diff options
Diffstat (limited to 'flow.h')
| -rw-r--r-- | flow.h | 44 |
1 files changed, 38 insertions, 6 deletions
@@ -25,14 +25,42 @@ * NEW - Freshly allocated, uninitialised entry * Operations: * - flow_alloc_cancel() returns the entry to FREE + * - flow_initiate() sets the entry's INISIDE details and moves to + * INI * - FLOW_SET_TYPE() sets the entry's type and moves to TYPED * Caveats: * - No fields other than state may be accessed - * - At most one entry may be NEW or TYPED at a time, so it's unsafe - * to use flow_alloc() again until this entry moves to ACTIVE or - * FREE + * - At most one entry may be NEW, INI, TGT or TYPED at a time, so + * it's unsafe to use flow_alloc() again until this entry moves to + * ACTIVE or FREE * - You may not return to the main epoll loop while any flow is NEW * + * INI - An entry with INISIDE common information completed + * Operations: + * - Common fields related to INISIDE may be read + * - flow_alloc_cancel() returns the entry to FREE + * - flow_target() sets the entry's TGTSIDE details and moves to TGT + * Caveats: + * - Other common fields may not be read + * - Type specific fields may not be read or written + * - At most one entry may be NEW, INI, TGT or TYPED at a time, so + * it's unsafe to use flow_alloc() again until this entry moves to + * ACTIVE or FREE + * - You may not return to the main epoll loop while any flow is INI + * + * TGT - An entry with only INISIDE and TGTSIDE common information completed + * Operations: + * - Common fields related to INISIDE & TGTSIDE may be read + * - flow_alloc_cancel() returns the entry to FREE + * - FLOW_SET_TYPE() sets the entry's type and moves to TYPED + * Caveats: + * - Other common fields may not be read + * - Type specific fields may not be read or written + * - At most one entry may be NEW, INI, TGT or TYPED at a time, so + * it's unsafe to use flow_alloc() again until this entry moves to + * ACTIVE or FREE + * - You may not return to the main epoll loop while any flow is TGT + * * TYPED - Generic info initialised, type specific initialisation underway * Operations: * - All common fields may be read @@ -40,9 +68,9 @@ * - flow_alloc_cancel() returns the entry to FREE * - FLOW_ACTIVATE() moves the entry to ACTIVE * Caveats: - * - At most one entry may be NEW or TYPED at a time, so it's unsafe - * to use flow_alloc() again until this entry moves to ACTIVE or - * FREE + * - At most one entry may be NEW, INI, TGT or TYPED at a time, so + * it's unsafe to use flow_alloc() again until this entry moves to + * ACTIVE or FREE * - You may not return to the main epoll loop while any flow is * TYPED * @@ -58,6 +86,8 @@ enum flow_state { FLOW_STATE_FREE, FLOW_STATE_NEW, + FLOW_STATE_INI, + FLOW_STATE_TGT, FLOW_STATE_TYPED, FLOW_STATE_ACTIVE, @@ -109,6 +139,7 @@ extern const uint8_t flow_proto[]; * struct flow_common - Common fields for packet flows * @state: State of the flow table entry * @type: Type of packet flow + * @pif[]: Interface for each side of the flow */ struct flow_common { #ifdef __GNUC__ @@ -122,6 +153,7 @@ struct flow_common { static_assert(sizeof(uint8_t) * 8 >= FLOW_TYPE_BITS, "Not enough bits for type field"); #endif + uint8_t pif[SIDES]; }; #define FLOW_INDEX_BITS 17 /* 128k - 1 */ |