760 lines
18 KiB
C
760 lines
18 KiB
C
/*
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* Copyright (c) 2015 Intel Corporation
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* Additional Copyright (c) 2018 Espressif Systems (Shanghai) PTE LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <string.h>
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#include "mesh_common.h"
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int net_buf_id(struct net_buf *buf)
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{
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struct net_buf_pool *pool = buf->pool;
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return buf - pool->__bufs;
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}
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static inline struct net_buf *pool_get_uninit(struct net_buf_pool *pool,
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u16_t uninit_count)
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{
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struct net_buf *buf = NULL;
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buf = &pool->__bufs[pool->buf_count - uninit_count];
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buf->pool = pool;
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return buf;
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}
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void net_buf_simple_clone(const struct net_buf_simple *original,
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struct net_buf_simple *clone)
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{
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memcpy(clone, original, sizeof(struct net_buf_simple));
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}
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void *net_buf_simple_add(struct net_buf_simple *buf, size_t len)
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{
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u8_t *tail = net_buf_simple_tail(buf);
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NET_BUF_SIMPLE_DBG("buf %p len %u", buf, len);
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NET_BUF_SIMPLE_ASSERT(net_buf_simple_tailroom(buf) >= len);
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buf->len += len;
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return tail;
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}
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void *net_buf_simple_add_mem(struct net_buf_simple *buf, const void *mem,
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size_t len)
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{
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NET_BUF_SIMPLE_DBG("buf %p len %u", buf, len);
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return memcpy(net_buf_simple_add(buf, len), mem, len);
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}
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u8_t *net_buf_simple_add_u8(struct net_buf_simple *buf, u8_t val)
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{
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u8_t *u8 = NULL;
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NET_BUF_SIMPLE_DBG("buf %p val 0x%02x", buf, val);
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u8 = net_buf_simple_add(buf, 1);
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*u8 = val;
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return u8;
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}
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void net_buf_simple_add_le16(struct net_buf_simple *buf, u16_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %u", buf, val);
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sys_put_le16(val, net_buf_simple_add(buf, sizeof(val)));
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}
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void net_buf_simple_add_be16(struct net_buf_simple *buf, u16_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %u", buf, val);
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sys_put_be16(val, net_buf_simple_add(buf, sizeof(val)));
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}
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void net_buf_simple_add_le24(struct net_buf_simple *buf, u32_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %u", buf, val);
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sys_put_le24(val, net_buf_simple_add(buf, 3));
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}
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void net_buf_simple_add_be24(struct net_buf_simple *buf, u32_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %u", buf, val);
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sys_put_be24(val, net_buf_simple_add(buf, 3));
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}
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void net_buf_simple_add_le32(struct net_buf_simple *buf, u32_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %u", buf, val);
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sys_put_le32(val, net_buf_simple_add(buf, sizeof(val)));
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}
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void net_buf_simple_add_be32(struct net_buf_simple *buf, u32_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %u", buf, val);
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sys_put_be32(val, net_buf_simple_add(buf, sizeof(val)));
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}
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void net_buf_simple_add_le48(struct net_buf_simple *buf, u64_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %" PRIu64, buf, val);
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sys_put_le48(val, net_buf_simple_add(buf, 6));
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}
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void net_buf_simple_add_be48(struct net_buf_simple *buf, u64_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %" PRIu64, buf, val);
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sys_put_be48(val, net_buf_simple_add(buf, 6));
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}
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void net_buf_simple_add_le64(struct net_buf_simple *buf, u64_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %" PRIu64, buf, val);
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sys_put_le64(val, net_buf_simple_add(buf, sizeof(val)));
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}
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void net_buf_simple_add_be64(struct net_buf_simple *buf, u64_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %" PRIu64, buf, val);
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sys_put_be64(val, net_buf_simple_add(buf, sizeof(val)));
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}
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void *net_buf_simple_push(struct net_buf_simple *buf, size_t len)
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{
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NET_BUF_SIMPLE_DBG("buf %p len %u", buf, len);
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NET_BUF_SIMPLE_ASSERT(net_buf_simple_headroom(buf) >= len);
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buf->data -= len;
