mirror of
https://github.com/dschmenk/PLASMA.git
synced 2024-11-01 07:07:48 +00:00
TFTP server and fix FOR/NEXT in module init bug
This commit is contained in:
David Schmenk
parent
0a1f497d6c
commit
4db8271a25
@ -3,11 +3,6 @@
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//
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//
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include "inc/cmdsys.plh"
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include "inc/cmdsys.plh"
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//
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//
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// Module don't free memory
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//
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const modkeep = $2000
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const modinitkeep = $4000
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//
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// Indirect interpreter DEFinition entrypoint
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// Indirect interpreter DEFinition entrypoint
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//
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//
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struc t_defentry
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struc t_defentry
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@ -3,11 +3,6 @@
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//
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//
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include "inc/cmdsys.plh"
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include "inc/cmdsys.plh"
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//
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//
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// Module don't free memory
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//
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const modkeep = $2000
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const modinitkeep = $4000
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//
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// Indirect interpreter DEFinition entrypoint
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// Indirect interpreter DEFinition entrypoint
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//
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//
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struc t_defentry
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struc t_defentry
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@ -11,10 +11,10 @@ end
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//
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//
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// Uthernet register offsets
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// Uthernet register offsets
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//
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//
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const TX_DATA = $00
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const TX_DATA = $00
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const RX_DATA = $00
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const RX_DATA = $00
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const TX_CMD = $04
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const TX_CMD = $04
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const TX_LEN = $06
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const TX_LEN = $06
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const INT_STATUS = $08
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const INT_STATUS = $08
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const PREG_INDEX = $0A
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const PREG_INDEX = $0A
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const PREG_DATA = $0C
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const PREG_DATA = $0C
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@ -238,9 +238,7 @@ for slot = $90 to $F0 step $10
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//
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//
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// Install etherip driver
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// Install etherip driver
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//
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//
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puts("Found Uthernet I in slot #")
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puts("Found Uthernet I in slot #"); putc('0' + ((slot - $80) >> 4)); putln
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putc('0' + ((slot - $80) >> 4))
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putln
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setEtherDriver(@utherMAC, @peekfrmlen, @peekfrm, @pokefrmlen, @pokefrm)
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setEtherDriver(@utherMAC, @peekfrmlen, @peekfrm, @pokefrmlen, @pokefrm)
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return modkeep
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return modkeep
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fin
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fin
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@ -137,7 +137,6 @@ word bcast = IP_BROADCAST, IP_BROADCAST
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//
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//
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// ICMP type/codes
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// ICMP type/codes
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//
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//
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const IP_PROTO_ICMP = 1
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const ICMP_ECHO_REQST = 8
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const ICMP_ECHO_REQST = 8
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const ICMP_ECHO_REPLY = 0
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const ICMP_ECHO_REPLY = 0
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//
