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