1 /* netstat.c - Display Linux networking subsystem.
2 *
3 * Copyright 2012 Ranjan Kumar <ranjankumar.bth@gmail.com>
4 * Copyright 2013 Kyungwan Han <asura321@gmail.com>
5 *
6 * Not in SUSv4.
7 *
8 USE_NETSTAT(NEWTOY(netstat, "pWrxwutneal", TOYFLAG_BIN))
9 config NETSTAT
10 bool "netstat"
11 default n
12 help
13 usage: netstat [-pWrxwutneal]
14
15 Display networking information.
16
17 -r Display routing table.
18 -a Display all sockets (Default: Connected).
19 -l Display listening server sockets.
20 -t Display TCP sockets.
21 -u Display UDP sockets.
22 -w Display Raw sockets.
23 -x Display Unix sockets.
24 -e Display other/more information.
25 -n Don't resolve names.
26 -W Wide Display.
27 -p Display PID/Program name for sockets.
28 */
29
30 #define FOR_netstat
31 #include "toys.h"
32
33 #include <net/route.h>
34
35 GLOBALS(
36 char current_name[21];
37 int some_process_unidentified;
38 );
39
40 typedef union _iaddr {
41 unsigned u;
42 unsigned char b[4];
43 } iaddr;
44
45 typedef union _iaddr6 {
46 struct {
47 unsigned a;
48 unsigned b;
49 unsigned c;
50 unsigned d;
51 } u;
52 unsigned char b[16];
53 } iaddr6;
54
55 #define ADDR_LEN (INET6_ADDRSTRLEN + 1 + 5 + 1)//IPv6 addr len + : + port + '\0'
56
57 //For unix states
58 enum {
59 SOCK_ACCEPTCON = (1 << 16), //performed a listen.
60 SOCK_WAIT_DATA = (1 << 17), //wait data to read.
61 SOCK_NO_SPACE = (1 << 18), //no space to write.
62 };
63
64 #define SOCK_NOT_CONNECTED 1
65
66 typedef struct _pidlist {
67 struct _pidlist *next;
68 long inode;
69 char name[21];
70 } PID_LIST;
71
72 PID_LIST *pid_list = NULL;
73
74 /*
75 * used to convert string into int and
76 * validate the input str for invalid int value or out-of-range.
77 */
get_strtou(char * str,char ** endp,int base)78 static unsigned long get_strtou(char *str, char **endp, int base)
79 {
80 unsigned long uli;
81 char *endptr;
82
83 if (!isalnum(str[0])) {
84 errno = ERANGE;
85 return UINT_MAX;
86 }
87 errno = 0;
88 uli = strtoul(str, &endptr, base);
89 if (uli > UINT_MAX) {
90 errno = ERANGE;
91 return UINT_MAX;
92 }
93
94 if (endp) *endp = endptr;
95 if (endptr[0]) {
96 if (isalnum(endptr[0]) || errno) { //"123abc" or out-of-range
97 errno = ERANGE;
98 return UINT_MAX;
99 }
100 errno = EINVAL;
101 }
102 return uli;
103 }
104
105 /*
106 * used to retrive pid name from pid list.
107 */
get_pid_name(unsigned long inode)108 static const char *get_pid_name(unsigned long inode)
109 {
110 PID_LIST *tmp;
111
112 for (tmp = pid_list; tmp; tmp = tmp->next)
113 if (tmp->inode == inode) return tmp->name;
114
115 return "-";
116 }
117
118 /*
119 * For TCP/UDP/RAW display data.
120 */
display_data(unsigned rport,char * label,unsigned rxq,unsigned txq,char * lip,char * rip,unsigned state,unsigned uid,unsigned long inode)121 static void display_data(unsigned rport, char *label,
122 unsigned rxq, unsigned txq, char *lip, char *rip,
123 unsigned state, unsigned uid, unsigned long inode)
124 {
125 char *ss_state = "UNKNOWN", buf[12];
126 char *state_label[] = {"", "ESTABLISHED", "SYN_SENT", "SYN_RECV", "FIN_WAIT1",
127 "FIN_WAIT2", "TIME_WAIT", "CLOSE", "CLOSE_WAIT",
128 "LAST_ACK", "LISTEN", "CLOSING", "UNKNOWN"};
129 char user[11];
130 struct passwd *pw;
131
132 if (!strcmp(label, "tcp")) {
133 int sz = ARRAY_LEN(state_label);
134 if (!state || state >= sz) state = sz-1;
135 ss_state = state_label[state];
136 }
137 else if (!strcmp(label, "udp")) {
138 if (state == 1) ss_state = state_label[state];
139 else if (state == 7) ss_state = "";
140 }
141 else if (!strcmp(label, "raw")) sprintf(ss_state = buf, "%u", state);
142
143 if (!(toys.optflags & FLAG_n) && (pw = getpwuid(uid))) {
144 snprintf(user, sizeof(user), "%s", pw->pw_name);
145 } else snprintf(user, sizeof(user), "%d", uid);
146
147 xprintf("%3s %6d %6d ", label, rxq, txq);
148 xprintf((toys.optflags & FLAG_W) ? "%-51.51s %-51.51s " : "%-23.23s %-23.23s "
149 , lip, rip);
150 xprintf("%-11s ", ss_state);
151 if ((toys.optflags & FLAG_e)) xprintf("%-10s %-11ld ", user, inode);
152 if ((toys.optflags & FLAG_p)) xprintf("%s", get_pid_name(inode));
153 xputc('\n');
154 }
155
156 /*
157 * For TCP/UDP/RAW show data.