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//
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@ -52,7 +52,6 @@ const IP_PROTO_TCP = $06
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//
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//
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// ICMP type/codes
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// ICMP type/codes
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//
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//
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const IP_PROTO_ICMP = 1
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const ICMP_ECHO_REQST = 8
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const ICMP_ECHO_REQST = 8
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const ICMP_ECHO_REPLY = 0
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const ICMP_ECHO_REPLY = 0
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//
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//
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@ -101,7 +100,7 @@ const ARP_REQST = $0100 // BE format
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const ARP_REPLY = $0200 // BE format
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const ARP_REPLY = $0200 // BE format
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struc t_arp
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struc t_arp
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word arp_hw
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word arp_hw
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word arp_proto
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word arp_prot
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byte arp_hlen
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byte arp_hlen
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byte arp_plen
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byte arp_plen
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word arp_op
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word arp_op
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@ -155,8 +154,8 @@ struc t_notify
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word notify_func
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word notify_func
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word notify_parm
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word notify_parm
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end
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end
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byte[t_notify * MAX_UDP_NOTIFIES] portsUDP
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byte[t_notify] portsUDP[MAX_UDP_NOTIFIES]
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byte[t_notify * MAX_TCP_NOTIFIES] portsTCP
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byte[t_notify] portsTCP[MAX_TCP_NOTIFIES]
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//
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//
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// Service ICMP hook
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// Service ICMP hook
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//
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//
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@ -54,12 +54,6 @@ def iNetSetDNS(ipptr)
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return 0
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return 0
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end
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end
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//def putb(hexb)
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// return call($FDDA, hexb, 0, 0, 0)
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//end
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//def puth(hex)
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// return call($F941, hex >> 8, hex, 0, 0)
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//end
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//def dumpbytes(buf, len)
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//def dumpbytes(buf, len)
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// word i
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// word i
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//
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//
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@ -205,11 +199,13 @@ def iNetResolve(namestr, ipaddr)
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end
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end
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def iNetInit
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def iNetInit
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word retcode
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//
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//
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// Look for net hardware
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// Look for net hardware
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//
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//
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while ^driver
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while ^driver
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if cmdsys:modexec(driver) >= 0
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retcode = cmdsys:modexec(driver)
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if retcode >= 0
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//
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//
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// Get an IP address
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// Get an IP address
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//
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//
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@ -988,7 +988,7 @@ def compiler(defptr)#0
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if not (codeptr->14 & $80) // Unresolved address list
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if not (codeptr->14 & $80) // Unresolved address list
