if (PACKET_TEST_ACTION(p, ACTION_REJECT)) { r = RejectSendLibnet11L3IPv4TCP(tv, p, data, REJECT_DIR_SRC); SCReturnInt(r); } else if (PACKET_TEST_ACTION(p, ACTION_REJECT_DST)) { r = RejectSendLibnet11L3IPv4TCP(tv, p, data, REJECT_DIR_DST); SCReturnInt(r); } else if(PACKET_TEST_ACTION(p, ACTION_REJECT_BOTH)) {

这段代码看起来像是一个网络安全相关的程序，它检测了包（packet）中是否包含了拒绝（reject）的动作（action），如果包含了，就会调用RejectSendLibnet11L3IPv4TCP函数，传入tv、p、data和REJECT_DIR_SRC或REJECT_DIR_DST参数（具体传入哪个参数取决于ACTION_REJECT和ACTION_REJECT_DST的值）。最后，它还检测了是否同时包含了ACTION_REJECT和ACTION_REJECT_DST，如果是的话，也会调用RejectSendLibnet11L3IPv4TCP函数，传入tv、p、data和REJECT_DIR_BOTH参数。

相关问题

module data_packetizer ( input clk, input rst, input [15:0] data_in, output reg tx_wire, output reg ready ); reg [1:0] state = 2'b00; reg [35:0] packet_out; reg parity; always @(posedge clk) begin if (rst) begin state <= 2'b00; ready <= 0; packet_out <= 36'h000000; end else begin case(state) 2'b00: begin ready <= 0; if (data_in != 0) begin state <= 2'b01; end end 2'b01: begin packet_out[32:17] <= data_in; state <= 2'b10; end 2'b10: begin if (data_in != 0) begin state <= 2'b11; end end 2'b11: begin packet_out[16:1] <= data_in; packet_out[35:33] <= 3'b101; packet_out[0] <= ^packet_out[34:3]; ready <= 1; state <= 2'b00; end endcase end end reg tx_state; reg tx_stop; always @(posedge clk) begin if (rst) tx_state<=0; else if(tx_stop) tx_state<=0; else if(ready) tx_state<=1; else tx_state<=tx_state; end reg [6:0]cnt; always @(posedge clk) begin if (rst)begin tx_wire<=1'b1; tx_stop<=1'b0; cnt<='d35; end else if(tx_state)begin if(cnt==0)begin tx_wire<=packet_out[cnt]; tx_stop<=1'b1; cnt<='d35; end else begin cnt<=cnt-1'b1; tx_stop<=1'b0; tx_wire<=packet_out[cnt]; end end else begin tx_wire<=1'b1; tx_stop<=1'b0; cnt<='d35; end end endmodule

这是一个 Verilog HDL 实现的数据封装器模块，用于将输入的数据以特定格式打包成数据包，以便于在通信中传输。常用于串口通信等场景。

该模块有以下输入和输出：

- 输入：时钟信号 clk、复位信号 rst、16 位数据信号 data_in。
- 输出：数据包信号 tx_wire、数据包就绪信号 ready。

该模块采用状态机实现，具有四个状态：

- 状态 00：空闲状态，等待非零数据输入。
- 状态 01：输入高 16 位数据。
- 状态 10：等待低 16 位数据输入。
- 状态 11：计算校验位并将数据包标记为就绪。

该模块还包含一个计数器 cnt，用于控制数据包中每一位数据的输出。当数据包就绪时，计数器开始计数并将数据包中的数据逐位输出到 tx_wire 信号，直到输出完毕。

