: IP Address Lease Time = 8 hours
Option 54: Server Identifier = 216.101.63.3
Option 3: Router = 216.101.63.1
End Option
Padding
No. Time Source Destination Protocol Info
75 25.671743 0.0.0.0 255.255.255.255 DHCP DHCP
Request - Transaction ID 0xabcd0027
Frame 75 (350 bytes on wire, 350 bytes captured)
Ethernet II, Src: 00:08:4f:ff:ff:05, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 0.0.0.0 (0.0.0.0), Dst Addr: 255.255.255.255
(255.255.255.255)
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)
Bootstrap Protocol
Message type: Boot Request (1)
Hardware type: Ethernet
Hardware address length: 6
Hops: 0
Transaction ID: 0xabcd0027
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 0.0.0.0 (0.0.0.0)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 0.0.0.0 (0.0.0.0)
Client hardware address: 00:08:4f:ff:ff:05
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP Request
Option 57: Maximum DHCP Message Size = 576
Option 50: Requested IP Address = 216.101.63.209
Option 54: Server Identifier = 216.101.63.3
Option 55: Parameter Request List
End Option
Padding
No. Time Source Destination Protocol Info
76 25.708933 216.101.63.3 255.255.255.255 DHCP DHCP
ACK - Transaction ID 0xabcd0027
Frame 76 (342 bytes on wire, 342 bytes captured)
Ethernet II, Src: 00:d0:b7:e4:c5:94, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 216.101.63.3 (216.101.63.3), Dst Addr:
255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68)
Bootstrap Protocol
Message type: Boot Reply (2)
Hardware type: Ethernet
Hardware address length: 6
Hops: 0
Transaction ID: 0xabcd0027
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 216.101.63.209 (216.101.63.209)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 0.0.0.0 (0.0.0.0)
Client hardware address: 00:08:4f:ff:ff:05
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP ACK
Option 58: Renewal Time Value = 4 hours
Option 59: Rebinding Time Value = 7 hours
Option 51: IP Address Lease Time = 8 hours
Option 54: Server Identifier = 216.101.63.3
Option 1: Subnet Mask = 255.255.255.0
Option 3: Router = 216.101.63.1
End Option
Padding
No. Time Source Destination Protocol Info
105 37.873964 0.0.0.0 255.255.255.255 DHCP DHCP
Discover - Transaction ID 0xabcd0029
Frame 105 (350 bytes on wire, 350 bytes captured)
Ethernet II, Src: 00:08:4f:ff:ff:06, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 0.0.0.0 (0.0.0.0), Dst Addr: 255.255.255.255
(255.255.255.255)
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)
Bootstrap Protocol
Message type: Boot Request (1)
Hardware type: Ethernet
Hardware address length: 6
Hops: 0
Transaction ID: 0xabcd0029
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 0.0.0.0 (0.0.0.0)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 0.0.0.0 (0.0.0.0)
Client hardware address: 00:08:4f:ff:ff:06
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP Discover
Option 57: Maximum DHCP Message Size = 576
Option 55: Parameter Request List
End Option
Padding
No. Time Source Destination Protocol Info
106 37.927489 216.101.63.3 255.255.255.255 DHCP DHCP
Offer - Transaction ID 0xabcd0029
Frame 106 (342 bytes on wire, 342 bytes captured)
Ethernet II, Src: 00:d0:b7:e4:c5:94, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 216.101.63.3 (216.101.63.3), Dst Addr:
255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68)
Bootstrap Protocol
Message type: Boot Reply (2)
Hardware type: Ethernet
Hardware address length: 6
Hops: 0
Transaction ID: 0xabcd0029
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 216.101.63.209 (216.101.63.209)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 0.0.0.0 (0.0.0.0)
Client hardware address: 00:08:4f:ff:ff:06
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP Offer
Option 1: Subnet Mask = 255.255.255.0
Option 58: Renewal Time Value = 4 hours
Option 59: Rebinding Time Value = 7 hours
Option 51: IP Address Lease Time = 8 hours
Option 54: Server Identifier = 216.101.63.3
Option 3: Router = 216.101.63.1
End Option
Padding
No. Time Source Destination Protocol Info
107 38.036399 0.0.0.0 255.255.255.255 DHCP DHCP
Request - Transaction ID 0xabcd002a
Frame 107 (350 bytes on wire, 350 bytes captured)
Ethernet II, Src: 00:08:4f:ff:ff:06, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 0.0.0.0 (0.0.0.0), Dst Addr: 255.255.255.255
(255.255.255.255)
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)
