netstat: optional -p support by L. Gabriel Somlo <somlo AT cmu.edu>
Without FEATURE_NETSTAT_PRG: function old new delta recursive_action 416 425 +9 tcp_do_one 420 428 +8 udp_do_one 492 499 +7 raw_do_one 472 479 +7 expand 1697 1701 +4 netstat_main 489 492 +3 unix_do_one 486 488 +2 flags 1 - -1 qgravechar 109 106 -3 net_conn_line 4 - -4 bbunpack 391 383 -8 ------------------------------------------------------------------------------ (add/remove: 0/2 grow/shrink: 7/2 up/down: 40/-16) Total: 24 bytes With FEATURE_NETSTAT_PRG: file_act - 213 +213 dir_act - 192 +192 netstat_main 489 601 +112 prg_cache_get - 50 +50 tcp_do_one 420 462 +42 udp_do_one 492 533 +41 raw_do_one 472 513 +41 unix_do_one 486 519 +33 recursive_action 416 425 +9 expand 1697 1701 +4 flags 1 - -1 qgravechar 109 106 -3 net_conn_line 4 - -4 bbunpack 391 383 -8 packed_usage 24586 24572 -14 ------------------------------------------------------------------------------ (add/remove: 3/2 grow/shrink: 7/3 up/down: 737/-30) Total: 707 bytes
This commit is contained in:
Denis Vlasenko
parent
94d03f0da0
commit
6e69e4237d
@ -278,6 +278,7 @@ enum {
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ACTION_FOLLOWLINKS_L0 = (1 << 2),
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ACTION_DEPTHFIRST = (1 << 3),
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/*ACTION_REVERSE = (1 << 4), - unused */
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ACTION_QUIET = (1 << 5),
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};
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extern int recursive_action(const char *fileName, unsigned flags,
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int FAST_FUNC (*fileAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
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@ -2820,7 +2820,7 @@
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#endif
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#define netstat_trivial_usage \
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"[-laentuwxr"USE_FEATURE_NETSTAT_WIDE("W")"]"
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"[-laentuwxr"USE_FEATURE_NETSTAT_WIDE("W")USE_FEATURE_NETSTAT_PRG("p")"]"
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#define netstat_full_usage "\n\n" \
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"Display networking information\n" \
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"\nOptions:" \
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@ -2835,6 +2835,9 @@
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"\n -r Display routing table" \
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USE_FEATURE_NETSTAT_WIDE( \
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"\n -W Display with no column truncation" \
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) \
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USE_FEATURE_NETSTAT_PRG( \
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"\n -p Display PID/Program name for sockets" \
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)
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#define nice_trivial_usage \
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@ -141,6 +141,7 @@ int FAST_FUNC recursive_action(const char *fileName,
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return status;
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done_nak_warn:
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if (!(flags & ACTION_QUIET))
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bb_simple_perror_msg(fileName);
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return FALSE;
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}
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@ -633,6 +633,14 @@ config FEATURE_NETSTAT_WIDE
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Add support for wide columns. Useful when displaying IPv6 addresses
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(-W option).
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config FEATURE_NETSTAT_PRG
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bool "Enable PID/Program name output"
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default n
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depends on NETSTAT
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help
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Add support for -p flag to print out PID and program name.
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+700 bytes of code.
