#include <linux/sock_diag.h>
#include <linux/inet_diag.h>
#include <linux/unix_diag.h>
+#include <linux/netlink_diag.h>
#include <linux/rtnetlink.h>
+#include "xlat/netlink_protocols.h"
#if !defined NETLINK_SOCK_DIAG && defined NETLINK_INET_DIAG
# define NETLINK_SOCK_DIAG NETLINK_INET_DIAG
#define CACHE_MASK (CACHE_SIZE - 1)
static int
-cache_and_print_inode_details(const unsigned long inode, char *details)
+cache_and_print_inode_details(const unsigned long inode, char *const details)
{
cache_entry *e = &cache[inode & CACHE_MASK];
free(e->details);
bool
print_sockaddr_by_inode_cached(const unsigned long inode)
{
- const cache_entry *e = &cache[inode & CACHE_MASK];
+ const cache_entry *const e = &cache[inode & CACHE_MASK];
if (e && inode == e->inode) {
tprints(e->details);
return true;
}
static bool
-inet_send_query(const int fd, const int family, const int proto)
+send_query(const int fd, void *req, size_t req_size)
{
struct sockaddr_nl nladdr = {
.nl_family = AF_NETLINK
};
- struct {
- struct nlmsghdr nlh;
- struct inet_diag_req_v2 idr;
- } req = {
- .nlh = {
- .nlmsg_len = sizeof(req),
- .nlmsg_type = SOCK_DIAG_BY_FAMILY,
- .nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST
- },
- .idr = {
- .sdiag_family = family,
- .sdiag_protocol = proto,
- .idiag_states = -1
- }
- };
struct iovec iov = {
- .iov_base = &req,
- .iov_len = sizeof(req)
+ .iov_base = req,
+ .iov_len = req_size
};
- struct msghdr msg = {
- .msg_name = (void *) &nladdr,
+ const struct msghdr msg = {
+ .msg_name = &nladdr,
.msg_namelen = sizeof(nladdr),
.msg_iov = &iov,
.msg_iovlen = 1
}
}
+static bool
+inet_send_query(const int fd, const int family, const int proto)
+{
+ struct {
+ const struct nlmsghdr nlh;
+ const struct inet_diag_req_v2 idr;
+ } req = {
+ .nlh = {
+ .nlmsg_len = sizeof(req),
+ .nlmsg_type = SOCK_DIAG_BY_FAMILY,
+ .nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST
+ },
+ .idr = {
+ .sdiag_family = family,
+ .sdiag_protocol = proto,
+ .idiag_states = -1
+ }
+ };
+ return send_query(fd, &req, sizeof(req));
+}
+
static int
-inet_parse_response(const char *proto_name, const void *data,
+inet_parse_response(const char *const proto_name, const void *const data,
const int data_len, const unsigned long inode)
{
- const struct inet_diag_msg *diag_msg = data;
+ const struct inet_diag_msg *const diag_msg = data;
static const char zero_addr[sizeof(struct in6_addr)];
socklen_t addr_size, text_size;
int (* parser) (const char *, const void *,
int, unsigned long))
{
- static long buf[8192 / sizeof(long)];
+ static union {
+ struct nlmsghdr hdr;
+ long buf[8192 / sizeof(long)];
+ } hdr_buf;
+
struct sockaddr_nl nladdr = {
.nl_family = AF_NETLINK
};
struct iovec iov = {
- .iov_base = buf,
- .iov_len = sizeof(buf)
+ .iov_base = hdr_buf.buf,
+ .iov_len = sizeof(hdr_buf.buf)
};
int flags = 0;
for (;;) {
- ssize_t ret;
struct msghdr msg = {
- .msg_name = (void *) &nladdr,
+ .msg_name = &nladdr,
.msg_namelen = sizeof(nladdr),
.msg_iov = &iov,
.msg_iovlen = 1
};
- ret = recvmsg(fd, &msg, flags);
+ ssize_t ret = recvmsg(fd, &msg, flags);
if (ret < 0) {
if (errno == EINTR)
continue;
return false;
}
- struct nlmsghdr *h = (struct nlmsghdr *) buf;
+ const struct nlmsghdr *h = &hdr_buf.hdr;
if (!NLMSG_OK(h, ret))
return false;
for (; NLMSG_OK(h, ret); h = NLMSG_NEXT(h, ret)) {
if (h->nlmsg_type != SOCK_DIAG_BY_FAMILY)
return false;
- int rc = parser(proto_name, NLMSG_DATA(h),
- h->nlmsg_len, inode);
+ const int rc = parser(proto_name, NLMSG_DATA(h),
+ h->nlmsg_len, inode);
if (rc > 0)
return true;
if (rc < 0)
static bool
