914bffb6ab
* Add "flow:hash" algorithm Kernel changes: * Add O_IP_FLOW_LOOKUP opcode to support "flow" lookups * Add IPFW_TABLE_FLOW table type * Add "struct tflow_entry" as strage for 6-tuple flows * Add "flow:hash" algorithm. Basically it is auto-growing chained hash table. Additionally, we store mask of fields we need to compare in each instance/ * Increase ipfw_obj_tentry size by adding struct tflow_entry * Add per-algorithm stat (ifpw_ta_tinfo) to ipfw_xtable_info * Increase algoname length: 32 -> 64 (algo options passed there as string) * Assume every table type can be customized by flags, use u8 to store "tflags" field. * Simplify ipfw_find_table_entry() by providing @tentry directly to algo callback. * Fix bug in cidr:chash resize procedure. Userland changes: * add "flow table(NAME)" syntax to support n-tuple checking tables. * make fill_flags() separate function to ease working with _s_x arrays * change "table info" output to reflect longer "type" fields Syntax: ipfw table fl2 create type flow:[src-ip][,proto][,src-port][,dst-ip][dst-port] [algo flow:hash] Examples: 0:02 [2] zfscurr0# ipfw table fl2 create type flow:src-ip,proto,dst-port algo flow:hash 0:02 [2] zfscurr0# ipfw table fl2 info +++ table(fl2), set(0) +++ kindex: 0, type: flow:src-ip,proto,dst-port valtype: number, references: 0 algorithm: flow:hash items: 0, size: 280 0:02 [2] zfscurr0# ipfw table fl2 add 2a02:6b8::333,tcp,443 45000 0:02 [2] zfscurr0# ipfw table fl2 add 10.0.0.92,tcp,80 22000 0:02 [2] zfscurr0# ipfw table fl2 list +++ table(fl2), set(0) +++ 2a02:6b8::333,6,443 45000 10.0.0.92,6,80 22000 0:02 [2] zfscurr0# ipfw add 200 count tcp from me to 78.46.89.105 80 flow 'table(fl2)' 00200 count tcp from me to 78.46.89.105 dst-port 80 flow table(fl2) 0:03 [2] zfscurr0# ipfw show 00200 0 0 count tcp from me to 78.46.89.105 dst-port 80 flow table(fl2) 65535 617 59416 allow ip from any to any 0:03 [2] zfscurr0# telnet -s 10.0.0.92 78.46.89.105 80 Trying 78.46.89.105... .. 0:04 [2] zfscurr0# ipfw show 00200 5 272 count tcp from me to 78.46.89.105 dst-port 80 flow table(fl2) 65535 682 66733 allow ip from any to any |
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