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buf->len += len;
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return buf->data;
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}
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void net_buf_simple_push_le16(struct net_buf_simple *buf, u16_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %u", buf, val);
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sys_put_le16(val, net_buf_simple_push(buf, sizeof(val)));
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}
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void net_buf_simple_push_be16(struct net_buf_simple *buf, u16_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %u", buf, val);
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sys_put_be16(val, net_buf_simple_push(buf, sizeof(val)));
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}
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void net_buf_simple_push_u8(struct net_buf_simple *buf, u8_t val)
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{
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u8_t *data = net_buf_simple_push(buf, 1);
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*data = val;
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}
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void net_buf_simple_push_le24(struct net_buf_simple *buf, u32_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %u", buf, val);
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sys_put_le24(val, net_buf_simple_push(buf, 3));
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}
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void net_buf_simple_push_be24(struct net_buf_simple *buf, u32_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %u", buf, val);
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sys_put_be24(val, net_buf_simple_push(buf, 3));
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}
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void net_buf_simple_push_le32(struct net_buf_simple *buf, u32_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %u", buf, val);
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sys_put_le32(val, net_buf_simple_push(buf, sizeof(val)));
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}
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void net_buf_simple_push_be32(struct net_buf_simple *buf, u32_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %u", buf, val);
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sys_put_be32(val, net_buf_simple_push(buf, sizeof(val)));
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}
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void net_buf_simple_push_le48(struct net_buf_simple *buf, u64_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %" PRIu64, buf, val);
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sys_put_le48(val, net_buf_simple_push(buf, 6));
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}
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void net_buf_simple_push_be48(struct net_buf_simple *buf, u64_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %" PRIu64, buf, val);
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sys_put_be48(val, net_buf_simple_push(buf, 6));
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}
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void net_buf_simple_push_le64(struct net_buf_simple *buf, u64_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %" PRIu64, buf, val);
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sys_put_le64(val, net_buf_simple_push(buf, sizeof(val)));
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}
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void net_buf_simple_push_be64(struct net_buf_simple *buf, u64_t val)
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{
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NET_BUF_SIMPLE_DBG("buf %p val %" PRIu64, buf, val);
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sys_put_be64(val, net_buf_simple_push(buf, sizeof(val)));
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}
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void *net_buf_simple_pull(struct net_buf_simple *buf, size_t len)
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{
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NET_BUF_SIMPLE_DBG("buf %p len %u", buf, len);
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NET_BUF_SIMPLE_ASSERT(buf->len >= len);
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buf->len -= len;
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return buf->data += len;
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}
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void *net_buf_simple_pull_mem(struct net_buf_simple *buf, size_t len)
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{
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void *data = buf->data;
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NET_BUF_SIMPLE_DBG("buf %p len %zu", buf, len);
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NET_BUF_SIMPLE_ASSERT(buf->len >= len);
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buf->len -= len;
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buf->data += len;
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return data;
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}
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u8_t net_buf_simple_pull_u8(struct net_buf_simple *buf)
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{
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u8_t val = 0U;
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val = buf->data[0];
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net_buf_simple_pull(buf, 1);
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return val;
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}
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u16_t net_buf_simple_pull_le16(struct net_buf_simple *buf)
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{
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u16_t val = 0U;
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val = UNALIGNED_GET((u16_t *)buf->data);
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net_buf_simple_pull(buf, sizeof(val));
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return sys_le16_to_cpu(val);
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}
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u16_t net_buf_simple_pull_be16(struct net_buf_simple *buf)
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{
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u16_t val = 0U;
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val = UNALIGNED_GET((u16_t *)buf->data);
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net_buf_simple_pull(buf, sizeof(val));
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return sys_be16_to_cpu(val);
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}
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u32_t net_buf_simple_pull_le24(struct net_buf_simple *buf)
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{
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struct uint24 {
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u32_t u24:24;
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} __packed val;
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val = UNALIGNED_GET((struct uint24 *)buf->data);
