def main():
"""Main function called upon script execution."""
# First open a socket to the kernel. Same one used for sending and receiving.
sk = nl_socket_alloc() # Creates an `nl_sock` instance.
ret = nl_connect(sk,
NETLINK_ROUTE) # Create file descriptor and bind socket.
if ret < 0:
reason = errmsg[abs(ret)]
return error('nl_connect() returned {0} ({1})'.format(ret, reason))
# Next we send the request to the kernel.
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
ret = nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, rt_hdr,
rt_hdr.SIZEOF)
if ret < 0:
reason = errmsg[abs(ret)]
return error('nl_send_simple() returned {0} ({1})'.format(ret, reason))
print('Sent {0} bytes to the kernel.'.format(ret))
# Finally we'll retrieve the kernel's answer, process it, and call any callbacks attached to the `nl_sock` instance.
nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, callback,
None) # Add callback to the `nl_sock` instance.
ret = nl_recvmsgs_default(
sk) # Get kernel's answer, and call attached callbacks.
if ret < 0:
reason = errmsg[abs(ret)]
return error('nl_recvmsgs_default() returned {0} ({1})'.format(
ret, reason))
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 test_full(tcp_server, monkeypatch):
r"""Diff of C code (from test_bare()) to test against.
--- test_bare.c 2015-02-08 12:43:15.543135855 -0800
+++ test_full.c 2015-02-08 12:43:08.533183752 -0800
@@ -13,10 +13,11 @@
struct nl_sock *sk = nl_socket_alloc();
nl_connect(sk, NETLINK_ROUTE);
sk->s_fd = fd;
- sk->s_local.nl_pid = 0;
- sk->s_seq_next = 0;
+ sk->s_local.nl_pid = 1234;
+ sk->s_seq_next = 10;
- int ret = nl_send_simple(sk, RTM_GETLINK, 0, NULL, 0);
+ struct rtgenmsg rt_hdr = { .rtgen_family = AF_PACKET, };
+ int ret = nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, &rt_hdr, sizeof(rt_hdr));
printf("Bytes: %d\n", ret);
return 0;
"""
monkeypatch.setattr(libnl.socket_, 'generate_local_port', lambda: 1234)
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
sk.socket_instance.close()
sk.socket_instance = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sk.socket_instance.connect(tcp_server.server.server_address)
sk.s_local.nl_pid = 1234
sk.s_seq_next = 10
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
assert 20 == nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP,
rt_hdr, rt_hdr.SIZEOF)
assert 1 == len(tcp_server.data)
assert b'FAAAABIABQMKAAAA0gQAABEAAAA=' == base64.b64encode(
buffer(tcp_server.data[0]))
nl_socket_free(sk)
def main():
"""Main function called upon script execution."""
# First open a socket to the kernel. Same one used for sending and receiving.
sk = nl_socket_alloc() # Creates an `nl_sock` instance.
ret = nl_connect(sk, NETLINK_ROUTE) # Create file descriptor and bind socket.
if ret < 0:
reason = errmsg[abs(ret)]
return error('nl_connect() returned {0} ({1})'.format(ret, reason))
# Next we send the request to the kernel.
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
ret = nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, rt_hdr, rt_hdr.SIZEOF)
if ret < 0:
reason = errmsg[abs(ret)]
return error('nl_send_simple() returned {0} ({1})'.format(ret, reason))
print('Sent {0} bytes to the kernel.'.format(ret))
# Finally we'll retrieve the kernel's answer, process it, and call any callbacks attached to the `nl_sock` instance.
nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, callback, None) # Add callback to the `nl_sock` instance.
ret = nl_recvmsgs_default(sk) # Get kernel's answer, and call attached callbacks.
if ret < 0:
reason = errmsg[abs(ret)]
return error('nl_recvmsgs_default() returned {0} ({1})'.format(ret, reason))
def test_full(tcp_server, monkeypatch):
r"""Diff of C code (from test_bare()) to test against.
--- test_bare.c 2015-02-08 12:43:15.543135855 -0800
+++ test_full.c 2015-02-08 12:43:08.533183752 -0800
@@ -13,10 +13,11 @@
struct nl_sock *sk = nl_socket_alloc();
nl_connect(sk, NETLINK_ROUTE);
sk->s_fd = fd;
- sk->s_local.nl_pid = 0;
- sk->s_seq_next = 0;
+ sk->s_local.nl_pid = 1234;
+ sk->s_seq_next = 10;
- int ret = nl_send_simple(sk, RTM_GETLINK, 0, NULL, 0);
+ struct rtgenmsg rt_hdr = { .rtgen_family = AF_PACKET, };
+ int ret = nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, &rt_hdr, sizeof(rt_hdr));
printf("Bytes: %d\n", ret);
return 0;
"""
monkeypatch.setattr(libnl.socket_, 'generate_local_port', lambda: 1234)
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
sk.socket_instance.close()
sk.socket_instance = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sk.socket_instance.connect(tcp_server.server.server_address)
sk.s_local.nl_pid = 1234
sk.s_seq_next = 10
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
assert 20 == nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, rt_hdr, rt_hdr.SIZEOF)
assert 1 == len(tcp_server.data)
assert b'FAAAABIABQMKAAAA0gQAABEAAAA=' == base64.b64encode(buffer(tcp_server.data[0]))
nl_socket_free(sk)
def test_list_interfaces(ifacesi):
r"""C code to test against.
// gcc a.c $(pkg-config --cflags --libs libnl-genl-3.0) && ./a.out
#include <netlink/msg.h>
static int callback(struct nl_msg *msg, void *arg) {
struct nlmsghdr *nlh = nlmsg_hdr(msg);
struct ifinfomsg *iface = NLMSG_DATA(nlh);
struct rtattr *hdr = IFLA_RTA(iface);
int remaining = nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*iface));
while (RTA_OK(hdr, remaining)) {
if (hdr->rta_type == IFLA_IFNAME) {
printf("Found network interface %d: %s\n", iface->ifi_index, (char *) RTA_DATA(hdr));
}
hdr = RTA_NEXT(hdr, remaining);
}
return NL_OK;
}
int main() {
// Send data to the kernel.
struct nl_sock *sk = nl_socket_alloc();
printf("%d == nl_connect(sk, NETLINK_ROUTE)\n", nl_connect(sk, NETLINK_ROUTE));
struct rtgenmsg rt_hdr = { .rtgen_family = AF_PACKET, };
int ret = nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, &rt_hdr, sizeof(rt_hdr));
printf("Bytes Sent: %d\n", ret);
// Retrieve kernel's response.
nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, callback, NULL);
printf("%d == nl_recvmsgs_default(sk)\n", nl_recvmsgs_default(sk));
nl_socket_free(sk);
return 0;
}
// Expected output:
// 0 == nl_connect(sk, NETLINK_ROUTE)
// Bytes Sent: 20
// Found network interface 1: lo
// Found network interface 2: eth0
// Found network interface 4: wlan0
// 0 == nl_recvmsgs_default(sk)
"""
got_something = dict()
def callback(msg, arg):
nlh = nlmsg_hdr(msg)
iface = ifinfomsg(nlmsg_data(nlh))
hdr = IFLA_RTA(iface)
remaining = c_int(nlh.nlmsg_len - NLMSG_LENGTH(iface.SIZEOF))
while RTA_OK(hdr, remaining):
if hdr.rta_type == IFLA_IFNAME:
arg[int(iface.ifi_index)] = str(get_string(RTA_DATA(hdr)).decode('ascii'))
hdr = RTA_NEXT(hdr, remaining)
return NL_OK
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
assert 20 == nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, rt_hdr, rt_hdr.SIZEOF)
assert 0 == nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, callback, got_something)
assert 0 == nl_recvmsgs_default(sk)
assert dict(ifacesi) == got_something
nl_socket_free(sk)
def test_nl_socket_modify_cb_error_verbose(log):
r"""C code to test against.