158 */
show_data(unsigned rport,char * label,unsigned rxq,unsigned txq,char * lip,char * rip,unsigned state,unsigned uid,unsigned long inode)159 static void show_data(unsigned rport, char *label, unsigned rxq, unsigned txq,
160 char *lip, char *rip, unsigned state, unsigned uid,
161 unsigned long inode)
162 {
163 if (toys.optflags & FLAG_l) {
164 if (!rport && (state & 0xA))
165 display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
166 } else if (toys.optflags & FLAG_a)
167 display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
168 //rport && (TCP | UDP | RAW)
169 else if (rport & (0x10 | 0x20 | 0x40))
170 display_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
171 }
172
173 /*
174 * used to get service name.
175 */
get_servname(int port,char * label)176 static char *get_servname(int port, char *label)
177 {
178 int lport = htons(port);
179 if (!lport) return xmprintf("%s", "*");
180 struct servent *ser = getservbyport(lport, label);
181 if (ser) return xmprintf("%s", ser->s_name);
182 return xmprintf("%u", (unsigned)ntohs(lport));
183 }
184
185 /*
186 * used to convert address into text format.
187 */
addr2str(int af,void * addr,unsigned port,char * buf,char * label)188 static void addr2str(int af, void *addr, unsigned port, char *buf, char *label)
189 {
190 char ip[ADDR_LEN] = {0,};
191 if (!inet_ntop(af, addr, ip, ADDR_LEN)) {
192 *buf = '\0';
193 return;
194 }
195 size_t iplen = strlen(ip);
196 if (!port) {
197 strncat(ip+iplen, ":*", ADDR_LEN-iplen-1);
198 memcpy(buf, ip, ADDR_LEN);
199 return;
200 }
201
202 if (!(toys.optflags & FLAG_n)) {
203 struct addrinfo hints, *result, *rp;
204
205 memset(&hints, 0, sizeof(struct addrinfo));
206 hints.ai_family = af;
207
208 if (!getaddrinfo(ip, NULL, &hints, &result)) {
209 char hbuf[NI_MAXHOST] = {0,}, sbuf[NI_MAXSERV] = {0,};
210 socklen_t sock_len;
211 char *sname = NULL;
212 int plen = 0;
213
214 if (af == AF_INET) sock_len = sizeof(struct sockaddr_in);
215 else sock_len = sizeof(struct sockaddr_in6);
216
217 for (rp = result; rp; rp = rp->ai_next)
218 if (!getnameinfo(rp->ai_addr, sock_len, hbuf, sizeof(hbuf), sbuf,
219 sizeof(sbuf), NI_NUMERICSERV))
220 break;
221
222 freeaddrinfo(result);
223 sname = get_servname(port, label);
224 plen = strlen(sname);
225 if (*hbuf) {
226 memset(ip, 0, ADDR_LEN);
227 memcpy(ip, hbuf, (ADDR_LEN - plen - 2));
228 iplen = strlen(ip);
229 }
230 snprintf(ip + iplen, ADDR_LEN-iplen, ":%s", sname);
231 free(sname);
232 }
233 }
234 else snprintf(ip+iplen, ADDR_LEN-iplen, ":%d", port);
235 memcpy(buf, ip, ADDR_LEN);
236 }
237
238 /*
239 * display ipv4 info for TCP/UDP/RAW.
240 */
show_ipv4(char * fname,char * label)241 static void show_ipv4(char *fname, char *label)
242 {
243 FILE *fp = fopen(fname, "r");
244 if (!fp) {
245 perror_msg("'%s'", fname);
246 return;
247 }
248
249 if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
250
251 while (fgets(toybuf, sizeof(toybuf), fp)) {
252 char lip[ADDR_LEN] = {0,}, rip[ADDR_LEN] = {0,};
253 iaddr laddr, raddr;
254 unsigned lport, rport, state, txq, rxq, num, uid;
255 unsigned long inode;
256
257 int nitems = sscanf(toybuf, " %d: %x:%x %x:%x %x %x:%x %*X:%*X %*X %d %*d %ld",
258 &num, &laddr.u, &lport, &raddr.u, &rport, &state, &txq,
259 &rxq, &uid, &inode);
260 if (nitems == 10) {
261 addr2str(AF_INET, &laddr, lport, lip, label);
262 addr2str(AF_INET, &raddr, rport, rip, label);
263 show_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
264 }
265 }//End of While
266 fclose(fp);
267 }
268
269 /*
270 * display ipv6 info for TCP/UDP/RAW.