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config NSLOOKUP
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bool "nslookup"
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default n
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@ -8,18 +8,37 @@
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* 2002-04-20
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* IPV6 support added by Bart Visscher <magick@linux-fan.com>
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*
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* 2008-07-10
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* optional '-p' flag support ported from net-tools by G. Somlo <somlo@cmu.edu>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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#include "inet_common.h"
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#define NETSTAT_OPTS "laentuwx" \
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USE_ROUTE( "r") \
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USE_FEATURE_NETSTAT_WIDE("W") \
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USE_FEATURE_NETSTAT_PRG( "p")
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enum {
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OPT_extended = 0x4,
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OPT_showroute = 0x100,
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OPT_widedisplay = 0x200 * ENABLE_FEATURE_NETSTAT_WIDE,
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OPTBIT_KEEP_OLD = 7,
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USE_ROUTE( OPTBIT_ROUTE,)
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USE_FEATURE_NETSTAT_WIDE(OPTBIT_WIDE ,)
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USE_FEATURE_NETSTAT_PRG( OPTBIT_PRG ,)
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OPT_sock_listen = 1 << 0, // l
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OPT_sock_all = 1 << 1, // a
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OPT_extended = 1 << 2, // e
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OPT_noresolve = 1 << 3, // n
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OPT_sock_tcp = 1 << 4, // t
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OPT_sock_udp = 1 << 5, // u
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OPT_sock_raw = 1 << 6, // w
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OPT_sock_unix = 1 << 7, // x
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OPT_route = USE_ROUTE( (1 << OPTBIT_ROUTE)) + 0, // r
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OPT_wide = USE_FEATURE_NETSTAT_WIDE((1 << OPTBIT_WIDE )) + 0, // W
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OPT_prg = USE_FEATURE_NETSTAT_PRG( (1 << OPTBIT_PRG )) + 0, // p
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};
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# define NETSTAT_OPTS "laentuwxr"USE_FEATURE_NETSTAT_WIDE("W")
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#define NETSTAT_CONNECTED 0x01
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#define NETSTAT_LISTENING 0x02
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@ -31,7 +50,6 @@ enum {
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#define NETSTAT_UNIX 0x80
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#define NETSTAT_ALLPROTO (NETSTAT_TCP|NETSTAT_UDP|NETSTAT_RAW|NETSTAT_UNIX)
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static smallint flags = NETSTAT_CONNECTED | NETSTAT_ALLPROTO;
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enum {
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TCP_ESTABLISHED = 1,
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@ -44,7 +62,7 @@ enum {
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TCP_CLOSE_WAIT,
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TCP_LAST_ACK,
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TCP_LISTEN,
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TCP_CLOSING /* now a valid state */
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TCP_CLOSING, /* now a valid state */
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};
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static const char *const tcp_state[] = {
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@ -76,8 +94,8 @@ typedef enum {
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/* Standard printout size */
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#define PRINT_IP_MAX_SIZE 23
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#define PRINT_NET_CONN "%s %6ld %6ld %-23s %-23s %-12s\n"
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#define PRINT_NET_CONN_HEADER "\nProto Recv-Q Send-Q %-23s %-23s State\n"
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#define PRINT_NET_CONN "%s %6ld %6ld %-23s %-23s %-12s"
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#define PRINT_NET_CONN_HEADER "\nProto Recv-Q Send-Q %-23s %-23s State "
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/* When there are IPv6 connections the IPv6 addresses will be
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* truncated to none-recognition. The '-W' option makes the
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@ -86,10 +104,201 @@ typedef enum {
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* xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:ddd.ddd.ddd.ddd
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*/
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#define PRINT_IP_MAX_SIZE_WIDE 51 /* INET6_ADDRSTRLEN + 5 for the port number */
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#define PRINT_NET_CONN_WIDE "%s %6ld %6ld %-51s %-51s %-12s\n"
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#define PRINT_NET_CONN_HEADER_WIDE "\nProto Recv-Q Send-Q %-51s %-51s State\n"
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#define PRINT_NET_CONN_WIDE "%s %6ld %6ld %-51s %-51s %-12s"
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#define PRINT_NET_CONN_HEADER_WIDE "\nProto Recv-Q Send-Q %-51s %-51s State "
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static const char *net_conn_line = PRINT_NET_CONN;
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#define PROGNAME_WIDTH 20
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#define PROGNAME_WIDTH_STR "20"
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/* PROGNAME_WIDTH chars: 12345678901234567890 */
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#define PROGNAME_BANNER "PID/Program name "
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struct prg_node {
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struct prg_node *next;
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long inode;
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char name[PROGNAME_WIDTH];
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};
