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Fix #156 and refactor osnet.nim (#157) 

* Refactor osnet.nim to not use `result`.
Fix #156.

* Fix linux compilation error.
This commit is contained in:
Eugene Kabanov 2021-02-25 23:04:56 +02:00 committed by GitHub
parent d6a39e46e1
commit eb6e32605f
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1 changed files with 282 additions and 236 deletions
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chronos/transports/osnet.nim
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@ -255,83 +255,86 @@ type
gateway*: TransportAddress
metric*: int
proc broadcast*(ifa: InterfaceAddress): TransportAddress {.inline.} =
proc broadcast*(ifa: InterfaceAddress): TransportAddress =
## Return broadcast address for ``ifa``.
result = ifa.net.broadcast()
ifa.net.broadcast()
proc network*(ifa: InterfaceAddress): TransportAddress {.inline.} =
proc network*(ifa: InterfaceAddress): TransportAddress =
## Return network address for ``ifa``.
result = ifa.net.network()
ifa.net.network()
proc netmask*(ifa: InterfaceAddress): TransportAddress {.inline.} =
proc netmask*(ifa: InterfaceAddress): TransportAddress =
## Return network mask for ``ifa``.
result = ifa.net.subnetMask()
ifa.net.subnetMask()
proc init*(ift: typedesc[InterfaceAddress], address: TransportAddress,
prefix: int): InterfaceAddress =
## Initialize ``InterfaceAddress`` using ``address`` and prefix length
## ``prefix``.
result.host = address
result.net = IpNet.init(address, prefix)
InterfaceAddress(host: address, net: IpNet.init(address, prefix))
proc `$`*(ifa: InterfaceAddress): string {.inline.} =
proc `$`*(ifa: InterfaceAddress): string =
## Return string representation of ``ifa``.
if ifa.host.family == AddressFamily.IPv4:
result = $ifa.net
$ifa.net
elif ifa.host.family == AddressFamily.IPv6:
result = $ifa.net
$ifa.net
else:
"Unknown"
proc `$`*(iface: NetworkInterface): string =
## Return string representation of network interface ``iface``.
result = $iface.ifIndex
if len(result) == 1:
result.add(". ")
var res = $iface.ifIndex
if len(res) == 1:
res.add(". ")
else:
result.add(". ")
result.add(iface.name)
res.add(". ")
res.add(iface.name)
when defined(windows):
result.add(" [")
result.add(iface.desc)
result.add("]")
result.add(": flags = ")
result.add($iface.flags)
result.add(" mtu ")
result.add($iface.mtu)
result.add(" state ")
result.add($iface.state)
result.add("\n ")
result.add($iface.ifType)
result.add(" ")
res.add(" [")
res.add(iface.desc)
res.add("]")
res.add(": flags = ")
res.add($iface.flags)
res.add(" mtu ")
res.add($iface.mtu)
res.add(" state ")
res.add($iface.state)
res.add("\n ")
res.add($iface.ifType)
res.add(" ")
if iface.maclen > 0:
for i in 0..<iface.maclen:
result.add(toHex(iface.mac[i]))
res.add(toHex(iface.mac[i]))
if i < iface.maclen - 1:
result.add(":")
res.add(":")
for item in iface.addresses:
result.add("\n ")
res.add("\n ")
if item.host.family == AddressFamily.IPv4:
result.add("inet ")
res.add("inet ")
elif item.host.family == AddressFamily.IPv6:
result.add("inet6 ")
result.add($item)
result.add(" netmask ")
result.add($(item.netmask().address()))
result.add(" brd ")
result.add($(item.broadcast().address()))
res.add("inet6 ")
res.add($item)
res.add(" netmask ")
res.add($(item.netmask().address()))
res.add(" brd ")
res.add($(item.broadcast().address()))
res
proc `$`*(route: Route): string =
result = $route.dest.address()
result.add(" via ")
var res = $route.dest.address()
res.add(" via ")
if route.gateway.family != AddressFamily.None:
result.add("gateway ")
