mirror of https://github.com/status-im/nim-eth.git
75 lines
2.3 KiB
Nim
75 lines
2.3 KiB
Nim
# nim-eth
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# Copyright (c) 2020-2024 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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{.push raises: [].}
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import
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std/[tables, hashes, net],
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stew/results, chronos, chronicles
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export net.IpAddress
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type
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IpLimits* = object
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limit*: uint
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ips: Table[IpAddress, uint]
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func hash*(ip: IpAddress): Hash =
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case ip.family
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of IpAddressFamily.IPv6: hash(ip.address_v6)
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of IpAddressFamily.IPv4: hash(ip.address_v4)
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func inc*(ipLimits: var IpLimits, ip: IpAddress): bool =
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let val = ipLimits.ips.getOrDefault(ip, 0)
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if val < ipLimits.limit:
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ipLimits.ips[ip] = val + 1
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true
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else:
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false
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func dec*(ipLimits: var IpLimits, ip: IpAddress) =
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let val = ipLimits.ips.getOrDefault(ip, 0)
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if val == 1:
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ipLimits.ips.del(ip)
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elif val > 1:
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ipLimits.ips[ip] = val - 1
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func isGlobalUnicast*(address: TransportAddress): bool =
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if address.isGlobal() and address.isUnicast():
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true
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else:
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false
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func isGlobalUnicast*(address: IpAddress): bool =
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let a = initTAddress(address, Port(0))
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a.isGlobalUnicast()
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proc getRouteIpv4*(): Result[IpAddress, cstring] =
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# Avoiding Exception with initTAddress and can't make it work with static.
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# Note: `publicAddress` is only used an "example" IP to find the best route,
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# no data is send over the network to this IP!
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let
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publicAddress = TransportAddress(family: AddressFamily.IPv4,
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address_v4: [1'u8, 1, 1, 1], port: Port(0))
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route = getBestRoute(publicAddress)
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if route.source.isUnspecified():
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err("No best ipv4 route found")
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else:
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let ip = try: route.source.address()
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except ValueError as e:
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# This should not occur really.
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error "Address conversion error", exception = e.name, msg = e.msg
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return err("Invalid IP address")
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ok(ip)
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func ipv4*(address: array[4, byte]): IpAddress =
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IpAddress(family: IPv4, address_v4: address)
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func ipv6*(address: array[16, byte]): IpAddress =
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IpAddress(family: IPv6, address_v6: address)
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