117 lines
3.8 KiB
C
117 lines
3.8 KiB
C
/*
|
||
* Copyright (c) Hisilicon Technologies Co., Ltd. 2020-2020. All rights reserved.
|
||
* Description: oal_netbuff.c.
|
||
* Author: Hisilicon
|
||
* Create: 2020-08-04
|
||
*/
|
||
/*****************************************************************************
|
||
1 头文件包含
|
||
*****************************************************************************/
|
||
#include "oal_netbuf.h"
|
||
#include "oam_ext_if.h"
|
||
#include "oal_util.h"
|
||
|
||
#ifdef __cplusplus
|
||
#if __cplusplus
|
||
extern "C" {
|
||
#endif
|
||
#endif
|
||
|
||
/*****************************************************************************
|
||
3 函数实现
|
||
*****************************************************************************/
|
||
/*****************************************************************************
|
||
功能描述 : 向netbu_head的尾部串接netbuf
|
||
*****************************************************************************/
|
||
hi_u32 oal_netbuf_concat(oal_netbuf_stru* netbuf_head, oal_netbuf_stru* netbuf)
|
||
{
|
||
/* 判断空间是否足够 */
|
||
if (((hi_u32)netbuf_head->end - (hi_u32)netbuf_head->tail) < netbuf->len) {
|
||
oal_netbuf_free(netbuf);
|
||
oam_error_log3("oal_netbuf_concat::no enough space: end:%d, tail:%d, len:%d.",
|
||
netbuf_head->end, netbuf_head->tail, netbuf->len);
|
||
return HI_FAIL;
|
||
}
|
||
if (memcpy_s(skb_tail_pointer(netbuf_head), netbuf->len, netbuf->data, netbuf->len) != EOK) {
|
||
oam_error_log0("oal_netbuf_concat:: memcpy_s failed");
|
||
oal_netbuf_free(netbuf);
|
||
return HI_FAIL;
|
||
}
|
||
|
||
skb_put(netbuf_head, netbuf->len);
|
||
oal_netbuf_free(netbuf);
|
||
return HI_SUCCESS;
|
||
}
|
||
|
||
/*****************************************************************************
|
||
功能描述 : 判断ipv4 tcp报文是否为tcp ack
|
||
*****************************************************************************/
|
||
hi_u8 oal_netbuf_is_tcp_ack(oal_ip_header_stru *ip_hdr)
|
||
{
|
||
oal_tcp_header_stru *tcp_hdr = HI_NULL;
|
||
hi_u32 ip_pkt_len;
|
||
hi_u32 ip_hdr_len;
|
||
hi_u32 tcp_hdr_len;
|
||
|
||
tcp_hdr = (oal_tcp_header_stru *)(ip_hdr + 1);
|
||
ip_pkt_len = oal_net2host_short(ip_hdr->us_tot_len);
|
||
ip_hdr_len = (oal_low_half_byte(ip_hdr->us_ihl)) << 2; /* 2: 左移2位 */
|
||
tcp_hdr_len = (oal_high_half_byte(tcp_hdr->offset)) << 2; /* 2: 左移2位 */
|
||
if (tcp_hdr_len + ip_hdr_len == ip_pkt_len) {
|
||
return HI_TRUE;
|
||
}
|
||
|
||
return HI_FALSE;
|
||
}
|
||
|
||
/*****************************************************************************
|
||
功能描述 : 为netbuf申请内存
|
||
输入参数 : ul_size: 分配内存的大小
|
||
l_reserve: data跟指针头之间要预留的长度
|
||
ul_align: 需要几字节对齐
|
||
返 回 值 : 成功返回结构体指针；失败返回OAL_PTR_NULL
|
||
*****************************************************************************/
|
||
oal_netbuf_stru* oal_netbuf_alloc(hi_u32 ul_size, hi_u32 l_reserve, hi_u32 l_align)
|
||
{
|
||
oal_netbuf_stru *pst_netbuf = HI_NULL;
|
||
hi_u32 ul_offset;
|
||
|
||
/* 保证data部分的size不会再字节对齐后小于预先想分配的大小 */
|
||
if (l_align) {
|
||
ul_size += (l_align - 1);
|
||
}
|
||
|
||
if (NET_SKB_PAD < 64) { /* net skb pad less than 64 */
|
||
pst_netbuf = dev_alloc_skb(ul_size + 32); /* 预留32字节给头部使其满足需求 */
|
||
} else {
|
||
pst_netbuf = dev_alloc_skb(ul_size);
|
||
}
|
||
|
||
if (oal_unlikely(pst_netbuf == HI_NULL)) {
|
||
return HI_NULL;
|
||
}
|
||
|
||
if (NET_SKB_PAD < 64) { /* net skb pad less than 64 */
|
||
skb_reserve(pst_netbuf, l_reserve + 32); /* 预留32字节给头部使其满足需求 */
|
||
} else {
|
||
skb_reserve(pst_netbuf, l_reserve);
|
||
}
|
||
|
||
if (l_align) {
|
||
/* 计算为了能使4字节对齐的偏移量 */
|
||
ul_offset = (hi_u32)(((unsigned long)pst_netbuf->data) % (unsigned long)l_align);
|
||
if (ul_offset) {
|
||
skb_reserve(pst_netbuf, l_align - ul_offset);
|
||
}
|
||
}
|
||
|
||
return pst_netbuf;
|
||
}
|
||
|
||
#ifdef __cplusplus
|
||
#if __cplusplus
|
||
}
|
||
#endif
|
||
#endif
|
||
|