unix_send_query(const int fd, const unsigned long inode)
{
- struct sockaddr_nl nladdr = {
- .nl_family = AF_NETLINK
- };
struct {
- struct nlmsghdr nlh;
- struct unix_diag_req udr;
+ const struct nlmsghdr nlh;
+ const struct unix_diag_req udr;
} req = {
.nlh = {
.nlmsg_len = sizeof(req),
.nlmsg_type = SOCK_DIAG_BY_FAMILY,
- .nlmsg_flags = NLM_F_REQUEST
+ .nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST
},
.udr = {
.sdiag_family = AF_UNIX,
.udiag_ino = inode,
.udiag_states = -1,
- .udiag_show = UDIAG_SHOW_NAME | UDIAG_SHOW_PEER,
- .udiag_cookie = { ~0U, ~0U }
+ .udiag_show = UDIAG_SHOW_NAME | UDIAG_SHOW_PEER
}
};
- struct iovec iov = {
- .iov_base = &req,
- .iov_len = sizeof(req)
- };
- struct msghdr msg = {
- .msg_name = (void *) &nladdr,
- .msg_namelen = sizeof(nladdr),
- .msg_iov = &iov,
- .msg_iovlen = 1
- };
-
- for (;;) {
- if (sendmsg(fd, &msg, 0) < 0) {
- if (errno == EINTR)
- continue;
- return false;
- }
- return true;
- }
+ return send_query(fd, &req, sizeof(req));
}
static int
}
static bool
-unix_print(int fd, const unsigned long inode)
+netlink_send_query(const int fd, const unsigned long inode)
+{
+ struct {
+ const struct nlmsghdr nlh;
+ const struct netlink_diag_req ndr;
+ } req = {
+ .nlh = {
+ .nlmsg_len = sizeof(req),
+ .nlmsg_type = SOCK_DIAG_BY_FAMILY,
+ .nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST
+ },
+ .ndr = {
+ .sdiag_family = AF_NETLINK,
+ .sdiag_protocol = NDIAG_PROTO_ALL,
+ .ndiag_show = NDIAG_SHOW_MEMINFO
+ }
+ };
+ return send_query(fd, &req, sizeof(req));
+}
+
+static int
+netlink_parse_response(const char *proto_name, const void *data,
+ const int data_len, const unsigned long inode)
+{
+ const struct netlink_diag_msg *const diag_msg = data;
+ const char *netlink_proto;
+ char *details;
+
+ if (data_len < (int) NLMSG_LENGTH(sizeof(*diag_msg)))
+ return -1;
+ if (diag_msg->ndiag_ino != inode)
+ return 0;
+
+ if (diag_msg->ndiag_family != AF_NETLINK)
+ return -1;
+
+ netlink_proto = xlookup(netlink_protocols,
+ diag_msg->ndiag_protocol);
+
+ if (netlink_proto) {
+ static const char netlink_prefix[] = "NETLINK_";
+ const size_t netlink_prefix_len =
+ sizeof(netlink_prefix) -1;
+ if (strncmp(netlink_proto, netlink_prefix,
+ netlink_prefix_len) == 0)
+ netlink_proto += netlink_prefix_len;
+ if (asprintf(&details, "%s:[%s:%u]", proto_name,
+ netlink_proto, diag_msg->ndiag_portid) < 0)
+ return -1;
+ } else {
+ if (asprintf(&details, "%s:[%u]", proto_name,
+ (unsigned) diag_msg->ndiag_protocol) < 0)
+ return -1;
+ }
+
+ return cache_and_print_inode_details(inode, details);
+}
+
+static bool
+unix_print(const int fd, const unsigned long inode)
{
return unix_send_query(fd, inode)
&& receive_responses(fd, inode, "UNIX", unix_parse_response);
return inet_print(fd, AF_INET6, IPPROTO_UDP, inode, "UDPv6");
}
+static bool
+netlink_print(const int fd, const unsigned long inode)
+{
+ return netlink_send_query(fd, inode)
+ && receive_responses(fd, inode, "NETLINK",
+ netlink_parse_response);
+}
+
/* Given an inode number of a socket, print out the details
* of the ip address and port. */
bool
-print_sockaddr_by_inode(const unsigned long inode, const char *proto_name)
+print_sockaddr_by_inode(const unsigned long inode, const char *const proto_name)
{
static const struct {
const char *const name;
{ "UDP", udp_v4_print },
{ "TCPv6", tcp_v6_print },
{ "UDPv6", udp_v6_print },
- { "UNIX", unix_print }
+ { "UNIX", unix_print },
+ { "NETLINK", netlink_print }
};
const int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG);
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