def test_dissect(monkeypatch):
r"""Diff of C code (from test_bare()) to test against.
--- test_bare.c 2015-02-08 12:43:15.543135855 -0800
+++ test_dissect.c 2015-02-08 13:25:31.375715668 -0800
@@ -16,8 +16,22 @@
sk->s_local.nl_pid = 0;
sk->s_seq_next = 0;
- int ret = nl_send_simple(sk, RTM_GETLINK, 0, NULL, 0);
+ struct rtgenmsg rt_hdr = { .rtgen_family = AF_PACKET, };
+ struct nl_msg *msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP);
+ nlmsg_append(msg, &rt_hdr, sizeof(rt_hdr), NLMSG_ALIGNTO);
+ nl_complete_msg(sk, msg);
+ struct nlmsghdr *nlh = nlmsg_hdr(msg);
+ printf("%d == nlh->nlmsg_len\n", nlh->nlmsg_len);
+ printf("%d == nlh->nlmsg_type\n", nlh->nlmsg_type);
+ printf("%d == nlh->nlmsg_flags\n", nlh->nlmsg_flags);
+ printf("%d == nlh->nlmsg_seq\n", nlh->nlmsg_seq);
+ printf("%d == nlh->nlmsg_pid\n", nlh->nlmsg_pid);
+
+ struct iovec iov = { .iov_base = nlh, .iov_len = nlh->nlmsg_len };
+ struct msghdr hdr = { .msg_iov = &iov, .msg_iovlen = 1, };
+
+ int ret = nl_sendmsg(sk, msg, &hdr);
printf("Bytes: %d\n", ret);
return 0;
}
"""
monkeypatch.setattr(libnl.socket_, 'generate_local_port', lambda: 0)
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
sk.socket_instance.close()
sk.s_local.nl_pid = 0
sk.s_seq_next = 0
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP)
nlmsg_append(msg, rt_hdr, rt_hdr.SIZEOF, NLMSG_ALIGNTO)
nl_complete_msg(sk, msg)
nlh = nlmsg_hdr(msg)
assert 20 == nlh.nlmsg_len
assert 18 == nlh.nlmsg_type
assert 773 == nlh.nlmsg_flags
assert 0 == nlh.nlmsg_seq
assert 0 == nlh.nlmsg_pid
assert b'FAAAABIABQMAAAAAAAAAABEAAAA=' == base64.b64encode(
buffer(nlh.bytearray[:nlh.nlmsg_len]))
nl_socket_free(sk)
def test_dissect(monkeypatch):
r"""Diff of C code (from test_bare()) to test against.
--- test_bare.c 2015-02-08 12:43:15.543135855 -0800
+++ test_dissect.c 2015-02-08 13:25:31.375715668 -0800
@@ -16,8 +16,22 @@
sk->s_local.nl_pid = 0;
sk->s_seq_next = 0;
- int ret = nl_send_simple(sk, RTM_GETLINK, 0, NULL, 0);
+ struct rtgenmsg rt_hdr = { .rtgen_family = AF_PACKET, };
+ struct nl_msg *msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP);
+ nlmsg_append(msg, &rt_hdr, sizeof(rt_hdr), NLMSG_ALIGNTO);
+ nl_complete_msg(sk, msg);
+ struct nlmsghdr *nlh = nlmsg_hdr(msg);
+ printf("%d == nlh->nlmsg_len\n", nlh->nlmsg_len);
+ printf("%d == nlh->nlmsg_type\n", nlh->nlmsg_type);
+ printf("%d == nlh->nlmsg_flags\n", nlh->nlmsg_flags);
+ printf("%d == nlh->nlmsg_seq\n", nlh->nlmsg_seq);
+ printf("%d == nlh->nlmsg_pid\n", nlh->nlmsg_pid);
+
+ struct iovec iov = { .iov_base = nlh, .iov_len = nlh->nlmsg_len };
+ struct msghdr hdr = { .msg_iov = &iov, .msg_iovlen = 1, };
+
+ int ret = nl_sendmsg(sk, msg, &hdr);
printf("Bytes: %d\n", ret);
return 0;
}
"""
monkeypatch.setattr(libnl.socket_, 'generate_local_port', lambda: 0)
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
sk.socket_instance.close()
sk.s_local.nl_pid = 0
sk.s_seq_next = 0
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP)
nlmsg_append(msg, rt_hdr, rt_hdr.SIZEOF, NLMSG_ALIGNTO)
nl_complete_msg(sk, msg)
nlh = nlmsg_hdr(msg)
assert 20 == nlh.nlmsg_len
assert 18 == nlh.nlmsg_type
assert 773 == nlh.nlmsg_flags
assert 0 == nlh.nlmsg_seq
assert 0 == nlh.nlmsg_pid
assert b'FAAAABIABQMAAAAAAAAAABEAAAA=' == base64.b64encode(buffer(nlh.bytearray[:nlh.nlmsg_len]))
nl_socket_free(sk)
def nl_send_simple(sk, type_, flags, buf=None, size=0):
"""Construct and transmit a Netlink message.
https://github.com/thom311/libnl/blob/libnl3_2_25/lib/nl.c#L549
Allocates a new Netlink message based on `type_` and `flags`. If `buf` points to payload of length `size` that
payload will be appended to the message.
Sends out the message using `nl_send_auto()`.
Positional arguments:
sk -- Netlink socket (nl_sock class instance).
type_ -- Netlink message type (integer).
flags -- Netlink message flags (integer).
Keyword arguments:
buf -- payload data.
size -- size of `data` (integer).
Returns:
Number of characters sent on success or a negative error code.
"""
msg = nlmsg_alloc_simple(type_, flags)
if buf is not None and size:
err = nlmsg_append(msg, buf, size, NLMSG_ALIGNTO)
if err < 0:
return err
return nl_send_auto(sk, msg)
def nl_send_simple(sk, type_, flags, buf=None, size=0):
"""Construct and transmit a Netlink message.
https://github.com/thom311/libnl/blob/libnl3_2_25/lib/nl.c#L549
Allocates a new Netlink message based on `type_` and `flags`. If `buf` points to payload of length `size` that
payload will be appended to the message.
Sends out the message using `nl_send_auto()`.
Positional arguments:
sk -- Netlink socket (nl_sock class instance).
type_ -- Netlink message type (integer).
flags -- Netlink message flags (integer).
Keyword arguments:
buf -- payload data.
size -- size of `data` (integer).
Returns:
Number of characters sent on success or a negative error code.
"""
msg = nlmsg_alloc_simple(type_, flags)
if buf is not None and size:
err = nlmsg_append(msg, buf, size, NLMSG_ALIGNTO)
if err < 0:
return err
return nl_send_auto(sk, msg)