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net_buf_simple_pull(buf, sizeof(val));
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return sys_le24_to_cpu(val.u24);
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}
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u32_t net_buf_simple_pull_be24(struct net_buf_simple *buf)
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{
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struct uint24 {
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u32_t u24:24;
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} __packed val;
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val = UNALIGNED_GET((struct uint24 *)buf->data);
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net_buf_simple_pull(buf, sizeof(val));
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return sys_be24_to_cpu(val.u24);
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}
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u32_t net_buf_simple_pull_le32(struct net_buf_simple *buf)
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{
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u32_t val = 0U;
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val = UNALIGNED_GET((u32_t *)buf->data);
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net_buf_simple_pull(buf, sizeof(val));
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return sys_le32_to_cpu(val);
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}
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u32_t net_buf_simple_pull_be32(struct net_buf_simple *buf)
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{
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u32_t val = 0U;
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val = UNALIGNED_GET((u32_t *)buf->data);
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net_buf_simple_pull(buf, sizeof(val));
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return sys_be32_to_cpu(val);
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}
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u64_t net_buf_simple_pull_le48(struct net_buf_simple *buf)
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{
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struct uint48 {
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u64_t u48:48;
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} __packed val;
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val = UNALIGNED_GET((struct uint48 *)buf->data);
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net_buf_simple_pull(buf, sizeof(val));
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return sys_le48_to_cpu(val.u48);
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}
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u64_t net_buf_simple_pull_be48(struct net_buf_simple *buf)
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{
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struct uint48 {
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u64_t u48:48;
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} __packed val;
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val = UNALIGNED_GET((struct uint48 *)buf->data);
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net_buf_simple_pull(buf, sizeof(val));
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return sys_be48_to_cpu(val.u48);
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}
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u64_t net_buf_simple_pull_le64(struct net_buf_simple *buf)
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{
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u64_t val;
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val = UNALIGNED_GET((u64_t *)buf->data);
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net_buf_simple_pull(buf, sizeof(val));
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return sys_le64_to_cpu(val);
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}
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u64_t net_buf_simple_pull_be64(struct net_buf_simple *buf)
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{
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u64_t val;
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val = UNALIGNED_GET((u64_t *)buf->data);
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net_buf_simple_pull(buf, sizeof(val));
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return sys_be64_to_cpu(val);
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}
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size_t net_buf_simple_headroom(struct net_buf_simple *buf)
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{
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return buf->data - buf->__buf;
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}
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size_t net_buf_simple_tailroom(struct net_buf_simple *buf)
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{
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return buf->size - net_buf_simple_headroom(buf) - buf->len;
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}
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void net_buf_reset(struct net_buf *buf)
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{
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NET_BUF_ASSERT(buf->flags == 0);
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NET_BUF_ASSERT(buf->frags == NULL);
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net_buf_simple_reset(&buf->b);
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}
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void net_buf_simple_init_with_data(struct net_buf_simple *buf,
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void *data, size_t size)
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{
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buf->__buf = data;
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buf->data = data;
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buf->size = size;
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buf->len = size;
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}
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void net_buf_simple_reserve(struct net_buf_simple *buf, size_t reserve)
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{
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NET_BUF_ASSERT(buf);
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NET_BUF_ASSERT(buf->len == 0U);
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NET_BUF_DBG("buf %p reserve %zu", buf, reserve);
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buf->data = buf->__buf + reserve;
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}
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void net_buf_slist_put(sys_slist_t *list, struct net_buf *buf)
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{
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struct net_buf *tail = NULL;
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NET_BUF_ASSERT(list);
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NET_BUF_ASSERT(buf);
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for (tail = buf; tail->frags; tail = tail->frags) {
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tail->flags |= NET_BUF_FRAGS;
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}
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bt_mesh_list_lock();
