From 46f96ed5e3127394a0cd4dcb961404b792f743b4 Mon Sep 17 00:00:00 2001 From: Jakub Slawinski Date: Thu, 10 Jul 2014 10:24:59 +0200 Subject: Initial project structure based on Active Port Forwarder 0.8.4. --- src/buf_list_node_struct.c | 289 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 289 insertions(+) create mode 100644 src/buf_list_node_struct.c (limited to 'src/buf_list_node_struct.c') diff --git a/src/buf_list_node_struct.c b/src/buf_list_node_struct.c new file mode 100644 index 0000000..5416ce3 --- /dev/null +++ b/src/buf_list_node_struct.c @@ -0,0 +1,289 @@ +/* + * active port forwarder - software for secure forwarding + * Copyright (C) 2003-2007 jeremian + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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 + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#include + +#include +#include +#include + +#include "buf_list_node_struct.h" + +/* + * Function name: BufListNode_new + * Description: Creates and initializes new BufListNode structure. + * Returns: Newly created BufListNode structure. + */ + +BufListNode* +BufListNode_new() +{ + BufListNode* tmp = calloc(1, sizeof(BufListNode)); + assert(tmp != NULL); + if (tmp == NULL) { + return NULL; + } + return tmp; +} + +/* + * Function name: BufListNode_new_message + * Description: Create and initialize new BufListNode structure from given message + * with actual buffer pointer and message length. + * Arguments: actPtr - actual buffer pointer + * msgLen - length of the message + * message - message to be stored + * Returns: Newly created and initialized BufListNode structure. + */ + +BufListNode* +BufListNode_new_message(int actPtr, int msgLen, unsigned char* message) +{ + BufListNode* tmp = calloc(1, sizeof(BufListNode)); + assert(tmp != NULL); + if (tmp == NULL) { + return NULL; + } + BufListNode_set_message(tmp, message, msgLen); + BufListNode_set_actPtr(tmp, actPtr); + return tmp; +} + +/* + * Function name: BufListNode_free + * Description: Frees the memory allocated for BufListNode structure. + * Arguments: bln - pointer to pointer to BufListNode structure + */ + +void +BufListNode_free(BufListNode** bln) +{ + assert(bln != NULL); + if (bln == NULL) { + return; + } + assert((*bln) != NULL); + if ((*bln) == NULL) { + return; + } + if ((*bln)->message) { + free((*bln)->message); + (*bln)->message = NULL; + } + free((*bln)); + (*bln) = NULL; +} + +/* + * Function name: BufListNode_set_actPtr + * Description: Sets actual buffer pointer. + * Arguments: bln - pointer to BufListNode structure + * actPtr - actual buffer pointer + */ + +void +BufListNode_set_actPtr(BufListNode* bln, int actPtr) +{ + assert(bln != NULL); + if (bln == NULL) { + return; + } + bln->actPtr = actPtr; +} + +/* + * Function name: BufListNode_set_msgLen + * Description: Sets length of the message. + * Arguments: bln - pointer to BufListNode structure + * msgLen - length of the message + */ + +void +BufListNode_set_msgLen(BufListNode* bln, int msgLen) +{ + assert(bln != NULL); + if (bln == NULL) { + return; + } + bln->msgLen = msgLen; +} + +/* + * Function name: BufListNode_set_message + * Description: Sets message to be stored. + * Arguments: bln - pointer to BufListNode structure + * message - message to be stored + * msgLen - length of the message + */ + +void +BufListNode_set_message(BufListNode* bln, unsigned char* message, int msgLen) +{ + assert(bln != NULL); + if (bln == NULL) { + return; + } + if (bln->message) { + free(bln->message); + bln->message = NULL; + } + BufListNode_set_actPtr(bln, 0); + BufListNode_set_msgLen(bln, 0); + assert(message != NULL); + if (message == NULL) { + return; + } + bln->message = calloc(1, msgLen); + assert(bln->message != NULL); + if (bln->message == NULL) { + return; + } + memcpy(bln->message, message, msgLen); + BufListNode_set_msgLen(bln, msgLen); +} + +/* + * Function name: BufListNode_set_nextNode + * Description: Sets next node pointer. + * Arguments: bln - pointer to BufListNode structure + * nextNode - next node pointer + */ + +void +BufListNode_set_nextNode(BufListNode* bln, BufListNode* nextNode) +{ + assert(bln != NULL); + if (bln == NULL) { + return; + } + bln->nextNode = nextNode; +} + +/* + * Function name: BufListNode_get_actPtr + * Description: Gets actual buffer pointer. + * Aguments: bln - pointer to BufListNode structure + * Returns: Actual buffer pointer. + */ + +int +BufListNode_get_actPtr(BufListNode* bln) +{ + assert(bln != NULL); + if (bln == NULL) { + return -1; + } + return bln->actPtr; +} + +/* + * Function name: BufListNode_get_msgLen + * Description: Gets length of the message. + * Arguments: bln - pointer to BufListNode structure + * Returns: Length of the message. + */ + +int +BufListNode_get_msgLen(BufListNode* bln) +{ + assert(bln != NULL); + if (bln == NULL) { + return -1; + } + return bln->msgLen; +} + +/* + * Function name: BufListNode_get_message + * Description: Gets stored message. + * Arguments: bln - pointer to BufListNode structure + * Returns: Stored message. + */ + +unsigned char* +BufListNode_get_message(BufListNode* bln) +{ + assert(bln != NULL); + if (bln == NULL) { + return NULL; + } + return bln->message; +} + +/* + * Function name: BufListNode_get_nextNode + * Description: Gets next node pointer. + * Arguments: bln - pointer to BufListNode structure + * Returns: Next BufListNode structure pointer or NULL, if there is no next one. + */ + +BufListNode* +BufListNode_get_nextNode(BufListNode* bln) +{ + assert(bln != NULL); + if (bln == NULL) { + return NULL; + } + return bln->nextNode; +} + +/* + * Function name: BufListNode_readMessage + * Description: Reads the message from actual buffer pointer. + * Arguments: bln - pointer to BufListNode structure + * Returns: Tail of the message from actual buffer pointer. + */ + +unsigned char* +BufListNode_readMessage(BufListNode* bln) +{ + assert(bln != NULL); + if (bln == NULL) { + return NULL; + } + return (&bln->message[BufListNode_get_actPtr(bln)]); +} + +/* + * Function name: BufListNode_readMessageLength + * Description: Gets the amount of unread bytes in the message. + * Arguments: bln - pointer to BufListNode structure + * Returns: The amount of unread bytes in the message. + */ + +int +BufListNode_readMessageLength(BufListNode* bln) +{ + int tmp = 0; + assert(bln != NULL); + if (bln == NULL) { + return -1; + } + assert(BufListNode_get_message(bln) != NULL); + if (BufListNode_get_message(bln) == NULL) { + return -1; + } + tmp = BufListNode_get_msgLen(bln) - BufListNode_get_actPtr(bln); + assert(tmp >= 0); + if (tmp < 0) { + return 0; + } + return tmp; +} -- cgit v1.1