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#define PRG_HASH_SIZE 211
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struct globals {
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const char *net_conn_line;
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smallint flags;
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#if ENABLE_FEATURE_NETSTAT_PRG
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smallint prg_cache_loaded;
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struct prg_node *prg_hash[PRG_HASH_SIZE];
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#endif
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};
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#define G (*ptr_to_globals)
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#define flags (G.flags )
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#define net_conn_line (G.net_conn_line )
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#define prg_hash (G.prg_hash )
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#define prg_cache_loaded (G.prg_cache_loaded)
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#define INIT_G() do { \
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SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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flags = NETSTAT_CONNECTED | NETSTAT_ALLPROTO; \
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net_conn_line = PRINT_NET_CONN; \
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} while (0)
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#if ENABLE_FEATURE_NETSTAT_PRG
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/* Deliberately truncating long to unsigned *int* */
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#define PRG_HASHIT(x) ((unsigned)(x) % PRG_HASH_SIZE)
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#define print_progname_banner() do { \
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if (option_mask32 & OPT_prg) printf(PROGNAME_BANNER); \
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} while (0)
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static void prg_cache_add(long inode, char *name)
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{
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unsigned hi = PRG_HASHIT(inode);
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struct prg_node **pnp, *pn;
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prg_cache_loaded = 2;
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for (pnp = prg_hash + hi; (pn = *pnp) != NULL; pnp = &pn->next) {
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if (pn->inode == inode) {
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/* Some warning should be appropriate here
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as we got multiple processes for one i-node */
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return;
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}
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}
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*pnp = xzalloc(sizeof(struct prg_node));
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pn = *pnp;
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pn->inode = inode;
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safe_strncpy(pn->name, name, PROGNAME_WIDTH);
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}
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static const char *prg_cache_get(long inode)
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{
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unsigned hi = PRG_HASHIT(inode);
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struct prg_node *pn;
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for (pn = prg_hash[hi]; pn; pn = pn->next)
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if (pn->inode == inode)
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return pn->name;
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return "-";
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}
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#if ENABLE_FEATURE_CLEAN_UP
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static void prg_cache_clear(void)
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{
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struct prg_node **pnp, *pn;
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for (pnp = prg_hash; pnp < prg_hash + PRG_HASH_SIZE; pnp++) {
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while ((pn = *pnp) != NULL) {
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*pnp = pn->next;
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free(pn);
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}
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}
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}
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#else
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#define prg_cache_clear() ((void)0)
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#endif
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static long extract_socket_inode(const char *lname) {
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long inode = -1;
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if (strncmp(lname, "socket:[", sizeof("socket:[")-1) == 0) {
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/* "socket:[12345]", extract the "12345" as inode */
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inode = bb_strtol(lname + sizeof("socket:[")-1, (char**)&lname, 0);
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if (*lname != ']')
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inode = -1;
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} else if (strncmp(lname, "[0000]:", sizeof("[0000]:")-1) == 0) {
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/* "[0000]:12345", extract the "12345" as inode */
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inode = bb_strtol(lname + sizeof("[0000]:")-1, NULL, 0);
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if (errno) /* not NUL terminated? */
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inode = -1;
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}
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#if 0 /* bb_strtol returns all-ones bit pattern on ERANGE anyway */
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if (errno == ERANGE)
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inode = -1;
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#endif
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return inode;
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}
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static int FAST_FUNC file_act(const char *fileName,
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struct stat *statbuf UNUSED_PARAM,
