| 发表于：2007-03-27 11:57:032楼 得分:0 |
public function getstatuscode（status as long) as string
dim msg as string
select case status
case ip_success: msg = "ip success "
case ip_buf_too_small: msg = "ip buf too_small "
case ip_dest_net_unreachable: msg = "ip dest net unreachable "
case ip_dest_host_unreachable: msg = "ip dest host unreachable "
case ip_dest_prot_unreachable: msg = "ip dest prot unreachable "
case ip_dest_port_unreachable: msg = "ip dest port unreachable "
case ip_no_resources: msg = "ip no resources "
case ip_bad_option: msg = "ip bad option "
case ip_hw_error: msg = "ip hw_error "
case ip_packet_too_big: msg = "ip packet too_big "
case ip_req_timed_out: msg = "ip req timed out "
case ip_bad_req: msg = "ip bad req "
case ip_bad_route: msg = "ip bad route "
case ip_ttl_expired_transit: msg = "ip ttl expired transit "
case ip_ttl_expired_reassem: msg = "ip ttl expired reassem "
case ip_param_problem: msg = "ip param_problem "
case ip_source_quench: msg = "ip source quench "
case ip_option_too_big: msg = "ip option too_big "
case ip_bad_destination: msg = "ip bad destination "
case ip_addr_deleted: msg = "ip addr deleted "
case ip_spec_mtu_change: msg = "ip spec mtu change "
case ip_mtu_change: msg = "ip mtu_change "
case ip_unload: msg = "ip unload "
case ip_addr_added: msg = "ip addr added "
case ip_general_failure: msg = "ip general failure "
case ip_pending: msg = "ip pending "
case ping_timeout: msg = "ping timeout "
case else: msg = "unknown msg returned "
end select
getstatuscode = cstr（status) & " [ " & msg & " ] "
end function
public function hibyte（byval wparam as integer)
hibyte = wparam \ &h1 and &hff&
end function
public function lobyte（byval wparam as integer)
lobyte = wparam and &hff&
end function
public function ping（szaddress as string, echo as icmp_echo_reply) as long
dim hport as long
dim dwaddress as long
dim sdatatosend as string
dim iopt as long
sdatatosend = "echo this "
dwaddress = addressstringtolong（szaddress)
hport = icmpcreatefile（)
if icmpsendecho（hport, dwaddress, sdatatosend, len（sdatatosend), 0, echo, len（echo), ping_timeout) then
'the ping succeeded,
'.status will be 0
'.roundtriptime is the time in ms for the ping to complete,
'.data is the data returned （null terminated)
'.address is the ip address that actually replied
'.datasize is the size of the string in .data
ping = echo.roundtriptime
else
ping = echo.status * -1
end if
call icmpclosehandle（hport)
end function
function addressstringtolong（byval tmp as string) as long
dim i as integer
dim parts（1 to 4) as string
i = 0
'we have to extract each part of the
'123.456.789.123 string, delimited by
'a period
while instr（tmp, ". ") > 0
i = i + 1
parts（i) = mid（tmp, 1, instr（tmp, ". ") - 1)
tmp = mid（tmp, instr（tmp, ". ") + 1)
wend
i = i + 1
parts（i) = tmp
if i <> 4 then
addressstringtolong = 0
exit function
end if
'build the long value out of the
'hex of the extracted strings
addressstringtolong = val（ "&h " & right（ "00 " & hex（parts（4)), 2) & _
right（ "00 " & hex（parts（3)), 2) & _
right（ "00 " & hex（parts（2)), 2) & _
right（ "00 " & hex（parts（1)), 2))
end function
public function socketscleanup（) as boolean
dim x as long
x = wsacleanup（)
if x <> 0 then
msgbox "windows sockets error " & trim$（str$（x)) & " occurred in cleanup. ", vbexclamation
socketscleanup = false
else
socketscleanup = true
end if
end function
public function socketsinitialize（) as boolean
dim wsad as wsadata
dim x as integer
dim szlobyte as string, szhibyte as string, szbuf as string
x = wsastartup（ws_version_reqd, wsad)
if x <> 0 then
msgbox "windows sockets for 32 bit windows " & "environments is not successfully responding. "
socketsinitialize = false
exit function
end if
if lobyte（wsad.wversion) < ws_version_major or （lobyte（wsad.wversion) = ws_version_major and hibyte（wsad.wversion) < ws_version_minor) then
szhibyte = trim$（str$（hibyte（wsad.wversion)))
szlobyte = trim$（str$（lobyte（wsad.wversion)))
szbuf = "windows sockets version " & szlobyte & ". " & szhibyte
szbuf = szbuf & " is not supported by windows " & "sockets for 32 bit windows environments. "
msgbox szbuf, vbexclamation
socketsinitialize = false
exit function
end if
if wsad.wmaxsockets < min_sockets_reqd then
szbuf = "this application requires a minimum of " & trim$（str$（min_sockets_reqd)) & " supported sockets. "
msgbox szbuf, vbexclamation
socketsinitialize = false
exit function
end if
socketsinitialize = true
end function
在form中添加一个命令按钮command1，一个文本框text2，创建一个textbox数组（text1（0)到text1（5))。在窗体中写入如下代码：
private sub command1_click（)
dim echo as icmp_echo_reply
dim pos as integer
call ping（text2.text, echo)
text1（0) = getstatuscode（echo.status)
text1（1) = echo.address
text1（2) = echo.roundtriptime & " ms "
text1（3) = echo.datasize & " bytes "
if left$（echo.data, 1) <> chr$（0) then
pos = instr（echo.data, chr$（0))
text1（4) = left$（echo.data, pos - 1)
end if
text1（5) = echo.datapointer
end sub | | |
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