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addrxlate=>[dest] = codeptr + 13 - *jitcodeptr
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addrxlate=>[dest] = codeptr + 13 - *jitcodeptr
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fin
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fin
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codeptr = codeptr + 5
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codeptr = codeptr + 15
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A_IS_TOS = FALSE
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A_IS_TOS = FALSE
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break
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break
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is $A2 // BRLT - FOR/NEXT SPECIFIC TEST & BRANCH
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is $A2 // BRLT - FOR/NEXT SPECIFIC TEST & BRANCH
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@ -44,6 +44,7 @@ ETHERIP = rel/ETHERIP\#FE1000
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INET = rel/INET\#FE1000
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INET = rel/INET\#FE1000
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DHCP = rel/DHCP\#FE1000
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DHCP = rel/DHCP\#FE1000
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HTTPD = rel/HTTPD\#FE1000
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HTTPD = rel/HTTPD\#FE1000
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TFTPD = rel/TFTPD\#FE1000
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DGR = rel/apple/DGR\#FE1000
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DGR = rel/apple/DGR\#FE1000
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GRAFIX = rel/apple/GRAFIX\#FE1000
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GRAFIX = rel/apple/GRAFIX\#FE1000
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GFXDEMO = rel/apple/GFXDEMO\#FE1000
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GFXDEMO = rel/apple/GFXDEMO\#FE1000
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@ -83,7 +84,7 @@ TXTTYPE = .TXT
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#SYSTYPE = \#FF2000
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#SYSTYPE = \#FF2000
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#TXTTYPE = \#040000
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#TXTTYPE = \#040000
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apple: $(PLVMZP_APL) $(PLASM) $(PLVM) $(PLVM01) $(PLVM02) $(PLVMJIT) $(PLVM802) $(PLVM03) $(CMD) $(CMDJIT) $(JIT) $(JIT16) $(JITUNE) $(SOSCMD) $(PLASMAPLASM) $(CODEOPT) $(ARGS) $(MEMMGR) $(MEMTEST) $(FIBER) $(FIBERTEST) $(LONGJMP) $(ED) $(MON) $(SOS) $(ROD) $(SIEVE) $(UTHERNET2) $(UTHERNET) $(ETHERIP) $(INET) $(DHCP) $(HTTPD) $(ROGUE) $(ROGUEMAP) $(ROGUECOMBAT) $(GRAFIX) $(GFXDEMO) $(DGR) $(DGRTEST) $(FILEIO_APL) $(CONIO_APL) $(JOYBUZZ) $(PORTIO) $(SPIPORT) $(SDFAT) $(FATCAT) $(FATGET) $(FATPUT) $(FATWDSK) $(FATRDSK) $(SANE) $(FPSTR) $(FPU) $(SANITY) $(LZ4) $(LZ4CAT) $(RPNCALC) $(SNDSEQ) $(PLAYSEQ)
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apple: $(PLVMZP_APL) $(PLASM) $(PLVM) $(PLVM01) $(PLVM02) $(PLVMJIT) $(PLVM802) $(PLVM03) $(CMD) $(CMDJIT) $(JIT) $(JIT16) $(JITUNE) $(SOSCMD) $(PLASMAPLASM) $(CODEOPT) $(ARGS) $(MEMMGR) $(MEMTEST) $(FIBER) $(FIBERTEST) $(LONGJMP) $(ED) $(MON) $(SOS) $(ROD) $(SIEVE) $(UTHERNET2) $(UTHERNET) $(ETHERIP) $(INET) $(DHCP) $(HTTPD) $(TFTPD) $(ROGUE) $(ROGUEMAP) $(ROGUECOMBAT) $(GRAFIX) $(GFXDEMO) $(DGR) $(DGRTEST) $(FILEIO_APL) $(CONIO_APL) $(JOYBUZZ) $(PORTIO) $(SPIPORT) $(SDFAT) $(FATCAT) $(FATGET) $(FATPUT) $(FATWDSK) $(FATRDSK) $(SANE) $(FPSTR) $(FPU) $(SANITY) $(LZ4) $(LZ4CAT) $(RPNCALC) $(SNDSEQ) $(PLAYSEQ)
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-rm vmsrc/plvmzp.inc
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-rm vmsrc/plvmzp.inc
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c64: $(PLVMZP_C64) $(PLASM) $(PLVM) $(PLVMC64)
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c64: $(PLVMZP_C64) $(PLASM) $(PLVM) $(PLVMC64)
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@ -285,6 +286,10 @@ $(HTTPD): samplesrc/httpd.pla $(PLVM02) $(PLASM)
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./$(PLASM) -AMOW < samplesrc/httpd.pla > samplesrc/httpd.a
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./$(PLASM) -AMOW < samplesrc/httpd.pla > samplesrc/httpd.a
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acme --setpc 4094 -o $(HTTPD) samplesrc/httpd.a
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acme --setpc 4094 -o $(HTTPD) samplesrc/httpd.a
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$(TFTPD): samplesrc/tftpd.pla $(PLVM02) $(PLASM)
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./$(PLASM) -AMOW < samplesrc/tftpd.pla > samplesrc/tftpd.a
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acme --setpc 4094 -o $(TFTPD) samplesrc/tftpd.a
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$(UTHERNET): libsrc/apple/uthernet.pla $(PLVM02) $(PLASM)
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$(UTHERNET): libsrc/apple/uthernet.pla $(PLVM02) $(PLASM)
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./$(PLASM) -AMOW < libsrc/apple/uthernet.pla > libsrc/apple/uthernet.a
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./$(PLASM) -AMOW < libsrc/apple/uthernet.pla > libsrc/apple/uthernet.a
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acme --setpc 4094 -o $(UTHERNET) libsrc/apple/uthernet.a
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acme --setpc 4094 -o $(UTHERNET) libsrc/apple/uthernet.a
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@ -70,6 +70,7 @@ cp rel/apple/GFXDEMO#FE1000 prodos/demos/apple3/GFXDEMO.REL
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cp samplesrc/APPLE3.PIX#060000 prodos/demos/apple3/APPLE3.PIX.BIN
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cp samplesrc/APPLE3.PIX#060000 prodos/demos/apple3/APPLE3.PIX.BIN
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mkdir prodos/demos/net
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mkdir prodos/demos/net
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cp rel/TFTPD#FE1000 prodos/demos/net/TFTPD.REL
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cp rel/HTTPD#FE1000 prodos/demos/net/HTTPD.REL
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cp rel/HTTPD#FE1000 prodos/demos/net/HTTPD.REL
