diff options
Diffstat (limited to 'src/share/classes/sun/net/util/IPAddressUtil.java')
| -rw-r--r-- | src/share/classes/sun/net/util/IPAddressUtil.java | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/src/share/classes/sun/net/util/IPAddressUtil.java b/src/share/classes/sun/net/util/IPAddressUtil.java index 6aa98c8f8d..2bcd2c0781 100644 --- a/src/share/classes/sun/net/util/IPAddressUtil.java +++ b/src/share/classes/sun/net/util/IPAddressUtil.java @@ -25,6 +25,9 @@ package sun.net.util; +import java.net.URL; +import java.util.Arrays; + public class IPAddressUtil { private final static int INADDR4SZ = 4; private final static int INADDR16SZ = 16; @@ -287,4 +290,182 @@ public class IPAddressUtil { } return false; } + + // See java.net.URI for more details on how to generate these + // masks. + // + // square brackets + private static final long L_IPV6_DELIMS = 0x0L; // "[]" + private static final long H_IPV6_DELIMS = 0x28000000L; // "[]" + // RFC 3986 gen-delims + private static final long L_GEN_DELIMS = 0x8400800800000000L; // ":/?#[]@" + private static final long H_GEN_DELIMS = 0x28000001L; // ":/?#[]@" + // These gen-delims can appear in authority + private static final long L_AUTH_DELIMS = 0x400000000000000L; // "@[]:" + private static final long H_AUTH_DELIMS = 0x28000001L; // "@[]:" + // colon is allowed in userinfo + private static final long L_COLON = 0x400000000000000L; // ":" + private static final long H_COLON = 0x0L; // ":" + // slash should be encoded in authority + private static final long L_SLASH = 0x800000000000L; // "/" + private static final long H_SLASH = 0x0L; // "/" + // backslash should always be encoded + private static final long L_BACKSLASH = 0x0L; // "\" + private static final long H_BACKSLASH = 0x10000000L; // "\" + // ASCII chars 0-31 + 127 - various controls + CRLF + TAB + private static final long L_NON_PRINTABLE = 0xffffffffL; + private static final long H_NON_PRINTABLE = 0x8000000000000000L; + // All of the above + private static final long L_EXCLUDE = 0x84008008ffffffffL; + private static final long H_EXCLUDE = 0x8000000038000001L; + + private static final char[] OTHERS = { + 8263,8264,8265,8448,8449,8453,8454,10868, + 65109,65110,65119,65131,65283,65295,65306,65311,65312 + }; + + // Tell whether the given character is found by the given mask pair + public static boolean match(char c, long lowMask, long highMask) { + if (c < 64) + return ((1L << c) & lowMask) != 0; + if (c < 128) + return ((1L << (c - 64)) & highMask) != 0; + return false; // other non ASCII characters are not filtered + } + + // returns -1 if the string doesn't contain any characters + // from the mask, the index of the first such character found + // otherwise. + public static int scan(String s, long lowMask, long highMask) { + int i = -1, len; + if (s == null || (len = s.length()) == 0) return -1; + boolean match = false; + while (++i < len && !(match = match(s.charAt(i), lowMask, highMask))); + if (match) return i; + return -1; + } + + public static int scan(String s, long lowMask, long highMask, char[] others) { + int i = -1, len; + if (s == null || (len = s.length()) == 0) return -1; + boolean match = false; + char c, c0 = others[0]; + while (++i < len && !(match = match((c=s.charAt(i)), lowMask, highMask))) { + if (c >= c0 && (Arrays.binarySearch(others, c) > -1)) { + match = true; break; + } + } + if (match) return i; + + return -1; + } + + private static String describeChar(char c) { + if (c < 32 || c == 127) { + if (c == '\n') return "LF"; + if (c == '\r') return "CR"; + return "control char (code=" + (int)c + ")"; + } + if (c == '\\') return "'\\'"; + return "'" + c + "'"; + } + + private static String checkUserInfo(String str) { + // colon is permitted in user info + int index = scan(str, L_EXCLUDE & ~L_COLON, + H_EXCLUDE & ~H_COLON); + if (index >= 0) { + return "Illegal character found in user-info: " + + describeChar(str.charAt(index)); + } + return null; + } + + private static String checkHost(String str) { + int index; + if (str.startsWith("[") && str.endsWith("]")) { + str = str.substring(1, str.length() - 1); + if (isIPv6LiteralAddress(str)) { + index = str.indexOf('%'); + if (index >= 0) { + index = scan(str = str.substring(index), + L_NON_PRINTABLE | L_IPV6_DELIMS, + H_NON_PRINTABLE | H_IPV6_DELIMS); + if (index >= 0) { + return "Illegal character found in IPv6 scoped address: " + + describeChar(str.charAt(index)); + } + } + return null; + } + return "Unrecognized IPv6 address format"; + } else { + index = scan(str, L_EXCLUDE, H_EXCLUDE); + if (index >= 0) { + return "Illegal character found in host: " + + describeChar(str.charAt(index)); + } + } + return null; + } + + private static String checkAuth(String str) { + int index = scan(str, + L_EXCLUDE & ~L_AUTH_DELIMS, + H_EXCLUDE & ~H_AUTH_DELIMS); + if (index >= 0) { + return "Illegal character found in authority: " + + describeChar(str.charAt(index)); + } + return null; + } + + // check authority of hierarchical URL. Appropriate for + // HTTP-like protocol handlers + public static String checkAuthority(URL url) { + String s, u, h; + if (url == null) return null; + if ((s = checkUserInfo(u = url.getUserInfo())) != null) { + return s; + } + if ((s = checkHost(h = url.getHost())) != null) { + return s; + } + if (h == null && u == null) { + return checkAuth(url.getAuthority()); + } + return null; + } + + // minimal syntax checks - deeper check may be performed + // by the appropriate protocol handler + public static String checkExternalForm(URL url) { + String s; + if (url == null) return null; + int index = scan(s = url.getUserInfo(), + L_NON_PRINTABLE | L_SLASH, + H_NON_PRINTABLE | H_SLASH); + if (index >= 0) { + return "Illegal character found in authority: " + + describeChar(s.charAt(index)); + } + if ((s = checkHostString(url.getHost())) != null) { + return s; + } + return null; + } + + public static String checkHostString(String host) { + if (host == null) return null; + int index = scan(host, + L_NON_PRINTABLE | L_SLASH, + H_NON_PRINTABLE | H_SLASH, + OTHERS); + if (index >= 0) { + return "Illegal character found in host: " + + describeChar(host.charAt(index)); + } + return null; + } + } |