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-rw-r--r--src/buffer.h95
-rw-r--r--src/fastd.h45
2 files changed, 96 insertions, 44 deletions
diff --git a/src/buffer.h b/src/buffer.h
new file mode 100644
index 0000000..5ac9664
--- /dev/null
+++ b/src/buffer.h
@@ -0,0 +1,95 @@
+/*
+ Copyright (c) 2012-2013, Matthias Schiffer <mschiffer@universe-factory.net>
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+ this list of conditions and the following disclaimer in the documentation
+ and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#ifndef _FASTD_BUFFER_H_
+#define _FASTD_BUFFER_H_
+
+#include "log.h"
+
+
+struct fastd_buffer {
+ void *base;
+ size_t base_len;
+
+ void *data;
+ size_t len;
+};
+
+
+static inline fastd_buffer_t fastd_buffer_alloc(const fastd_context_t *ctx, size_t len, size_t head_space, size_t tail_space) {
+ size_t base_len = head_space+len+tail_space;
+ void *ptr;
+ int err = posix_memalign(&ptr, 16, base_len);
+ if (err)
+ exit_error(ctx, "posix_memalign: %s", strerror(err));
+
+ return (fastd_buffer_t){ .base = ptr, .base_len = base_len, .data = ptr+head_space, .len = len };
+}
+
+static inline fastd_buffer_t fastd_buffer_dup(const fastd_context_t *ctx, fastd_buffer_t buffer, size_t head_space, size_t tail_space) {
+ fastd_buffer_t new_buffer = fastd_buffer_alloc(ctx, buffer.len, head_space, tail_space);
+ memcpy(new_buffer.data, buffer.data, buffer.len);
+ return new_buffer;
+}
+
+static inline void fastd_buffer_free(fastd_buffer_t buffer) {
+ free(buffer.base);
+}
+
+
+static inline void fastd_buffer_pull_head(const fastd_context_t *ctx, fastd_buffer_t *buffer, size_t len) {
+ if (len > (size_t)(buffer->data - buffer->base))
+ exit_bug(ctx, "tried to pull buffer across base");
+
+ buffer->data -= len;
+ buffer->len += len;
+}
+
+static inline void fastd_buffer_pull_head_zero(const fastd_context_t *ctx, fastd_buffer_t *buffer, size_t len) {
+ fastd_buffer_pull_head(ctx, buffer, len);
+ memset(buffer->data, 0, len);
+}
+
+static inline void fastd_buffer_pull_head_from(const fastd_context_t *ctx, fastd_buffer_t *buffer, const void *data, size_t len) {
+ fastd_buffer_pull_head(ctx, buffer, len);
+ memcpy(buffer->data, data, len);
+}
+
+
+static inline void fastd_buffer_push_head(const fastd_context_t *ctx, fastd_buffer_t *buffer, size_t len) {
+ if (buffer->len < len)
+ exit_bug(ctx, "tried to push buffer across tail");
+
+ buffer->data += len;
+ buffer->len -= len;
+}
+
+static inline void fastd_buffer_push_head_to(const fastd_context_t *ctx, fastd_buffer_t *buffer, void *data, size_t len) {
+ memcpy(data, buffer->data, len);
+ fastd_buffer_push_head(ctx, buffer, len);
+}
+
+#endif /* _FASTD_BUFFER_H_ */
diff --git a/src/fastd.h b/src/fastd.h
index 3df0ad1..76a71da 100644
--- a/src/fastd.h
+++ b/src/fastd.h
@@ -30,6 +30,7 @@
#include "compat.h"
#include "types.h"
#include "dlist.h"
+#include "buffer.h"
#include "log.h"
#include <errno.h>
@@ -43,14 +44,6 @@
#include <sys/uio.h>
-struct fastd_buffer {
- void *base;
- size_t base_len;
-
- void *data;
- size_t len;
-};
-
struct __attribute__((__packed__)) fastd_eth_addr {
uint8_t data[ETH_ALEN];
};
@@ -346,42 +339,6 @@ static inline size_t alignto(size_t l, size_t a) {
}
-static inline fastd_buffer_t fastd_buffer_alloc(const fastd_context_t *ctx, size_t len, size_t head_space, size_t tail_space) {
- size_t base_len = head_space+len+tail_space;
- void *ptr;
- int err = posix_memalign(&ptr, 16, base_len);
- if (err)
- exit_error(ctx, "posix_memalign: %s", strerror(err));
-
- return (fastd_buffer_t){ .base = ptr, .base_len = base_len, .data = ptr+head_space, .len = len };
-}
-
-static inline fastd_buffer_t fastd_buffer_dup(const fastd_context_t *ctx, fastd_buffer_t buffer, size_t head_space, size_t tail_space) {
- fastd_buffer_t new_buffer = fastd_buffer_alloc(ctx, buffer.len, head_space, tail_space);
- memcpy(new_buffer.data, buffer.data, buffer.len);
- return new_buffer;
-}
-
-static inline void fastd_buffer_free(fastd_buffer_t buffer) {
- free(buffer.base);
-}
-
-static inline void fastd_buffer_pull_head(const fastd_context_t *ctx, fastd_buffer_t *buffer, size_t len) {
- buffer->data -= len;
- buffer->len += len;
-
- if (buffer->data < buffer->base)
- exit_bug(ctx, "tried to pull buffer across head");
-}
-
-static inline void fastd_buffer_push_head(const fastd_context_t *ctx, fastd_buffer_t *buffer, size_t len) {
- if (buffer->len < len)
- exit_bug(ctx, "tried to push buffer across tail");
-
- buffer->data += len;
- buffer->len -= len;
-}
-
static inline size_t fastd_max_inner_packet(const fastd_context_t *ctx) {
switch (ctx->conf->mode) {
case MODE_TAP: