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DHCPDISCOVER now includes option 55 (Parameter Request List) which seems to be required for some DHCP servers to send back values for router and DNS server

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git-svn-id: http://svn.code.sf.net/p/netboot65/code@205 93682198-c243-4bdb-bd91-e943c89aac3b
This commit is contained in:
jonnosan 2009-10-20 10:33:59 +00:00
parent fcce859d2d
commit c4772efba2
1 changed files with 24 additions and 12 deletions
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36
client/ip65/dhcp.s
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@ -281,14 +281,13 @@ send_dhcpdiscover:
lda #$80 ;broadcast flag =1, all other bits 0
sta output_buffer+dhcp_flags
lda #53 ;option 53 - DHCP message type
sta output_buffer+dhcp_options+0
lda #1 ;option length is 1
sta output_buffer+dhcp_options+1
lda #DHCPDISCOVER
sta output_buffer+dhcp_options+2
lda #$FF ;option FF = end of options
sta output_buffer+dhcp_options+3
ldx #dhcp_discover_options_length ; set destination address
:
lda dhcp_discover_options,x
sta output_buffer+dhcp_options,x
dex
bpl :-
ldx #3 ; set destination address
lda #$FF ; des = 255.255.255.255 (broadcast)
@ -296,7 +295,7 @@ send_dhcpdiscover:
dex
bpl :-
ldax #dhcp_options+4
ldax #dhcp_options+dhcp_discover_options_length
stax udp_send_len
ldax #output_buffer
jsr udp_send
@ -307,6 +306,19 @@ send_dhcpdiscover:
sta dhcp_state
rts
dhcp_discover_options:
.byte 53 ;option 53 - DHCP message type
.byte 1 ;option length =1
.byte DHCPDISCOVER ; message type
.byte 55 ; option 55 - Parameter Request List
.byte 3 ;option length
.byte 1 ; subnet mask
.byte 3 ; router (gateway)
.byte 6 ; DNS server
.byte $FF ; end of options
dhcp_discover_options_length=*-dhcp_discover_options
;got a message on port 68
dhcp_in:
@ -374,7 +386,7 @@ dhcp_in:
@not_gateway:
cmp #6 ;option 3 6 is dns server
cmp #6 ;option 6 is dns server
bne @not_dns_server
lda dhcp_inp+dhcp_options+2,x
sta cfg_dns
@ -460,9 +472,9 @@ send_dhcprequest:
;A still = option FF = end of options
sta output_buffer+dhcp_options+17
sta output_buffer+dhcp_options+15
ldax #dhcp_options+18
ldax #dhcp_options+16
stax udp_send_len
ldax #output_buffer