Merged in dstaesse/ouroboros/remove-du-buff (pull request #146)

lib, ipcpd: removed du_buff and pci

1 files changed, 0 insertions, 380 deletions

diff --git a/src/lib/du_buff.c b/src/lib/du_buff.c
deleted file mode 100644
index 5f9d6f28..00000000
--- a/src/lib/du_buff.c
+++ /dev/null
@@ -1,380 +0,0 @@
-/*
- * Ouroboros - Copyright (C) 2016
- *
- * Data Unit Buffer
- *
- *    Dimitri Staessens <[email protected]>
- *    Sander Vrijders   <[email protected]>
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-
-#include <ouroboros/du_buff.h>
-#include <ouroboros/list.h>
-
-#define OUROBOROS_PREFIX "du_buff"
-
-#include "ouroboros/logs.h"
-
-#define DU_BLOCK_DATA_SIZE (DU_BUFF_BLOCK_SIZE - sizeof (struct buffer))
-
-struct buffer {
-        uint8_t        * data;
-        size_t           size;
-        struct list_head list;
-};
-
-struct du_buff {
-        struct buffer  * buffer;
-        size_t           size;
-        size_t           du_head;
-        size_t           du_tail;
-};
-
-static void buffer_destroy(struct buffer * buf)
-{
-        if (buf == NULL) {
-                LOG_DBGF("Bogus input, bugging out.");
-                return;
-        }
-
-        free (buf->data);
-        free (buf);
-}
-
-static void buffer_destroy_list(struct buffer * head)
-{
-        struct list_head * ptr;
-        struct list_head * n;
-
-        if (head == NULL) {
-                LOG_DBGF("Bogus input, bugging out.");
-                return;
-        }
-
-        list_for_each_safe(ptr, n, &(head->list)) {
-                struct buffer * tmp = list_entry(ptr, struct buffer, list);
-                list_del(ptr);
-                buffer_destroy(tmp);
-        }
-        free(head);
-}
-
-static struct buffer * buffer_create (size_t size, size_t headspace, size_t len)
-{
-        struct buffer * head = NULL;
-        size_t          remaining = size;
-        size_t          ts = size - (headspace + len);
-
-        if (headspace > DU_BLOCK_DATA_SIZE || ts > DU_BLOCK_DATA_SIZE) {
-                LOG_ERR("Illegal du_buff: Cannot fit PCI in DU_BUFF_BLOCK.");
-                return NULL;
-        }
-
-        head = malloc(sizeof *head);
-        if (head == NULL)
-                return NULL;
-
-        head->size = 0;
-        head->data = NULL;
-
-        INIT_LIST_HEAD(&(head->list));
-
-        while (remaining > 0) {
-                struct buffer * buf;
-
-                size_t sz;
-
-                if (size > DU_BLOCK_DATA_SIZE
-                           && remaining - ts <=  DU_BLOCK_DATA_SIZE
-                           && remaining != ts) {
-                        sz = remaining - ts;
-                } else if (size > DU_BLOCK_DATA_SIZE && remaining == ts) {
-                        sz = ts;
-                } else {
-                        sz = remaining < DU_BLOCK_DATA_SIZE ?
-                                remaining : DU_BLOCK_DATA_SIZE;
-                }
-
-                buf = malloc(sizeof *buf);
-                if (buf == NULL) {
-                        LOG_WARN("Could not allocate struct.");
-                        free(head);
-                        return NULL;
-                }
-
-                if (sz > 0) {
-                        buf->data = malloc(sz);
-                        if (buf->data == NULL) {
-                                LOG_WARN("Could not allocate memory block.");
-                                buffer_destroy_list(head);
-                                free(head);
-                                free(buf);
-                                return NULL;
-                        }
-                } else {
-                        buf->data = NULL;
-                }
-
-                buf->size = sz;
-
-                list_add_tail(&(buf->list), &(head->list));
-
-                remaining -= buf->size;
-        }
-
-        return head;
-}
-
-static struct buffer * buffer_seek(const struct buffer * head, size_t pos)
-{
-        struct list_head * ptr = NULL;
-        size_t cur_buf_start   = 0;
-        size_t cur_buf_end     = 0;
-
-        if (head == NULL) {
-                LOG_DBGF("Bogus input, bugging out.");
-                return NULL;
-        }
-
-        list_for_each(ptr, &(head->list)) {
-                struct buffer * tmp = list_entry(ptr, struct buffer, list);
-
-                cur_buf_end = cur_buf_start + tmp->size;
-                if (cur_buf_end > pos)
-                        return tmp;
-
-                cur_buf_start = cur_buf_end;
-        }
-
-        return NULL;
-}
-
-static uint8_t * buffer_seek_pos(const struct buffer * head, size_t pos)
-{
-        struct list_head * ptr = NULL;
-        size_t cur_buf_start   = 0;
-        size_t cur_buf_end     = 0;
-
-        if (head == NULL) {
-                LOG_DBGF("Bogus input, bugging out.");
-                return NULL;
-        }
-
-        list_for_each(ptr, &(head->list)) {
-                struct buffer * tmp = list_entry(ptr, struct buffer, list);
-
-                cur_buf_end = cur_buf_start + tmp->size;
-
-                if (cur_buf_end > pos)
-                        return tmp->data + (pos - cur_buf_start);
-
-                cur_buf_start = cur_buf_end;
-        }
-
-        return NULL;
-}
-