result.add($route.gateway.address())
res.add("gateway ")
res.add($route.gateway.address())
else:
result.add("link")
result.add(" src ")
result.add($route.source.address())
res.add("link")
res.add(" src ")
res.add($route.source.address())
res
proc cmp*(a, b: NetworkInterface): int =
result = cmp(a.ifIndex, b.ifIndex)
cmp(a.ifIndex, b.ifIndex)
when defined(linux):
import posix
@ -507,19 +510,19 @@ when defined(linux):
template NLMSG_LENGTH(length: int): uint32 =
uint32(NLMSG_HDRLEN() + length)
proc NLMSG_OK(nlh: ptr NlMsgHeader, length: int): bool {.inline.} =
result = (length >= int(sizeof(NlMsgHeader))) and
(nlh.nlmsg_len >= uint32(sizeof(NlMsgHeader))) and
(nlh.nlmsg_len <= uint32(length))
proc NLMSG_OK(nlh: ptr NlMsgHeader, length: int): bool =
(length >= int(sizeof(NlMsgHeader))) and
(nlh.nlmsg_len >= uint32(sizeof(NlMsgHeader))) and
(nlh.nlmsg_len <= uint32(length))
proc NLMSG_NEXT(nlh: ptr NlMsgHeader,
length: var int): ptr NlMsgHeader {.inline.} =
length: var int): ptr NlMsgHeader =
length = length - int(NLMSG_ALIGN(uint(nlh.nlmsg_len)))
result = cast[ptr NlMsgHeader](cast[uint](nlh) +
cast[uint](NLMSG_ALIGN(uint(nlh.nlmsg_len))))
cast[ptr NlMsgHeader](cast[uint](nlh) +
cast[uint](NLMSG_ALIGN(uint(nlh.nlmsg_len))))
proc NLMSG_DATA(nlh: ptr NlMsgHeader): ptr byte {.inline.} =
result = cast[ptr byte](cast[uint](nlh) + NLMSG_LENGTH(0))
proc NLMSG_DATA(nlh: ptr NlMsgHeader): ptr byte =
cast[ptr byte](cast[uint](nlh) + NLMSG_LENGTH(0))
proc NLMSG_TAIL(nlh: ptr NlMsgHeader): ptr byte {.inline.} =
cast[ptr byte](cast[uint](nlh) + NLMSG_ALIGN(uint(nlh.nlmsg_len)))
@ -536,87 +539,88 @@ when defined(linux):
template RTA_PAYLOAD*(length: uint): uint =
length - RTA_LENGTH(0)
proc IFLA_RTA(r: ptr byte): ptr RtAttr {.inline.} =
proc IFLA_RTA(r: ptr byte): ptr RtAttr =
cast[ptr RtAttr](cast[uint](r) + NLMSG_ALIGN(uint(sizeof(IfInfoMessage))))
proc IFA_RTA(r: ptr byte): ptr RtAttr {.inline.} =
proc IFA_RTA(r: ptr byte): ptr RtAttr =
cast[ptr RtAttr](cast[uint](r) + NLMSG_ALIGN(uint(sizeof(IfAddrMessage))))
proc RT_RTA(r: ptr byte): ptr RtAttr {.inline.} =
proc RT_RTA(r: ptr byte): ptr RtAttr =
cast[ptr RtAttr](cast[uint](r) + NLMSG_ALIGN(uint(sizeof(RtMessage))))
proc RTA_OK(rta: ptr RtAttr, length: int): bool {.inline.} =
result = length >= sizeof(RtAttr) and
rta.rta_len >= cushort(sizeof(RtAttr)) and
rta.rta_len <= cushort(length)
proc RTA_OK(rta: ptr RtAttr, length: int): bool =
length >= sizeof(RtAttr) and
rta.rta_len >= cushort(sizeof(RtAttr)) and
rta.rta_len <= cushort(length)
proc RTA_NEXT(rta: ptr RtAttr, length: var int): ptr RtAttr {.inline.} =
proc RTA_NEXT(rta: ptr RtAttr, length: var int): ptr RtAttr =
length = length - int(RTA_ALIGN(uint(rta.rta_len)))
result = cast[ptr RtAttr](cast[uint](rta) +
cast[uint](RTA_ALIGN(uint(rta.rta_len))))
cast[ptr RtAttr](cast[uint](rta) +
cast[uint](RTA_ALIGN(uint(rta.rta_len))))
proc RTA_DATA(rta: ptr RtAttr): ptr byte {.inline.} =
result = cast[ptr byte](cast[uint](rta) + RTA_LENGTH(0))
proc RTA_DATA(rta: ptr RtAttr): ptr byte =
cast[ptr byte](cast[uint](rta) + RTA_LENGTH(0))
proc toInterfaceState(it: cint, flags: cuint): InterfaceState {.inline.} =
proc toInterfaceState(it: cint, flags: cuint): InterfaceState =
case it
of 1:
result = StatusNotPresent
StatusNotPresent
of 2:
result = StatusDown
StatusDown
of 3:
result = StatusLowerLayerDown
StatusLowerLayerDown
of 4:
result = StatusTesting
StatusTesting
of 5:
result = StatusDormant
StatusDormant
of 6:
result = StatusUp
StatusUp
else:
result = StatusUnknown
StatusUnknown
proc toInterfaceType(ft: uint32): InterfaceType {.inline.} =
