Cross Reference: /frameworks/base/services/net/java/android/net/util/IpUtils.java

Lines Matching defs:buf
46     private static int checksum(ByteBuffer buf, int seed, int start, int end) {
48         final int bufPosition = buf.position();
52         buf.position(start);
53         ShortBuffer shortBuf = buf.asShortBuffer();
56         buf.position(bufPosition);
66             short b = buf.get(start);
83             ByteBuffer buf, int headerOffset, int protocol, int transportLen) {
85         partial += intAbs(buf.getShort(headerOffset + 12));
86         partial += intAbs(buf.getShort(headerOffset + 14));
87         partial += intAbs(buf.getShort(headerOffset + 16));
88         partial += intAbs(buf.getShort(headerOffset + 18));
93             ByteBuffer buf, int headerOffset, int protocol, int transportLen) {
96             partial += intAbs(buf.getShort(headerOffset + offset));
101     private static byte ipversion(ByteBuffer buf, int headerOffset) {
102         return (byte) ((buf.get(headerOffset) & (byte) 0xf0) >> 4);
105     public static short ipChecksum(ByteBuffer buf, int headerOffset) {
106         byte ihl = (byte) (buf.get(headerOffset) & 0x0f);
107         return (short) checksum(buf, 0, headerOffset, headerOffset + ihl * 4);
110     private static short transportChecksum(ByteBuffer buf, int protocol,
116         byte ver = ipversion(buf, ipOffset);
118             sum = pseudoChecksumIPv4(buf, ipOffset, protocol, transportLen);
120             sum = pseudoChecksumIPv6(buf, ipOffset, protocol, transportLen);
125         sum = checksum(buf, sum, transportOffset, transportOffset + transportLen);
132     public static short udpChecksum(ByteBuffer buf, int ipOffset, int transportOffset) {
133         int transportLen = intAbs(buf.getShort(transportOffset + 4));
134         return transportChecksum(buf, IPPROTO_UDP, ipOffset, transportOffset, transportLen);
137     public static short tcpChecksum(ByteBuffer buf, int ipOffset, int transportOffset,
139         return transportChecksum(buf, IPPROTO_TCP, ipOffset, transportOffset, transportLen);