Re: bin/46423: dhcpcd does not send hostname to server, even if requested to do.

[Roy Marples <roy%marples.name@localhost>]

The following reply was made to PR bin/46423; it has been noted by GNATS.

From: Roy Marples <roy%marples.name@localhost>
To: <gnats-bugs%netbsd.org@localhost>
Cc: 
Subject: Re: bin/46423: dhcpcd does not send hostname to server, even if
 requested to do.
Date: Mon, 07 May 2012 21:19:45 +0100

 dhcpcd-5.1.3 on my amd64 NetBSD-5.1 server works fine
 Here's a tcpdump demonstrating this.
 
 With "hostname fooey" in /etc/dhcpcd.conf
 
 uberserver$ sudo tcpdump -i rtk0 -vvv -s 0 port bootps                  
                                                                          
                                                                          
           [0,62/62]
 tcpdump: listening on rtk0, link-type EN10MB (Ethernet), capture size 
 65535 byte
 s
 21:01:04.934412 IP (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto 
 UDP (17)
 , length 328) 0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] 
 BOOTP/DHCP,
 Request from 00:e0:4c:e5:0a:fd (oui Unknown), length 300, xid 
 0x6ef352b0, Flags
 [none] (0x0000)
            Client-Ethernet-Address 00:e0:4c:e5:0a:fd (oui Unknown)
            Vendor-rfc1048 Extensions
              Magic Cookie 0x63825363
              DHCP-Message Option 53, length 1: Discover
              Requested-IP Option 50, length 4: 10.73.0.199
              MSZ Option 57, length 2: 1500
              Vendor-Class Option 60, length 12: "dhcpcd 5.1.3"
              Hostname Option 12, length 5: "fooey"
              Parameter-Request Option 55, length 12:
                Subnet-Mask, Static-Route, Default-Gateway, 
 Domain-Name-Server
                Hostname, Domain-Name, BR, NTP
                Lease-Time, RN, RB, Option 119
              END Option 255, length 0
              PAD Option 0, length 0, occurs 11
 
 With just "hostname" in /etc/dhcpcd.conf
 
 uberserver$ sudo tcpdump -i rtk0 -vvv -s 0 port bootps
 tcpdump: listening on rtk0, link-type EN10MB (Ethernet), capture size 
 65535 bytes
 21:05:07.654348 IP (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto 
 UDP (17), length 328) 0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum 
 ok] BOOTP/DHCP, Request from 00:e0:4c:e5:0a:fd (oui Unknown), length 
 300, xid 0xb990a884, Fla
 gs [none] (0x0000)
            Client-Ethernet-Address 00:e0:4c:e5:0a:fd (oui Unknown)
            Vendor-rfc1048 Extensions
              Magic Cookie 0x63825363
              DHCP-Message Option 53, length 1: Discover
              Requested-IP Option 50, length 4: 10.73.0.199
              MSZ Option 57, length 2: 1500
              Vendor-Class Option 60, length 12: "dhcpcd 5.1.3"
              Hostname Option 12, length 10: "uberserver"
              Parameter-Request Option 55, length 12:
                Subnet-Mask, Static-Route, Default-Gateway, 
 Domain-Name-Server
                Hostname, Domain-Name, BR, NTP
                Lease-Time, RN, RB, Option 119
              END Option 255, length 0
              PAD Option 0, length 0, occurs 6
 
 
 So the question now becomes why do you think dhcpcd is at fault? Maybe 
 your DHCP server is discarding the information.
 Can you post a tcpdump from your machine showing your DHCP message?
 
 Thanks
 
 Roy