proc toInterfaceType(ft: uint32): InterfaceType =
case ft
of ARPHRD_ETHER, ARPHRD_EETHER:
result = IfEthernetCsmacd
IfEthernetCsmacd
of ARPHRD_LOOPBACK:
result = IfSoftwareLoopback
IfSoftwareLoopback
of 787..799:
result = IfFibreChannel
IfFibreChannel
of ARPHRD_PPP:
result = IfPpp
IfPpp
of ARPHRD_SLIP, ARPHRD_CSLIP, ARPHRD_SLIP6, ARPHRD_CSLIP6:
result = IfSlip
IfSlip
of ARPHRD_IEEE1394:
result = IfIeee1394
IfIeee1394
of ARPHRD_IEEE80211, ARPHRD_IEEE80211_PRISM, ARPHRD_IEEE80211_RADIOTAP:
result = IfIeee80211
IfIeee80211
of ARPHRD_ATM:
result = IfAtm
IfAtm
of ARPHRD_HDLC:
result = IfHdlc
IfHdlc
of ARPHRD_HIPPI:
result = IfHippiInterface
IfHippiInterface
of ARPHRD_ARCNET:
result = IfArcNet
IfArcNet
of ARPHRD_LAPB:
result = IfLapB
IfLapB
of ARPHRD_FRAD:
result = IfFrameRelay
IfFrameRelay
else:
result = IfOther
IfOther
proc createNetlinkSocket(pid: Pid): SocketHandle =
var address: SockAddr_nl
address.family = cushort(AF_NETLINK)
address.groups = 0
address.pid = cast[uint32](pid)
result = posix.socket(AF_NETLINK, posix.SOCK_DGRAM, NETLINK_ROUTE)
if result != SocketHandle(-1):
if posix.bindSocket(result, cast[ptr SockAddr](addr address),
var res = posix.socket(AF_NETLINK, posix.SOCK_DGRAM, NETLINK_ROUTE)
if res != SocketHandle(-1):
if posix.bindSocket(res, cast[ptr SockAddr](addr address),
Socklen(sizeof(SockAddr_nl))) != 0:
discard posix.close(result)
result = SocketHandle(-1)
discard posix.close(res)
res = SocketHandle(-1)
res
proc sendLinkMessage(fd: SocketHandle, pid: Pid, seqno: uint32,
ntype: uint16, nflags: uint16): bool =
@ -642,8 +646,7 @@ when defined(linux):
rmsg.msg_name = cast[pointer](addr address)
rmsg.msg_namelen = Socklen(sizeof(SockAddr_nl))
let res = posix.sendmsg(fd, addr rmsg, 0).TIovLen
if res == iov.iov_len:
result = true
(res == iov.iov_len)
proc sendRouteMessage(fd: SocketHandle, pid: Pid, seqno: uint32,
ntype: uint16, nflags: uint16,
@ -691,8 +694,7 @@ when defined(linux):
rmsg.msg_name = cast[pointer](addr address)
rmsg.msg_namelen = Socklen(sizeof(SockAddr_nl))
let res = posix.sendmsg(fd, addr rmsg, 0).TIovLen
if res == iov.iov_len:
result = true
(res == iov.iov_len)
proc readNetlinkMessage(fd: SocketHandle, data: var seq[byte]): bool =
var
@ -709,9 +711,10 @@ when defined(linux):
var length = posix.recvmsg(fd, addr rmsg, 0)
if length >= 0:
data.setLen(length)
result = true
true
else:
data.setLen(0)
false
proc processLink(msg: ptr NlMsgHeader): NetworkInterface =
var iface: ptr IfInfoMessage
@ -722,34 +725,41 @@ when defined(linux):
length = int(msg.nlmsg_len) - int(NLMSG_LENGTH(sizeof(IfInfoMessage)))
attr = IFLA_RTA(cast[ptr byte](iface))
result.ifType = toInterfaceType(iface.ifi_type)
result.ifIndex = iface.ifi_index
result.flags = cast[uint64](iface.ifi_flags)
var res = NetworkInterface(
ifType: toInterfaceType(iface.ifi_type),
ifIndex: iface.ifi_index,
flags: cast[uint64](iface.ifi_flags)
)
while RTA_OK(attr, length):
if attr.rta_type == IFLA_IFNAME:
var p = cast[cstring](RTA_DATA(attr))
result.name = $p
res.name = $p
elif attr.rta_type == IFLA_ADDRESS:
var p = cast[ptr byte](RTA_DATA(attr))
var plen = min(int(RTA_PAYLOAD(uint(attr.rta_len))), len(result.mac))
copyMem(addr result.mac[0], p, plen)
result.maclen = plen
var plen = min(int(RTA_PAYLOAD(uint(attr.rta_len))), len(res.mac))
copyMem(addr res.mac[0], p, plen)
res.maclen = plen
elif attr.rta_type == IFLA_MTU:
var p = cast[ptr uint32](RTA_DATA(attr))
result.mtu = cast[int](p[])
res.mtu = cast[int](p[])
elif attr.rta_type == IFLA_OPERSTATE:
var p = cast[ptr byte](RTA_DATA(attr))
result.state = toInterfaceState(cast[cint](p[]), iface.ifi_flags)