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cp samplesrc/index.html prodos/demos/net/INDEX.HTML.TXT
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cp samplesrc/index.html prodos/demos/net/INDEX.HTML.TXT
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497
src/samplesrc/tftpd.pla
Normal file
497
src/samplesrc/tftpd.pla
Normal file
@ -0,0 +1,497 @@
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//
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// TFTP Daemon
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//
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include "inc/cmdsys.plh"
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include "inc/inet.plh"
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include "inc/fileio.plh"
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include "inc/conio.plh"
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//
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// TFTP values
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//
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const TFTP_PORT = 69
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const TID_INC = $0010
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const RRQ = $0100
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const WRQ = $0200
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const DATAPKT = $0300
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const ACKPKT = $0400
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const ERRPKT = $0500
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struc t_errPkt
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word errOp
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word errCode
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byte errStr[]
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byte errStrNull
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end
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struc t_ackPkt
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word ackOp
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word ackBlock
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end
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struc t_datPkt
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word datOp
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word datBlock
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byte datBytes[]
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end
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res[t_errPkt] tftpError = $00, $05, $00, $00, $00
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res[t_ackPkt] tftpAck = $00, $04, $00, $00
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//
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// Current file operations
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//
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byte ref, type, , netscii, filename[256]
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word aux, block
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word buff, TID = $1001
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word portTFTP, portTID
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//
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// Swap bytes in word
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//
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asm swab(val)
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!SOURCE "vmsrc/plvmzp.inc"
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LDA ESTKL,X
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LDY ESTKH,X
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STA ESTKH,X
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STY ESTKL,X
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RTS
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end
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//
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// Translate 'in' value to 'out' value
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//
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asm xlat(in, out, buf, len)#0
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INX
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INX
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INX
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INX
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LDA ESTKL-4,X
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ORA ESTKH-4,X
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BEQ XLATEX
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LDA ESTKL-3,X
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STA SRCL
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LDA ESTKH-3,X
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STA SRCH
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LDA ESTKL-1,X
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LDY ESTKL-4,X
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BEQ XLATLP
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INC ESTKH-4,X
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LDY #$00
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XLATLP CMP (SRC),Y
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BNE +
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LDA ESTKL-2,X
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STA (SRC),Y
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LDA ESTKL-1,X
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+ INY
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BNE +
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INC DSTH
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INC SRCH
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+ DEC ESTKL-4,X
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BNE XLATLP
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DEC ESTKH-4,X
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BNE XLATLP
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XLATEX RTS
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end
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//
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// Convert byte to two hex chars
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//