// gcc a.c $(pkg-config --cflags --libs libnl-genl-3.0) && NLDBG=4 NLCB=verbose ./a.out
#include <netlink/msg.h>
static int callback(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg) {
int *ret = arg;
*ret = err->error;
printf("Got something.\n");
return NL_STOP;
}
int main() {
// Send data to the kernel.
struct nl_sock *sk = nl_socket_alloc();
printf("%d == nl_connect(sk, NETLINK_ROUTE)\n", nl_connect(sk, NETLINK_ROUTE));
struct rtgenmsg rt_hdr = { .rtgen_family = AF_PACKET, };
int ret = nl_send_simple(sk, RTM_GETLINK, 0, &rt_hdr, sizeof(rt_hdr));
printf("Bytes Sent: %d\n", ret);
// Retrieve kernel's response.
int err = 0;
nl_socket_modify_err_cb(sk, NL_CB_CUSTOM, callback, &err);
printf("%d == err\n", err);
printf("%d == nl_recvmsgs_default(sk)\n", nl_recvmsgs_default(sk));
printf("%d == err\n", err);
nl_socket_free(sk);
return 0;
}
// Expected output (trimmed):
// nl_cache_mngt_register: Registered cache operations genl/family
// 0 == nl_connect(sk, NETLINK_ROUTE)
// __nlmsg_alloc: msg 0x124e0b8: Allocated new message, maxlen=4096
// nlmsg_alloc_simple: msg 0x124e0b8: Allocated new simple message
// nlmsg_reserve: msg 0x124e0b8: Reserved 4 (1) bytes, pad=4, nlmsg_len=20
// nlmsg_append: msg 0x124e0b8: Appended 1 bytes with padding 4
// nl_sendmsg: sent 20 bytes
// nlmsg_free: Returned message reference 0x124e0b8, 0 remaining
// nlmsg_free: msg 0x124e0b8: Freed
// Bytes Sent: 20
// 0 == err
// recvmsgs: Attempting to read from 0x124e080
// recvmsgs: recvmsgs(0x124e080): Read 40 bytes
// recvmsgs: recvmsgs(0x124e080): Processing valid message...
// __nlmsg_alloc: msg 0x12520c0: Allocated new message, maxlen=40
// recvmsgs: recvmsgs(0x124e080): Increased expected sequence number to 1424136270
// Got something.
// nlmsg_free: Returned message reference 0x12520c0, 0 remaining
// nlmsg_free: msg 0x12520c0: Freed
// -7 == nl_recvmsgs_default(sk)
// -22 == err
// nl_cache_mngt_unregister: Unregistered cache operations genl/family
"""
got_something = list()
def callback(_, err, arg):
arg.append(err.error)
return NL_STOP
del log[:]
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
assert 20 == nl_send_simple(sk, RTM_GETLINK, 0, rt_hdr, rt_hdr.SIZEOF)
assert match('nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=4096', log, True)
assert match('nlmsg_alloc_simple: msg 0x[a-f0-9]+: Allocated new simple message', log, True)
assert match('nlmsg_reserve: msg 0x[a-f0-9]+: Reserved 4 \(1\) bytes, pad=4, nlmsg_len=20', log, True)
assert match('nlmsg_append: msg 0x[a-f0-9]+: Appended 1 bytes with padding 4', log, True)
assert match('nl_sendmsg: sent 20 bytes', log)
assert not log
assert 0 == nl_socket_modify_err_cb(sk, NL_CB_CUSTOM, callback, got_something)
assert -7 == nl_recvmsgs_default(sk)
assert [-22] == got_something
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read 40 bytes', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...', log, True)
assert match('nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=40', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Increased expected sequence number to \d{4,}', log, True)
nl_socket_free(sk)
assert not log
def test_nl_socket_modify_cb(log, ifaces):
r"""C code to test against.
// gcc a.c $(pkg-config --cflags --libs libnl-genl-3.0) && NLDBG=4 ./a.out
#include <netlink/msg.h>
static int callback(struct nl_msg *msg, void *arg) {
printf("Got something.\n");
nl_msg_dump(msg, stdout);
return NL_OK;
}
int main() {
// Send data to the kernel.
struct nl_sock *sk = nl_socket_alloc();
printf("%d == nl_connect(sk, NETLINK_ROUTE)\n", nl_connect(sk, NETLINK_ROUTE));
struct rtgenmsg rt_hdr = { .rtgen_family = AF_PACKET, };
int ret = nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, &rt_hdr, sizeof(rt_hdr));
printf("Bytes Sent: %d\n", ret);
// Retrieve kernel's response.
nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, callback, NULL);
printf("%d == nl_recvmsgs_default(sk)\n", nl_recvmsgs_default(sk));
nl_socket_free(sk);
return 0;
}
// Expected output (trimmed):
// nl_cache_mngt_register: Registered cache operations genl/family
// 0 == nl_connect(sk, NETLINK_ROUTE)
// __nlmsg_alloc: msg 0x1b840b8: Allocated new message, maxlen=4096
// nlmsg_alloc_simple: msg 0x1b840b8: Allocated new simple message
// nlmsg_reserve: msg 0x1b840b8: Reserved 4 (1) bytes, pad=4, nlmsg_len=20
// nlmsg_append: msg 0x1b840b8: Appended 1 bytes with padding 4
// nl_sendmsg: sent 20 bytes
// nlmsg_free: Returned message reference 0x1b840b8, 0 remaining
// nlmsg_free: msg 0x1b840b8: Freed
// Bytes Sent: 20
// recvmsgs: Attempting to read from 0x1b84080
// recvmsgs: recvmsgs(0x1b84080): Read 3364 bytes
// recvmsgs: recvmsgs(0x1b84080): Processing valid message...
// __nlmsg_alloc: msg 0x1b880c0: Allocated new message, maxlen=1116
// Got something.
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 1116
// .type = 16 <0x10>
// .flags = 2 <MULTI>
// .seq = 1424133909
// .port = 6192
// [PAYLOAD] 1100 octets
// 00 00 04 03 01 00 00 00 49 00 01 00 00 00 00 00 ........I.......
// 07 00 03 00 6c 6f 00 00 08 00 0d 00 00 00 00 00 ....lo..........
// <trimmed>
// 00 00 00 00 00 00 00 00 00 00 00 00 ............
// --------------------------- END NETLINK MESSAGE ---------------------------
// recvmsgs: recvmsgs(0x1b84080): Processing valid message...
// nlmsg_free: Returned message reference 0x1b880c0, 0 remaining
// nlmsg_free: msg 0x1b880c0: Freed
// __nlmsg_alloc: msg 0x1b880c0: Allocated new message, maxlen=1124
// Got something.
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 1124
// .type = 16 <0x10>
// .flags = 2 <MULTI>
// .seq = 1424133909
// .port = 6192
// [PAYLOAD] 1108 octets
// 00 00 01 00 02 00 00 00 43 10 01 00 00 00 00 00 ........C.......
// 09 00 03 00 65 74 68 30 00 00 00 00 08 00 0d 00 ....eth0........
// <trimmed>
// 00 00 00 00 ....
// --------------------------- END NETLINK MESSAGE ---------------------------
// recvmsgs: recvmsgs(0x1b84080): Processing valid message...