res.state = toInterfaceState(cast[cint](p[]), iface.ifi_flags)
attr = RTA_NEXT(attr, length)
res
proc getAddress(f: int, p: pointer): TransportAddress {.inline.} =
proc getAddress(f: int, p: pointer): TransportAddress =
if f == posix.AF_INET:
result = TransportAddress(family: AddressFamily.IPv4)
copyMem(addr result.address_v4[0], p, len(result.address_v4))
var res = TransportAddress(family: AddressFamily.IPv4)
copyMem(addr res.address_v4[0], p, len(res.address_v4))
res
elif f == posix.AF_INET6:
result = TransportAddress(family: AddressFamily.IPv6)
copyMem(addr result.address_v6[0], p, len(result.address_v6))
var res = TransportAddress(family: AddressFamily.IPv6)
copyMem(addr res.address_v6[0], p, len(res.address_v6))
res
else:
TransportAddress(family: AddressFamily.None)
proc processAddress(msg: ptr NlMsgHeader): NetworkInterface =
var iaddr: ptr IfAddrMessage
@ -762,7 +772,7 @@ when defined(linux):
attr = IFA_RTA(cast[ptr byte](iaddr))
let family = cast[int](iaddr.ifa_family)
result.ifIndex = cast[int](iaddr.ifa_index)
var res = NetworkInterface(ifIndex: cast[int](iaddr.ifa_index))
var address, local: TransportAddress
@ -775,38 +785,41 @@ when defined(linux):
if local.family != AddressFamily.None:
address = local
if len(result.addresses) == 0:
result.addresses = newSeq[InterfaceAddress]()
let prefixLength = cast[int](iaddr.ifa_prefixlen)
let ifaddr = InterfaceAddress.init(address, prefixLength)
result.addresses.add(ifaddr)
res.addresses.add(ifaddr)
res
proc processRoute(msg: ptr NlMsgHeader): Route =
var rtmsg = cast[ptr RtMessage](NLMSG_DATA(msg))
var length = int(msg.nlmsg_len) - int(NLMSG_LENGTH(sizeof(RtMessage)))
var attr = RT_RTA(cast[ptr byte](rtmsg))
var res = Route()
while RTA_OK(attr, length):
if attr.rta_type == RTA_DST:
result.dest = getAddress(int(rtmsg.rtm_family),
res.dest = getAddress(int(rtmsg.rtm_family),
cast[pointer](RTA_DATA(attr)))
elif attr.rta_type == RTA_GATEWAY:
result.gateway = getAddress(int(rtmsg.rtm_family),
res.gateway = getAddress(int(rtmsg.rtm_family),
cast[pointer](RTA_DATA(attr)))
elif attr.rta_type == RTA_OIF:
var oid: uint32
copyMem(addr oid, RTA_DATA(attr), sizeof(uint32))
result.ifIndex = int(oid)
res.ifIndex = int(oid)
elif attr.rta_type == RTA_PREFSRC:
result.source = getAddress(int(rtmsg.rtm_family),
res.source = getAddress(int(rtmsg.rtm_family),
cast[pointer](RTA_DATA(attr)))
attr = RTA_NEXT(attr, length)
res
proc getRoute(netfd: SocketHandle, pid: Pid,
address: TransportAddress): Route =
if not sendRouteMessage(netfd, pid, 1, RTM_GETROUTE,
NLM_F_REQUEST, address):
return
return Route()
var data = newSeq[byte]()
var res = Route()
while true:
if not readNetlinkMessage(netfd, data):
break
@ -818,19 +831,21 @@ when defined(linux):
endflag = true
break
else:
result = processRoute(msg)
res = processRoute(msg)
endflag = true
break
msg = NLMSG_NEXT(msg, length)
if endflag:
break
res
proc getLinks(netfd: SocketHandle, pid: Pid): seq[NetworkInterface] =
var res: seq[NetworkInterface]
if not sendLinkMessage(netfd, pid, 1, RTM_GETLINK,
NLM_F_REQUEST or NLM_F_DUMP):
return
return res
var data = newSeq[byte]()
result = newSeq[NetworkInterface]()
res = newSeq[NetworkInterface]()
while true:
if not readNetlinkMessage(netfd, data):
break
@ -848,10 +863,11 @@ when defined(linux):
break
else:
var iface = processLink(msg)
result.add(iface)
res.add(iface)
msg = NLMSG_NEXT(msg, length)
if endflag:
break
res
proc getAddresses(netfd: SocketHandle, pid: Pid,
ifaces: var seq[NetworkInterface]) =
@ -884,26 +900,32 @@ when defined(linux):
if endflag:
