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@ -27,506 +27,8 @@
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#include "suricata.h"
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#include "debug.h"
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#include "flow.h"
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#include "flow-file.h"
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#include "util-hash.h"
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#include "util-debug.h"
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#include "util-memcmp.h"
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#include "util-print.h"
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/* prototypes */
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static void FlowFileFree(FlowFile *);
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int FlowFileMagicSize(void) {
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return 512;
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}
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/**
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* \brief check if we have stored enough
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*
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* \param ff file
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*
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* \retval 0 limit not reached yet
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* \retval 1 limit reached
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*/
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static int FlowFileStoreNoStoreCheck(FlowFile *ff) {
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SCEnter();
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if (ff == NULL) {
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SCReturnInt(0);
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}
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if (ff->store == -1) {
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if (ff->state == FLOWFILE_STATE_OPENED &&
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ff->size >= (uint64_t)FlowFileMagicSize())
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{
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SCReturnInt(1);
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}
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}
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SCReturnInt(0);
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}
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/**
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* \brief allocate a FlowFileContainer
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*
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* \retval new newly allocated FlowFileContainer
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* \retval NULL error
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*/
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FlowFileContainer *FlowFileContainerAlloc(void) {
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FlowFileContainer *new = SCMalloc(sizeof(FlowFileContainer));
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if (new == NULL) {
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SCLogError(SC_ERR_MEM_ALLOC, "Error allocating mem");
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return NULL;
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}
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memset(new, 0, sizeof(FlowFileContainer));
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new->head = new->tail = NULL;
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return new;
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}
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/**
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* \brief Recycle a FlowFileContainer
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*
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* \param ffc FlowFileContainer
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*/
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void FlowFileContainerRecycle(FlowFileContainer *ffc) {
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if (ffc == NULL)
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return;
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FlowFile *cur = ffc->head;
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FlowFile *next = NULL;
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for (;cur != NULL; cur = next) {
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next = cur->next;
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FlowFileFree(cur);
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}
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ffc->head = ffc->tail = NULL;
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}
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/**
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* \brief Free a FlowFileContainer
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*
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* \param ffc FlowFileContainer
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*/
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void FlowFileContainerFree(FlowFileContainer *ffc) {
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if (ffc == NULL)
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return;
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FlowFile *ptr = ffc->head;
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FlowFile *next = NULL;
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for (;ptr != NULL; ptr = next) {
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next = ptr->next;
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FlowFileFree(ptr);
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}
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ffc->head = ffc->tail = NULL;
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SCFree(ffc);
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}
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/**
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* \internal
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*
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* \brief allocate a FlowFileData chunk and set it up
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*
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* \param data data chunk to store in the FlowFileData
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* \param data_len lenght of the data
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*
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* \retval new FlowFileData object
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*/
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static FlowFileData *FlowFileDataAlloc(uint8_t *data, uint32_t data_len) {
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FlowFileData *new = SCMalloc(sizeof(FlowFileData));
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if (new == NULL) {
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return NULL;
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}
