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Function to set expire timer of an added entry. #44

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Jul 14, 2022
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Function to set expire timer of an added entry. #44

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eb5bf3f
Function to set expire timer of an added entry.
roop-nvda May 31, 2022
2e71be3
Replace match arguments with a condition.
roop-nvda Jun 29, 2022
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25 changes: 25 additions & 0 deletions pna.p4
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Original file line number Diff line number Diff line change
Expand Up @@ -743,6 +743,31 @@ extern void update_expire_info(
in ExpireTimeProfileId_t expire_time_profile_id);


// Set the expire time of the matched entry in the table to the value
// specified in the parameter expire_time_profile_id, if condition
// in the first parameter evaluates to true. Otherwise, the function
// has no effect.
//
// @param condition The boolean expression to evaluate to determine
// if the expire time will be set.
// @param expire_time_profile_id
// The expire time to set for the matched entry,
// if the data and value parameters are equal.
//
// Examples:
// set_expire_time_if(hdr.tcp.flags == TCP_FLG_SYN &&
// meta.direction == OUTBOUND,
// tcp_connection_start_time_profile_id);
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@jfingerh jfingerh Jun 27, 2022 •
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If the new parameters for set_expire_time_if were a single additional parameter in bool condition, then the example above could be written as shown below:

set_expire_time_if((hdr.tcp.flags == TCP_FLG_SYN) && (meta.direction == OUTBOUND),
                   tcp_connection_start_time_profile_id);

// set_expire_time_if(hdr.tcp.flags == TCP_FLG_ACK,
// tcp_connection_continuation_time_protile_id);
// set_expire_time_if(hdr.tcp.flags == TCP_FLG_FIN,
// tcp_connection_close_time_profile_id);

extern void set_entry_expire_time_if(
in bool condition,
in ExpireTimeProfileId_t expire_time_profile_id);


// SelectByDirection is a simple pure function that behaves exactly as
// the P4_16 function definition given in comments below. It is an
// extern function to ensure that the front/mid end of the p4c
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