break
proc getInterfaces*(): seq[NetworkInterface] =
proc getInterfaces*(): seq[NetworkInterface] {.raises: [Defect].} =
## Return list of available interfaces.
var res: seq[NetworkInterface]
var pid = posix.getpid()
var sock = createNetlinkSocket(pid)
if sock == InvalidSocketHandle:
return
result = getLinks(sock, pid)
getAddresses(sock, pid, result)
sort(result, cmp)
discard posix.close(sock)
return res
else:
res = getLinks(sock, pid)
getAddresses(sock, pid, res)
sort(res, cmp)
discard posix.close(sock)
res
proc getBestRoute*(address: TransportAddress): Route =
proc getBestRoute*(address: TransportAddress): Route {.raises: [Defect].} =
## Return best applicable OS route, which will be used for connecting to
## address ``address``.
var pid = posix.getpid()
var res = Route()
var sock = createNetlinkSocket(pid)
if sock == InvalidSocketHandle:
return
result = getRoute(sock, pid, address)
discard posix.close(sock)
res
else:
res = getRoute(sock, pid, address)
discard posix.close(sock)
res
elif defined(macosx) or defined(bsd):
import posix
@ -1018,25 +1040,25 @@ elif defined(macosx) or defined(bsd):
#include <sys/socket.h>
#include <ifaddrs.h>""".}
proc toInterfaceType(f: byte): InterfaceType {.inline.} =
proc toInterfaceType(f: byte): InterfaceType =
var ft = cast[int](f)
if (ft >= 1 and ft <= 196) or (ft == 237) or (ft == 243) or (ft == 244):
result = cast[InterfaceType](ft)
cast[InterfaceType](ft)
else:
result = IfOther
IfOther
proc toInterfaceState(f: cuint): InterfaceState {.inline.} =
proc toInterfaceState(f: cuint): InterfaceState =
if (f and IFF_RUNNING) != 0 and (f and IFF_UP) != 0:
result = StatusUp
StatusUp
else:
result = StatusDown
StatusDown
proc getInterfaces*(): seq[NetworkInterface] =
proc getInterfaces*(): seq[NetworkInterface] {.raises: [Defect].} =
## Return list of available interfaces.
var res: seq[NetworkInterface]
var ifap: ptr IfAddrs
let res = getIfAddrs(addr ifap)
if res == 0:
result = newSeq[NetworkInterface]()
let gres = getIfAddrs(addr ifap)
if gres == 0:
while not isNil(ifap):
var iface: NetworkInterface
var ifaddress: InterfaceAddress
@ -1044,27 +1066,27 @@ elif defined(macosx) or defined(bsd):
iface.name = $ifap.ifa_name
iface.flags = cast[uint64](ifap.ifa_flags)
var i = 0
while i < len(result):
if result[i].name == iface.name:
while i < len(res):
if res[i].name == iface.name:
break
inc(i)
if i == len(result):
result.add(iface)
if i == len(res):
res.add(iface)
if not isNil(ifap.ifa_addr):
let family = cast[int](ifap.ifa_addr.sa_family)
if family == AF_LINK:
var data = cast[ptr IfData](ifap.ifa_data)
var link = cast[ptr SockAddr_dl](ifap.ifa_addr)
result[i].ifIndex = cast[int](link.sdl_index)
res[i].ifIndex = cast[int](link.sdl_index)
let nlen = cast[int](link.sdl_nlen)
if nlen < len(link.sdl_data):
let minsize = min(cast[int](link.sdl_alen), len(result[i].mac))
copyMem(addr result[i].mac[0], addr link.sdl_data[nlen], minsize)
result[i].maclen = cast[int](link.sdl_alen)
result[i].ifType = toInterfaceType(data.ifi_type)
result[i].state = toInterfaceState(ifap.ifa_flags)
result[i].mtu = cast[int](data.ifi_mtu)
let minsize = min(cast[int](link.sdl_alen), len(res[i].mac))
copyMem(addr res[i].mac[0], addr link.sdl_data[nlen], minsize)
res[i].maclen = cast[int](link.sdl_alen)
res[i].ifType = toInterfaceType(data.ifi_type)
res[i].state = toInterfaceState(ifap.ifa_flags)
res[i].mtu = cast[int](data.ifi_mtu)
elif family == posix.AF_INET:
fromSAddr(cast[ptr Sockaddr_storage](ifap.ifa_addr),
Socklen(sizeof(SockAddr_in)), ifaddress.host)
@ -1083,27 +1105,31 @@ elif defined(macosx) or defined(bsd):
ifaddress.net = IpNet.init(ifaddress.host, na)
if ifaddress.host.family != AddressFamily.None:
if len(result[i].addresses) == 0:
result[i].addresses = newSeq[InterfaceAddress]()
result[i].addresses.add(ifaddress)
if len(res[i].addresses) == 0:
res[i].addresses = newSeq[InterfaceAddress]()
res[i].addresses.add(ifaddress)
ifap = ifap.ifa_next
sort(result, cmp)
sort(res, cmp)
freeIfAddrs(ifap)
res
proc sasize(data: openarray[byte]): int =
# SA_SIZE() template. Taken from FreeBSD net/route.h:1.63
if len(data) > 0:
if data[0] == 0x00'u8:
result = sizeof(uint32)
sizeof(uint32)
else:
result = 1 + (int(data[0] - 1) or (sizeof(uint32) - 1))
1 + (int(data[0] - 1) or (sizeof(uint32) - 1))
else:
