diff options
Diffstat (limited to 'libgo/go/net/ip.go')
| -rw-r--r-- | libgo/go/net/ip.go | 95 |
1 files changed, 42 insertions, 53 deletions
diff --git a/libgo/go/net/ip.go b/libgo/go/net/ip.go index d588e3a..0e42da2 100644 --- a/libgo/go/net/ip.go +++ b/libgo/go/net/ip.go @@ -36,7 +36,6 @@ type IPMask []byte type IPNet struct { IP IP // network number Mask IPMask // network mask - Zone string // IPv6 scoped addressing zone } // IPv4 returns the IP address (in 16-byte form) of the @@ -223,7 +222,6 @@ func (ip IP) DefaultMask() IPMask { default: return classCMask } - return nil // not reached } func allFF(b []byte) bool { @@ -433,6 +431,9 @@ func (n *IPNet) Contains(ip IP) bool { return true } +// Network returns the address's network name, "ip+net". +func (n *IPNet) Network() string { return "ip+net" } + // String returns the CIDR notation of n like "192.168.100.1/24" // or "2001:DB8::/48" as defined in RFC 4632 and RFC 4291. // If the mask is not in the canonical form, it returns the @@ -451,9 +452,6 @@ func (n *IPNet) String() string { return nn.String() + "/" + itod(uint(l)) } -// Network returns the address's network name, "ip+net". -func (n *IPNet) Network() string { return "ip+net" } - // Parse IPv4 address (d.d.d.d). func parseIPv4(s string) IP { var p [IPv4len]byte @@ -485,26 +483,26 @@ func parseIPv4(s string) IP { return IPv4(p[0], p[1], p[2], p[3]) } -// Parse IPv6 address. Many forms. -// The basic form is a sequence of eight colon-separated -// 16-bit hex numbers separated by colons, -// as in 0123:4567:89ab:cdef:0123:4567:89ab:cdef. -// Two exceptions: -// * A run of zeros can be replaced with "::". -// * The last 32 bits can be in IPv4 form. -// Thus, ::ffff:1.2.3.4 is the IPv4 address 1.2.3.4. -func parseIPv6(s string) IP { - p := make(IP, IPv6len) +// parseIPv6 parses s as a literal IPv6 address described in RFC 4291 +// and RFC 5952. It can also parse a literal scoped IPv6 address with +// zone identifier which is described in RFC 4007 when zoneAllowed is +// true. +func parseIPv6(s string, zoneAllowed bool) (ip IP, zone string) { + ip = make(IP, IPv6len) ellipsis := -1 // position of ellipsis in p i := 0 // index in string s + if zoneAllowed { + s, zone = splitHostZone(s) + } + // Might have leading ellipsis if len(s) >= 2 && s[0] == ':' && s[1] == ':' { ellipsis = 0 i = 2 // Might be only ellipsis if i == len(s) { - return p + return ip, zone } } @@ -514,35 +512,35 @@ func parseIPv6(s string) IP { // Hex number. n, i1, ok := xtoi(s, i) if !ok || n > 0xFFFF { - return nil + return nil, zone } // If followed by dot, might be in trailing IPv4. if i1 < len(s) && s[i1] == '.' { if ellipsis < 0 && j != IPv6len-IPv4len { // Not the right place. - return nil + return nil, zone } if j+IPv4len > IPv6len { // Not enough room. - return nil + return nil, zone } - p4 := parseIPv4(s[i:]) - if p4 == nil { - return nil + ip4 := parseIPv4(s[i:]) + if ip4 == nil { + return nil, zone } - p[j] = p4[12] - p[j+1] = p4[13] - p[j+2] = p4[14] - p[j+3] = p4[15] + ip[j] = ip4[12] + ip[j+1] = ip4[13] + ip[j+2] = ip4[14] + ip[j+3] = ip4[15] i = len(s) j += IPv4len break } // Save this 16-bit chunk. - p[j] = byte(n >> 8) - p[j+1] = byte(n) + ip[j] = byte(n >> 8) + ip[j+1] = byte(n) j += 2 // Stop at end of string. @@ -553,14 +551,14 @@ func parseIPv6(s string) IP { // Otherwise must be followed by colon and more. if s[i] != ':' || i+1 == len(s) { - return nil + return nil, zone } i++ // Look for ellipsis. if s[i] == ':' { if ellipsis >= 0 { // already have one - return nil + return nil, zone } ellipsis = j if i++; i == len(s) { // can be at end @@ -571,23 +569,23 @@ func parseIPv6(s string) IP { // Must have used entire string. if i != len(s) { - return nil + return nil, zone } // If didn't parse enough, expand ellipsis. if j < IPv6len { if ellipsis < 0 { - return nil + return nil, zone } n := IPv6len - j for k := j - 1; k >= ellipsis; k-- { - p[k+n] = p[k] + ip[k+n] = ip[k] } for k := ellipsis + n - 1; k >= ellipsis; k-- { - p[k] = 0 + ip[k] = 0 } } - return p + return ip, zone } // A ParseError represents a malformed text string and the type of string that was expected. @@ -600,26 +598,17 @@ func (e *ParseError) Error() string { return "invalid " + e.Type + ": " + e.Text } -func parseIP(s string) IP { - if p := parseIPv4(s); p != nil { - return p - } - if p := parseIPv6(s); p != nil { - return p - } - return nil -} - // ParseIP parses s as an IP address, returning the result. // The string s can be in dotted decimal ("74.125.19.99") // or IPv6 ("2001:4860:0:2001::68") form. // If s is not a valid textual representation of an IP address, // ParseIP returns nil. func ParseIP(s string) IP { - if p := parseIPv4(s); p != nil { - return p + if ip := parseIPv4(s); ip != nil { + return ip } - return parseIPv6(s) + ip, _ := parseIPv6(s, false) + return ip } // ParseCIDR parses s as a CIDR notation IP address and mask, @@ -634,15 +623,15 @@ func ParseCIDR(s string) (IP, *IPNet, error) { if i < 0 { return nil, nil, &ParseError{"CIDR address", s} } - ipstr, maskstr := s[:i], s[i+1:] + addr, mask := s[:i], s[i+1:] iplen := IPv4len - ip := parseIPv4(ipstr) + ip := parseIPv4(addr) if ip == nil { iplen = IPv6len - ip = parseIPv6(ipstr) + ip, _ = parseIPv6(addr, false) } - n, i, ok := dtoi(maskstr, 0) - if ip == nil || !ok || i != len(maskstr) || n < 0 || n > 8*iplen { + n, i, ok := dtoi(mask, 0) + if ip == nil || !ok || i != len(mask) || n < 0 || n > 8*iplen { return nil, nil, &ParseError{"CIDR address", s} } m := CIDRMask(n, 8*iplen) |