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Diffstat (limited to 'src/util-var.c')
| -rw-r--r-- | src/util-var.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/util-var.c b/src/util-var.c new file mode 100644 index 0000000..8a2df63 --- /dev/null +++ b/src/util-var.c @@ -0,0 +1,174 @@ +/* Copyright (C) 2007-2013 Open Information Security Foundation + * + * You can copy, redistribute or modify this Program under the terms of + * the GNU General Public License version 2 as published by the Free + * Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +/** + * \file + * + * \author Victor Julien <victor@inliniac.net> + * + * Generic variable utility functions + */ + +#include "suricata-common.h" +#include "detect.h" + +#include "util-var.h" + +#include "flow-var.h" +#include "flow-bit.h" +#include "pkt-var.h" +#include "host-bit.h" +#include "ippair-bit.h" + +#include "util-debug.h" + +void XBitFree(XBit *fb) +{ + if (fb == NULL) + return; + + SCFree(fb); +} + +void GenericVarFree(GenericVar *gv) +{ + if (gv == NULL) + return; + + SCLogDebug("gv %p, gv->type %" PRIu32 "", gv, gv->type); + GenericVar *next_gv = gv->next; + + switch (gv->type) { + case DETECT_FLOWBITS: + { + FlowBit *fb = (FlowBit *)gv; + //printf("GenericVarFree: fb %p, removing\n", fb); + FlowBitFree(fb); + break; + } + case DETECT_XBITS: + { + XBit *fb = (XBit *)gv; + //printf("GenericVarFree: fb %p, removing\n", fb); + XBitFree(fb); + break; + } + case DETECT_FLOWVAR: + { + FlowVar *fv = (FlowVar *)gv; + FlowVarFree(fv); + break; + } + case DETECT_PKTVAR: + { + PktVar *pv = (PktVar *)gv; + PktVarFree(pv); + break; + } + default: + { + printf("ERROR: GenericVarFree unknown type %" PRIu32 "\n", gv->type); + break; + } + } + + GenericVarFree(next_gv); +} + +void GenericVarAppend(GenericVar **list, GenericVar *gv) +{ + gv->next = NULL; + + if (*list == NULL) { + *list = gv; + } else { + GenericVar *tgv = *list; + while(tgv) { + if (tgv->next == NULL) { + tgv->next = gv; + return; + } + + tgv = tgv->next; + } + } +} + +void GenericVarRemove(GenericVar **list, GenericVar *gv) +{ + if (*list == NULL) + return; + + GenericVar *listgv = *list, *prevgv = NULL; + while (listgv != NULL) { + if (listgv == gv) { + if (prevgv == NULL) + *list = gv->next; + else + prevgv->next = gv->next; + + return; + } + + prevgv = listgv; + listgv = listgv->next; + } +} + +// Checks if a variable is already in a resolve list and if it's not, adds it. +int AddVariableToResolveList(ResolvedVariablesList *list, const char *var) +{ + ResolvedVariable *p_item; + + if (list == NULL || var == NULL) + return 0; + + if (var[0] != '$') { + return 0; + } + + TAILQ_FOREACH(p_item, list, next) { + if (!strcmp(p_item->var_name, var)) { + return -1; + } + } + + p_item = SCMalloc(sizeof(ResolvedVariable)); + + if (unlikely(p_item == NULL)) { + return -1; + } + + strlcpy(p_item->var_name, var, sizeof(p_item->var_name) - 1); + TAILQ_INSERT_TAIL(list, p_item, next); + + return 0; +} + +void CleanVariableResolveList(ResolvedVariablesList *var_list) +{ + if (var_list == NULL) { + return; + } + + ResolvedVariable *p_item; + + while ((p_item = TAILQ_FIRST(var_list))) { + TAILQ_REMOVE(var_list, p_item, next); + SCFree(p_item); + } +} |