0
proc getBestRoute*(address: TransportAddress): Route =
proc getBestRoute*(address: TransportAddress): Route {.raises: [Defect].} =
## Return best applicable OS route, which will be used for connecting to
## address ``address``.
var sock: cint
var msg: RtMessage
var res = Route()
var pid = posix.getpid()
if address.family notin {AddressFamily.IPv4, AddressFamily.IPv6}:
@ -1129,15 +1155,20 @@ elif defined(macosx) or defined(bsd):
msg.rtm.rtm_addrs = RTA_DST
msg.space[0] = cast[byte](salen)
msg.rtm.rtm_msglen = uint16(sizeof(RtMessage))
var res = posix.write(sock, addr msg, sizeof(RtMessage))
if res >= 0:
while true:
res = posix.read(sock, addr msg, sizeof(RtMessage))
if res >= 0 and msg.rtm.rtm_pid == pid and msg.rtm.rtm_seq == 0xCAFE:
break
if res >= 0 and msg.rtm.rtm_version == RTM_VERSION and
msg.rtm.rtm_errno == 0:
result.ifIndex = int(msg.rtm.rtm_index)
let wres = posix.write(sock, addr msg, sizeof(RtMessage))
if wres >= 0:
let rres =
block:
var pres = 0
while true:
pres = posix.read(sock, addr msg, sizeof(RtMessage))
if ((pres >= 0) and (msg.rtm.rtm_pid == pid) and
(msg.rtm.rtm_seq == 0xCAFE)) or (pres < 0):
break
pres
if (rres >= 0) and (msg.rtm.rtm_version == RTM_VERSION) and
(msg.rtm.rtm_errno == 0):
res.ifIndex = int(msg.rtm.rtm_index)
var so = 0
var eo = len(msg.space) - 1
for i in 0..<2:
@ -1146,21 +1177,22 @@ elif defined(macosx) or defined(bsd):
var saddr = cast[ptr Sockaddr_storage](addr msg.space[so])
let size = sasize(msg.space.toOpenArray(so, eo))
if mask == RTA_DST:
fromSAddr(saddr, Socklen(size), result.dest)
fromSAddr(saddr, Socklen(size), res.dest)
elif mask == RTA_GATEWAY:
fromSAddr(saddr, Socklen(size), result.gateway)
fromSAddr(saddr, Socklen(size), res.gateway)
so += size
if result.dest.isZero():
result.dest = address
if res.dest.isZero():
res.dest = address
var interfaces = getInterfaces()
for item in interfaces:
if result.ifIndex == item.ifIndex:
if res.ifIndex == item.ifIndex:
for a in item.addresses:
if a.host.family == address.family:
result.source = a.host
res.source = a.host
break
discard posix.close(sock)
res
elif defined(windows):
import winlean, dynlib
@ -1293,69 +1325,78 @@ elif defined(windows):
AddressSortOptions: uint32,
BestRoute: ptr MibIpForwardRow2,
BestSourceAddress: ptr SOCKADDR_INET): DWORD {.
gcsafe, stdcall.}
gcsafe, stdcall, raises: [].}
proc toInterfaceType(ft: uint32): InterfaceType {.inline.} =
if (ft >= 1'u32 and ft <= 196'u32) or
(ft == 237) or (ft == 243) or (ft == 244) or (ft == 259) or (ft == 281):
result = cast[InterfaceType](ft)
cast[InterfaceType](ft)
else:
result = IfOther
IfOther
proc toInterfaceState(it: cint): InterfaceState {.inline.} =
if it >= 1 and it <= 7:
result = cast[InterfaceState](it)
cast[InterfaceState](it)
else:
result = StatusUnknown
StatusUnknown
proc GetAdaptersAddresses(family: uint32, flags: uint32, reserved: pointer,
addresses: ptr IpAdapterAddressesXp,
sizeptr: ptr uint32): uint32 {.
stdcall, dynlib: "iphlpapi", importc: "GetAdaptersAddresses".}
stdcall, dynlib: "iphlpapi", importc: "GetAdaptersAddresses",
raises: [].}
proc WideCharToMultiByte(CodePage: uint32, dwFlags: uint32,
lpWideCharStr: ptr WCHAR, cchWideChar: cint,
lpMultiByteStr: ptr char, cbMultiByte: cint,
lpDefaultChar: ptr char,
lpUsedDefaultChar: ptr uint32): cint
{.stdcall, dynlib: "kernel32.dll", importc: "WideCharToMultiByte".}
{.stdcall, dynlib: "kernel32.dll", importc: "WideCharToMultiByte",
raises: [].}
proc getBestRouteXp(dwDestAddr: uint32, dwSourceAddr: uint32,
pBestRoute: ptr MibIpForwardRow): uint32 {.
