mirror of
https://github.com/bobbimanners/emailler.git
synced 2024-09-01 20:29:09 +00:00
348 lines
6.2 KiB
ArmAsm
348 lines
6.2 KiB
ArmAsm
;this is some very quick and dirty glue to make the most useful IP65 functions available via a single entry point.
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;this allows user applications to be developed that don't link ip65 in directly, rather they use an instance of ip65 that is preloaded (or in a cartridge/ROM)
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;this whole file could (and should) be greatly optimised by making it all table driven, but since this file is probably only going to be used in a bankswitched ROM where
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;space is not at such a premium, I'll go with the gross hack for now.
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.ifndef NB65_API_VERSION_NUMBER
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.define EQU =
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.include "../inc/nb65_constants.i"
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.endif
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.include "../inc/common.i"
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.include "../inc/commonprint.i"
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.export nb65_dispatcher
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.import ip65_init
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.import dhcp_init
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.import cfg_get_configuration_ptr
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.import tftp_load_address
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.importzp tftp_filename
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.import tftp_ip
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.import tftp_directory_listing
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.import ip65_error
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.import tftp_clear_callbacks
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.import tftp_download
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.import tftp_set_download_callback
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.import dns_ip
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.import dns_resolve
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.import dns_set_hostname
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.import udp_callback
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.import udp_add_listener
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.import ip_inp
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.import udp_inp
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.import udp_send
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.import udp_send_src
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.import udp_send_src_port
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.import udp_send_dest
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.import udp_send_dest_port
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.import udp_send_len
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.import copymem
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.import cfg_mac
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.importzp copy_src
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.importzp copy_dest
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;reuse the copy_src zero page location
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nb65_params = copy_src
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.data
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old_ax: .res 2
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jmp_old_irq:
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jmp $0000
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irq_handler_installed_flag:
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.byte 0
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.code
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irq_handler:
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jsr NB65_VBL_VECTOR
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jmp jmp_old_irq
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set_tftp_params:
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ldy #NB65_TFTP_IP
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lda (nb65_params),y
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sta tftp_ip
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iny
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lda (nb65_params),y
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sta tftp_ip+1
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iny
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lda (nb65_params),y
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sta tftp_ip+2
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iny
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lda (nb65_params),y
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sta tftp_ip+3
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ldy #NB65_TFTP_FILENAME
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lda (nb65_params),y
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sta tftp_filename
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iny
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lda (nb65_params),y
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sta tftp_filename+1
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ldy #NB65_TFTP_POINTER
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lda (nb65_params),y
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sta tftp_load_address
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iny
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lda (nb65_params),y
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sta tftp_load_address+1
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jsr tftp_clear_callbacks
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rts
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nb65_dispatcher:
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stax nb65_params
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stax old_ax
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cpy #NB65_INITIALIZE
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bne :+
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lda irq_handler_installed_flag
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bne irq_handler_installed
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;install our IRQ handler
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ldax $314 ;previous IRQ handler
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stax jmp_old_irq+1
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sei ;don't want any interrupts while we fiddle with the vector
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ldax #irq_handler
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stax $314 ;previous IRQ handler
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cli
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sta irq_handler_installed_flag
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jsr ip65_init
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jmp dhcp_init
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irq_handler_installed:
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clc
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rts
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:
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cpy #NB65_GET_IP_CONFIG
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bne :+
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ldax #cfg_mac
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clc
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rts
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:
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cpy #NB65_TFTP_DIRECTORY_LISTING
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bne :+
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jsr set_tftp_params
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bcs @tftp_error
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jsr tftp_directory_listing
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@after_tftp_call: ;write the current load address back to the param buffer (so if $0000 was passed in, the caller can find out the actual value used)
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bcs @tftp_error
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ldax old_ax
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stax nb65_params
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ldy #NB65_TFTP_POINTER
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lda tftp_load_address
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sta (nb65_params),y
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iny
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lda tftp_load_address+1
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sta (nb65_params),y
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clc
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@tftp_error:
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@dns_error:
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rts
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:
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cpy #NB65_TFTP_DOWNLOAD
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bne :+
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jsr set_tftp_params
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jsr tftp_download
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jmp @after_tftp_call
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:
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cpy #NB65_DNS_RESOLVE
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bne :+
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ldy #NB65_DNS_HOSTNAME+1
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lda (nb65_params),y
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tax
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dey
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lda (nb65_params),y
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jsr dns_set_hostname
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bcs @dns_error
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jsr dns_resolve
