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author | Thomas Graf <tgraf@suug.ch> | 2010-10-29 19:10:02 (GMT) |
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committer | Thomas Graf <tgraf@suug.ch> | 2010-10-29 19:10:02 (GMT) |
commit | c7a673787b9dabca5b29fed0eee526156df66807 (patch) | |
tree | 774b20118e3e8d398ac3796588cb966b051afc4d /lib/route/cls/ematch_syntax.y | |
parent | 93f992eac5a0d35114de4e937326d1d03a53a25f (diff) | |
download | libnl-c7a673787b9dabca5b29fed0eee526156df66807.zip libnl-c7a673787b9dabca5b29fed0eee526156df66807.tar.gz libnl-c7a673787b9dabca5b29fed0eee526156df66807.tar.bz2 |
text ematch support
Diffstat (limited to 'lib/route/cls/ematch_syntax.y')
-rw-r--r-- | lib/route/cls/ematch_syntax.y | 70 |
1 files changed, 63 insertions, 7 deletions
diff --git a/lib/route/cls/ematch_syntax.y b/lib/route/cls/ematch_syntax.y index b6d04c9..26642a3 100644 --- a/lib/route/cls/ematch_syntax.y +++ b/lib/route/cls/ematch_syntax.y @@ -18,6 +18,7 @@ #include <netlink/route/cls/ematch.h> #include <netlink/route/cls/ematch/cmp.h> #include <netlink/route/cls/ematch/nbyte.h> +#include <netlink/route/cls/ematch/text.h> %} %error-verbose @@ -56,9 +57,12 @@ static void yyerror(void *scanner, char **errp, struct nl_list_head *root, const %token <i> KW_AT "at" %token <i> EMATCH_CMP "cmp" %token <i> EMATCH_NBYTE "pattern" +%token <i> EMATCH_TEXT "text" %token <i> KW_EQ "=" %token <i> KW_GT ">" %token <i> KW_LT "<" +%token <i> KW_FROM "from" +%token <i> KW_TO "to" %token <s> STR @@ -67,7 +71,7 @@ static void yyerror(void *scanner, char **errp, struct nl_list_head *root, const %type <i> mask align operand %type <e> expr match ematch %type <cmp> cmp_expr cmp_match -%type <loc> pktloc +%type <loc> pktloc text_from text_to %type <q> pattern %destructor { free($$); NL_DBG(2, "string destructor\n"); } <s> @@ -144,10 +148,38 @@ ematch: BUG(); rtnl_ematch_nbyte_set_offset(e, $3->layer, $3->offset); + rtnl_pktloc_put($3); rtnl_ematch_nbyte_set_pattern(e, (uint8_t *) $5.data, $5.index); $$ = e; } + | EMATCH_TEXT "(" STR QUOTED text_from text_to ")" + { + struct rtnl_ematch *e; + + if (!(e = rtnl_ematch_alloc())) { + asprintf(errp, "Unable to allocate ematch object"); + YYABORT; + } + + if (rtnl_ematch_set_kind(e, TCF_EM_TEXT) < 0) + BUG(); + + rtnl_ematch_text_set_algo(e, $3); + rtnl_ematch_text_set_pattern(e, $4.data, $4.index); + + if ($5) { + rtnl_ematch_text_set_from(e, $5->layer, $5->offset); + rtnl_pktloc_put($5); + } + + if ($6) { + rtnl_ematch_text_set_to(e, $6->layer, $6->offset); + rtnl_pktloc_put($6); + } + + $$ = e; + } /* CONTAINER */ | "(" expr ")" { @@ -198,9 +230,25 @@ cmp_expr: $$.layer = $1->layer; $$.opnd = $2; $$.val = $3; + + rtnl_pktloc_put($1); } ; +text_from: + /* empty */ + { $$ = NULL; } + | "from" pktloc + { $$ = $2; } + ; + +text_to: + /* empty */ + { $$ = NULL; } + | "to" pktloc + { $$ = $2; } + ; + /* * pattern */ @@ -248,10 +296,16 @@ pktloc: $$ = loc; } - | align "at" LAYER "+" NUMBER mask + /* [u8|u16|u32|NUM at] LAYER + OFFSET [mask MASK] */ + | align LAYER "+" NUMBER mask { struct rtnl_pktloc *loc; + if ($5 && (!$1 || $1 > TCF_EM_ALIGN_U32)) { + asprintf(errp, "mask only allowed for alignments u8|u16|u32"); + YYABORT; + } + if (!(loc = rtnl_pktloc_alloc())) { asprintf(errp, "Unable to allocate packet location object"); YYABORT; @@ -259,18 +313,20 @@ pktloc: loc->name = strdup("<USER-DEFINED>"); loc->align = $1; - loc->layer = $3; - loc->offset = $5; - loc->mask = $6; + loc->layer = $2; + loc->offset = $4; + loc->mask = $5; $$ = loc; } ; align: - ALIGN + /* empty */ + { $$ = 0; } + | ALIGN "at" { $$ = $1; } - | NUMBER + | NUMBER "at" { $$ = $1; } ; |