stdcall, dynlib: "iphlpapi", importc: "GetBestRoute".}
stdcall, dynlib: "iphlpapi", importc: "GetBestRoute",
raises: [].}
proc `$`(bstr: ptr WCHAR): string =
var buffer: char
var count = WideCharToMultiByte(CP_UTF8, 0, bstr, -1, addr(buffer), 0,
nil, nil)
if count > 0:
result = newString(count + 8)
let res = WideCharToMultiByte(CP_UTF8, 0, bstr, -1, addr(result[0]),
count, nil, nil)
if res > 0:
result.setLen(res - 1)
var res = newString(count + 8)
let wres = WideCharToMultiByte(CP_UTF8, 0, bstr, -1, addr(res[0]),
count, nil, nil)
if wres > 0:
res.setLen(wres - 1)
else:
result.setLen(0)
res.setLen(0)
res
else:
""
proc isVista(): bool =
var ver: OSVERSIONINFO
ver.dwOSVersionInfoSize = DWORD(sizeof(ver))
let res = getVersionExW(addr(ver))
if res == 0:
result = false
false
else:
result = (ver.dwMajorVersion >= 6)
(ver.dwMajorVersion >= 6)
proc toIPv6(a: TransportAddress): TransportAddress =
## IPv4-mapped addresses are formed by:
## <80 bits of zeros> + <16 bits of ones> + <32-bit IPv4 address>.
if a.family == AddressFamily.IPv4:
result = TransportAddress(family: AddressFamily.IPv6)
result.address_v6[10] = 0xFF'u8
result.address_v6[11] = 0xFF'u8
copyMem(addr result.address_v6[12], unsafeAddr a.address_v4[0], 4)
var res = TransportAddress(family: AddressFamily.IPv6)
res.address_v6[10] = 0xFF'u8
res.address_v6[11] = 0xFF'u8
copyMem(addr res.address_v6[12], unsafeAddr a.address_v4[0], 4)
res
elif a.family == AddressFamily.IPv6:
result = a
a
else:
TransportAddress(family: AddressFamily.IPv6)
proc ipMatchPrefix(number, prefix: TransportAddress, nbits: int): bool =
var num6, prefix6: TransportAddress
@ -1377,14 +1418,15 @@ elif defined(windows):
let i = bytesCount
if (num6.address_v6[i] and mask) != (prefix6.address_v6[i] and mask):
return false
result = true
true
proc processAddress(ifitem: ptr IpAdapterAddressesXp,
ifunic: ptr IpAdapterUnicastAddressXpLh,
vista: bool): InterfaceAddress =
var res = InterfaceAddress()
var netfamily = ifunic.address.lpSockaddr.sa_family
fromSAddr(cast[ptr Sockaddr_storage](ifunic.address.lpSockaddr),
SockLen(ifunic.address.iSockaddrLength), result.host)
SockLen(ifunic.address.iSockaddrLength), res.host)
if not vista:
var prefix = ifitem.firstPrefix
var prefixLength = -1
@ -1394,34 +1436,35 @@ elif defined(windows):
fromSAddr(cast[ptr Sockaddr_storage](prefix.address.lpSockaddr),
SockLen(prefix.address.iSockaddrLength), pa)
if netfamily == prefamily:
if ipMatchPrefix(result.host, pa, cast[int](prefix.prefixLength)):
if ipMatchPrefix(res.host, pa, cast[int](prefix.prefixLength)):
prefixLength = max(prefixLength, cast[int](prefix.prefixLength))
prefix = prefix.next
if prefixLength >= 0:
result.net = IpNet.init(result.host, prefixLength)
res.net = IpNet.init(res.host, prefixLength)
else:
let prefixLength = cast[int](ifunic.onLinkPrefixLength)
if prefixLength >= 0:
result.net = IpNet.init(result.host, prefixLength)
res.net = IpNet.init(res.host, prefixLength)
