def test_nl_recv():
r"""C code to test against.
// gcc a.c $(pkg-config --cflags --libs libnl-genl-3.0) && ./a.out
#include <netlink/msg.h>
struct nl_sock {
struct sockaddr_nl s_local; struct sockaddr_nl s_peer; int s_fd; int s_proto; unsigned int s_seq_next;
unsigned int s_seq_expect; int s_flags; struct nl_cb *s_cb; size_t s_bufsize;
};
int main() {
// Send data to the kernel.
struct nl_sock *sk = nl_socket_alloc();
sk->s_seq_next = 0;
nl_connect(sk, NETLINK_ROUTE);
int ret = nl_send_simple(sk, 0, NLM_F_REQUEST, NULL, 0);
printf("Bytes Sent: %d\n", ret);
// Retrieve kernel's response.
// nl_recvmsgs_default(sk);
// return 0;
unsigned char *buf = NULL;
struct sockaddr_nl nla = {0};
printf("%d == nla.nl_family\n", nla.nl_family);
int n = nl_recv(sk, &nla, &buf, NULL);
printf("Bytes Recv: %d\n", n);
int i = 0; for (i = 0; i<n; i++) printf("%02x", buf[i]); printf("\n");
printf("%d == nla.nl_family\n", nla.nl_family);
return 0;
}
// Expected output:
// Bytes Sent: 16
// 0 == nla.nl_family
// Bytes Recv: 36
// 240000000200000000000000844c000000000000100000000000050000000000844c0000
// 16 == nla.nl_family
// Output delta:
// 240000000200000000000000ac4e000000000000100000000000050000000000ac4e0000
"""
sk = nl_socket_alloc()
sk.s_seq_next = 0
nl_connect(sk, NETLINK_ROUTE)
assert 16 == nl_send_simple(sk, 0, NLM_F_REQUEST, None)
buf = bytearray()
nla = sockaddr_nl()
assert 0 == nla.nl_family
assert 36 == nl_recv(sk, nla, buf, None)
nl_socket_free(sk)
buf_hex = binascii.hexlify(buffer(buf)).decode('ascii')
assert re.match(
r'240000000200000000000000....000000000000100000000000050000000000....0000',
buf_hex)
assert 16 == nla.nl_family
def test_nl_recv():
r"""C code to test against.
// gcc a.c $(pkg-config --cflags --libs libnl-genl-3.0) && ./a.out
#include <netlink/msg.h>
struct nl_sock {
struct sockaddr_nl s_local; struct sockaddr_nl s_peer; int s_fd; int s_proto; unsigned int s_seq_next;
unsigned int s_seq_expect; int s_flags; struct nl_cb *s_cb; size_t s_bufsize;
};
int main() {
// Send data to the kernel.
struct nl_sock *sk = nl_socket_alloc();
sk->s_seq_next = 0;
nl_connect(sk, NETLINK_ROUTE);
int ret = nl_send_simple(sk, 0, NLM_F_REQUEST, NULL, 0);
printf("Bytes Sent: %d\n", ret);
// Retrieve kernel's response.
// nl_recvmsgs_default(sk);
// return 0;
unsigned char *buf = NULL;
struct sockaddr_nl nla = {0};
printf("%d == nla.nl_family\n", nla.nl_family);
int n = nl_recv(sk, &nla, &buf, NULL);
printf("Bytes Recv: %d\n", n);
int i = 0; for (i = 0; i<n; i++) printf("%02x", buf[i]); printf("\n");
printf("%d == nla.nl_family\n", nla.nl_family);
return 0;
}
// Expected output:
// Bytes Sent: 16
// 0 == nla.nl_family
// Bytes Recv: 36
// 240000000200000000000000844c000000000000100000000000050000000000844c0000
// 16 == nla.nl_family
// Output delta:
// 240000000200000000000000ac4e000000000000100000000000050000000000ac4e0000
"""
sk = nl_socket_alloc()
sk.s_seq_next = 0
nl_connect(sk, NETLINK_ROUTE)
assert 16 == nl_send_simple(sk, 0, NLM_F_REQUEST, None)
buf = bytearray()
nla = sockaddr_nl()
assert 0 == nla.nl_family
assert 36 == nl_recv(sk, nla, buf, None)
nl_socket_free(sk)
buf_hex = binascii.hexlify(buffer(buf)).decode('ascii')
assert re.match(r'240000000200000000000000....000000000000100000000000050000000000....0000', buf_hex)
assert 16 == nla.nl_family
def callback_recv(sk, nla, buf, creds):
n = nl_recv(sk, nla, buf, creds)
dump_hex(logging.getLogger().debug, buf, len(buf), 0)
return n
def callback_recv(sk, nla, buf, creds):
n = nl_recv(sk, nla, buf, creds)
dump_hex(logging.getLogger().debug, buf, len(buf), 0)
return n