Appendix E. Programming Structures for Data Formats
The following syntax descriptions provide sample C or C++ data structures that represent various protocol message formats. To implement Internet Protocol (IP), you can use the following data structure:
struct ipdtgrm { unsigned char ipver; unsigned char tos; short iplen; short id; short fragofst; unsigned char ttl; unsigned char protoc; short checksm; char *srcaddrs; char *destaddrs; unsigned char data; };
The Internet Control Message Protocol messages can be represented as data structures, displayed in the following syntax:
struct icmpmsg { char type; char code; short checksum; short msgid; short sqncenum; char *gtwaddr; char *param; char *padlen; int rsv=0; char *data; };
The following ...
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