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def btoh(cptr, b)#0
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byte h
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h = ((b >> 4) & $0F) + '0'
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if h > '9'
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h = h + 7
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fin
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^cptr = h
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cptr++
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h = (b & $0F) + '0'
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if h > '9'
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h = h + 7
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fin
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^cptr = h
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end
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def hexByte(hexChars)
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byte lo, hi
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lo = toupper(^(hexChars + 1)) - '0'
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if lo > 9
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lo = lo - 7
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fin
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hi = toupper(^hexChars) - '0'
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if hi > 9
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hi = hi - 7
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fin
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return (hi << 4) | lo
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end
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def hexWord(hexChars)
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return (hexByte(hexChars) << 8) | hexByte(hexChars + 2)
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end
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def mkProName(netName, proName)#3
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byte n, l, ascii, proType
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word proAux
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proType = $02 // default to BIN
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proAux = $0000 // default to 0
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//
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// Check for CiderPress style extension
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//
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for l = 0 to 255
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if netName->[l] == 0; break; fin
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next
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ascii = toupper(netName->[l + 1]) == 'N' // Netscii mode
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if l > 7 and ^(netName + l - 7) == '#'
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proType = hexByte(netName + l - 6)
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proAux = hexWord(netName + l - 4)
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l = l - 7
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fin
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memcpy(proName + 1, netName, l)
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^proName = l
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return ascii, proType, proAux
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end
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def mkNetName(proName, netName)
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word l, n
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byte fileinfo[t_fileinfo]
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if !fileio:getfileinfo(proName, @fileinfo)
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//
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// Scan backward looking for dir seperator
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//
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l = ^proName
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for n = l downto 1
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if ^(proName + n) == '/'
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break
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fin
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next
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memcpy(netName + 1, proName + 1 + n, l - n)
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^netName = l - n + 7
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//
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// Build CiderPress style extension
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//
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n = netName + ^netName - 6
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^n = '#'
|
||||||
|
btoh(n + 1, fileinfo.file_type)
|
||||||
|
btoh(n + 3, fileinfo.aux_type.1)
|
||||||
|
btoh(n + 5, fileinfo.aux_type)
|
||||||
|
else
|
||||||
|
//
|
||||||
|
// Error getting info on file
|
||||||
|
//
|
||||||
|
puts("Error reading "); puts(proName); putln
|
||||||
|
return -1
|
||||||
|
fin
|
||||||
|
return 0
|
||||||
|
end
|
||||||
|
|
||||||
|
def readUDP(ipsrc, portsrc, data, len, param)
|
||||||
|
word err
|
||||||
|
|
||||||
|
err = 0
|
||||||
|
when *data
|
||||||
|
is $0500 // Error
|
||||||
|
err = *data
|
||||||
|
is $0400 // Ack
|
||||||
|
if swab(data=>ackBlock) <> block
|
||||||
|
puts("RRQ: Out-of-sequence block\n")
|
||||||
|
err = $0800 // Out-of-sequence block
|
||||||
|
break
|
||||||
|
fin
|
||||||
|
if param == 512 // Size of initial read
|
||||||
|
param = fileio:read(ref, buff+datBytes, 512)
|
||||||
|
if netscii
|
||||||
|
xlat($0D, $0A, buff+datBytes, param)
|
||||||
|
fin
|
||||||
|
block++
|
||||||
|
buff=>datBlock = swab(block)
|
||||||
|
iNet:sendUDP(portTID, ipsrc, portsrc, buff, t_datPkt + param)
|
||||||
|
fin
|
||||||
|
if err
|
||||||
|
tftpError:errCode = err
|
||||||
|
iNet:sendUDP(portTID, ipsrc, portsrc, @tftpError, t_errPkt)
|
||||||
|
fin
|
||||||
|
if param < 512 or err
|
||||||
|
//
|
||||||
|
// All done
|
||||||
|
//
|
||||||
|
iNet:closeUDP(portTID)
|
||||||
|
fileio:close(ref)
|
||||||
|
ref = 0
|
||||||
|
fin
|
||||||
|