在输出数据包时，还需要设置 tx_stop 信号，以便接收端能够判断数据包的末尾位置。

WORD32 packetShadowDelete(SDDM_LPP_PACKET_KEY* pPacketKey, SDDM_LPP_PACKET* pPacketValue) { WORD32 dwRet = ROSNG_PARAM_ERROR; WORD32 so_desc = 0; WORD32 tcp_index = 0; if((NULL == pPacketKey) || (NULL == pPacketValue)) { ROSNG_TRACE_WARNING("Invalid para!!!\n"); goto error; } so_desc = pPacketValue->so_desc; tcp_index = pPacketValue->sddm_tcp_packet_cb.index; if((TCP_RECV_QUEUE == pPacketValue->pkt_queue) && (0 != so_desc)) { if(ROSNG_SUCCESS != packetShadowDeletePkt(&gSocketTable.packetRecvAvlTree,pPacketKey,pPacketValue,so_desc)) { ROSNG_TRACE_WARNING("packetShadowDeletePkt fail\n"); goto error; } } else if((TCP_SEND_QUEUE == pPacketValue->pkt_queue) && (0 != tcp_index)) { if(ROSNG_SUCCESS != packetShadowDeletePkt(&tcp_config.packetSendAvlTree,pPacketKey,pPacketValue,tcp_index)) { ROSNG_TRACE_WARNING("packetShadowDeletePkt fail\n"); goto error; } } else { XOS_ASSERT(0); goto error; } dwRet = ROSNG_SUCCESS; error: return dwRet; } 用c语言写一个ft测试用例

以下是一个简单的ft测试用例，测试packetShadowDelete函数是否能够正常处理输入参数并返回正确的结果。

#include <stdio.h>
#include <assert.h>

typedef unsigned int WORD32;

typedef struct {
    WORD32 index;
} SDDM_TCP_PACKET_CB;

typedef struct {
    WORD32 so_desc;
    SDDM_TCP_PACKET_CB sddm_tcp_packet_cb;
    WORD32 pkt_queue;
} SDDM_LPP_PACKET;

typedef struct {
    // some fields
} SDDM_LPP_PACKET_KEY;

#define TCP_RECV_QUEUE 0
#define TCP_SEND_QUEUE 1

#define ROSNG_SUCCESS 0
#define ROSNG_PARAM_ERROR -1

#define ROSNG_TRACE_WARNING(...) printf(__VA_ARGS__)
#define XOS_ASSERT(...) assert(__VA_ARGS__)

typedef struct {
    // some fields
} PacketAvlTree;

PacketAvlTree packetRecvAvlTree;
PacketAvlTree packetSendAvlTree;

WORD32 packetShadowDeletePkt(PacketAvlTree* tree, SDDM_LPP_PACKET_KEY* key, SDDM_LPP_PACKET* value, WORD32 index) {
    // some implementation
    return ROSNG_SUCCESS;
}

WORD32 packetShadowDelete(SDDM_LPP_PACKET_KEY* pPacketKey, SDDM_LPP_PACKET* pPacketValue) {
    WORD32 dwRet = ROSNG_PARAM_ERROR;
    WORD32 so_desc = 0;
    WORD32 tcp_index = 0;

    if((NULL == pPacketKey) || (NULL == pPacketValue))
    {
        ROSNG_TRACE_WARNING("Invalid para!!!\n");
        goto error;
    }

    so_desc = pPacketValue->so_desc;
    tcp_index = pPacketValue->sddm_tcp_packet_cb.index;

    if((TCP_RECV_QUEUE == pPacketValue->pkt_queue) && (0 != so_desc))
    {
        if(ROSNG_SUCCESS != packetShadowDeletePkt(&packetRecvAvlTree,pPacketKey,pPacketValue,so_desc))
        {
            ROSNG_TRACE_WARNING("packetShadowDeletePkt fail\n");
            goto error;
        }
    }
    else if((TCP_SEND_QUEUE == pPacketValue->pkt_queue) && (0 != tcp_index))
    {
        if(ROSNG_SUCCESS != packetShadowDeletePkt(&packetSendAvlTree,pPacketKey,pPacketValue,tcp_index))
        {
            ROSNG_TRACE_WARNING("packetShadowDeletePkt fail\n");
            goto error;
        }
    }
    else
    {
        XOS_ASSERT(0);
        goto error;
    }

    dwRet = ROSNG_SUCCESS;

error:
    return dwRet;
}

int main() {
    SDDM_LPP_PACKET_KEY key;
    key.some_field = 123;

    SDDM_LPP_PACKET value;
    value.so_desc = 456;
    value.sddm_tcp_packet_cb.index = 789;
    value.pkt_queue = TCP_RECV_QUEUE;

    WORD32 ret = packetShadowDelete(&key, &value);
    assert(ret == ROSNG_SUCCESS);

    return 0;
}