// nlmsg_free: Returned message reference 0x1b880c0, 0 remaining
// nlmsg_free: msg 0x1b880c0: Freed
// __nlmsg_alloc: msg 0x1b880c0: Allocated new message, maxlen=1124
// Got something.
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 1124
// .type = 16 <0x10>
// .flags = 2 <MULTI>
// .seq = 1424133909
// .port = 6192
// [PAYLOAD] 1108 octets
// 00 00 01 00 04 00 00 00 03 10 00 00 00 00 00 00 ................
// 0a 00 03 00 77 6c 61 6e 30 00 00 00 08 00 0d 00 ....wlan0.......
// <trimmed>
// 00 00 00 00 ....
// --------------------------- END NETLINK MESSAGE ---------------------------
// nlmsg_free: Returned message reference 0x1b880c0, 0 remaining
// nlmsg_free: msg 0x1b880c0: Freed
// recvmsgs: Attempting to read from 0x1b84080
// recvmsgs: recvmsgs(0x1b84080): Read 20 bytes
// recvmsgs: recvmsgs(0x1b84080): Processing valid message...
// __nlmsg_alloc: msg 0x1b880c0: Allocated new message, maxlen=20
// recvmsgs: recvmsgs(0x1b84080): Increased expected sequence number to 1424133910
// nlmsg_free: Returned message reference 0x1b880c0, 0 remaining
// nlmsg_free: msg 0x1b880c0: Freed
// 0 == nl_recvmsgs_default(sk)
// nl_cache_mngt_unregister: Unregistered cache operations genl/family
"""
got_something = list()
def callback(msg, arg):
got_something.append(arg)
nl_msg_dump(msg)
return NL_OK
del log[:]
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
assert 20 == nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, rt_hdr, rt_hdr.SIZEOF)
assert match('nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=4096', log, True)
assert match('nlmsg_alloc_simple: msg 0x[a-f0-9]+: Allocated new simple message', log, True)
assert match('nlmsg_reserve: msg 0x[a-f0-9]+: Reserved 4 \(1\) bytes, pad=4, nlmsg_len=20', log, True)
assert match('nlmsg_append: msg 0x[a-f0-9]+: Appended 1 bytes with padding 4', log, True)
assert match('nl_sendmsg: sent 20 bytes', log)
assert not log
assert 0 == nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, callback, 95)
assert 0 == nl_recvmsgs_default(sk)
assert [95] * len(ifaces) == got_something
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read \d{4,} bytes', log, True)
for _ in ifaces:
if 'Attempting to read' in log[0]:
# Lots of network interfaces on this host.
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read \d{4,} bytes', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...', log, True)
assert match('nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=\d{3,}', log, True)
assert match('nl_msg_dump: -------------------------- BEGIN NETLINK MESSAGE ---------------------------', log)
assert match('nl_msg_dump: [NETLINK HEADER] 16 octets', log)
assert match('print_hdr: .nlmsg_len = \d{3,}', log, True)
assert match('print_hdr: .type = 16 <0x10>', log)
assert match('print_hdr: .flags = 2 <MULTI>', log)
assert match('print_hdr: .seq = \d{10}', log, True)
assert match('print_hdr: .port = \d{3,}', log, True)
assert match('print_msg: \[PAYLOAD\] \d{3,} octets', log, True)
rem = log.index('nl_msg_dump: --------------------------- END NETLINK MESSAGE ---------------------------')
assert 20 < rem # At least check that there were a lot of log statements skipped.
log = log[rem:]
assert match('nl_msg_dump: --------------------------- END NETLINK MESSAGE ---------------------------', log)
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read 20 bytes', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...', log, True)
assert match('nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=20', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Increased expected sequence number to \d{4,}', log, True)
nl_socket_free(sk)
assert not log
def test_multipart_verbose(log, ifaces):
"""Expected output (trimmed).
// nl_cache_mngt_register: Registered cache operations genl/family
// Begin main()
// Allocated socket.
// 0 == nl_connect(sk, NETLINK_ROUTE)
// __nlmsg_alloc: msg 0xa180b8: Allocated new message, maxlen=4096
// nlmsg_alloc_simple: msg 0xa180b8: Allocated new simple message
// nlmsg_reserve: msg 0xa180b8: Reserved 4 (1) bytes, pad=4, nlmsg_len=20
// nlmsg_append: msg 0xa180b8: Appended 1 bytes with padding 4
// nl_sendmsg: sent 20 bytes
// nlmsg_free: Returned message reference 0xa180b8, 0 remaining
// nlmsg_free: msg 0xa180b8: Freed
// Bytes Sent: 20
// recvmsgs: Attempting to read from 0xa18080
// recvmsgs: recvmsgs(0xa18080): Read 3364 bytes
// recvmsgs: recvmsgs(0xa18080): Processing valid message...
// __nlmsg_alloc: msg 0xa1c0c0: Allocated new message, maxlen=1116
// -- Warning: unhandled valid message: type=0x10 length=1116 flags=<MULTI> sequence-nr=1424132449 pid=5810
// recvmsgs: recvmsgs(0xa18080): Processing valid message...
// nlmsg_free: Returned message reference 0xa1c0c0, 0 remaining
// nlmsg_free: msg 0xa1c0c0: Freed
// __nlmsg_alloc: msg 0xa1c0c0: Allocated new message, maxlen=1124
// -- Warning: unhandled valid message: type=0x10 length=1124 flags=<MULTI> sequence-nr=1424132449 pid=5810
// recvmsgs: recvmsgs(0xa18080): Processing valid message...
// nlmsg_free: Returned message reference 0xa1c0c0, 0 remaining
// nlmsg_free: msg 0xa1c0c0: Freed
// __nlmsg_alloc: msg 0xa1c0c0: Allocated new message, maxlen=1124
// -- Warning: unhandled valid message: type=0x10 length=1124 flags=<MULTI> sequence-nr=1424132449 pid=5810
// nlmsg_free: Returned message reference 0xa1c0c0, 0 remaining
// nlmsg_free: msg 0xa1c0c0: Freed
// recvmsgs: Attempting to read from 0xa18080
// recvmsgs: recvmsgs(0xa18080): Read 20 bytes
// recvmsgs: recvmsgs(0xa18080): Processing valid message...
// __nlmsg_alloc: msg 0xa1c0c0: Allocated new message, maxlen=20
// recvmsgs: recvmsgs(0xa18080): Increased expected sequence number to 1424132450
// nlmsg_free: Returned message reference 0xa1c0c0, 0 remaining
// nlmsg_free: msg 0xa1c0c0: Freed
// 0 == nl_recvmsgs_default(sk)
// nl_cache_mngt_unregister: Unregistered cache operations genl/family
"""
del log[:]
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
assert 20 == nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP,
rt_hdr, rt_hdr.SIZEOF)
assert match(
'nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=4096',
log, True)
assert match(
'nlmsg_alloc_simple: msg 0x[a-f0-9]+: Allocated new simple message',
log, True)
assert match(
'nlmsg_reserve: msg 0x[a-f0-9]+: Reserved 4 \(1\) bytes, pad=4, nlmsg_len=20',
log, True)
assert match(
'nlmsg_append: msg 0x[a-f0-9]+: Appended 1 bytes with padding 4', log,
True)
assert match('nl_sendmsg: sent 20 bytes', log)
assert not log
assert 0 == nl_recvmsgs_default(sk)
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read \d{4,} bytes', log,
True)
for _ in ifaces:
if 'Attempting to read' in log[0]:
# Lots of network interfaces on this host.
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log,
True)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read \d{4,} bytes', log,
True)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...',
log, True)
assert match(
'nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=\d{3,}',
log, True)
assert match(
'nl_valid_handler_verbose: -- Warning: unhandled valid message: type=0x10 length=\d{3,} '
'flags=<MULTI> sequence-nr=\d{10,} pid=\d{3,}', log, True)
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read 20 bytes', log, True)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...', log,
True)
assert match(
'nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=20', log,
True)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Increased expected sequence number to \d{4,}',
log, True)
nl_socket_free(sk)
assert not log
def test_multipart(log, ifaces):
r"""C code to test against.