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sys_slist_append_list(list, &buf->node, &tail->node);
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bt_mesh_list_unlock();
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}
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struct net_buf *net_buf_slist_get(sys_slist_t *list)
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{
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struct net_buf *buf = NULL, *frag = NULL;
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NET_BUF_ASSERT(list);
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bt_mesh_list_lock();
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buf = (void *)sys_slist_get(list);
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bt_mesh_list_unlock();
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if (!buf) {
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return NULL;
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}
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/* Get any fragments belonging to this buffer */
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for (frag = buf; (frag->flags & NET_BUF_FRAGS); frag = frag->frags) {
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bt_mesh_list_lock();
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frag->frags = (void *)sys_slist_get(list);
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bt_mesh_list_unlock();
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NET_BUF_ASSERT(frag->frags);
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/* The fragments flag is only for list-internal usage */
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frag->flags &= ~NET_BUF_FRAGS;
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}
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/* Mark the end of the fragment list */
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frag->frags = NULL;
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return buf;
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}
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struct net_buf *net_buf_ref(struct net_buf *buf)
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{
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NET_BUF_ASSERT(buf);
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NET_BUF_DBG("buf %p (old) ref %u pool %p", buf, buf->ref, buf->pool);
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buf->ref++;
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return buf;
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}
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#if defined(CONFIG_BLE_MESH_NET_BUF_LOG)
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void net_buf_unref_debug(struct net_buf *buf, const char *func, int line)
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#else
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void net_buf_unref(struct net_buf *buf)
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#endif
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{
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NET_BUF_ASSERT(buf);
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while (buf) {
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struct net_buf *frags = buf->frags;
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struct net_buf_pool *pool = NULL;
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#if defined(CONFIG_BLE_MESH_NET_BUF_LOG)
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if (!buf->ref) {
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NET_BUF_ERR("%s():%d: buf %p double free", func, line,
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buf);
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return;
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}
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#endif
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NET_BUF_DBG("buf %p ref %u pool %p frags %p", buf, buf->ref,
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buf->pool, buf->frags);
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/* Changed by Espressif. Add !buf->ref to avoid minus 0 */
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if (!buf->ref || --buf->ref > 0) {
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return;
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}
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buf->frags = NULL;
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pool = buf->pool;
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pool->uninit_count++;
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#if defined(CONFIG_BLE_MESH_NET_BUF_POOL_USAGE)
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pool->avail_count++;
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NET_BUF_DBG("Unref, pool %p, avail_count %d, uninit_count %d",
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pool, pool->avail_count, pool->uninit_count);
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NET_BUF_ASSERT(pool->avail_count <= pool->buf_count);
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#endif
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if (pool->destroy) {
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pool->destroy(buf);
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}
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buf = frags;
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}
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}
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static u8_t *fixed_data_alloc(struct net_buf *buf, size_t *size, s32_t timeout)
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{
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struct net_buf_pool *pool = buf->pool;
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const struct net_buf_pool_fixed *fixed = pool->alloc->alloc_data;
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*size = MIN(fixed->data_size, *size);
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return fixed->data_pool + fixed->data_size * net_buf_id(buf);
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}
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static void fixed_data_unref(struct net_buf *buf, u8_t *data)
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{
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/* Nothing needed for fixed-size data pools */
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}
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const struct net_buf_data_cb net_buf_fixed_cb = {
|
|
.alloc = fixed_data_alloc,
|
|
.unref = fixed_data_unref,
|
|
};
|
|
|
|
static u8_t *data_alloc(struct net_buf *buf, size_t *size, s32_t timeout)
|
|
{
|
|
struct net_buf_pool *pool = buf->pool;
|
|
|
|
return pool->alloc->cb->alloc(buf, size, timeout);
|
|
}
|
|
|
|
#if defined(CONFIG_BLE_MESH_NET_BUF_LOG)
|
|
struct net_buf *net_buf_alloc_len_debug(struct net_buf_pool *pool, size_t size,
|
|
s32_t timeout, const char *func, int line)
|
|
#else
|
|
struct net_buf *net_buf_alloc_len(struct net_buf_pool *pool, size_t size,
|
|
s32_t timeout)
|
|
#endif
|
|
{
|
|
struct net_buf *buf = NULL;
|
|
int i;
|
|
|
|
NET_BUF_ASSERT(pool);
|
|
|
|
NET_BUF_DBG("Alloc, pool %p, uninit_count %d, buf_count %d",
|
|
pool, pool->uninit_count, pool->buf_count);
|
|
|
|
/* We need to lock interrupts temporarily to prevent race conditions
|
|
* when accessing pool->uninit_count.
