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我正在使用c中的原始以太網編程。我有兩個文件客戶端和服務器在本地主機上運行。我在socket()中使用自己的協議號進行通信。本地主機上的原始以太網PF_PACKET問題
在客戶端,我已經follwing代碼
s = socket(PF_PACKET, SOCK_RAW, 61187);
unsigned char dest_mac[6]= {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
struct sockaddr_ll socket_address;
socket_address.sll_family = PF_PACKET;
socket_address.sll_protocol = 61187;
socket_address.sll_ifindex = ifindex;
socket_address.sll_hatype = ARPHRD_ETHER;
socket_address.sll_pkttype = PACKET_BROADCAST;
socket_address.sll_halen = ETH_ALEN;
socket_address.sll_addr[0] = dest_mac[0];
socket_address.sll_addr[1] = dest_mac[1];
socket_address.sll_addr[2] = dest_mac[2];
socket_address.sll_addr[3] = dest_mac[3];
socket_address.sll_addr[4] = dest_mac[4];
socket_address.sll_addr[5] = dest_mac[5];
socket_address.sll_addr[6] = 0x00;
socket_address.sll_addr[7] = 0x00;
,然後我發送一些數據如下
sent = sendto(s, buffer, ETH_HEADER_LEN, 0, (struct sockaddr*)&socket_address, sizeof(socket_address));
在服務器端,我做的socket建立在客戶端和我在做什麼recvfrom的如下
length = recvfrom(s, buffer, BUF_SIZE, 0, NULL, NULL);
但我沒有收到服務器端的任何數據包。任何人都可以讓我知道問題是什麼?