// gcc a.c $(pkg-config --cflags --libs libnl-genl-3.0) && NLDBG=4 NLCB=debug ./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.
printf("Begin main()\n");
struct nl_sock *sk = nl_socket_alloc();
printf("Allocated socket.\n");
printf("%d == nl_connect(sk, NETLINK_ROUTE)\n", nl_connect(sk, NETLINK_ROUTE));
struct rtgenmsg rt_hdr = { .rtgen_family = AF_PACKET, };
int ret = nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, &rt_hdr, sizeof(rt_hdr));
printf("Bytes Sent: %d\n", ret);
// Retrieve kernel's response.
printf("%d == nl_recvmsgs_default(sk)\n", nl_recvmsgs_default(sk));
nl_socket_free(sk);
return 0;
}
// Expected output (trimmed):
// nl_cache_mngt_register: Registered cache operations genl/family
// Begin main()
// Allocated socket.
// 0 == nl_connect(sk, NETLINK_ROUTE)
// __nlmsg_alloc: msg 0x1bbe0b8: Allocated new message, maxlen=4096
// nlmsg_alloc_simple: msg 0x1bbe0b8: Allocated new simple message
// nlmsg_reserve: msg 0x1bbe0b8: Reserved 4 (1) bytes, pad=4, nlmsg_len=20
// nlmsg_append: msg 0x1bbe0b8: Appended 1 bytes with padding 4
// -- Debug: Sent Message:
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 20
// .type = 18 <0x12>
// .flags = 773 <REQUEST,ACK,ROOT,MATCH>
// .seq = 1424053819
// .port = 18409
// [PAYLOAD] 4 octets
// 11 00 00 00 ....
// --------------------------- END NETLINK MESSAGE ---------------------------
// nl_sendmsg: sent 20 bytes
// nlmsg_free: Returned message reference 0x1bbe0b8, 0 remaining
// nlmsg_free: msg 0x1bbe0b8: Freed
// Bytes Sent: 20
// recvmsgs: Attempting to read from 0x1bbe080
// recvmsgs: recvmsgs(0x1bbe080): Read 3364 bytes
// recvmsgs: recvmsgs(0x1bbe080): Processing valid message...
// __nlmsg_alloc: msg 0x1bc20c0: Allocated new message, maxlen=1116
// -- Debug: Received Message:
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 1116
// .type = 16 <0x10>
// .flags = 2 <MULTI>
// .seq = 1424053819
// .port = 18409
// [PAYLOAD] 1100 octets
// 00 00 04 03 01 00 00 00 49 00 01 00 00 00 00 00 ........I.......
// <trimmed>
// 00 00 00 00 00 00 00 00 00 00 00 00 ............
// --------------------------- END NETLINK MESSAGE ---------------------------
// -- Debug: Unhandled Valid message: type=0x10 length=1116 flags=<MULTI> sequence-nr=1424053819 pid=18409
// recvmsgs: recvmsgs(0x1bbe080): Processing valid message...
// nlmsg_free: Returned message reference 0x1bc20c0, 0 remaining
// nlmsg_free: msg 0x1bc20c0: Freed
// __nlmsg_alloc: msg 0x1bc20c0: Allocated new message, maxlen=1124
// -- Debug: Received Message:
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 1124
// .type = 16 <0x10>
// .flags = 2 <MULTI>
// .seq = 1424053819
// .port = 18409
// [PAYLOAD] 1108 octets
// 00 00 01 00 02 00 00 00 43 10 01 00 00 00 00 00 ........C.......
// <trimmed>
// 00 00 00 00 ....
// --------------------------- END NETLINK MESSAGE ---------------------------
// -- Debug: Unhandled Valid message: type=0x10 length=1124 flags=<MULTI> sequence-nr=1424053819 pid=18409
// recvmsgs: recvmsgs(0x1bbe080): Processing valid message...
// nlmsg_free: Returned message reference 0x1bc20c0, 0 remaining
// nlmsg_free: msg 0x1bc20c0: Freed
// __nlmsg_alloc: msg 0x1bc20c0: Allocated new message, maxlen=1124
// -- Debug: Received Message:
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 1124
// .type = 16 <0x10>
// .flags = 2 <MULTI>
// .seq = 1424053819
// .port = 18409
// [PAYLOAD] 1108 octets
// 00 00 01 00 03 00 00 00 03 10 00 00 00 00 00 00 ................
// <trimmed>
// 00 00 00 00 ....
// --------------------------- END NETLINK MESSAGE ---------------------------
// -- Debug: Unhandled Valid message: type=0x10 length=1124 flags=<MULTI> sequence-nr=1424053819 pid=18409
// nlmsg_free: Returned message reference 0x1bc20c0, 0 remaining
// nlmsg_free: msg 0x1bc20c0: Freed
// recvmsgs: Attempting to read from 0x1bbe080
// recvmsgs: recvmsgs(0x1bbe080): Read 20 bytes
// recvmsgs: recvmsgs(0x1bbe080): Processing valid message...
// __nlmsg_alloc: msg 0x1bc20c0: Allocated new message, maxlen=20
// -- Debug: Received Message:
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 20
// .type = 3 <DONE>
// .flags = 2 <MULTI>
// .seq = 1424053819
// .port = 18409
// [PAYLOAD] 4 octets
// 00 00 00 00 ....
// --------------------------- END NETLINK MESSAGE ---------------------------
// recvmsgs: recvmsgs(0x1bbe080): Increased expected sequence number to 1424053820
// -- Debug: End of multipart message block: type=DONE length=20 flags=<MULTI> sequence-nr=1424053819 pid=18409
// nlmsg_free: Returned message reference 0x1bc20c0, 0 remaining
// nlmsg_free: msg 0x1bc20c0: Freed
// 0 == nl_recvmsgs_default(sk)
// nl_cache_mngt_unregister: Unregistered cache operations genl/family
"""
del log[:]
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
assert 20 == nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP,
rt_hdr, rt_hdr.SIZEOF)
assert match(
'nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=4096',
log, True)
assert match(
'nlmsg_alloc_simple: msg 0x[a-f0-9]+: Allocated new simple message',
log, True)
assert match(
'nlmsg_reserve: msg 0x[a-f0-9]+: Reserved 4 \(1\) bytes, pad=4, nlmsg_len=20',
log, True)
assert match(
'nlmsg_append: msg 0x[a-f0-9]+: Appended 1 bytes with padding 4', log,
True)
assert match('nl_msg_out_handler_debug: -- Debug: Sent Message:', log)
assert match(
'nl_msg_dump: -------------------------- BEGIN NETLINK MESSAGE ---------------------------',
log)
assert match('nl_msg_dump: [NETLINK HEADER] 16 octets', log)
assert match('print_hdr: .nlmsg_len = 20', log)
assert match('print_hdr: .type = 18 <0x12>', log)
assert match('print_hdr: .flags = 773 <REQUEST,ACK,ROOT,MATCH>', log)
assert match('print_hdr: .seq = \d{10}', log, True)
assert match('print_hdr: .port = \d{3,}', log, True)
assert match('print_msg: [PAYLOAD] 4 octets', log)
assert match(
'dump_hex: 11 00 00 00 ....',
log)
assert match(
'nl_msg_dump: --------------------------- END NETLINK MESSAGE ---------------------------',
log)
assert match('nl_sendmsg: sent 20 bytes', log)
assert not log
assert 0 == nl_recvmsgs_default(sk)
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read \d{4,} bytes', log,
True)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...', log,
True)
assert match(
'nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=\d{3,}',
log, True)
assert match('nl_msg_in_handler_debug: -- Debug: Received Message:', log)
assert match(
'nl_msg_dump: -------------------------- BEGIN NETLINK MESSAGE ---------------------------',
log)
assert match('nl_msg_dump: [NETLINK HEADER] 16 octets', log)
assert match('print_hdr: .nlmsg_len = \d{3,}', log, True)
assert match('print_hdr: .type = 16 <0x10>', log)
assert match('print_hdr: .flags = 2 <MULTI>', log)
assert match('print_hdr: .seq = \d{10}', log, True)
assert match('print_hdr: .port = \d{3,}', log, True)
assert match('print_msg: \[PAYLOAD\] \d{3,} octets', log, True)
assert match(
'dump_hex: 00 00 04 03 01 00 00 00 49 00 01 00 00 00 00 00 ........I.......',
log)
assert match(
'dump_hex: 07 00 03 00 6c 6f 00 00 08 00 0d 00 00 00 00 00 ....lo..........',
log)
assert match(
'dump_hex: 05 00 10 00 00 00 00 00 05 00 11 00 00 00 00 00 ................',
log)
for _ in ifaces:
# Done testing this payload. Differs too much between Travis and Raspbian, and probably others.
rem = log.index(
'nl_msg_dump: --------------------------- END NETLINK MESSAGE ---------------------------'
)
assert 20 < rem # At least check that there were a lot of log statements skipped.
log = log[rem:]
assert match(
'nl_msg_dump: --------------------------- END NETLINK MESSAGE ---------------------------',
log)
assert match(
'nl_valid_handler_debug: -- Debug: Unhandled Valid message: type=0x10 length=\d{3,} flags=<MULTI> '
'sequence-nr=\d{10,} pid=\d{3,}', log, True)
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read 20 bytes', log, True)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...', log,
True)
assert match(
'nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=20', log,
True)
assert match('nl_msg_in_handler_debug: -- Debug: Received Message:', log)
assert match(
'nl_msg_dump: -------------------------- BEGIN NETLINK MESSAGE ---------------------------',
log)
assert match('nl_msg_dump: [NETLINK HEADER] 16 octets', log)
assert match('print_hdr: .nlmsg_len = 20', log)
assert match('print_hdr: .type = 3 <DONE>', log)
assert match('print_hdr: .flags = 2 <MULTI>', log)
assert match('print_hdr: .seq = \d{10}', log, True)
assert match('print_hdr: .port = \d{3,}', log, True)
assert match('print_msg: [PAYLOAD] 4 octets', log)
assert match(
'dump_hex: 00 00 00 00 ....',
log)
assert match(
'nl_msg_dump: --------------------------- END NETLINK MESSAGE ---------------------------',
log)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Increased expected sequence number to \d{4,}',
log, True)
assert match(
'nl_finish_handler_debug: -- Debug: End of multipart message block: type=DONE length=20 flags=<MULTI> '
'sequence-nr=\d{10,} pid=\d{3,}', log, True)
nl_socket_free(sk)
assert not log
def test_nl_socket_modify_cb_error_verbose(log):
r"""C code to test against.
// gcc a.c $(pkg-config --cflags --libs libnl-genl-3.0) && NLDBG=4 NLCB=verbose ./a.out
#include <netlink/msg.h>
static int callback(struct sockaddr_nl *nla, struct nlmsgerr *err, void *arg) {
int *ret = arg;
*ret = err->error;
printf("Got something.\n");
return NL_STOP;
}
int main() {
// Send data to the kernel.
struct nl_sock *sk = nl_socket_alloc();
printf("%d == nl_connect(sk, NETLINK_ROUTE)\n", nl_connect(sk, NETLINK_ROUTE));
struct rtgenmsg rt_hdr = { .rtgen_family = AF_PACKET, };
int ret = nl_send_simple(sk, RTM_GETLINK, 0, &rt_hdr, sizeof(rt_hdr));
printf("Bytes Sent: %d\n", ret);
// Retrieve kernel's response.
int err = 0;
nl_socket_modify_err_cb(sk, NL_CB_CUSTOM, callback, &err);
printf("%d == err\n", err);
printf("%d == nl_recvmsgs_default(sk)\n", nl_recvmsgs_default(sk));
printf("%d == err\n", err);
nl_socket_free(sk);
return 0;
}
// Expected output (trimmed):
// nl_cache_mngt_register: Registered cache operations genl/family
// 0 == nl_connect(sk, NETLINK_ROUTE)
// __nlmsg_alloc: msg 0x124e0b8: Allocated new message, maxlen=4096
// nlmsg_alloc_simple: msg 0x124e0b8: Allocated new simple message
// nlmsg_reserve: msg 0x124e0b8: Reserved 4 (1) bytes, pad=4, nlmsg_len=20
// nlmsg_append: msg 0x124e0b8: Appended 1 bytes with padding 4
// nl_sendmsg: sent 20 bytes
// nlmsg_free: Returned message reference 0x124e0b8, 0 remaining
// nlmsg_free: msg 0x124e0b8: Freed
// Bytes Sent: 20
// 0 == err
// recvmsgs: Attempting to read from 0x124e080
// recvmsgs: recvmsgs(0x124e080): Read 40 bytes
// recvmsgs: recvmsgs(0x124e080): Processing valid message...
// __nlmsg_alloc: msg 0x12520c0: Allocated new message, maxlen=40
// recvmsgs: recvmsgs(0x124e080): Increased expected sequence number to 1424136270
// Got something.
// nlmsg_free: Returned message reference 0x12520c0, 0 remaining
// nlmsg_free: msg 0x12520c0: Freed
// -7 == nl_recvmsgs_default(sk)
// -22 == err
// nl_cache_mngt_unregister: Unregistered cache operations genl/family
"""
got_something = list()
def callback(_, err, arg):
arg.append(err.error)
return NL_STOP
del log[:]
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
assert 20 == nl_send_simple(sk, RTM_GETLINK, 0, rt_hdr, rt_hdr.SIZEOF)
assert match(
'nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=4096',
log, True)
assert match(
'nlmsg_alloc_simple: msg 0x[a-f0-9]+: Allocated new simple message',
log, True)
assert match(
'nlmsg_reserve: msg 0x[a-f0-9]+: Reserved 4 \(1\) bytes, pad=4, nlmsg_len=20',
log, True)
assert match(
'nlmsg_append: msg 0x[a-f0-9]+: Appended 1 bytes with padding 4', log,
True)
assert match('nl_sendmsg: sent 20 bytes', log)
assert not log
assert 0 == nl_socket_modify_err_cb(sk, NL_CB_CUSTOM, callback,
got_something)
assert -7 == nl_recvmsgs_default(sk)
assert [-22] == got_something
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read 40 bytes', log, True)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...', log,
True)
assert match(
'nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=40', log,
True)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Increased expected sequence number to \d{4,}',
log, True)
nl_socket_free(sk)
assert not log
def test_nl_socket_modify_cb(log, ifaces):
r"""C code to test against.