Bootstrap Protocol
Message type: Boot Request (1)
Hardware type: Ethernet
Hardware address length: 6
Hops: 0
Transaction ID: 0xabcd002a
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 0.0.0.0 (0.0.0.0)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 0.0.0.0 (0.0.0.0)
Client hardware address: 00:08:4f:ff:ff:06
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP Request
Option 57: Maximum DHCP Message Size = 576
Option 50: Requested IP Address = 216.101.63.209
Option 54: Server Identifier = 216.101.63.3
Option 55: Parameter Request List
End Option
Padding
No. Time Source Destination Protocol Info
108 38.078148 216.101.63.3 255.255.255.255 DHCP DHCP
ACK - Transaction ID 0xabcd002a
Frame 108 (342 bytes on wire, 342 bytes captured)
Ethernet II, Src: 00:d0:b7:e4:c5:94, Dst: ff:ff:ff:ff:ff:ff
Internet Protocol, Src Addr: 216.101.63.3 (216.101.63.3), Dst Addr:
255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68)
Bootstrap Protocol
Message type: Boot Reply (2)
Hardware type: Ethernet
Hardware address length: 6
Hops: 0
Transaction ID: 0xabcd002a
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
Client IP address: 0.0.0.0 (0.0.0.0)
Your (client) IP address: 216.101.63.209 (216.101.63.209)
Next server IP address: 0.0.0.0 (0.0.0.0)
Relay agent IP address: 0.0.0.0 (0.0.0.0)
Client hardware address: 00:08:4f:ff:ff:06
Server host name not given
Boot file name not given
Magic cookie: (OK)
Option 53: DHCP Message Type = DHCP ACK
Option 58: Renewal Time Value = 4 hours
Option 59: Rebinding Time Value = 7 hours
Option 51: IP Address Lease Time = 8 hours
Option 54: Server Identifier = 216.101.63.3
Option 1: Subnet Mask = 255.255.255.0
Option 3: Router = 216.101.63.1
End Option
Padding
-----Original Message-----
From: address@hidden
[mailto:address@hidden Behalf
Of Leon Woestenberg
Sent: Thursday, June 24, 2004 3:12 PM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] DHCP and changing the MAC address
Hello Tom,
Tom C. Barker wrote:
> Thanks Leon.
> I did not use dhcp_release because of its static keyword and
> that it was not listed in the .h file. But, fixing these two,
> I ran it and it got even worse. I use ethereal constantly, so
>
Hmm, this part was very much less tested than bringing up the interface
using DHCP.
> here's the dump of what happens on stop, release, start with
> no other intervention: the module just loops on the coarse timer
> sends a discover and request every 10 seconds. It does not wait
> for a response from the discover.
>
Definitely a bug in dhcp.c then.
I have stripped the two messages down to the important fields:
> Destination: ff:ff:ff:ff:ff:ff (Broadcast)
> Source: 00:08:4f:ff:ff:08 (Qualstar_ff:ff:08)
> Source: 16.101.63.101 (16.101.63.101)
> Destination: 255.255.255.255 (255.255.255.255)
> Client IP address: 16.101.63.101 (16.101.63.101)
> Your (client) IP address: 0.0.0.0 (0.0.0.0)
> Next server IP address: 0.0.0.0 (0.0.0.0)
> Relay agent IP address: 0.0.0.0 (0.0.0.0)
> Client hardware address: 00:08:4f:ff:ff:08
> Option 53: DHCP Message Type = DHCP Discover
> Destination: ff:ff:ff:ff:ff:ff (Broadcast)
> Source: 00:08:4f:ff:ff:08 (Qualstar_ff:ff:08)
> Type: IP (0x0800)
> Client IP address: 16.101.63.101 (16.101.63.101)
> Your (client) IP address: 0.0.0.0 (0.0.0.0)
> Next server IP address: 0.0.0.0 (0.0.0.0)
> Relay agent IP address: 0.0.0.0 (0.0.0.0)
> Client hardware address: 00:08:4f:ff:ff:08
> Server host name not given
> Boot file name not given
> Magic cookie: (OK)
> Option 53: DHCP Message Type = DHCP Request
> Option 57: Maximum DHCP Message Size = 576
> Option 50: Requested IP Address = 16.101.63.200
> Option 54: Server Identifier = 16.101.63.3
>
The last two lines suggest that the lwIP host *did* receive
a OFFER response, from DHCP server 16.101.63.3, with an OFFER
for address 16.101.63.200.
Alternatively, the dhcp.c is broken and is acting on old state
information which is not cleared somehow.
Checking dhcp.c dhcp_start() clearly shows a memset() that should
clear new state fields, and _stop() free()s the old state and
removes the referencing pointer in netif. So, this seems OK.
There are no global variables (other than the transaction id) so
I am clueless what can cause this behaviour. Could you enable
lwIP in-code DHCP debugging?
Leon.
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