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feat: implement route network controllers
Route handling is very similar to addresses: * `RouteStatus` describes kernel routing table state, `RouteStatusController` reflects kernel state into resources * `RouteSpec` defines routes to be configured * `RouteConfigController` creates `RouteSpec`s based on cmdline and machine configuration * `RouteMergeController` merges different configuration layers into the final representation * `RouteSpecController` applies the specs to the kernel routing table Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>
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127 changes: 127 additions & 0 deletions
127
internal/app/machined/pkg/controllers/network/cmdline.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
|
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| package network | ||
|
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| import ( | ||
| "fmt" | ||
| "net" | ||
| "sort" | ||
| "strings" | ||
|
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| "github.com/talos-systems/go-procfs/procfs" | ||
| "inet.af/netaddr" | ||
| ) | ||
|
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| // CmdlineNetworking contains parsed cmdline networking settings. | ||
| type CmdlineNetworking struct { | ||
| DHCP bool | ||
| Address netaddr.IPPrefix | ||
| Gateway netaddr.IP | ||
| Hostname string | ||
| LinkName string | ||
| DNSAddresses []netaddr.IP | ||
| NTPAddresses []netaddr.IP | ||
| } | ||
|
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| // ParseCmdlineNetwork parses `ip=` kernel cmdline argument producing all the available configuration options. | ||
| // | ||
| //nolint:gocyclo,cyclop | ||
| func ParseCmdlineNetwork(cmdline *procfs.Cmdline) (CmdlineNetworking, error) { | ||
| var ( | ||
| settings CmdlineNetworking | ||
| err error | ||
| ) | ||
|
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| ipSettings := cmdline.Get("ip").First() | ||
| if ipSettings == nil { | ||
| return settings, nil | ||
| } | ||
|
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| // https://www.kernel.org/doc/Documentation/filesystems/nfs/nfsroot.txt | ||
| // ip=<client-ip>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>:<dns0-ip>:<dns1-ip>:<ntp0-ip> | ||
| fields := strings.Split(*ipSettings, ":") | ||
|
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| // If dhcp is specified, we'll handle it as a normal discovered | ||
| // interface | ||
| if len(fields) == 1 && fields[0] == "dhcp" { | ||
| settings.DHCP = true | ||
| } | ||
|
|
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| if !settings.DHCP { | ||
| for i := range fields { | ||
| if fields[i] == "" { | ||
| continue | ||
| } | ||
|
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| switch i { | ||
| case 0: | ||
| settings.Address.IP, err = netaddr.ParseIP(fields[0]) | ||
| if err != nil { | ||
| return settings, fmt.Errorf("cmdline address parse failure: %s", err) | ||
| } | ||
|
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| // default is to have complete address masked | ||
| settings.Address.Bits = settings.Address.IP.BitLen() | ||
| case 2: | ||
| settings.Gateway, err = netaddr.ParseIP(fields[2]) | ||
| if err != nil { | ||
| return settings, fmt.Errorf("cmdline gateway parse failure: %s", err) | ||
| } | ||
| case 3: | ||
| var netmask netaddr.IP | ||
|
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| netmask, err = netaddr.ParseIP(fields[3]) | ||
| if err != nil { | ||
| return settings, fmt.Errorf("cmdline netmask parse failure: %s", err) | ||
| } | ||
|
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| ones, _ := net.IPMask(netmask.IPAddr().IP).Size() | ||
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| settings.Address.Bits = uint8(ones) | ||
| case 4: | ||
| settings.Hostname = fields[4] | ||
| case 5: | ||
| settings.LinkName = fields[5] | ||
| case 7, 8: | ||
| var dnsIP netaddr.IP | ||
|
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| dnsIP, err = netaddr.ParseIP(fields[i]) | ||
| if err != nil { | ||
| return settings, fmt.Errorf("error parsing DNS IP: %w", err) | ||
| } | ||
|
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| settings.DNSAddresses = append(settings.DNSAddresses, dnsIP) | ||
| case 9: | ||
| var ntpIP netaddr.IP | ||
|
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| ntpIP, err = netaddr.ParseIP(fields[i]) | ||
| if err != nil { | ||
| return settings, fmt.Errorf("error parsing DNS IP: %w", err) | ||
| } | ||
|
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| settings.NTPAddresses = append(settings.NTPAddresses, ntpIP) | ||
| } | ||
| } | ||
| } | ||
|
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| // if interface name is not set, pick the first non-loopback interface | ||
| if settings.LinkName == "" { | ||
| ifaces, _ := net.Interfaces() //nolint:errcheck // ignoring error here as ifaces will be empty | ||
|
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| sort.Slice(ifaces, func(i, j int) bool { return ifaces[i].Name < ifaces[j].Name }) | ||
|
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| for _, iface := range ifaces { | ||
| if iface.Flags&net.FlagLoopback != 0 { | ||
| continue | ||
| } | ||
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| settings.LinkName = iface.Name | ||
|
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| break | ||
| } | ||
| } | ||
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| return settings, nil | ||
| } |
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