|
|
*/
|
|
bt_mesh_buf_lock();
|
|
|
|
/* If there are uninitialized buffers we're guaranteed to succeed
|
|
* with the allocation one way or another.
|
|
*/
|
|
if (pool->uninit_count) {
|
|
/* Changed by Espressif. Use buf when buf->ref is 0 */
|
|
for (i = pool->buf_count; i > 0; i--) {
|
|
buf = pool_get_uninit(pool, i);
|
|
if (!buf->ref) {
|
|
bt_mesh_buf_unlock();
|
|
goto success;
|
|
}
|
|
}
|
|
}
|
|
|
|
bt_mesh_buf_unlock();
|
|
|
|
NET_BUF_ERR("Out of free buffer, pool %p", pool);
|
|
return NULL;
|
|
|
|
success:
|
|
NET_BUF_DBG("allocated buf %p", buf);
|
|
|
|
if (size) {
|
|
buf->__buf = data_alloc(buf, &size, timeout);
|
|
if (!buf->__buf) {
|
|
NET_BUF_ERR("Out of data, buf %p", buf);
|
|
return NULL;
|
|
}
|
|
} else {
|
|
NET_BUF_WARN("Zero data size, buf %p", buf);
|
|
buf->__buf = NULL;
|
|
}
|
|
|
|
buf->ref = 1;
|
|
buf->flags = 0;
|
|
buf->frags = NULL;
|
|
buf->size = size;
|
|
net_buf_reset(buf);
|
|
|
|
pool->uninit_count--;
|
|
#if defined(CONFIG_BLE_MESH_NET_BUF_POOL_USAGE)
|
|
pool->avail_count--;
|
|
NET_BUF_ASSERT(pool->avail_count >= 0);
|
|
#endif
|
|
|
|
return buf;
|
|
}
|
|
|
|
#if defined(CONFIG_BLE_MESH_NET_BUF_LOG)
|
|
struct net_buf *net_buf_alloc_fixed_debug(struct net_buf_pool *pool,
|
|
s32_t timeout, const char *func,
|
|
int line)
|
|
{
|
|
const struct net_buf_pool_fixed *fixed = pool->alloc->alloc_data;
|
|
|
|
return net_buf_alloc_len_debug(pool, fixed->data_size, timeout, func, line);
|
|
}
|
|
#else
|
|
struct net_buf *net_buf_alloc_fixed(struct net_buf_pool *pool, s32_t timeout)
|
|
{
|
|
const struct net_buf_pool_fixed *fixed = pool->alloc->alloc_data;
|
|
|
|
return net_buf_alloc_len(pool, fixed->data_size, timeout);
|
|
}
|
|
#endif
|
|
|
|
struct net_buf *net_buf_frag_last(struct net_buf *buf)
|
|
{
|
|
NET_BUF_ASSERT(buf);
|
|
|
|
while (buf->frags) {
|
|
buf = buf->frags;
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
void net_buf_frag_insert(struct net_buf *parent, struct net_buf *frag)
|
|
{
|
|
NET_BUF_ASSERT(parent);
|
|
NET_BUF_ASSERT(frag);
|
|
|
|
if (parent->frags) {
|
|
net_buf_frag_last(frag)->frags = parent->frags;
|
|
}
|
|
/* Take ownership of the fragment reference */
|
|
parent->frags = frag;
|
|
}
|
|
|
|
struct net_buf *net_buf_frag_add(struct net_buf *head, struct net_buf *frag)
|
|
{
|
|
NET_BUF_ASSERT(frag);
|
|
|
|
if (!head) {
|
|
return net_buf_ref(frag);
|
|
}
|
|
|
|
net_buf_frag_insert(net_buf_frag_last(head), frag);
|
|
|
|
return head;
|
|
}
|
|
|
|
