commit a209ff12ba9617c10550678ff93d01fb72a33399
author Paul Stewart <pstew@google.com> Tue May 31 17:31:03 2016 -0700
committer The Android Automerger <android-build@google.com> Thu Jun 23 15:06:32 2016 -0700
tree 1d023f32ee9f59c3174e94700cd9f08e4d0a63e4
parent 7a0e978a5ba16f237c7ef8aac9cb6154d2d183bd

Deal correctly with short strings

The parseMacAddress function anticipates only properly formed
MAC addresses (6 hexadecimal octets separated by ":").  This
change properly deals with situations where the string is
shorter than expected, making sure that the passed in char*
reference in parseHexByte never exceeds the end of the string.

BUG: 28164077
TEST: Added a main function:

int main(int argc, char **argv) {
   unsigned char addr[6];
   if (argc > 1) {
      memset(addr, 0, sizeof(addr));
      parseMacAddress(argv[1], addr);
      printf("Result: %02x:%02x:%02x:%02x:%02x:%02x\n",
              addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]);
   }
}

Tested with "", "a" "ab" "ab:c" "abxc".

Change-Id: I0db8d0037e48b62333d475296a45b22ab0efe386