Hi, I need to send some pure ethernet frames, I mean:
Ethernet Header | Ethernet Payload(my data only)
I want to send this structure from user space. Do you know any libraries or any primitives helping to do this?
Onur.
On linux, use packet-sockets:
man packet
Here is some example code that creates a packet socket:
int createPacketSocket(const char* dev_name, int ether_type, int dev_idx, int
should_bind) {
LF_TRC_IN_NT;
VLOG_INF(VLOG << "createPacketSocket: dev_name -:" << dev_name << ":- dev_idx: "
<< dev_idx
<< " type (decimal): " << ether_type << endl);int s = socket(PF_PACKET, SOCK_RAW, htons(ether_type)); int r; //retval
if (s < 0) {
cerr << "ERROR: socket: " << strerror(errno) << endl;
VLOG << "ERROR: socket: " << strerror(errno) << endl;
return s;
} if (should_bind) {
struct sockaddr_ll myaddr; memset(&myaddr, '\0', sizeof(myaddr));
myaddr.sll_family = AF_PACKET;
myaddr.sll_protocol = htons(ether_type);
myaddr.sll_ifindex = dev_idx;
//strcpy(myaddr.sa_data, dev_name); r = bind(s, (struct sockaddr*)(&myaddr), sizeof(myaddr));
if (r < 0) {
cerr << "ERROR: bind: " << strerror(errno) << endl;
VLOG << "ERROR: bind: " << strerror(errno) << endl;
return r;
}
}nonblock(s); return s; }
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