// gcc a.c $(pkg-config --cflags --libs libnl-genl-3.0) && NLDBG=4 ./a.out
#include <netlink/msg.h>
static int callback(struct nl_msg *msg, void *arg) {
printf("Got something.\n");
nl_msg_dump(msg, stdout);
return NL_OK;
}
int main() {
// Send data to the kernel.
struct nl_sock *sk = nl_socket_alloc();
printf("%d == nl_connect(sk, NETLINK_ROUTE)\n", nl_connect(sk, NETLINK_ROUTE));
struct rtgenmsg rt_hdr = { .rtgen_family = AF_PACKET, };
int ret = nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, &rt_hdr, sizeof(rt_hdr));
printf("Bytes Sent: %d\n", ret);
// Retrieve kernel's response.
nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, callback, NULL);
printf("%d == nl_recvmsgs_default(sk)\n", nl_recvmsgs_default(sk));
nl_socket_free(sk);
return 0;
}
// Expected output (trimmed):
// nl_cache_mngt_register: Registered cache operations genl/family
// 0 == nl_connect(sk, NETLINK_ROUTE)
// __nlmsg_alloc: msg 0x1b840b8: Allocated new message, maxlen=4096
// nlmsg_alloc_simple: msg 0x1b840b8: Allocated new simple message
// nlmsg_reserve: msg 0x1b840b8: Reserved 4 (1) bytes, pad=4, nlmsg_len=20
// nlmsg_append: msg 0x1b840b8: Appended 1 bytes with padding 4
// nl_sendmsg: sent 20 bytes
// nlmsg_free: Returned message reference 0x1b840b8, 0 remaining
// nlmsg_free: msg 0x1b840b8: Freed
// Bytes Sent: 20
// recvmsgs: Attempting to read from 0x1b84080
// recvmsgs: recvmsgs(0x1b84080): Read 3364 bytes
// recvmsgs: recvmsgs(0x1b84080): Processing valid message...
// __nlmsg_alloc: msg 0x1b880c0: Allocated new message, maxlen=1116
// Got something.
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 1116
// .type = 16 <0x10>
// .flags = 2 <MULTI>
// .seq = 1424133909
// .port = 6192
// [PAYLOAD] 1100 octets
// 00 00 04 03 01 00 00 00 49 00 01 00 00 00 00 00 ........I.......
// 07 00 03 00 6c 6f 00 00 08 00 0d 00 00 00 00 00 ....lo..........
// <trimmed>
// 00 00 00 00 00 00 00 00 00 00 00 00 ............
// --------------------------- END NETLINK MESSAGE ---------------------------
// recvmsgs: recvmsgs(0x1b84080): Processing valid message...
// nlmsg_free: Returned message reference 0x1b880c0, 0 remaining
// nlmsg_free: msg 0x1b880c0: Freed
// __nlmsg_alloc: msg 0x1b880c0: Allocated new message, maxlen=1124
// Got something.
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 1124
// .type = 16 <0x10>
// .flags = 2 <MULTI>
// .seq = 1424133909
// .port = 6192
// [PAYLOAD] 1108 octets
// 00 00 01 00 02 00 00 00 43 10 01 00 00 00 00 00 ........C.......
// 09 00 03 00 65 74 68 30 00 00 00 00 08 00 0d 00 ....eth0........
// <trimmed>
// 00 00 00 00 ....
// --------------------------- END NETLINK MESSAGE ---------------------------
// recvmsgs: recvmsgs(0x1b84080): Processing valid message...
// nlmsg_free: Returned message reference 0x1b880c0, 0 remaining
// nlmsg_free: msg 0x1b880c0: Freed
// __nlmsg_alloc: msg 0x1b880c0: Allocated new message, maxlen=1124
// Got something.
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 1124
// .type = 16 <0x10>
// .flags = 2 <MULTI>
// .seq = 1424133909
// .port = 6192
// [PAYLOAD] 1108 octets
// 00 00 01 00 04 00 00 00 03 10 00 00 00 00 00 00 ................
// 0a 00 03 00 77 6c 61 6e 30 00 00 00 08 00 0d 00 ....wlan0.......
// <trimmed>
// 00 00 00 00 ....
// --------------------------- END NETLINK MESSAGE ---------------------------
// nlmsg_free: Returned message reference 0x1b880c0, 0 remaining
// nlmsg_free: msg 0x1b880c0: Freed
// recvmsgs: Attempting to read from 0x1b84080
// recvmsgs: recvmsgs(0x1b84080): Read 20 bytes
// recvmsgs: recvmsgs(0x1b84080): Processing valid message...
// __nlmsg_alloc: msg 0x1b880c0: Allocated new message, maxlen=20
// recvmsgs: recvmsgs(0x1b84080): Increased expected sequence number to 1424133910
// nlmsg_free: Returned message reference 0x1b880c0, 0 remaining
// nlmsg_free: msg 0x1b880c0: Freed
// 0 == nl_recvmsgs_default(sk)
// nl_cache_mngt_unregister: Unregistered cache operations genl/family
"""
got_something = list()
def callback(msg, arg):
got_something.append(arg)
nl_msg_dump(msg)
return NL_OK
del log[:]
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
assert 20 == nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP,
rt_hdr, rt_hdr.SIZEOF)
assert match(
'nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=4096',
log, True)
assert match(
'nlmsg_alloc_simple: msg 0x[a-f0-9]+: Allocated new simple message',
log, True)
assert match(
'nlmsg_reserve: msg 0x[a-f0-9]+: Reserved 4 \(1\) bytes, pad=4, nlmsg_len=20',
log, True)
assert match(
'nlmsg_append: msg 0x[a-f0-9]+: Appended 1 bytes with padding 4', log,
True)
assert match('nl_sendmsg: sent 20 bytes', log)
assert not log
assert 0 == nl_socket_modify_cb(sk, NL_CB_VALID, NL_CB_CUSTOM, callback,
95)
assert 0 == nl_recvmsgs_default(sk)
assert [95] * len(ifaces) == got_something
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read \d{4,} bytes', log,
True)
for _ in ifaces:
if 'Attempting to read' in log[0]:
# Lots of network interfaces on this host.
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log,
True)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read \d{4,} bytes', log,
True)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...',
log, True)
assert match(
'nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=\d{3,}',
log, True)
assert match(
'nl_msg_dump: -------------------------- BEGIN NETLINK MESSAGE ---------------------------',
log)
assert match('nl_msg_dump: [NETLINK HEADER] 16 octets', log)
assert match('print_hdr: .nlmsg_len = \d{3,}', log, True)
assert match('print_hdr: .type = 16 <0x10>', log)
assert match('print_hdr: .flags = 2 <MULTI>', log)
assert match('print_hdr: .seq = \d{10}', log, True)
assert match('print_hdr: .port = \d{3,}', log, True)
assert match('print_msg: \[PAYLOAD\] \d{3,} octets', log, True)
rem = log.index(
'nl_msg_dump: --------------------------- END NETLINK MESSAGE ---------------------------'
)
assert 20 < rem # At least check that there were a lot of log statements skipped.
log = log[rem:]
assert match(
'nl_msg_dump: --------------------------- END NETLINK MESSAGE ---------------------------',
log)
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read 20 bytes', log, True)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...', log,
True)
assert match(
'nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=20', log,
True)
assert match(
'recvmsgs: recvmsgs\(0x[a-f0-9]+\): Increased expected sequence number to \d{4,}',
log, True)
nl_socket_free(sk)
assert not log
def test_multipart_verbose(log, ifaces):
"""Expected output (trimmed).
// nl_cache_mngt_register: Registered cache operations genl/family
// Begin main()
// Allocated socket.