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memset(new, 0, sizeof(FlowFileData));
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new->data = SCMalloc(data_len);
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if (new->data == NULL) {
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SCFree(new);
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return NULL;
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}
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new->len = data_len;
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memcpy(new->data, data, data_len);
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new->next = NULL;
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return new;
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}
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/**
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* \internal
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*
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* \brief free a FlowFileData object
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*
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* \param ffd the flow file data object to free
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*/
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static void FlowFileDataFree(FlowFileData *ffd) {
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if (ffd == NULL)
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return;
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if (ffd->data != NULL) {
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SCFree(ffd->data);
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}
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SCFree(ffd);
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}
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static int FlowFileAppendFlowFileDataFilePtr(FlowFile *ff, FlowFileData *ffd) {
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SCEnter();
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if (ff == NULL) {
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SCReturnInt(-1);
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}
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if (ff->chunks_tail == NULL) {
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ff->chunks_head = ffd;
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ff->chunks_tail = ffd;
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} else {
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ff->chunks_tail->next = ffd;
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ff->chunks_tail = ffd;
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}
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ff->size += ffd->len;
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SCLogDebug("file size %"PRIu64, ff->size);
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SCReturnInt(0);
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}
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static int FlowFileAppendFlowFileData(FlowFileContainer *ffc, FlowFileData *ffd) {
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SCEnter();
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if (ffc == NULL) {
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SCReturnInt(-1);
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}
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if (FlowFileAppendFlowFileDataFilePtr(ffc->tail, ffd) == -1)
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{
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SCReturnInt(-1);
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}
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SCReturnInt(0);
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}
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/**
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* \brief Alloc a new FlowFile
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*
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* \param name character array containing the name (not a string)
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* \param name_len length in bytes of the name
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*
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* \retval new FlowFile object or NULL on error
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*/
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static FlowFile *FlowFileAlloc(uint8_t *name, uint16_t name_len) {
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FlowFile *new = SCMalloc(sizeof(FlowFile));
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if (new == NULL) {
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SCLogError(SC_ERR_MEM_ALLOC, "Error allocating mem");
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return NULL;
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}
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memset(new, 0, sizeof(FlowFile));
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new->fd = -1;
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new->name = SCMalloc(name_len);
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if (new->name == NULL) {
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SCFree(new);
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return NULL;
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}
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new->name_len = name_len;
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memcpy(new->name, name, name_len);
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return new;
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}
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static void FlowFileFree(FlowFile *ff) {
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if (ff == NULL)
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return;
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if (ff->fd != -1)
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close(ff->fd);
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if (ff->name != NULL)
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SCFree(ff->name);
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SCFree(ff);
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}
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void FlowFileContainerAdd(FlowFileContainer *ffc, FlowFile *ff) {
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if (ffc->head == NULL) {
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ffc->head = ffc->tail = ff;
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} else {
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ffc->tail->next = ff;
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ffc->tail = ff;
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}
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}
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/**
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* \brief Open a new FlowFile
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*
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* \param ffc flow container
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* \param name filename character array
