diff options
Diffstat (limited to 'llgo/third_party/gofrontend/libgo/go/net/dnsconfig_unix.go')
| -rw-r--r-- | llgo/third_party/gofrontend/libgo/go/net/dnsconfig_unix.go | 54 |
1 files changed, 39 insertions, 15 deletions
diff --git a/llgo/third_party/gofrontend/libgo/go/net/dnsconfig_unix.go b/llgo/third_party/gofrontend/libgo/go/net/dnsconfig_unix.go index 66ab7c4dd30..6073fdb6d83 100644 --- a/llgo/third_party/gofrontend/libgo/go/net/dnsconfig_unix.go +++ b/llgo/third_party/gofrontend/libgo/go/net/dnsconfig_unix.go @@ -8,30 +8,41 @@ package net +var defaultNS = []string{"127.0.0.1", "::1"} + type dnsConfig struct { - servers []string // servers to use - search []string // suffixes to append to local name - ndots int // number of dots in name to trigger absolute lookup - timeout int // seconds before giving up on packet - attempts int // lost packets before giving up on server - rotate bool // round robin among servers + servers []string // servers to use + search []string // suffixes to append to local name + ndots int // number of dots in name to trigger absolute lookup + timeout int // seconds before giving up on packet + attempts int // lost packets before giving up on server + rotate bool // round robin among servers + unknownOpt bool // anything unknown was encountered + lookup []string // OpenBSD top-level database "lookup" order + err error // any error that occurs during open of resolv.conf } // See resolv.conf(5) on a Linux machine. // TODO(rsc): Supposed to call uname() and chop the beginning // of the host name to get the default search domain. -func dnsReadConfig(filename string) (*dnsConfig, error) { - file, err := open(filename) - if err != nil { - return nil, &DNSConfigError{err} - } - defer file.close() +func dnsReadConfig(filename string) *dnsConfig { conf := &dnsConfig{ ndots: 1, timeout: 5, attempts: 2, } + file, err := open(filename) + if err != nil { + conf.servers = defaultNS + conf.err = err + return conf + } + defer file.close() for line, ok := file.readLine(); ok; line, ok = file.readLine() { + if len(line) > 0 && (line[0] == ';' || line[0] == '#') { + // comment. + continue + } f := getFields(line) if len(f) < 1 { continue @@ -61,8 +72,7 @@ func dnsReadConfig(filename string) (*dnsConfig, error) { } case "options": // magic options - for i := 1; i < len(f); i++ { - s := f[i] + for _, s := range f[1:] { switch { case hasPrefix(s, "ndots:"): n, _, _ := dtoi(s, 6) @@ -84,11 +94,25 @@ func dnsReadConfig(filename string) (*dnsConfig, error) { conf.attempts = n case s == "rotate": conf.rotate = true + default: + conf.unknownOpt = true } } + + case "lookup": + // OpenBSD option: + // http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man5/resolv.conf.5 + // "the legal space-separated values are: bind, file, yp" + conf.lookup = f[1:] + + default: + conf.unknownOpt = true } } - return conf, nil + if len(conf.servers) == 0 { + conf.servers = defaultNS + } + return conf } func hasPrefix(s, prefix string) bool { |
