#include <linux/sock_diag.h>
#include <linux/inet_diag.h>
#include <linux/unix_diag.h>
+#include <linux/netlink_diag.h>
#include <linux/rtnetlink.h>
-
-#if !defined NETLINK_SOCK_DIAG && defined NETLINK_INET_DIAG
-# define NETLINK_SOCK_DIAG NETLINK_INET_DIAG
-#endif
+#include "xlat/netlink_protocols.h"
#include <sys/un.h>
#ifndef UNIX_PATH_MAX
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;
return false;
}
- const 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)) {
return cache_and_print_inode_details(inode, details);
}
+static bool
+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 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);
+}
+
+static const struct {
+ const char *const name;
+ bool (*const print)(int, unsigned long);
+} protocols[] = {
+ [SOCK_PROTO_UNIX] = { "UNIX", unix_print },
+ [SOCK_PROTO_TCP] = { "TCP", tcp_v4_print },
+ [SOCK_PROTO_UDP] = { "UDP", udp_v4_print },
+ [SOCK_PROTO_TCPv6] = { "TCPv6", tcp_v6_print },
+ [SOCK_PROTO_UDPv6] = { "UDPv6", udp_v6_print },
+ [SOCK_PROTO_NETLINK] = { "NETLINK", netlink_print }
+};
+
+enum sock_proto
+get_proto_by_name(const char *const name)
+{
+ unsigned int i;
+ for (i = (unsigned int) SOCK_PROTO_UNKNOWN + 1;
+ i < ARRAY_SIZE(protocols); ++i) {
+ if (protocols[i].name && !strcmp(name, protocols[i].name))
+ return (enum sock_proto) i;
+ }
+ return SOCK_PROTO_UNKNOWN;
+}
+
/* 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 *const proto_name)
+print_sockaddr_by_inode(const unsigned long inode, const enum sock_proto proto)
{
- static const struct {
- const char *const name;
- bool (*const print)(int, unsigned long);
- } protocols[] = {
- { "TCP", tcp_v4_print },
- { "UDP", udp_v4_print },
- { "TCPv6", tcp_v6_print },
- { "UDPv6", udp_v6_print },
- { "UNIX", unix_print }
- };
+ if ((unsigned int) proto >= ARRAY_SIZE(protocols) ||
+ (proto != SOCK_PROTO_UNKNOWN && !protocols[proto].print))
+ return false;
const int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG);
if (fd < 0)
return false;
bool r = false;
- unsigned int i;
-
- if (proto_name) {
- for (i = 0; i < ARRAY_SIZE(protocols); ++i) {
- if (strcmp(proto_name, protocols[i].name) == 0) {
- r = protocols[i].print(fd, inode);
- break;
- }
- }
+ if (proto != SOCK_PROTO_UNKNOWN) {
+ r = protocols[proto].print(fd, inode);
if (!r) {
- tprintf("%s:[%lu]", proto_name, inode);
+ tprintf("%s:[%lu]", protocols[proto].name, inode);
r = true;
}
} else {
- for (i = 0; i < ARRAY_SIZE(protocols); ++i) {
- if ((r = protocols[i].print(fd, inode)))
+ unsigned int i;
+ for (i = (unsigned int) SOCK_PROTO_UNKNOWN + 1;
+ i < ARRAY_SIZE(protocols); ++i) {
+ if (!protocols[i].print)
+ continue;
+ r = protocols[i].print(fd, inode);
+ if (r)
break;
}
}
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