-static int buffer_copy_data(struct buffer * head,
-                     size_t          pos,
-                     const void    * src,
-                     size_t          len)
-{
-        struct list_head * ptr       = NULL;
-        struct buffer    * buf_start = NULL;
-        struct buffer    * buf_end   = NULL;
-        uint8_t          * ptr_start = NULL;
-        size_t             space_in_buf;
-        size_t             bytes_remaining;
-        uint8_t          * copy_pos  = NULL;
-
-        if (head == NULL || src == NULL) {
-                LOG_DBGF("Bogus input, bugging out.");
-                return -EINVAL;
-        }
-
-        if (len == 0) {
-                LOG_DBGF("Nothing to copy.");
-                return 0;
-        }
-
-        buf_start = buffer_seek(head, pos);
-        buf_end   = buffer_seek(head, pos + len - 1);
-
-        if (buf_start == NULL || buf_end == NULL) {
-                LOG_DBGF("Index out of bounds %lu, %lu", pos, pos + len);
-                return -EINVAL;
-        }
-
-        ptr_start = buffer_seek_pos(head, pos);
-
-        if (buf_start == buf_end) {
-                memcpy(ptr_start, src, len);
-                return 0;
-        }
-
-        copy_pos = (uint8_t *)src;
-        bytes_remaining = len;
-        list_for_each(ptr, &(head->list)) {
-                struct buffer * tmp = list_entry(ptr, struct buffer, list);
-                if (tmp != buf_start)
-                        continue;
-
-                space_in_buf = (tmp->data + tmp->size) - ptr_start;
-                if (space_in_buf >= bytes_remaining) {
-                        memcpy(ptr_start, copy_pos, bytes_remaining);
-                        return 0;
-                }
-                else
-                        memcpy(ptr_start, copy_pos, space_in_buf);
-                bytes_remaining -= space_in_buf;
-                copy_pos += space_in_buf;
-        }
-
-        return 0;
-}
-
-du_buff_t * du_buff_create(size_t size)
-{
-        du_buff_t * dub = malloc(sizeof *dub);
-
-        if (dub == NULL) {
-                LOG_DBGF("Bogus input, bugging out.");
-                return NULL;
-        }
-
-        dub->buffer  = NULL;
-        dub->size    = size;
-        dub->du_head = 0;
-        dub->du_tail = 0;
-
-        return dub;
-}
-
-void du_buff_destroy(du_buff_t * dub)
-{
-        if (dub == NULL) {
-                LOG_DBGF("Bogus input, bugging out.");
-                return;
-        }
-        buffer_destroy_list(dub->buffer);
-        free (dub);
-}
-
-int du_buff_init(du_buff_t * dub,
-                 size_t      start,
-                 uint8_t   * data,
-                 size_t      len)
-{
-        if (dub == NULL || data == NULL) {
-                LOG_DBGF("Bogus input, bugging out.");
-                return -EINVAL;
-        }
-
-        if (start >= dub->size) {
-                LOG_DBGF("Index out of bounds %lu.", start);
-                return -EINVAL;
-        }
-
-        if (start + len > dub->size) {
-                LOG_DBGF("Buffer too small for data.");
-                return -EINVAL;
-        }
-
-        dub->buffer = buffer_create(dub->size, start, len);
-        if (dub->buffer == NULL)
-                return -ENOMEM;
-
-        dub->du_head = start;
-        dub->du_tail = start + len;
-
-        return buffer_copy_data(dub->buffer, start, data, len);
-}
-
-uint8_t * du_buff_head_alloc(du_buff_t * dub, size_t size)
-{
-        if (dub == NULL) {
-                LOG_DBGF("Bogus input, bugging out.");
-                return NULL;
-        }
-
-        if ((long) (dub->du_head - size) < 0) {
-                LOG_WARN("Failed to allocate PCI headspace.");
-                return NULL;
-        }
-
-        dub->du_head -= size;
-
-        return (buffer_seek_pos(dub->buffer, dub->du_head));
-}
-
-uint8_t * du_buff_tail_alloc(du_buff_t * dub, size_t size)
-{
-        if (dub == NULL) {
-                LOG_DBGF("Bogus input, bugging out.");
-                return NULL;
-        }
-
-        if (dub->du_tail + size >= dub->size) {
-                LOG_WARN("Failed to allocate PCI tailspace.");
-                return NULL;
-        }
-
-        dub->du_tail += size;
-
-        return (buffer_seek_pos(dub->buffer, dub->du_tail));
-}
-
-int du_buff_head_release(du_buff_t * dub, size_t size)
-{
-        if (dub == NULL) {
-                LOG_DBGF("Bogus input, bugging out.");
-                return -EINVAL;
-        }
-
-        if (size > dub->du_tail - dub->du_head) {
-                LOG_WARN("Tried to release beyond sdu boundary.");
-                return -EOVERFLOW;
-        }
-
-        dub->du_head += size;
-
-        /* FIXME: copy some random crap to the buffer for security */
-
-        return 0;
-}
-
-int du_buff_tail_release(du_buff_t * dub, size_t size)
-{
-        if (dub == NULL) {
-                LOG_DBGF("Bogus input, bugging out.");
-                return -EINVAL;
-        }
-
-        if (size > dub->du_tail - dub->du_head) {
-                LOG_WARN("Tried to release beyond sdu boundary.");
-                return -EOVERFLOW;
-        }
-
-        dub->du_tail -= size;
-
-        /* FIXME: copy some random crap to the buffer for security */
-
-        return 0;
-}