netmap-tools

Install netmap

in /ansible:

ansible-playbook -vv netmap-local.yml

load kernel module and run tests :

sudo modprobe netmap if_size=2048
sudo ip link set up dev enp2s0f0
sudo TEST_IFACE=enp2s0f0 build/debug-gcc8/unit

Configure ports

for example:

sudo ip a add 192.168.15.1/24 dev enp2s0f0
sudo ip a add 192.168.15.2/24 dev enp2s0f1

Test pkt-gen

on one side:

sudo pkt-gen -f tx -i netmap:enp2s0f0
sudo pkt-gen -f tx -i netmap:enp2s0f0 -s 192.168.15.1 -d 192.168.15.2 -S 68:05:ca:39:84:94 -D 68:05:ca:39:84:95

on other side:

sudo pkt-gen -f rx -i netmap:enp2s0f1

Example Applications

on one side:

sudo build/debug-gcc8/pkt_sender -i enp2s0f0 -s 68:05:ca:39:84:94 -d 68:05:ca:39:84:95

on other side:

sudo build/debug-gcc8/pkt_receiver -i enp2s0f1

Interface Library Receiver Example

netmap::iface iface("enp2s0f0");

unsigned len = 0;
char* buf = nullptr;
struct pollfd fds { .fd = iface.fd(), .events = POLLIN };

while (poll(&fds, 1, -1)) {
  while (iface.rx_rings[0].avail()) {
    buf = iface.rx_rings[0].next_buf(len);
    // do something with buf of length len
    iface.rx_rings[0].advance();
  }
}

Interface Library Sender Example

netmap::iface iface("enp2s0f0");

char* buf = nullptr;
char msg[14] = {0};
struct ether_header* eth = (struct ether_header*) msg;
// set ethernet header

struct pollfd fds { .fd = iface.fd(), .events = POLLIN };

while (poll(&fds, 1, -1)) {
  while (iface.tx_rings[0].avail()) {
    buf = iface.tx_rings[0].next_buf();
    std::memcpy(buf, msg, 14);
    iface.tx_rings[0].advance(14);
  }
}