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void *userData,
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int depth UNUSED_PARAM)
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{
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char *linkname;
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long inode;
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linkname = xmalloc_readlink(fileName);
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if (linkname != NULL) {
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inode = extract_socket_inode(linkname);
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free(linkname);
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if (inode >= 0)
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prg_cache_add(inode, (char *)userData);
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}
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return TRUE;
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}
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static int FAST_FUNC dir_act(const char *fileName,
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struct stat *statbuf UNUSED_PARAM,
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void *userData UNUSED_PARAM,
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int depth)
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{
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const char *shortName;
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char *p, *q;
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char cmdline_buf[512];
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int i;
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if (depth == 0) /* "/proc" itself */
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return TRUE; /* continue looking one level below /proc */
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shortName = fileName + sizeof("/proc/")-1; /* point after "/proc/" */
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if (!isdigit(shortName[0])) /* skip /proc entries whic aren't processes */
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return SKIP;
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p = concat_path_file(fileName, "cmdline"); /* "/proc/PID/cmdline" */
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i = open_read_close(p, cmdline_buf, sizeof(cmdline_buf) - 1);
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free(p);
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if (i < 0)
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return FALSE;
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cmdline_buf[i] = '\0';
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q = concat_path_file(shortName, bb_basename(cmdline_buf)); /* "PID/argv0" */
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/* go through all files in /proc/PID/fd */
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p = concat_path_file(fileName, "fd");
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i = recursive_action(p, ACTION_RECURSE | ACTION_QUIET,
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file_act, NULL, (void *)q, 0);
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free(p);
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free(q);
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if (!i)
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return FALSE; /* signal permissions error to caller */
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return SKIP; /* caller should not recurse further into this dir. */
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}
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static void prg_cache_load(void)
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{
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int load_ok;
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prg_cache_loaded = 1;
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load_ok = recursive_action("/proc", ACTION_RECURSE | ACTION_QUIET,
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NULL, dir_act, NULL, 0);
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if (load_ok)
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return;
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if (prg_cache_loaded == 1)
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bb_error_msg("can't scan /proc - are you root?");
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else
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bb_error_msg("showing only processes with your user ID");
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}
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#else
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#define prg_cache_clear() ((void)0)
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#define print_progname_banner() ((void)0)
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#endif //ENABLE_FEATURE_NETSTAT_PRG
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#if ENABLE_FEATURE_IPV6
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@ -195,6 +404,11 @@ static int tcp_do_one(int lnr, char *line)
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"tcp", flags & NETSTAT_NUMERIC);
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printf(net_conn_line,
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"tcp", rxq, txq, l, r, tcp_state[state]);
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#if ENABLE_FEATURE_NETSTAT_PRG
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if (option_mask32 & OPT_prg)
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printf("%."PROGNAME_WIDTH_STR"s", prg_cache_get(inode));
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#endif
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bb_putchar('\n');
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free(l);
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free(r);
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}
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@ -276,6 +490,11 @@ static int udp_do_one(int lnr, char *line)
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"udp", flags & NETSTAT_NUMERIC);
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printf(net_conn_line,
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"udp", rxq, txq, l, r, state_str);
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#if ENABLE_FEATURE_NETSTAT_PRG
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if (option_mask32 & OPT_prg)
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printf("%."PROGNAME_WIDTH_STR"s", prg_cache_get(inode));
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#endif
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bb_putchar('\n');
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free(l);
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free(r);