271 */
show_ipv6(char * fname,char * label)272 static void show_ipv6(char *fname, char *label)
273 {
274 FILE *fp = fopen(fname, "r");
275 if (!fp) {
276 perror_msg("'%s'", fname);
277 return;
278 }
279
280 if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
281
282 while (fgets(toybuf, sizeof(toybuf), fp)) {
283 char lip[ADDR_LEN] = {0,}, rip[ADDR_LEN] = {0,};
284 iaddr6 laddr6, raddr6;
285 unsigned lport, rport, state, txq, rxq, num, uid;
286 unsigned long inode;
287 int nitems = sscanf(toybuf, " %d: %8x%8x%8x%8x:%x %8x%8x%8x%8x:%x %x %x:%x "
288 "%*X:%*X %*X %d %*d %ld",
289 &num, &laddr6.u.a, &laddr6.u.b, &laddr6.u.c,
290 &laddr6.u.d, &lport, &raddr6.u.a, &raddr6.u.b,
291 &raddr6.u.c, &raddr6.u.d, &rport, &state, &txq, &rxq,
292 &uid, &inode);
293 if (nitems == 16) {
294 addr2str(AF_INET6, &laddr6, lport, lip, label);
295 addr2str(AF_INET6, &raddr6, rport, rip, label);
296 show_data(rport, label, rxq, txq, lip, rip, state, uid, inode);
297 }
298 }//End of While
299 fclose(fp);
300 }
301
302 /*
303 * display unix socket info.
304 */
show_unix_sockets(char * fname,char * label)305 static void show_unix_sockets(char *fname, char *label)
306 {
307 FILE *fp = fopen((char *)fname, "r");
308 if (!fp) {
309 perror_msg("'%s'", fname);
310 return;
311 }
312
313 if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
314
315 while (fgets(toybuf, sizeof(toybuf), fp)) {
316 unsigned long refcount, label, flags, inode;
317 int nitems = 0, path_offset = 0, type, state;
318 char sock_flags[32] = {0,}, *sock_type, *sock_state, *bptr = toybuf, *term;
319
320 if (!toybuf[0]) continue;
321
322 nitems = sscanf(toybuf, "%*p: %lX %lX %lX %X %X %lu %n",
323 &refcount, &label, &flags, &type, &state, &inode, &path_offset);
324
325 //for state one less
326 if (nitems < 6) break;
327
328 if (toys.optflags & FLAG_l) {
329 if ( !((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) )
330 continue;
331 } else if (!(toys.optflags & FLAG_a)) {
332 if ((state == SOCK_NOT_CONNECTED) && (flags & SOCK_ACCEPTCON)) continue;
333 }
334
335 //prepare socket type, state and flags.
336 {
337 char *ss_type[] = { "", "STREAM", "DGRAM", "RAW", "RDM", "SEQPACKET",
338 "UNKNOWN"};
339 char *ss_state[] = { "FREE", "LISTENING", "CONNECTING", "CONNECTED",
340 "DISCONNECTING", "UNKNOWN"};
341
342 int sz = ARRAY_LEN(ss_type);//sizeof(ss_type)/sizeof(ss_type[0]);
343 if ( (type < SOCK_STREAM) || (type > SOCK_SEQPACKET) )
344 sock_type = ss_type[sz-1];
345 else sock_type = ss_type[type];
346
347 sz = ARRAY_LEN(ss_state);//sizeof(ss_state)/sizeof(ss_state[0]);
348 if ((state < 0) || (state > sz-2)) sock_state = ss_state[sz-1];
349 else if (state == SOCK_NOT_CONNECTED) {
350 if (flags & SOCK_ACCEPTCON) sock_state = ss_state[state];
351 else sock_state = " ";
352 } else sock_state = ss_state[state];
353
354 strcpy(sock_flags, "[ ");
355 if (flags & SOCK_ACCEPTCON) strcat(sock_flags, "ACC ");
356 if (flags & SOCK_WAIT_DATA) strcat(sock_flags, "W ");
357 if (flags & SOCK_NO_SPACE) strcat(sock_flags, "N ");
358 strcat(sock_flags, "]");
359 }
360 xprintf("%-5s %-6ld %-11s %-10s %-13s %8lu ", (!label ? "unix" : "??"),
361 refcount, sock_flags, sock_type, sock_state, inode);
362 if (toys.optflags & FLAG_p) xprintf("%-20s", get_pid_name(inode));
363
364 bptr += path_offset;
365 if ((term = strchr(bptr, '\n'))) *term = '\0';
366 xprintf("%s\n", bptr);
367 }//End of while
368 fclose(fp);
369 }
370
371 /*
372 * extract inode value from the link.
