#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
# define UNIX_PATH_MAX sizeof(((struct sockaddr_un *) 0)->sun_path)
#endif
+typedef struct {
+ unsigned long inode;
+ char *details;
+} cache_entry;
+
+#define CACHE_SIZE 1024U
+static cache_entry cache[CACHE_SIZE];
+#define CACHE_MASK (CACHE_SIZE - 1)
+
+static int
+cache_and_print_inode_details(const unsigned long inode, char *const details)
+{
+ cache_entry *e = &cache[inode & CACHE_MASK];
+ free(e->details);
+ e->inode = inode;
+ e->details = details;
+
+ tprints(details);
+ return 1;
+}
+
+bool
+print_sockaddr_by_inode_cached(const unsigned long inode)
+{
+ const cache_entry *const e = &cache[inode & CACHE_MASK];
+ if (e && inode == e->inode) {
+ tprints(e->details);
+ return true;
+ }
+ return false;
+}
+
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;
}
char src_buf[text_size];
+ char *details;
if (!inet_ntop(diag_msg->idiag_family, diag_msg->id.idiag_src,
src_buf, text_size))
dst_buf, text_size))
return -1;
- tprintf("%s:[%s:%u->%s:%u]",
- proto_name,
- src_buf, ntohs(diag_msg->id.idiag_sport),
- dst_buf, ntohs(diag_msg->id.idiag_dport));
+ if (asprintf(&details, "%s:[%s:%u->%s:%u]", proto_name,
+ src_buf, ntohs(diag_msg->id.idiag_sport),
+ dst_buf, ntohs(diag_msg->id.idiag_dport)) < 0)
+ return false;
} else {
- tprintf("%s:[%s:%u]", proto_name, src_buf,
- ntohs(diag_msg->id.idiag_sport));
+ if (asprintf(&details, "%s:[%s:%u]", proto_name, src_buf,
+ ntohs(diag_msg->id.idiag_sport)) < 0)
+ return false;
}
- return 1;
+ return cache_and_print_inode_details(inode, details);
}
static bool
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),
.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
* print obtained information in the following format:
* "UNIX:[" SELF_INODE [ "->" PEER_INODE ][ "," SOCKET_FILE ] "]"
*/
- if (peer || path_len) {
- tprintf("%s:[%lu", proto_name, inode);
- if (peer)
- tprintf("->%u", peer);
- if (path_len) {
- if (path[0] == '\0') {
- tprints(",@");
- print_quoted_string(path + 1, path_len,
- QUOTE_0_TERMINATED);
- } else {
- tprints(",");
- print_quoted_string(path, path_len + 1,
- QUOTE_0_TERMINATED);
- }
+ if (!peer && !path_len)
+ return -1;
+
+ char peer_str[3 + sizeof(peer) * 3];
+ if (peer)
+ snprintf(peer_str, sizeof(peer_str), "->%u", peer);
+ else
+ peer_str[0] = '\0';
+
+ const char *path_str;
+ if (path_len) {
+ char *outstr = alloca(4 * path_len + 4);
+
+ outstr[0] = ',';
+ if (path[0] == '\0') {
+ outstr[1] = '@';
+ string_quote(path + 1, outstr + 2,
+ path_len - 1, QUOTE_0_TERMINATED);
+ } else {
+ string_quote(path, outstr + 1,
+ path_len, QUOTE_0_TERMINATED);
}
- tprints("]");
- return 1;
+ path_str = outstr;
+ } else {
+ path_str = "";
}
- else
+
+ char *details;
+ if (asprintf(&details, "%s:[%lu%s%s]", proto_name, inode,
+ peer_str, path_str) < 0)
return -1;
+
+ 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(int fd, const unsigned long inode)
+unix_print(const int fd, const unsigned long inode)
{
return unix_send_query(fd, inode)
&& receive_responses(fd, inode, "UNIX", unix_parse_response);
}
+static bool
+tcp_v4_print(const int fd, const unsigned long inode)
+{
+ return inet_print(fd, AF_INET, IPPROTO_TCP, inode, "TCP");
+}
+
+static bool
+udp_v4_print(const int fd, const unsigned long inode)
+{
+ return inet_print(fd, AF_INET, IPPROTO_UDP, inode, "UDP");
+}
+
+static bool
+tcp_v6_print(const int fd, const unsigned long inode)
+{
+ return inet_print(fd, AF_INET6, IPPROTO_TCP, inode, "TCPv6");
+}
+
+static bool
+udp_v6_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 *proto_name)
+print_sockaddr_by_inode(const unsigned long inode, const enum sock_proto proto)
{
- int fd;
- bool r = false;
+ if ((unsigned int) proto >= ARRAY_SIZE(protocols) ||
+ (proto != SOCK_PROTO_UNKNOWN && !protocols[proto].print))
+ return false;
- fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG);
+ const int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_SOCK_DIAG);
if (fd < 0)
return false;
+ bool r = false;
- if (proto_name) {
- if (strcmp(proto_name, "TCP") == 0)
- r = inet_print(fd, AF_INET, IPPROTO_TCP, inode, "TCP");
- else if (strcmp(proto_name, "UDP") == 0)
- r = inet_print(fd, AF_INET, IPPROTO_UDP, inode, "UDP");
- else if (strcmp(proto_name, "TCPv6") == 0)
- r = inet_print(fd, AF_INET6, IPPROTO_TCP, inode, "TCPv6");
- else if (strcmp(proto_name, "UDPv6") == 0)
- r = inet_print(fd, AF_INET6, IPPROTO_UDP, inode, "UDPv6");
- else if (strcmp(proto_name, "UNIX") == 0)
- r = unix_print(fd, inode);
-
+ 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 {
- const struct {
- const int family;
- const int protocol;
- const char *name;
- } protocols[] = {
- { AF_INET, IPPROTO_TCP, "TCP" },
- { AF_INET, IPPROTO_UDP, "UDP" },
- { AF_INET6, IPPROTO_TCP, "TCPv6" },
- { AF_INET6, IPPROTO_UDP, "UDPv6" }
- };
- size_t i;
-
- for (i = 0; i < ARRAY_SIZE(protocols); ++i) {
- if ((r = inet_print(fd, protocols[i].family,
- protocols[i].protocol, inode,
- protocols[i].name)))
+ 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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