break
|
||||||
|
otherwise
|
||||||
|
puts("TFTP: RRQ Unexpected packet opcode: $"); puth(*data); putln
|
||||||
|
wend
|
||||||
|
return 0
|
||||||
|
end
|
||||||
|
def writeUDP(ipsrc, portsrc, data, len, param)
|
||||||
|
word err
|
||||||
|
|
||||||
|
err = 0
|
||||||
|
when *data
|
||||||
|
is $0300 // Data packet
|
||||||
|
if swab(data=>datBlock) <> block
|
||||||
|
puts("WRQ: Out-of-sequence block\n")
|
||||||
|
err = $0800 // Out-of-sequence block
|
||||||
|
break
|
||||||
|
fin
|
||||||
|
len = len - t_datPkt
|
||||||
|
if netscii
|
||||||
|
xlat($0A, $0D, buff+datBytes, len)
|
||||||
|
fin
|
||||||
|
if fileio:write(ref, data+datBytes, len) <> len
|
||||||
|
puts("WRQ: File write error\n")
|
||||||
|
tftpError:errCode = $0300 // Disk full error
|
||||||
|
break
|
||||||
|
fin
|
||||||
|
if not err
|
||||||
|
tftpAck:ackBlock = swab(block)
|
||||||
|
block++
|
||||||
|
iNet:sendUDP(portTID, ipsrc, portsrc, @tftpAck, t_ackPkt)
|
||||||
|
else
|
||||||
|
tftpError:errCode = err
|
||||||
|
iNet:sendUDP(portTID, ipsrc, portsrc, @tftpError, t_errPkt)
|
||||||
|
fin
|
||||||
|
if len < 512 or err
|
||||||
|
//
|
||||||
|
// All done
|
||||||
|
//
|
||||||
|
iNet:closeUDP(portTID)
|
||||||
|
fileio:close(ref)
|
||||||
|
ref = 0
|
||||||
|
fin
|
||||||
|
break
|
||||||
|
otherwise
|
||||||
|
puts("WRQ: Unexpected packet opcode: $"); puth(*data); putln
|
||||||
|
wend
|
||||||
|
return 0
|
||||||
|
end
|
||||||
|
def servUDP(ipsrc, portsrc, data, len, param)
|
||||||
|
when *data
|
||||||
|
is RRQ // Read request
|
||||||
|
//
|
||||||
|
// Initiate file read
|
||||||
|
//
|
||||||
|
if ref
|
||||||
|
//
|
||||||
|
// File already open and active
|
||||||
|
//
|
||||||
|
tftpError:errCode = $0300 // Allocation exceeded
|
||||||
|
iNet:sendUDP(portTFTP, ipsrc, portsrc, @tftpError, t_errPkt)
|
||||||
|
return 0
|
||||||
|
fin
|
||||||
|
//
|
||||||
|
// Extract filename
|
||||||
|
//
|
||||||
|
netscii, type, aux = mkProName(data + 2, @filename)
|
||||||
|
ref = fileio:open(@filename)
|
||||||
|
if not ref
|
||||||
|
puts("Error opening file: "); puts(@filename)
|
||||||
|
puts(", Error: "); putb(perr); putln
|
||||||
|
tftpError:errCode = $0100 // File not found
|
||||||
|
iNet:sendUDP(portTFTP, ipsrc, portsrc, @tftpError, t_errPkt)
|
||||||
|
return 0
|
||||||
|
fin
|
||||||
|
puts("Reading file: "); puts(@filename); putln
|
||||||
|
TID = (TID + TID_INC) | $1000
|
||||||
|
block = 1
|
||||||
|
buff=>datBlock = swab(block)
|
||||||
|
len = fileio:read(ref, buff+datBytes, 512)
|
||||||
|
if netscii
|
||||||
|
xlat($0D, $0A, buff+datBytes, 512)
|
||||||
|
fin
|
||||||
|
portTID = iNet:openUDP(TID, @readUDP, len)
|
||||||
|
iNet:sendUDP(portTID, ipsrc, portsrc, buff, t_datPkt + len)
|
||||||
|
break
|
||||||
|
is WRQ // Write request
|
||||||
|
//
|
||||||
|
// Initiate file write
|
||||||
|
//
|
||||||
|
if ref
|
||||||
|
//
|
||||||
|
// File already open and active
|
||||||
|
//
|
||||||
|
tftpError:errCode = $0300 // Allocation exceeded
|
||||||
|
iNet:sendUDP(portTFTP, ipsrc, portsrc, @tftpError, t_errPkt)
|
||||||
|
return 0
|
||||||
|
fin
|
||||||
|
//
|
||||||
|
// Extract filename
|
||||||
|
//
|
||||||
|
netscii, type, aux = mkProName(data + 2, @filename)
|
||||||
|
fileio:destroy(@filename)
|
||||||
|
if fileio:create(@filename, type, aux)
|
||||||
|
puts("Create file error: "); putb(perr); putln
|
||||||
|
fin
|
||||||
|
ref = fileio:open(@filename)
|
||||||
|
if not ref
|
||||||
|
puts("Error opening file: "); puts(@filename)
|
||||||
|
puts(", Error: "); putb(perr); putln
|
||||||
|
tftpError:errCode = $0200 // Access violation
|
||||||
|
iNet:sendUDP(portTFTP, ipsrc, portsrc, @tftpError, t_errPkt)
|
||||||
|
return 0
|
||||||
|
fin
|
||||||
|
puts("Writing file: "); puts(@filename); putln
|
||||||
|
TID = (TID + TID_INC) | $1000
|
||||||
|
block = 1
|
||||||
|
tftpAck:ackBlock = 0
|
||||||
|
portTID = iNet:openUDP(TID, @writeUDP, 0)
|
||||||
|
iNet:sendUDP(portTID, ipsrc, portsrc, @tftpAck, t_ackPkt)
|
||||||
|
break
|
||||||
|
otherwise
|
||||||
|
puts("TFTP: Server Unexpected packet opcode: $"); puth(*data); putln
|
||||||
|
wend
|
||||||
|
return 0
|
||||||
|
end
|
||||||
|
|
||||||
|
if !iNet:initIP()
|
||||||
|
return -1
|
||||||
|
fin
|
||||||
|
puts("TFTP Daemon Version 0.1\n")
|
||||||
|
portTFTP = iNet:openUDP(TFTP_PORT, @servUDP, 0)
|
||||||
|
//
|
||||||
|
// Alloc aligned file/io buffers
|
||||||
|
//
|
||||||
|
buff = heapalloc(t_datPkt + 512)
|
||||||
|
buff=>datOp = $0300 // Data op
|
||||||
|
//
|
||||||
|
// Service IP
|
||||||
|
//
|
||||||
|
repeat
|
||||||
|
iNet:serviceIP()
|
||||||
|
until conio:keypressed()
|
||||||
|
done
|
||||||
|
|
||||||
|
Experpts from: RFC 1350, TFTP Revision 2, July 1992
|
||||||
|
|
||||||
|
TFTP Formats
|
||||||
|
|
||||||
|
Type Op # Format without header
|
||||||
|
|
||||||
|
2 bytes string 1 byte string 1 byte
|
||||||
|
-----------------------------------------------
|
||||||
|
RRQ/ | 01/02 | Filename | 0 | Mode | 0 |
|
||||||
|
WRQ -----------------------------------------------
|
||||||
|
2 bytes 2 bytes n bytes
|
||||||
|
---------------------------------
|
||||||
|
DATA | 03 | Block # | Data |
|
||||||
|
---------------------------------
|
||||||
|
2 bytes 2 bytes
|
||||||
|
-------------------
|
||||||
|
ACK | 04 | Block # |
|
||||||
|
--------------------
|
||||||
|
2 bytes 2 bytes string 1 byte
|
||||||
|
----------------------------------------
|
||||||
|
ERROR | 05 | ErrorCode | ErrMsg | 0 |
|
||||||
|
----------------------------------------
|
||||||
|
|
||||||
|
Initial Connection Protocol for reading a file
|
||||||
|
|
||||||
|
1. Host A sends a "RRQ" to host B with source= A's TID,
|
||||||
|
destination= 69.
|
||||||
|
|
||||||
|
2. Host B sends a "DATA" (with block number= 1) to host A with
|
||||||
|
source= B's TID, destination= A's TID.
|
||||||
|
|
||||||
|
Error Codes
|
||||||
|
|
||||||
|
Value Meaning
|
||||||
|
|
||||||
|
0 Not defined, see error message (if any).
|
||||||
|
1 File not found.
|
||||||
|
2 Access violation.
|
||||||
|
3 Disk full or allocation exceeded.
|
||||||
|
4 Illegal TFTP operation.
|
||||||
|
5 Unknown transfer ID.
|
||||||
|
6 File already exists.
|
||||||
|
7 No such user.
|
||||||
|
|
||||||
|
Internet User Datagram Header [2]
|
||||||
|
|
||||||
|
(This has been included only for convenience. TFTP need not be
|
||||||
|
implemented on top of the Internet User Datagram Protocol.)
