eng33
117 lines
3.8 KiB
C
117 lines
3.8 KiB
C
/*
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* Copyright (c) Hisilicon Technologies Co., Ltd. 2020-2020. All rights reserved.
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* Description: oal_netbuff.c.
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* Author: Hisilicon
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* Create: 2020-08-04
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*/
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/*****************************************************************************
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1 头文件包含
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*****************************************************************************/
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#include "oal_netbuf.h"
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#include "oam_ext_if.h"
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#include "oal_util.h"
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#ifdef __cplusplus
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#if __cplusplus
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extern "C" {
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#endif
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#endif
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/*****************************************************************************
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3 函数实现
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*****************************************************************************/
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/*****************************************************************************
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功能描述 : 向netbu_head的尾部串接netbuf
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*****************************************************************************/
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hi_u32 oal_netbuf_concat(oal_netbuf_stru* netbuf_head, oal_netbuf_stru* netbuf)
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{
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/* 判断空间是否足够 */
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if (((hi_u32)netbuf_head->end - (hi_u32)netbuf_head->tail) < netbuf->len) {
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oal_netbuf_free(netbuf);
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oam_error_log3("oal_netbuf_concat::no enough space: end:%d, tail:%d, len:%d.",
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netbuf_head->end, netbuf_head->tail, netbuf->len);
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return HI_FAIL;
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}
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if (memcpy_s(skb_tail_pointer(netbuf_head), netbuf->len, netbuf->data, netbuf->len) != EOK) {
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oam_error_log0("oal_netbuf_concat:: memcpy_s failed");
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oal_netbuf_free(netbuf);
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return HI_FAIL;
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}
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skb_put(netbuf_head, netbuf->len);
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oal_netbuf_free(netbuf);
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return HI_SUCCESS;
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}
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/*****************************************************************************
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功能描述 : 判断ipv4 tcp报文是否为tcp ack
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*****************************************************************************/
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hi_u8 oal_netbuf_is_tcp_ack(oal_ip_header_stru *ip_hdr)
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{
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oal_tcp_header_stru *tcp_hdr = HI_NULL;
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hi_u32 ip_pkt_len;
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hi_u32 ip_hdr_len;
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hi_u32 tcp_hdr_len;
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tcp_hdr = (oal_tcp_header_stru *)(ip_hdr + 1);
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ip_pkt_len = oal_net2host_short(ip_hdr->us_tot_len);
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ip_hdr_len = (oal_low_half_byte(ip_hdr->us_ihl)) << 2; /* 2: 左移2位 */
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tcp_hdr_len = (oal_high_half_byte(tcp_hdr->offset)) << 2; /* 2: 左移2位 */
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if (tcp_hdr_len + ip_hdr_len == ip_pkt_len) {
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return HI_TRUE;
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}
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return HI_FALSE;
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}
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/*****************************************************************************
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功能描述 : 为netbuf申请内存
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输入参数 : ul_size: 分配内存的大小
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l_reserve: data跟指针头之间要预留的长度
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ul_align: 需要几字节对齐
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返 回 值 : 成功返回结构体指针；失败返回OAL_PTR_NULL
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*****************************************************************************/
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oal_netbuf_stru* oal_netbuf_alloc(hi_u32 ul_size, hi_u32 l_reserve, hi_u32 l_align)
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{
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oal_netbuf_stru *pst_netbuf = HI_NULL;
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hi_u32 ul_offset;
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/* 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 */
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if (l_align) {
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ul_size += (l_align - 1);
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}
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if (NET_SKB_PAD < 64) { /* net skb pad less than 64 */
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pst_netbuf = dev_alloc_skb(ul_size + 32); /* 预留32字节给头部使其满足需求 */
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} else {
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pst_netbuf = dev_alloc_skb(ul_size);
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}
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if (oal_unlikely(pst_netbuf == HI_NULL)) {
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return HI_NULL;
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}
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if (NET_SKB_PAD < 64) { /* net skb pad less than 64 */
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skb_reserve(pst_netbuf, l_reserve + 32); /* 预留32字节给头部使其满足需求 */
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} else {
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skb_reserve(pst_netbuf, l_reserve);
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}
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if (l_align) {
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/* 计算为了能使4字节对齐的偏移量 */
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ul_offset = (hi_u32)(((unsigned long)pst_netbuf->data) % (unsigned long)l_align);
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if (ul_offset) {
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skb_reserve(pst_netbuf, l_align - ul_offset);
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}
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}
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return pst_netbuf;
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}
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#ifdef __cplusplus
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#if __cplusplus
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}
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#endif
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#endif
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