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bcs @dns_error
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ldy #NB65_DNS_HOSTNAME_IP
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ldx #4
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@copy_dns_ip:
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lda dns_ip,y
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sta (nb65_params),y
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iny
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dex
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bne @copy_dns_ip
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rts
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:
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cpy #NB65_UDP_ADD_LISTENER
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bne :+
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ldy #NB65_UDP_LISTENER_CALLBACK
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lda (nb65_params),y
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sta udp_callback
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iny
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lda (nb65_params),y
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sta udp_callback+1
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ldy #NB65_UDP_LISTENER_PORT+1
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lda (nb65_params),y
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tax
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dey
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lda (nb65_params),y
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jmp udp_add_listener
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:
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cpy #NB65_GET_INPUT_PACKET_INFO
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bne :+
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ldy #3
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@copy_src_ip:
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lda ip_inp+12,y ;src IP
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sta (nb65_params),y
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dey
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bpl @copy_src_ip
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ldy #NB65_REMOTE_PORT
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lda udp_inp+1 ;src port (lo byte)
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sta (nb65_params),y
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iny
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lda udp_inp+0 ;src port (high byte)
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sta (nb65_params),y
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iny
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lda udp_inp+3 ;dest port (lo byte)
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sta (nb65_params),y
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iny
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lda udp_inp+2 ;dest port (high byte)
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sta (nb65_params),y
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iny
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sec
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lda udp_inp+5 ;payload length (lo byte)
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sbc #8 ;to remove length of header
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sta (nb65_params),y
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iny
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lda udp_inp+4 ;payload length (hi byte)
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sbc #0 ;in case there was a carry from the lo byte
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sta (nb65_params),y
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iny
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lda #<(udp_inp+8) ;payload ptr (lo byte)
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sta (nb65_params),y
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iny
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lda #>(udp_inp+8) ;payload ptr (hi byte)
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sta (nb65_params),y
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clc
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rts
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:
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cpy #NB65_SEND_UDP_PACKET
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bne :+
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ldy #3
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@copy_dest_ip:
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lda (nb65_params),y
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sta udp_send_dest,y
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dey
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bpl @copy_dest_ip
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ldy #NB65_REMOTE_PORT
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lda (nb65_params),y
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sta udp_send_dest_port
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iny
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lda (nb65_params),y
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sta udp_send_dest_port+1
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iny
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lda (nb65_params),y
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sta udp_send_src_port
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iny
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lda (nb65_params),y
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sta udp_send_src_port+1
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iny
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lda (nb65_params),y
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sta udp_send_len
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iny
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lda (nb65_params),y
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sta udp_send_len+1
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iny
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;AX should point at data to send
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lda (nb65_params),y
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pha
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iny
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lda (nb65_params),y
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tax
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pla
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jmp udp_send
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:
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cpy #NB65_DEACTIVATE
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bne :+
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ldax jmp_old_irq+1
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sei ;don't want any interrupts while we fiddle with the vector
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stax $314 ;previous IRQ handler
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cli
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clc
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rts
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:
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cpy #NB65_TFTP_CALLBACK_DOWNLOAD
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bne :+
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jsr set_tftp_params
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ldy #NB65_TFTP_POINTER+1
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lda (nb65_params),y
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tax
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dey
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lda (nb65_params),y
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jsr tftp_set_download_callback
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jmp tftp_download
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:
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cpy #NB65_PRINT_ASCIIZ
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bne :+
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jsr print
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clc
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rts
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:
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cpy #NB65_PRINT_HEX
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bne :+
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jsr print_hex
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clc
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rts
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:
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cpy #NB65_PRINT_DOTTED_QUAD
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bne :+
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jsr print_dotted_quad
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clc
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rts
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:
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cpy #NB65_PRINT_IP_CONFIG
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bne :+
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jsr print_ip_config
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clc
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rts
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:
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cpy #NB65_GET_LAST_ERROR
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bne :+
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lda ip65_error
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clc
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rts
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:
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;default function handler
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lda #NB65_ERROR_FUNCTION_NOT_SUPPORTED
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sta ip65_error
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sec ;carry flag set = error
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rts |