Seeing Help for Parse TCP Option about tutorials HOT 3 CLOSED

TCP options are very similar to IPv4 options AFAIK. So I invite you to take a look at the TLV parsing example in this repo: https://github.com/p4lang/tutorials/tree/master/examples/TLV_parsing
Please be sure to read the README for that example, as there is one important caveat.

from tutorials.

Really sorry about the other tow duplicate posts,I thought there were different people maintain different repositories .

There are a some details about the P4 source code confusing me

1. (line 96) header ipv4_option_NOP_t ipv4_option_NOP[3];
   why the array count is 3 ? can other number work ?

2. (line 137、144) extract(ipv4_option_EOL[next]);
   what does next mean?

Appreciate your help , thank you .
John.

from tutorials.

1. You have to pick a size for the array / stack, which will be the maximum number of NOP options in any given packet. You can choose any number that works for you, keeping in mind that in real hardware a higher number would mean more resources utilized.

2. The answer should be in the P4_14 spec.

from tutorials.