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Implement new sys/unix package
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flysand7
@@ -21,120 +21,124 @@ package net
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TODO: When we have raw sockets, split off into its own file for Linux so we can use the NETLINK protocol and bypass libc.
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*/
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import "core:os"
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import "core:strings"
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//import "core:strings"
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// TODO(flysand): regression
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// NOTE(flysand): https://man7.org/linux/man-pages/man7/netlink.7.html
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// apparently musl libc uses this to enumerate network interfaces
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@(private)
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_enumerate_interfaces :: proc(allocator := context.allocator) -> (interfaces: []Network_Interface, err: Network_Error) {
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context.allocator = allocator
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head: ^os.ifaddrs
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// head: ^os.ifaddrs
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if res := os._getifaddrs(&head); res < 0 {
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return {}, .Unable_To_Enumerate_Network_Interfaces
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}
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// if res := os._getifaddrs(&head); res < 0 {
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// return {}, .Unable_To_Enumerate_Network_Interfaces
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// }
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/*
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Unlike Windows, *nix regrettably doesn't return all it knows about an interface in one big struct.
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We're going to have to iterate over a list and coalesce information as we go.
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*/
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ifaces: map[string]^Network_Interface
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defer delete(ifaces)
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// /*
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// Unlike Windows, *nix regrettably doesn't return all it knows about an interface in one big struct.
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// We're going to have to iterate over a list and coalesce information as we go.
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// */
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// ifaces: map[string]^Network_Interface
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// defer delete(ifaces)
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for ifaddr := head; ifaddr != nil; ifaddr = ifaddr.next {
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adapter_name := string(ifaddr.name)
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// for ifaddr := head; ifaddr != nil; ifaddr = ifaddr.next {
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// adapter_name := string(ifaddr.name)
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/*
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Check if we have seen this interface name before so we can reuse the `Network_Interface`.
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Else, create a new one.
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*/
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if adapter_name not_in ifaces {
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ifaces[adapter_name] = new(Network_Interface)
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ifaces[adapter_name].adapter_name = strings.clone(adapter_name)
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}
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iface := ifaces[adapter_name]
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// /*
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// Check if we have seen this interface name before so we can reuse the `Network_Interface`.
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// Else, create a new one.
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// */
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// if adapter_name not_in ifaces {
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// ifaces[adapter_name] = new(Network_Interface)
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// ifaces[adapter_name].adapter_name = strings.clone(adapter_name)
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// }
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// iface := ifaces[adapter_name]
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address: Address
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netmask: Netmask
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// address: Address
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// netmask: Netmask
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if ifaddr.address != nil {
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switch int(ifaddr.address.sa_family) {
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case os.AF_INET, os.AF_INET6:
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address = _sockaddr_basic_to_endpoint(ifaddr.address).address
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// if ifaddr.address != nil {
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// switch int(ifaddr.address.sa_family) {
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// case os.AF_INET, os.AF_INET6:
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// address = _sockaddr_basic_to_endpoint(ifaddr.address).address
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case os.AF_PACKET:
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/*
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For some obscure reason the 64-bit `getifaddrs` call returns a pointer to a
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32-bit `RTNL_LINK_STATS` structure, which of course means that tx/rx byte count
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is truncated beyond usefulness.
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// case os.AF_PACKET:
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// /*
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// For some obscure reason the 64-bit `getifaddrs` call returns a pointer to a
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// 32-bit `RTNL_LINK_STATS` structure, which of course means that tx/rx byte count
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// is truncated beyond usefulness.
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We're not going to retrieve stats now. Instead this serves as a reminder to use
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the NETLINK protocol for this purpose.
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// We're not going to retrieve stats now. Instead this serves as a reminder to use
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// the NETLINK protocol for this purpose.
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But in case you were curious:
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stats := transmute(^os.rtnl_link_stats)ifaddr.data
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fmt.println(stats)
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*/
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case:
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}
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}
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// But in case you were curious:
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// stats := transmute(^os.rtnl_link_stats)ifaddr.data
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// fmt.println(stats)
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// */
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// case:
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// }
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// }
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if ifaddr.netmask != nil {
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switch int(ifaddr.netmask.sa_family) {
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case os.AF_INET, os.AF_INET6:
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netmask = Netmask(_sockaddr_basic_to_endpoint(ifaddr.netmask).address)
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case:
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}
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}
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// if ifaddr.netmask != nil {
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// switch int(ifaddr.netmask.sa_family) {
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// case os.AF_INET, os.AF_INET6:
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// netmask = Netmask(_sockaddr_basic_to_endpoint(ifaddr.netmask).address)
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// case:
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// }
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// }
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if ifaddr.broadcast_or_dest != nil && .BROADCAST in ifaddr.flags {
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switch int(ifaddr.broadcast_or_dest.sa_family) {
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case os.AF_INET, os.AF_INET6:
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broadcast := _sockaddr_basic_to_endpoint(ifaddr.broadcast_or_dest).address
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append(&iface.multicast, broadcast)
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case:
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}
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}
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// if ifaddr.broadcast_or_dest != nil && .BROADCAST in ifaddr.flags {
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// switch int(ifaddr.broadcast_or_dest.sa_family) {
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// case os.AF_INET, os.AF_INET6:
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// broadcast := _sockaddr_basic_to_endpoint(ifaddr.broadcast_or_dest).address
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// append(&iface.multicast, broadcast)
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// case:
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// }
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// }
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if address != nil {
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lease := Lease{
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address = address,
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netmask = netmask,
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}
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append(&iface.unicast, lease)
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}
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// if address != nil {
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// lease := Lease{
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// address = address,
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// netmask = netmask,
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// }
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// append(&iface.unicast, lease)
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// }
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/*
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TODO: Refine this based on the type of adapter.
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*/
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state := Link_State{}
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// /*
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// TODO: Refine this based on the type of adapter.
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// */
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// state := Link_State{}
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if .UP in ifaddr.flags {
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state |= {.Up}
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}
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// if .UP in ifaddr.flags {
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// state |= {.Up}
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// }
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if .DORMANT in ifaddr.flags {
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state |= {.Dormant}
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}
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// if .DORMANT in ifaddr.flags {
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// state |= {.Dormant}
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// }
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if .LOOPBACK in ifaddr.flags {
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state |= {.Loopback}
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}
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iface.link.state = state
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}
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// if .LOOPBACK in ifaddr.flags {
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// state |= {.Loopback}
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// }
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// iface.link.state = state
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// }
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/*
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Free the OS structures.
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*/
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os._freeifaddrs(head)
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// /*
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// Free the OS structures.
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// */
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// os._freeifaddrs(head)
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/*
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Turn the map into a slice to return.
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*/
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_interfaces := make([dynamic]Network_Interface, 0, allocator)
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for _, iface in ifaces {
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append(&_interfaces, iface^)
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free(iface)
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}
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return _interfaces[:], {}
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// /*
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// Turn the map into a slice to return.
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// */
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// _interfaces := make([dynamic]Network_Interface, 0, allocator)
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// for _, iface in ifaces {
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// append(&_interfaces, iface^)
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// free(iface)
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// }
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// return _interfaces[:], {}
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return nil, {}
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}
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