#if defined(CONFIG_BLE_MESH_NET_BUF_LOG)
|
|
struct net_buf *net_buf_frag_del_debug(struct net_buf *parent,
|
|
struct net_buf *frag,
|
|
const char *func, int line)
|
|
#else
|
|
struct net_buf *net_buf_frag_del(struct net_buf *parent, struct net_buf *frag)
|
|
#endif
|
|
{
|
|
struct net_buf *next_frag = NULL;
|
|
|
|
NET_BUF_ASSERT(frag);
|
|
|
|
if (parent) {
|
|
NET_BUF_ASSERT(parent->frags);
|
|
NET_BUF_ASSERT(parent->frags == frag);
|
|
parent->frags = frag->frags;
|
|
}
|
|
|
|
next_frag = frag->frags;
|
|
|
|
frag->frags = NULL;
|
|
|
|
#if defined(CONFIG_BLE_MESH_NET_BUF_LOG)
|
|
net_buf_unref_debug(frag, func, line);
|
|
#else
|
|
net_buf_unref(frag);
|
|
#endif
|
|
|
|
return next_frag;
|
|
}
|
|
|
|
size_t net_buf_linearize(void *dst, size_t dst_len, struct net_buf *src,
|
|
size_t offset, size_t len)
|
|
{
|
|
struct net_buf *frag = NULL;
|
|
size_t to_copy = 0U;
|
|
size_t copied = 0U;
|
|
|
|
len = MIN(len, dst_len);
|
|
|
|
frag = src;
|
|
|
|
/* find the right fragment to start copying from */
|
|
while (frag && offset >= frag->len) {
|
|
offset -= frag->len;
|
|
frag = frag->frags;
|
|
}
|
|
|
|
/* traverse the fragment chain until len bytes are copied */
|
|
copied = 0;
|
|
while (frag && len > 0) {
|
|
to_copy = MIN(len, frag->len - offset);
|
|
memcpy((u8_t *)dst + copied, frag->data + offset, to_copy);
|
|
|
|
copied += to_copy;
|
|
|
|
/* to_copy is always <= len */
|
|
len -= to_copy;
|
|
frag = frag->frags;
|
|
|
|
/* after the first iteration, this value will be 0 */
|
|
offset = 0;
|
|
}
|
|
|
|
return copied;
|
|
}
|
|
|
|
/* This helper routine will append multiple bytes, if there is no place for
|
|
* the data in current fragment then create new fragment and add it to
|
|
* the buffer. It assumes that the buffer has at least one fragment.
|
|
*/
|
|
size_t net_buf_append_bytes(struct net_buf *buf, size_t len,
|
|
const void *value, s32_t timeout,
|
|
net_buf_allocator_cb allocate_cb, void *user_data)
|
|
{
|
|
struct net_buf *frag = net_buf_frag_last(buf);
|
|
size_t added_len = 0U;
|
|
const u8_t *value8 = value;
|
|
|
|
do {
|
|
u16_t count = MIN(len, net_buf_tailroom(frag));
|
|
|
|
net_buf_add_mem(frag, value8, count);
|
|
len -= count;
|
|
added_len += count;
|
|
value8 += count;
|
|
|
|
if (len == 0) {
|
|
return added_len;
|
|
}
|
|
|
|
frag = allocate_cb(timeout, user_data);
|
|
if (!frag) {
|
|
return added_len;
|
|
}
|
|
|
|
net_buf_frag_add(buf, frag);
|
|
} while (1);
|
|
|
|
/* Unreachable */
|
|
return 0;
|
|
} |