// 0 == nl_connect(sk, NETLINK_ROUTE)
// __nlmsg_alloc: msg 0xa180b8: Allocated new message, maxlen=4096
// nlmsg_alloc_simple: msg 0xa180b8: Allocated new simple message
// nlmsg_reserve: msg 0xa180b8: Reserved 4 (1) bytes, pad=4, nlmsg_len=20
// nlmsg_append: msg 0xa180b8: Appended 1 bytes with padding 4
// nl_sendmsg: sent 20 bytes
// nlmsg_free: Returned message reference 0xa180b8, 0 remaining
// nlmsg_free: msg 0xa180b8: Freed
// Bytes Sent: 20
// recvmsgs: Attempting to read from 0xa18080
// recvmsgs: recvmsgs(0xa18080): Read 3364 bytes
// recvmsgs: recvmsgs(0xa18080): Processing valid message...
// __nlmsg_alloc: msg 0xa1c0c0: Allocated new message, maxlen=1116
// -- Warning: unhandled valid message: type=0x10 length=1116 flags=<MULTI> sequence-nr=1424132449 pid=5810
// recvmsgs: recvmsgs(0xa18080): Processing valid message...
// nlmsg_free: Returned message reference 0xa1c0c0, 0 remaining
// nlmsg_free: msg 0xa1c0c0: Freed
// __nlmsg_alloc: msg 0xa1c0c0: Allocated new message, maxlen=1124
// -- Warning: unhandled valid message: type=0x10 length=1124 flags=<MULTI> sequence-nr=1424132449 pid=5810
// recvmsgs: recvmsgs(0xa18080): Processing valid message...
// nlmsg_free: Returned message reference 0xa1c0c0, 0 remaining
// nlmsg_free: msg 0xa1c0c0: Freed
// __nlmsg_alloc: msg 0xa1c0c0: Allocated new message, maxlen=1124
// -- Warning: unhandled valid message: type=0x10 length=1124 flags=<MULTI> sequence-nr=1424132449 pid=5810
// nlmsg_free: Returned message reference 0xa1c0c0, 0 remaining
// nlmsg_free: msg 0xa1c0c0: Freed
// recvmsgs: Attempting to read from 0xa18080
// recvmsgs: recvmsgs(0xa18080): Read 20 bytes
// recvmsgs: recvmsgs(0xa18080): Processing valid message...
// __nlmsg_alloc: msg 0xa1c0c0: Allocated new message, maxlen=20
// recvmsgs: recvmsgs(0xa18080): Increased expected sequence number to 1424132450
// nlmsg_free: Returned message reference 0xa1c0c0, 0 remaining
// nlmsg_free: msg 0xa1c0c0: Freed
// 0 == nl_recvmsgs_default(sk)
// nl_cache_mngt_unregister: Unregistered cache operations genl/family
"""
del log[:]
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
assert 20 == nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, rt_hdr, rt_hdr.SIZEOF)
assert match('nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=4096', log, True)
assert match('nlmsg_alloc_simple: msg 0x[a-f0-9]+: Allocated new simple message', log, True)
assert match('nlmsg_reserve: msg 0x[a-f0-9]+: Reserved 4 \(1\) bytes, pad=4, nlmsg_len=20', log, True)
assert match('nlmsg_append: msg 0x[a-f0-9]+: Appended 1 bytes with padding 4', log, True)
assert match('nl_sendmsg: sent 20 bytes', log)
assert not log
assert 0 == nl_recvmsgs_default(sk)
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read \d{4,} bytes', log, True)
for _ in ifaces:
if 'Attempting to read' in log[0]:
# Lots of network interfaces on this host.
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read \d{4,} bytes', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...', log, True)
assert match('nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=\d{3,}', log, True)
assert match('nl_valid_handler_verbose: -- Warning: unhandled valid message: type=0x10 length=\d{3,} '
'flags=<MULTI> sequence-nr=\d{10,} pid=\d{3,}', log, True)
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read 20 bytes', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...', log, True)
assert match('nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=20', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Increased expected sequence number to \d{4,}', log, True)
nl_socket_free(sk)
assert not log
def test_multipart(log, ifaces):
r"""C code to test against.
// gcc a.c $(pkg-config --cflags --libs libnl-genl-3.0) && NLDBG=4 NLCB=debug ./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.
printf("Begin main()\n");
struct nl_sock *sk = nl_socket_alloc();
printf("Allocated socket.\n");
printf("%d == nl_connect(sk, NETLINK_ROUTE)\n", nl_connect(sk, NETLINK_ROUTE));
struct rtgenmsg rt_hdr = { .rtgen_family = AF_PACKET, };
int ret = nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, &rt_hdr, sizeof(rt_hdr));
printf("Bytes Sent: %d\n", ret);
// Retrieve kernel's response.
printf("%d == nl_recvmsgs_default(sk)\n", nl_recvmsgs_default(sk));
nl_socket_free(sk);
return 0;
}
// Expected output (trimmed):
// nl_cache_mngt_register: Registered cache operations genl/family
// Begin main()
// Allocated socket.
// 0 == nl_connect(sk, NETLINK_ROUTE)
// __nlmsg_alloc: msg 0x1bbe0b8: Allocated new message, maxlen=4096
// nlmsg_alloc_simple: msg 0x1bbe0b8: Allocated new simple message
// nlmsg_reserve: msg 0x1bbe0b8: Reserved 4 (1) bytes, pad=4, nlmsg_len=20
// nlmsg_append: msg 0x1bbe0b8: Appended 1 bytes with padding 4
// -- Debug: Sent Message:
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 20
// .type = 18 <0x12>
// .flags = 773 <REQUEST,ACK,ROOT,MATCH>
// .seq = 1424053819
// .port = 18409
// [PAYLOAD] 4 octets
// 11 00 00 00 ....
// --------------------------- END NETLINK MESSAGE ---------------------------
// nl_sendmsg: sent 20 bytes
// nlmsg_free: Returned message reference 0x1bbe0b8, 0 remaining
// nlmsg_free: msg 0x1bbe0b8: Freed
// Bytes Sent: 20
// recvmsgs: Attempting to read from 0x1bbe080
// recvmsgs: recvmsgs(0x1bbe080): Read 3364 bytes
// recvmsgs: recvmsgs(0x1bbe080): Processing valid message...
// __nlmsg_alloc: msg 0x1bc20c0: Allocated new message, maxlen=1116
// -- Debug: Received Message:
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 1116
// .type = 16 <0x10>
// .flags = 2 <MULTI>
// .seq = 1424053819
// .port = 18409
// [PAYLOAD] 1100 octets
// 00 00 04 03 01 00 00 00 49 00 01 00 00 00 00 00 ........I.......
// <trimmed>
// 00 00 00 00 00 00 00 00 00 00 00 00 ............
// --------------------------- END NETLINK MESSAGE ---------------------------
// -- Debug: Unhandled Valid message: type=0x10 length=1116 flags=<MULTI> sequence-nr=1424053819 pid=18409
// recvmsgs: recvmsgs(0x1bbe080): Processing valid message...
// nlmsg_free: Returned message reference 0x1bc20c0, 0 remaining
// nlmsg_free: msg 0x1bc20c0: Freed
// __nlmsg_alloc: msg 0x1bc20c0: Allocated new message, maxlen=1124
// -- Debug: Received Message:
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 1124
// .type = 16 <0x10>
// .flags = 2 <MULTI>
// .seq = 1424053819
// .port = 18409
// [PAYLOAD] 1108 octets
// 00 00 01 00 02 00 00 00 43 10 01 00 00 00 00 00 ........C.......
