v1.2.2-2023.09.14

Note: This update fixes a serious bug.

Update:

1. Add function to print binary or hex for debug.
2. Print binary content of ICMP echo reply packet.
3. Source IP address display in debug message, plan to add in echo message.
4. Replace recv with recvfrom, fix sent faild in first time.
5. Fix the issue that program will receive all ICMP echo reply, now it filter the packet only id and seq matched, or drop it.
6. Add retry, prog will judge ping failed when after 8 packet not for this prog.
7. Add debug options.

v1.2.1-2022.12.08

Change log:

1. Use getopt to parse command line;
2. Add options 'h' and 'v';
3. Add log.c;