|
||||||
|
|
||||||
|
Format
|
||||||
|
|
||||||
|
0 1 2 3
|
||||||
|
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||||||
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||||
|
| Source Port | Destination Port |
|
||||||
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||||
|
| Length | Checksum |
|
||||||
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||||||
|
|
||||||
|
|
||||||
|
Values of Fields
|
||||||
|
|
||||||
|
|
||||||
|
Source Port Picked by originator of packet.
|
||||||
|
|
||||||
|
Dest. Port Picked by destination machine (69 for RRQ or WRQ).
|
||||||
|
|
||||||
|
Length Number of bytes in UDP packet, including UDP header.
|
||||||
|
|
||||||
|
Checksum Reference 2 describes rules for computing checksum.
|
||||||
|
(The implementor of this should be sure that the
|
||||||
|
correct algorithm is used here.)
|
||||||
|
Field contains zero if unused.
|
||||||
|
|
||||||
|
Note: TFTP passes transfer identifiers (TID's) to the Internet User
|
||||||
|
Datagram protocol to be used as the source and destination ports.
|
||||||
|
|
||||||
|
|
||||||
|
A transfer is established by sending a request (WRQ to write onto a
|
||||||
|
foreign file system, or RRQ to read from it), and receiving a
|
||||||
|
positive reply, an acknowledgment packet for write, or the first data
|
||||||
|
packet for read. In general an acknowledgment packet will contain
|
||||||
|
the block number of the data packet being acknowledged. Each data
|
||||||
|
packet has associated with it a block number; block numbers are
|
||||||
|
consecutive and begin with one. Since the positive response to a
|
||||||
|
write request is an acknowledgment packet, in this special case the
|
||||||
|
block number will be zero. (Normally, since an acknowledgment packet
|
||||||
|
is acknowledging a data packet, the acknowledgment packet will
|
||||||
|
contain the block number of the data packet being acknowledged.) If
|
||||||
|
the reply is an error packet, then the request has been denied.
|
||||||
|
|
||||||
|
In order to create a connection, each end of the connection chooses a
|
||||||
|
TID for itself, to be used for the duration of that connection. The
|
||||||
|
TID's chosen for a connection should be randomly chosen, so that the
|
||||||
|
probability that the same number is chosen twice in immediate
|
||||||
|
succession is very low. Every packet has associated with it the two
|
||||||
|
TID's of the ends of the connection, the source TID and the
|
||||||
|
destination TID. These TID's are handed to the supporting UDP (or
|
||||||
|
other datagram protocol) as the source and destination ports. A
|
||||||
|
requesting host chooses its source TID as described above, and sends
|
||||||
|
its initial request to the known TID 69 decimal (105 octal) on the
|
||||||
|
serving host. The response to the request, under normal operation,
|
||||||
|
uses a TID chosen by the server as its source TID and the TID chosen
|
||||||
|
for the previous message by the requestor as its destination TID.
|
||||||
|
The two chosen TID's are then used for the remainder of the transfer.
|
||||||
|
|
||||||
|
As an example, the following shows the steps used to establish a
|
||||||
|
connection to write a file. Note that WRQ, ACK, and DATA are the
|
||||||
|
names of the write request, acknowledgment, and data types of packets
|
||||||
|
respectively. The appendix contains a similar example for reading a
|
||||||
|
file.
|
||||||
|
|
||||||
|
1. Host A sends a "WRQ" to host B with source= A's TID,
|
||||||
|
destination= 69.
|
||||||
|
|
||||||
|
2. Host B sends a "ACK" (with block number= 0) to host A with
|
||||||
|
source= B's TID, destination= A's TID.
|
||||||
|
|
||||||
|
At this point the connection has been established and the first data
|
||||||
|
packet can be sent by Host A with a sequence number of 1. In the
|
||||||
|
next step, and in all succeeding steps, the hosts should make sure
|
||||||
|
that the source TID matches the value that was agreed on in steps 1
|
||||||
|
and 2. If a source TID does not match, the packet should be
|
||||||
|
discarded as erroneously sent from somewhere else. An error packet
|
||||||
|
should be sent to the source of the incorrect packet, while not
|
||||||
|
disturbing the transfer. This can be done only if the TFTP in fact
|
||||||
|
receives a packet with an incorrect TID. If the supporting protocols
|
||||||
|
do not allow it, this particular error condition will not arise.