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* \param name_len filename len
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* \param data initial data
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* \param data_len initial data len
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* \param flags open flags
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*
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* \retval ff flowfile object
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*
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* \note filename is not a string, so it's not nul terminated.
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*/
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FlowFile *FlowFileOpenFile(FlowFileContainer *ffc, uint8_t *name,
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uint16_t name_len, uint8_t *data, uint32_t data_len, uint8_t flags)
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{
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SCEnter();
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//PrintRawDataFp(stdout, name, name_len);
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FlowFile *ff = FlowFileAlloc(name, name_len);
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if (ff == NULL) {
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SCReturnPtr(NULL, "FlowFile");
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}
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if (flags & FLOW_FILE_NOSTORE) {
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ff->store = -1;
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}
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ff->state = FLOWFILE_STATE_OPENED;
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SCLogDebug("flowfile state transitioned to FLOWFILE_STATE_OPENED");
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FlowFileContainerAdd(ffc, ff);
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if (data != NULL) {
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//PrintRawDataFp(stdout, data, data_len);
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FlowFileData *ffd = FlowFileDataAlloc(data, data_len);
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if (ffd == NULL) {
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ff->state = FLOWFILE_STATE_ERROR;
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SCReturnPtr(NULL, "FlowFile");
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}
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/* append the data */
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if (FlowFileAppendFlowFileData(ffc, ffd) < 0) {
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ff->state = FLOWFILE_STATE_ERROR;
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FlowFileDataFree(ffd);
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SCReturnPtr(NULL, "FlowFile");
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}
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}
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SCReturnPtr(ff, "FlowFile");
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}
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static int FlowFileCloseFilePtr(FlowFile *ff, uint8_t *data,
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uint32_t data_len, uint8_t flags)
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{
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SCEnter();
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if (ff == NULL) {
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SCReturnInt(-1);
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}
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if (ff->state != FLOWFILE_STATE_OPENED) {
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SCReturnInt(-1);
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}
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if (data != NULL) {
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//PrintRawDataFp(stdout, data, data_len);
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FlowFileData *ffd = FlowFileDataAlloc(data, data_len);
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if (ffd == NULL) {
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ff->state = FLOWFILE_STATE_ERROR;
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SCReturnInt(-1);
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}
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/* append the data */
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if (FlowFileAppendFlowFileDataFilePtr(ff, ffd) < 0) {
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ff->state = FLOWFILE_STATE_ERROR;
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FlowFileDataFree(ffd);
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SCReturnInt(-1);
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}
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}
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if (flags & FLOW_FILE_TRUNCATED) {
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ff->state = FLOWFILE_STATE_TRUNCATED;
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SCLogDebug("flowfile state transitioned to FLOWFILE_STATE_TRUNCATED");
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if (flags & FLOW_FILE_NOSTORE) {
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ff->store = -1;
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}
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} else {
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ff->state = FLOWFILE_STATE_CLOSED;
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SCLogDebug("flowfile state transitioned to FLOWFILE_STATE_CLOSED");
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}
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SCReturnInt(0);
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}
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/**
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* \brief Close a FlowFile
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*
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* \param ffc the container
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* \param data final data if any
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* \param data_len data len if any
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* \param flags flags
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*
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* \retval 0 ok
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* \retval -1 error
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*/
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int FlowFileCloseFile(FlowFileContainer *ffc, uint8_t *data,
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uint32_t data_len, uint8_t flags)
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{
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SCEnter();
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if (ffc == NULL || ffc->tail == NULL) {
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SCReturnInt(-1);
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}