// <trimmed>
// 00 00 00 00 ....
// --------------------------- END NETLINK MESSAGE ---------------------------
// -- Debug: Unhandled Valid message: type=0x10 length=1124 flags=<MULTI> sequence-nr=1424053819 pid=18409
// recvmsgs: recvmsgs(0x1bbe080): Processing valid message...
// nlmsg_free: Returned message reference 0x1bc20c0, 0 remaining
// nlmsg_free: msg 0x1bc20c0: Freed
// __nlmsg_alloc: msg 0x1bc20c0: Allocated new message, maxlen=1124
// -- Debug: Received Message:
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 1124
// .type = 16 <0x10>
// .flags = 2 <MULTI>
// .seq = 1424053819
// .port = 18409
// [PAYLOAD] 1108 octets
// 00 00 01 00 03 00 00 00 03 10 00 00 00 00 00 00 ................
// <trimmed>
// 00 00 00 00 ....
// --------------------------- END NETLINK MESSAGE ---------------------------
// -- Debug: Unhandled Valid message: type=0x10 length=1124 flags=<MULTI> sequence-nr=1424053819 pid=18409
// nlmsg_free: Returned message reference 0x1bc20c0, 0 remaining
// nlmsg_free: msg 0x1bc20c0: Freed
// recvmsgs: Attempting to read from 0x1bbe080
// recvmsgs: recvmsgs(0x1bbe080): Read 20 bytes
// recvmsgs: recvmsgs(0x1bbe080): Processing valid message...
// __nlmsg_alloc: msg 0x1bc20c0: Allocated new message, maxlen=20
// -- Debug: Received Message:
// -------------------------- BEGIN NETLINK MESSAGE ---------------------------
// [NETLINK HEADER] 16 octets
// .nlmsg_len = 20
// .type = 3 <DONE>
// .flags = 2 <MULTI>
// .seq = 1424053819
// .port = 18409
// [PAYLOAD] 4 octets
// 00 00 00 00 ....
// --------------------------- END NETLINK MESSAGE ---------------------------
// recvmsgs: recvmsgs(0x1bbe080): Increased expected sequence number to 1424053820
// -- Debug: End of multipart message block: type=DONE length=20 flags=<MULTI> sequence-nr=1424053819 pid=18409
// nlmsg_free: Returned message reference 0x1bc20c0, 0 remaining
// nlmsg_free: msg 0x1bc20c0: Freed
// 0 == nl_recvmsgs_default(sk)
// nl_cache_mngt_unregister: Unregistered cache operations genl/family
"""
del log[:]
sk = nl_socket_alloc()
nl_connect(sk, NETLINK_ROUTE)
rt_hdr = rtgenmsg(rtgen_family=socket.AF_PACKET)
assert 20 == nl_send_simple(sk, RTM_GETLINK, NLM_F_REQUEST | NLM_F_DUMP, rt_hdr, rt_hdr.SIZEOF)
assert match('nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=4096', log, True)
assert match('nlmsg_alloc_simple: msg 0x[a-f0-9]+: Allocated new simple message', log, True)
assert match('nlmsg_reserve: msg 0x[a-f0-9]+: Reserved 4 \(1\) bytes, pad=4, nlmsg_len=20', log, True)
assert match('nlmsg_append: msg 0x[a-f0-9]+: Appended 1 bytes with padding 4', log, True)
assert match('nl_msg_out_handler_debug: -- Debug: Sent Message:', log)
assert match('nl_msg_dump: -------------------------- BEGIN NETLINK MESSAGE ---------------------------', log)
assert match('nl_msg_dump: [NETLINK HEADER] 16 octets', log)
assert match('print_hdr: .nlmsg_len = 20', log)
assert match('print_hdr: .type = 18 <0x12>', log)
assert match('print_hdr: .flags = 773 <REQUEST,ACK,ROOT,MATCH>', log)
assert match('print_hdr: .seq = \d{10}', log, True)
assert match('print_hdr: .port = \d{3,}', log, True)
assert match('print_msg: [PAYLOAD] 4 octets', log)
assert match('dump_hex: 11 00 00 00 ....', log)
assert match('nl_msg_dump: --------------------------- END NETLINK MESSAGE ---------------------------', log)
assert match('nl_sendmsg: sent 20 bytes', log)
assert not log
assert 0 == nl_recvmsgs_default(sk)
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read \d{4,} bytes', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...', log, True)
assert match('nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=\d{3,}', log, True)
assert match('nl_msg_in_handler_debug: -- Debug: Received Message:', log)
assert match('nl_msg_dump: -------------------------- BEGIN NETLINK MESSAGE ---------------------------', log)
assert match('nl_msg_dump: [NETLINK HEADER] 16 octets', log)
assert match('print_hdr: .nlmsg_len = \d{3,}', log, True)
assert match('print_hdr: .type = 16 <0x10>', log)
assert match('print_hdr: .flags = 2 <MULTI>', log)
assert match('print_hdr: .seq = \d{10}', log, True)
assert match('print_hdr: .port = \d{3,}', log, True)
assert match('print_msg: \[PAYLOAD\] \d{3,} octets', log, True)
assert match('dump_hex: 00 00 04 03 01 00 00 00 49 00 01 00 00 00 00 00 ........I.......', log)
assert match('dump_hex: 07 00 03 00 6c 6f 00 00 08 00 0d 00 00 00 00 00 ....lo..........', log)
assert match('dump_hex: 05 00 10 00 00 00 00 00 05 00 11 00 00 00 00 00 ................', log)
for _ in ifaces:
# Done testing this payload. Differs too much between Travis and Raspbian, and probably others.
rem = log.index('nl_msg_dump: --------------------------- END NETLINK MESSAGE ---------------------------')
assert 20 < rem # At least check that there were a lot of log statements skipped.
log = log[rem:]
assert match('nl_msg_dump: --------------------------- END NETLINK MESSAGE ---------------------------', log)
assert match('nl_valid_handler_debug: -- Debug: Unhandled Valid message: type=0x10 length=\d{3,} flags=<MULTI> '
'sequence-nr=\d{10,} pid=\d{3,}', log, True)
assert match('recvmsgs: Attempting to read from 0x[a-f0-9]+', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Read 20 bytes', log, True)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Processing valid message...', log, True)
assert match('nlmsg_alloc: msg 0x[a-f0-9]+: Allocated new message, maxlen=20', log, True)
assert match('nl_msg_in_handler_debug: -- Debug: Received Message:', log)
assert match('nl_msg_dump: -------------------------- BEGIN NETLINK MESSAGE ---------------------------', log)
assert match('nl_msg_dump: [NETLINK HEADER] 16 octets', log)
assert match('print_hdr: .nlmsg_len = 20', log)
assert match('print_hdr: .type = 3 <DONE>', log)
assert match('print_hdr: .flags = 2 <MULTI>', log)
assert match('print_hdr: .seq = \d{10}', log, True)
assert match('print_hdr: .port = \d{3,}', log, True)
assert match('print_msg: [PAYLOAD] 4 octets', log)
assert match('dump_hex: 00 00 00 00 ....', log)
assert match('nl_msg_dump: --------------------------- END NETLINK MESSAGE ---------------------------', log)
assert match('recvmsgs: recvmsgs\(0x[a-f0-9]+\): Increased expected sequence number to \d{4,}', log, True)
assert match('nl_finish_handler_debug: -- Debug: End of multipart message block: type=DONE length=20 flags=<MULTI> '
'sequence-nr=\d{10,} pid=\d{3,}', log, True)
nl_socket_free(sk)
assert not log
