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Error rewrites (#43)

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* pcap: reuse Frame memory

* slog: reduce heap allocations of addresses; also prevent heap alloc of dhcp options in pcap

* dns: heapless improvement; add StackAsync buffer for more heapless operation; start thinking of errors

* errors: begin standardise errors in lneto

* errors: finish standardization of errors

* fix merge issues

* add more lneto errors to rest of package

* format errors.go
This commit is contained in:
Pat Whittingslow
2026-02-28 20:18:27 +01:00
committed by GitHub
parent 3d0bc93cbe
commit fa5ba918bb
38 changed files with 272 additions and 322 deletions
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x/xnet/stack-async.go
+8 -10
View File
@@ -99,13 +99,13 @@ func (s *StackAsync) Reset(cfg StackConfig) error {
addr := cfg.StaticAddress
s.prng = uint32(cfg.RandSeed)
if s.prng == 0 {
return errors.New("zero random seed")
return lneto.ErrInvalidConfig
}
s.hostname = cfg.Hostname
if !addr.IsValid() {
addr = netip.AddrFrom4([4]byte{}) // If static not set DHCP will be performed and address will be zero.
} else if addr.Is6() {
return errors.New("IPv6 unsupported as of yet")
return lneto.ErrUnsupported
}
const linkNodes = 2 // ARP and IP nodes
ecfg := internet.StackEthernetConfig{
@@ -171,13 +171,11 @@ func (s *StackAsync) Reset(cfg StackConfig) error {
return nil
}
var errInvalidIPAddr = errors.New("invaldi IP address")
func (s *StackAsync) resetARP() error {
mac := s.link.HardwareAddr6()
addr := s.ip.Addr()
if !addr.IsValid() {
return errInvalidIPAddr
return lneto.ErrInvalidAddr
}
proto := ethernet.TypeIPv4
if addr.Is6() {
@@ -384,7 +382,7 @@ func (s *StackAsync) ResultLookupIP(host string) ([]netip.Addr, bool, error) {
} else if len(data) == 16 {
addrs = append(addrs, netip.AddrFrom16([16]byte(data)))
} else {
err = errors.New("bogus IP")
err = lneto.ErrInvalidAddr
}
}
if err == nil && len(addrs) == 0 {
@@ -441,7 +439,7 @@ func (s *StackAsync) StartResolveHardwareAddress6(ip netip.Addr) error {
s.mu.Lock()
defer s.mu.Unlock()
if !ip.Is4() {
return errors.New("unsupported or invalid IP address")
return lneto.ErrUnsupported
}
addr := ip.As4()
return s.arp.StartQuery(nil, addr[:])
@@ -452,7 +450,7 @@ func (s *StackAsync) ResultResolveHardwareAddress6(ip netip.Addr) (hw [6]byte, e
s.mu.Lock()
defer s.mu.Unlock()
if !ip.Is4() {
return hw, errors.New("unsupported or invalid IP address")
return hw, lneto.ErrUnsupported
}
addr := ip.As4()
hwslice, err := s.arp.QueryResult(addr[:])
@@ -469,7 +467,7 @@ func (s *StackAsync) DiscardResolveHardwareAddress6(ip netip.Addr) error {
s.mu.Lock()
defer s.mu.Unlock()
if !ip.Is4() {
return errors.New("unsupported or invalid IP address")
return lneto.ErrUnsupported
}
addr := ip.As4()
return s.arp.DiscardQuery(addr[:])
@@ -526,7 +524,7 @@ func (stack *StackAsync) AssimilateDHCPResults(results *DHCPResults) error {
}
if len(results.DNSServers) > 0 {
if !results.DNSServers[0].IsValid() || !results.DNSServers[0].Is4() {
return errors.New("bad DNS server address, IPv6 or invalid")
return lneto.ErrInvalidAddr
}
stack.dnssv = results.DNSServers[0]
}