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}
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@ -332,6 +551,11 @@ static int raw_do_one(int lnr, char *line)
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"raw", flags & NETSTAT_NUMERIC);
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printf(net_conn_line,
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"raw", rxq, txq, l, r, itoa(state));
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#if ENABLE_FEATURE_NETSTAT_PRG
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if (option_mask32 & OPT_prg)
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printf("%-"PROGNAME_WIDTH_STR"s", prg_cache_get(inode));
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#endif
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bb_putchar('\n');
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free(l);
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free(r);
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}
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@ -443,6 +667,11 @@ static int unix_do_one(int nr, char *line)
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ss_proto, refcnt, ss_flags, ss_type, ss_state, inode
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);
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#if ENABLE_FEATURE_NETSTAT_PRG
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if (option_mask32 & OPT_prg)
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printf("%-"PROGNAME_WIDTH_STR"s", prg_cache_get(inode));
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#endif
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/* TODO: currently we stop at first NUL byte. Is it a problem? */
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line += path_ofs;
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*strchrnul(line, '\n') = '\0';
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@ -497,6 +726,8 @@ int netstat_main(int argc UNUSED_PARAM, char **argv)
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enum { inet = 1, inet6 = 0 };
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#endif
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INIT_G();
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/* Option string must match NETSTAT_xxx constants */
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opt = getopt32(argv, NETSTAT_OPTS);
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if (opt & 0x1) { // -l
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@ -510,7 +741,7 @@ int netstat_main(int argc UNUSED_PARAM, char **argv)
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//if (opt & 0x20) // -u: NETSTAT_UDP
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//if (opt & 0x40) // -w: NETSTAT_RAW
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//if (opt & 0x80) // -x: NETSTAT_UNIX
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if (opt & OPT_showroute) { // -r
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if (opt & OPT_route) { // -r
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#if ENABLE_ROUTE
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bb_displayroutes(flags & NETSTAT_NUMERIC, !(opt & OPT_extended));
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return 0;
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@ -518,11 +749,15 @@ int netstat_main(int argc UNUSED_PARAM, char **argv)
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bb_show_usage();
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#endif
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}
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if (opt & OPT_widedisplay) { // -W
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if (opt & OPT_wide) { // -W
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net_conn_line = PRINT_NET_CONN_WIDE;
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net_conn_line_header = PRINT_NET_CONN_HEADER_WIDE;
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}
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#if ENABLE_FEATURE_NETSTAT_PRG
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if (opt & OPT_prg) { // -p
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prg_cache_load();
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}
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#endif
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opt &= NETSTAT_ALLPROTO;
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if (opt) {
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@ -539,23 +774,25 @@ int netstat_main(int argc UNUSED_PARAM, char **argv)
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else
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printf("(w/o servers)");
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printf(net_conn_line_header, "Local Address", "Foreign Address");
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print_progname_banner();
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bb_putchar('\n');
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}
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if (inet && flags & NETSTAT_TCP)
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if (inet && (flags & NETSTAT_TCP))
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do_info(_PATH_PROCNET_TCP, "AF INET (tcp)", tcp_do_one);
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#if ENABLE_FEATURE_IPV6
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if (inet6 && flags & NETSTAT_TCP)
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if (inet6 && (flags & NETSTAT_TCP))
|
||||
do_info(_PATH_PROCNET_TCP6, "AF INET6 (tcp)", tcp_do_one);
|
||||
#endif
|
||||
if (inet && flags & NETSTAT_UDP)
|
||||
if (inet && (flags & NETSTAT_UDP))
|
||||
do_info(_PATH_PROCNET_UDP, "AF INET (udp)", udp_do_one);
|
||||
#if ENABLE_FEATURE_IPV6
|
||||
if (inet6 && flags & NETSTAT_UDP)
|
||||
if (inet6 && (flags & NETSTAT_UDP))
|
||||
do_info(_PATH_PROCNET_UDP6, "AF INET6 (udp)", udp_do_one);
|
||||
#endif
|
||||
if (inet && flags & NETSTAT_RAW)
|
||||
if (inet && (flags & NETSTAT_RAW))
|
||||
do_info(_PATH_PROCNET_RAW, "AF INET (raw)", raw_do_one);
|
||||
#if ENABLE_FEATURE_IPV6
|
||||
if (inet6 && flags & NETSTAT_RAW)
|
||||
if (inet6 && (flags & NETSTAT_RAW))
|
||||
do_info(_PATH_PROCNET_RAW6, "AF INET6 (raw)", raw_do_one);
|
||||
#endif
|
||||
if (flags & NETSTAT_UNIX) {
|
||||
@ -566,8 +803,11 @@ int netstat_main(int argc UNUSED_PARAM, char **argv)
|
||||
printf("(only servers)");
|
||||
else
|
||||
printf("(w/o servers)");
|
||||
printf("\nProto RefCnt Flags Type State I-Node Path\n");
|
||||
printf("\nProto RefCnt Flags Type State I-Node ");
|
||||
print_progname_banner();
|
||||
printf("Path\n");
|
||||
do_info(_PATH_PROCNET_UNIX, "AF UNIX", unix_do_one);
|
||||
}
|
||||
prg_cache_clear();
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user