res
proc getInterfaces*(): seq[NetworkInterface] =
proc getInterfaces*(): seq[NetworkInterface] {.raises: [Defect].} =
## Return list of network interfaces.
result = newSeq[NetworkInterface]()
var res = newSeq[NetworkInterface]()
var size = WorkBufferSize
var tries = 0
var buffer: seq[byte]
var res: uint32
var gres: uint32
var vista = isVista()
while true:
buffer = newSeq[byte](size)
var addresses = cast[ptr IpAdapterAddressesXp](addr buffer[0])
res = GetAdaptersAddresses(AF_UNSPEC, GAA_FLAG_INCLUDE_PREFIX, nil,
addresses, addr size)
if res == ERROR_SUCCESS:
gres = GetAdaptersAddresses(AF_UNSPEC, GAA_FLAG_INCLUDE_PREFIX, nil,
addresses, addr size)
if gres == ERROR_SUCCESS:
buffer.setLen(size)
break
elif res == ERROR_BUFFER_OVERFLOW:
elif gres == ERROR_BUFFER_OVERFLOW:
discard
else:
break
@ -1429,7 +1472,7 @@ elif defined(windows):
if tries >= MaxTries:
break
if res == ERROR_SUCCESS:
if gres == ERROR_SUCCESS:
var slider = cast[ptr IpAdapterAddressesXp](addr buffer[0])
while not isNil(slider):
var iface = NetworkInterface(
@ -1449,14 +1492,16 @@ elif defined(windows):
var ifaddr = processAddress(slider, unicast, vista)
iface.addresses.add(ifaddr)
unicast = unicast.next
result.add(iface)
res.add(iface)
slider = slider.next
sort(result, cmp)
sort(res, cmp)
res
proc getBestRoute*(address: TransportAddress): Route =
proc getBestRoute*(address: TransportAddress): Route {.raises: [Defect].} =
## Return best applicable OS route, which will be used for connecting to
## address ``address``.
var res = Route()
if isVista():
let iph = loadLib("iphlpapi.dll")
if iph != nil:
@ -1467,48 +1512,49 @@ elif defined(windows):
var destlen: Socklen
address.toSAddr(dest, destlen)
var getBestRoute2 = cast[GETBESTROUTE2](symAddr(iph, "GetBestRoute2"))
var res = getBestRoute2(addr luid, 0'u32, nil,
var gres = getBestRoute2(addr luid, 0'u32, nil,
cast[ptr SOCKADDR_INET](addr dest),
0'u32,
addr bestRoute,
cast[ptr SOCKADDR_INET](addr src))
if res == 0:
if gres == 0:
if src.ss_family == winlean.AF_INET:
fromSAddr(addr src, Socklen(sizeof(Sockaddr_in)), result.source)
fromSAddr(addr src, Socklen(sizeof(Sockaddr_in)), res.source)
elif src.ss_family == winlean.AF_INET6:
fromSAddr(addr src, Socklen(sizeof(Sockaddr_in6)), result.source)
fromSAddr(addr src, Socklen(sizeof(Sockaddr_in6)), res.source)
if bestRoute.nextHop.si_family == winlean.AF_INET:
fromSAddr(cast[ptr Sockaddr_storage](addr bestRoute.nextHop),
Socklen(sizeof(Sockaddr_in)), result.gateway)
Socklen(sizeof(Sockaddr_in)), res.gateway)
elif bestRoute.nextHop.si_family == winlean.AF_INET6:
fromSAddr(cast[ptr Sockaddr_storage](addr bestRoute.nextHop),
Socklen(sizeof(Sockaddr_in6)), result.gateway)
if result.gateway.isZero():
result.gateway = empty
result.dest = address
result.ifIndex = int(bestRoute.interfaceIndex)
result.metric = int(bestRoute.metric)
Socklen(sizeof(Sockaddr_in6)), res.gateway)
if res.gateway.isZero():
res.gateway = empty
res.dest = address
res.ifIndex = int(bestRoute.interfaceIndex)
res.metric = int(bestRoute.metric)
else:
if address.family == AddressFamily.IPv4:
var bestRoute: MibIpForwardRow
var dest: uint32
copyMem(addr dest, unsafeAddr address.address_v4[0], 4)
let res = getBestRouteXp(dest, 0'u32, addr bestRoute)
if res == 0:
let gres = getBestRouteXp(dest, 0'u32, addr bestRoute)
if gres == 0:
var interfaces = getInterfaces()
result.dest = address
res.dest = address
if bestRoute.dwForwardNextHop != 0'u32:
result.gateway = TransportAddress(family: AddressFamily.IPv4)
copyMem(addr result.gateway.address_v4[0],
res.gateway = TransportAddress(family: AddressFamily.IPv4)
copyMem(addr res.gateway.address_v4[0],
addr bestRoute.dwForwardNextHop, 4)
result.metric = int(bestRoute.dwForwardMetric1)
result.ifIndex = int(bestRoute.dwForwardIfIndex)
res.metric = int(bestRoute.dwForwardMetric1)
res.ifIndex = int(bestRoute.dwForwardIfIndex)
for item in interfaces:
if item.ifIndex == int(bestRoute.dwForwardIfIndex):
for a in item.addresses:
if a.host.family == AddressFamily.IPv4:
result.source = a.host
res.source = a.host
break
res
else:
{.fatal: "Sorry, your OS is currently not supported!".}