|
||||||
|
|
||||||
|
The following example demonstrates a correct operation of the
|
||||||
|
protocol in which the above situation can occur. Host A sends a
|
||||||
|
request to host B. Somewhere in the network, the request packet is
|
||||||
|
duplicated, and as a result two acknowledgments are returned to host
|
||||||
|
A, with different TID's chosen on host B in response to the two
|
||||||
|
requests. When the first response arrives, host A continues the
|
||||||
|
connection. When the second response to the request arrives, it
|
||||||
|
should be rejected, but there is no reason to terminate the first
|
||||||
|
connection. Therefore, if different TID's are chosen for the two
|
||||||
|
connections on host B and host A checks the source TID's of the
|
||||||
|
messages it receives, the first connection can be maintained while
|
||||||
|
the second is rejected by returning an error packet.
|
||||||
@ -89,6 +89,16 @@ int idconst_add(char *name, int len, int value)
|
|||||||
printf("Constant count overflow\n");
|
printf("Constant count overflow\n");
|
||||||
return (0);
|
return (0);
|
||||||
}
|
}
|
||||||
|
if (idconst_lookup(name, len) > 0)
|
||||||
|
{
|
||||||
|
parse_error("const/global name conflict\n");
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
if (idglobal_lookup(name, len) > 0)
|
||||||
|
{
|
||||||
|
parse_error("global label already defined\n");
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
name[len] = '\0';
|
name[len] = '\0';
|
||||||
emit_idconst(name, value);
|
emit_idconst(name, value);
|
||||||
name[len] = c;
|
name[len] = c;
|
||||||
|
|||||||
@ -17,7 +17,7 @@ const pushbttn2 = $C062
|
|||||||
const pushbttn3 = $C063
|
const pushbttn3 = $C063
|
||||||
const keyboard = $C000
|
const keyboard = $C000
|
||||||
const keystrobe = $C010
|
const keystrobe = $C010
|
||||||
const cmdline = $01FF
|
const inputln = $01FF
|
||||||
//
|
//
|
||||||
// ASCII key values
|
// ASCII key values
|
||||||
//
|
//
|
||||||
|
|||||||
@ -1119,19 +1119,19 @@ int parse_stmnt(void)
|
|||||||
parse_error("CONTINUE without loop");
|
parse_error("CONTINUE without loop");
|
||||||
break;
|
break;
|
||||||
case RETURN_TOKEN:
|
case RETURN_TOKEN:
|
||||||
|
cfnvals = stack_loop;
|
||||||
|
while (cfnvals >= 2)
|
||||||
|
{
|
||||||
|
emit_drop2();
|
||||||
|
cfnvals -= 2;
|
||||||
|
}
|
||||||
|
if (cfnvals)
|
||||||
|
{
|
||||||
|
emit_drop();
|
||||||
|
cfnvals--;
|
||||||
|
}
|
||||||
if (infunc)
|
if (infunc)
|
||||||
{
|
{
|
||||||
int i;
|
|
||||||
|
|
||||||
i = stack_loop;
|
|
||||||
while (i >= 2)
|
|
||||||
{
|
|
||||||
emit_drop2();
|
|
||||||
i -= 2;
|
|
||||||
}
|
|
||||||
if (i)
|
|
||||||
emit_drop();
|
|
||||||
cfnvals = 0;
|
|
||||||
emit_seq(parse_list(NULL, &cfnvals));
|
emit_seq(parse_list(NULL, &cfnvals));
|
||||||
if (cfnvals > infuncvals)
|
if (cfnvals > infuncvals)
|
||||||
parse_error("Too many return values");
|
parse_error("Too many return values");
|
||||||
|
|||||||
@ -872,15 +872,15 @@ def parse_stmnt
|
|||||||
fin
|
fin
|
||||||
break
|
break
|
||||||
is RETURN_TKN
|
is RETURN_TKN
|
||||||
|
i = stack_loop
|
||||||
|
while i >= 2
|
||||||
|
emit_code(DROP2_CODE)
|
||||||
|
i = i - 2
|
||||||
|
loop
|
||||||
|
if i
|
||||||
|
emit_code(DROP_CODE)
|
||||||
|
fin
|
||||||
if infunc
|
if infunc
|
||||||
i = stack_loop
|
|
||||||
while i >= 2
|
|
||||||
emit_code(DROP2_CODE)
|
|
||||||
i = i - 2
|
|
||||||
loop
|
|
||||||
if i
|
|
||||||
emit_code(DROP_CODE)
|
|
||||||
fin
|
|
||||||
seq, cfnvals = parse_list
|
seq, cfnvals = parse_list
|
||||||
emit_seq(seq)
|
emit_seq(seq)
|
||||||
if cfnvals > infuncvals
|
if cfnvals > infuncvals
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user