winsock2: RAW SOCKET recvfrom() returns 错误 10022（无效参数）

Question

我正尝试在 Windows 10 中使用 RAW SOCKET 处理传入的网络数据包。

当我调用 recvfrom() 函数时，它 returns -1 值。 WSAGetLastError 是 10022。

Microsoft 文档页面给我以下描述：

WSAEINVAL: 10022
Invalid argument.
Some invalid argument was supplied (for example, specifying an invalid level to the setsockopt function). In some instances, it also refers to the current state of the socket—for instance, calling accept on a socket that is not listening.

我曾尝试使用 setsockopt() 将 IP_HDRINCL 设置为 1，但是当我调用 recvfrom().

时它 returns 同样的错误

我的源代码：

#include "stdio.h"
#include "winsock2.h"
#include "ws2tcpip.h"


int main(){
    SOCKET s;
    char* buff = malloc(256);
    int optval = 1;
    struct sockaddr_in adr;
    int adr_length = sizeof(adr);
    int i;
    int rcv_len;
    WSADATA wsa;

    memset(buff, 0, 256);

    if(WSAStartup(MAKEWORD(2,2), &wsa) != 0){
        printf("Error in WSAStartup: %d\n", WSAGetLastError());
        getch();
        return 0;
    }

    s = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
    if(s == SOCKET_ERROR){
        printf("Error in socket creation: %d\n", WSAGetLastError());
        getch();
        return 0;
    }

    if(setsockopt(s, IPPROTO_IP, IP_HDRINCL, (char *)&optval, sizeof(optval)) == -1){
        printf("Error in setsockopt(): %d\n", WSAGetLastError());
        getch();
        closesocket(s);
        return 0;
    }

    while(1){
        rcv_len = recvfrom(s, buff, 256, 0, (struct sockaddr*)&adr, &adr_length);

        if(rcv_len == -1){
            printf("Error in recvfrom(): %d\n", WSAGetLastError());
            getch();
            break;
        }

        for(i = 0; i < 256; i ++){
            printf("%c", *(buff + i));
        }
    }

    closesocket(s);

    return 1;
}

Return:

Error in recvfrom(): 10022

Answer 1

我已经解决了这个问题。

缺少什么：

使用您正在处理的接口的 IP bind() 打开 SOCKET
使用 WSAIoctl()

SO_RCVALL

所以，现在代码正在使用此来源：

#include "stdio.h"
#include "winsock2.h"
#include "ws2tcpip.h"

int main(){
    SOCKET s;
    unsigned char* buff = malloc(32768);
    int optval = 1;
    struct sockaddr_in adr;
    struct sockaddr_in sadr;
    int adr_length = 0;
    int i;
    int in;
    int rcv_len;
    WSADATA wsa;

    memset(buff, 0, 32768);

    if(WSAStartup(MAKEWORD(2,2), &wsa) != 0){
        printf("Error in WSAStartup: %d\n", WSAGetLastError());
        getch();
        return 0;
    }

    s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
    if(s == SOCKET_ERROR){
        printf("Error in socket creation: %d\n", WSAGetLastError());
        getch();
        return 0;
    }

    sadr.sin_family = AF_INET;
    sadr.sin_addr.s_addr = inet_addr("127.0.0.1");
    sadr.sin_port = htons(0);

    bind(s, (struct sockaddr*)&sadr, sizeof(sadr));

    if(setsockopt(s, IPPROTO_IP, IP_HDRINCL, (char *)&optval, sizeof(optval)) == -1){
        printf("Error in setsockopt(): %d\n", WSAGetLastError());
        getch();
        closesocket(s);
        return 0;
    }

    optval = 1;
    WSAIoctl(s, SIO_RCVALL, &optval, sizeof(optval), 0, 0, (LPDWORD) &in, 0, 0);

    while(1){
        adr_length = sizeof(adr);
        rcv_len = recvfrom(s, buff, 32768, 0, (struct sockaddr*)&adr, &adr_length);

        if(rcv_len == -1){
            printf("Error in recvfrom(): %d\n", WSAGetLastError());
            getch();
            break;
        }

        for(i = 0; i < rcv_len; i ++){
            printf("%d ", *(buff + i));
        }
    }

    closesocket(s);

    return 1;
}

谢谢大家！

winsock2: RAW SOCKET recvfrom() returns 错误 10022（无效参数）

winsock2: RAW SOCKET recvfrom() returns Error 10022 (Invalid Argument)

c

sockets

windows

winsock2

recvfrom