非PACKET_MMAP捕获过程(plain AF_PACKET)效率非常低。它使用非常有限的缓冲区，并且需要一个系统调用来...
目前TPACKET_HEADER有三个版本,每个版本的长度略有不同,用户层可使用setsockopt(PACKET_VERSION)设置需要的版本,另外也可通过getsockopt(PACKET_HDRLEN)获取到每个版本对应的头部长度,设置环形接收buffer需要此长度值。 enumtpacket_versions { TPACKET_V1, TPACKET_V2, TPACKET_V3 }; 用户层通过setsockopt(PACKET_RX...
Compile the example inhttps://docs.kernel.org/networking/packet_mmap.htmland start it in a container as "packet_mmap eth0". Deploy with something like; apiVersion:apps/v1kind:Deploymentmetadata:name:rssfilespec:selector:matchLabels:app:rssfilereplicas:4template:metadata:labels:app:rssfilespec:con...
Looking throughaf_packet.c, it appears that the core of the work for transmitting with packet mmap takes place intpacket_snd(). But is this correct? How can we tell if this has anything to do with what we think it does? A very powerful tool for getting information lik...
fd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL)); if(fd <0) { perror("socket"); exit(1); } err = setsockopt(fd, SOL_PACKET, PACKET_VERSION, &v, sizeof(v)); if(err <0) { perror("setsockopt"); exit(1); } memset(&ring->req,0, sizeof(ring->req)); ...