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if (FlowFileCloseFilePtr(ffc->tail, data, data_len, flags) == -1) {
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SCReturnInt(-1);
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}
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SCReturnInt(0);
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}
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/**
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* \brief Store a chunk of file data in the flow. The open "flowfile"
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* will be used.
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*
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* \param ffc the container
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* \param data data chunk
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* \param data_len data chunk len
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*
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* \retval 0 ok
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* \retval -1 error
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* \retval -2 no store for this file
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*/
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int FlowFileAppendData(FlowFileContainer *ffc, uint8_t *data, uint32_t data_len) {
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SCEnter();
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if (ffc == NULL || ffc->tail == NULL || data == NULL || data_len == 0) {
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SCReturnInt(-1);
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}
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if (ffc->tail->state != FLOWFILE_STATE_OPENED) {
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if (ffc->tail->store == -1) {
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SCReturnInt(-2);
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}
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SCReturnInt(-1);
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}
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if (FlowFileStoreNoStoreCheck(ffc->tail) == 1) {
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ffc->tail->state = FLOWFILE_STATE_CLOSED;
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SCLogDebug("flowfile state transitioned to FLOWFILE_STATE_CLOSED");
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SCReturnInt(-2);
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}
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SCLogDebug("appending %"PRIu32" bytes", data_len);
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FlowFileData *ffd = FlowFileDataAlloc(data, data_len);
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if (ffd == NULL) {
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ffc->tail->state = FLOWFILE_STATE_ERROR;
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SCReturnInt(-1);
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}
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/* append the data */
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if (FlowFileAppendFlowFileData(ffc, ffd) < 0) {
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ffc->tail->state = FLOWFILE_STATE_ERROR;
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FlowFileDataFree(ffd);
|
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SCReturnInt(-1);
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}
|
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SCReturnInt(0);
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}
|
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|
/**
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|
* \brief Tag a file for storing
|
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|
*
|
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|
|
* \param ff The file to store
|
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|
|
*/
|
|
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|
|
int FlowFileStore(FlowFile *ff) {
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|
|
ff->store = 1;
|
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|
|
SCReturnInt(0);
|
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|
}
|
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|
/**
|
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|
|
* \brief Set the TX id for a file
|
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|
|
*
|
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|
|
* \param ff The file to store
|
|
|
|
|
* \param txid the tx id
|
|
|
|
|
*/
|
|
|
|
|
int FlowFileSetTx(FlowFile *ff, uint16_t txid) {
|
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|
|
ff->txid = txid;
|
|
|
|
|
SCReturnInt(0);
|
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|
|
|
}
|
|
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|
|
|
|
|
/**
|
|
|
|
|
* \brief disable file storage for a flow
|
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|
|
|
*
|
|
|
|
|
* \param f *LOCKED* flow
|
|
|
|
|
*/
|
|
|
|
|
void FlowFileDisableStoring(Flow *f) {
|
|
|
|
|
FlowFile *ptr = NULL;
|
|
|
|
|
|
|
|
|
|
SCEnter();
|
|
|
|
|
|
|
|
|
|
f->flags |= FLOW_FILE_NO_HANDLING;
|
|
|
|
|
|
|
|
|
|
SCMutexLock(&f->files_m);
|
|
|
|
|
if (f->files != NULL) {
|
|
|
|
|
for (ptr = f->files->head; ptr != NULL; ptr = ptr->next) {
|
|
|
|
|
if (ptr->state == FLOWFILE_STATE_OPENED) {
|
|
|
|
|
|
|
|
|
|
if (ptr->store == 0) {
|
|
|
|
|
ptr->store = -1;
|
|
|
|
|
}
|
|
|
|
|
// ptr->state = FLOWFILE_STATE_CLOSED;
|
|
|
|
|
// SCLogDebug("flowfile state transitioned to FLOWFILE_STATE_CLOSED");
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
SCMutexUnlock(&f->files_m);
|
|
|
|
|
SCReturn;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* \brief set no store flag, close file if needed
|
|
|
|
|
*
|
|
|
|
|
* \param ff file
|
|
|
|
|
*/
|
|
|
|
|
static void FlowFileDisableStoringForFile(FlowFile *ff) {
|
|
|
|
|
SCEnter();
|
|
|
|
|
|
|
|
|
|
if (ff == NULL) {
|
|
|
|
|
SCReturn;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ff->store = -1;
|
|
|
|
|
|
|
|
|
|
if (ff->state == FLOWFILE_STATE_OPENED && ff->size >= (uint64_t)FlowFileMagicSize()) {
|
|
|
|
|
(void)FlowFileCloseFilePtr(ff, NULL, 0,
|
|
|
|
|
(FLOW_FILE_TRUNCATED|FLOW_FILE_NOSTORE));
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* \brief disable file storing for files in a transaction
|
|
|
|
|
*
|
|
|
|
|
* \param f flow
|
|
|
|
|
* \param tx_id transaction id
|
|
|
|
|
*/
|
|
|
|
|
void FlowFileDisableStoringForTransaction(struct Flow_ *f, uint16_t tx_id) {
|
|
|
|
|
FlowFile *ptr = NULL;
|
|
|
|
|
|
|
|
|
|
SCEnter();
|
|
|
|
|
|
|
|
|
|
SCMutexLock(&f->files_m);
|
|
|
|
|
if (f->files != NULL) {
|
|
|
|
|
for (ptr = f->files->head; ptr != NULL; ptr = ptr->next) {
|
|
|
|
|
if (ptr->state == FLOWFILE_STATE_OPENED && ptr->txid == tx_id) {
|
|
|
|
|
if (ptr->store == 1) {
|
|
|
|
|
/* weird, already storing -- let it continue*/
|
|
|
|
|
SCLogDebug("file is already being stored");
|
|
|
|
|
} else {
|
|
|
|
|
FlowFileDisableStoringForFile(ptr);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
SCMutexUnlock(&f->files_m);
|
|
|
|
|
|
|
|
|
|
SCReturn;
|
|
|
|
|
}
|
|
|
|
|
|
Victor Julien
15 years ago