373 */
ss_inode(char * link)374 static long ss_inode(char *link)
375 {
376 long inode = -1;
377 //"link = socket:[12345]", get "12345" as inode.
378 if (!strncmp(link, "socket:[", sizeof("socket:[")-1)) {
379 inode = get_strtou(link + sizeof("socket:[")-1, (char**)&link, 0);
380 if (*link != ']') inode = -1;
381 }
382 //"link = [0000]:12345", get "12345" as inode.
383 else if (!strncmp(link, "[0000]:", sizeof("[0000]:")-1)) {
384 inode = get_strtou(link + sizeof("[0000]:")-1, NULL, 0);
385 //if not NULL terminated.
386 if (errno) inode = -1;
387 }
388 return inode;
389 }
390
391 /*
392 * add inode and progname in the pid list.
393 */
add2list(long inode)394 static void add2list(long inode)
395 {
396 PID_LIST *node = pid_list;
397
398 for(; node; node = node->next) {
399 if(node->inode == inode)
400 return;
401 }
402
403 PID_LIST *new = (PID_LIST *)xzalloc(sizeof(PID_LIST));
404 new->inode = inode;
405 xstrncpy(new->name, TT.current_name, sizeof(new->name));
406 new->next = pid_list;
407 pid_list = new;
408 }
409
scan_pid_inodes(char * path)410 static void scan_pid_inodes(char *path)
411 {
412 DIR *dp;
413 struct dirent *entry;
414
415 if (!(dp = opendir(path))) {
416 if (errno == EACCES) {
417 TT.some_process_unidentified = 1;
418 return;
419 } else perror_exit("%s", path);
420 }
421 while ((entry = readdir(dp))) {
422 char link_name[64], *link;
423 long inode;
424
425 if (!isdigit(entry->d_name[0])) continue;
426 snprintf(link_name, sizeof(link_name), "%s/%s", path, entry->d_name);
427 link = xreadlink(link_name);
428 if ((inode = ss_inode(link)) != -1) add2list(inode);
429 free(link);
430 }
431 closedir(dp);
432 }
433
scan_pid(int pid)434 static void scan_pid(int pid)
435 {
436 char *line, *p, *fd_dir;
437
438 snprintf(toybuf, sizeof(toybuf), "/proc/%d/cmdline", pid);
439 line = xreadfile(toybuf, 0, 0);
440
441 if ((p = strchr(line, ' '))) *p = 0; // "/bin/netstat -ntp" -> "/bin/netstat"
442 snprintf(TT.current_name, sizeof(TT.current_name), "%d/%s",
443 pid, basename_r(line)); // "584/netstat"
444 free(line);
445
446 fd_dir = xmprintf("/proc/%d/fd", pid);
447 scan_pid_inodes(fd_dir);
448 free(fd_dir);
449 }
450
scan_pids(struct dirtree * node)451 static int scan_pids(struct dirtree *node)
452 {
453 int pid;
454
455 if (!node->parent) return DIRTREE_RECURSE;
456 if ((pid = atol(node->name))) scan_pid(pid);
457
458 return 0;
459 }
460
461 /*
462 * Dealloc pid list.
463 */
clean_pid_list(void)464 static void clean_pid_list(void)
465 {
466 PID_LIST *tmp;
467 while (pid_list) {
468 tmp = pid_list->next;
469 free(pid_list);
470 pid_list = tmp;
471 }
472 }
473
474 /*
475 * For TCP/UDP/RAW show the header.
476 */
show_header(void)477 static void show_header(void)
478 {
479 xprintf("Proto Recv-Q Send-Q ");
480 xprintf((toys.optflags & FLAG_W) ? "%-51s %-51s" : "%-23s %-23s",
481 "Local Address", "Foreign Address");
482 xprintf(" State ");
483 if (toys.optflags & FLAG_e) xprintf(" User Inode ");
484 if (toys.optflags & FLAG_p) xprintf(" PID/Program Name");
485 xputc('\n');
486 }
487
488 /*
489 * used to get the flag values for route command.
490 */
get_flag_value(char * flagstr,int flags)491 static void get_flag_value(char *flagstr, int flags)
492 {
493 int i = 0;
494 char *str = flagstr;
495 static const char flagchars[] = "GHRDMDAC";
496 static const unsigned flagarray[] = {
497 RTF_GATEWAY,
498 RTF_HOST,
499 RTF_REINSTATE,
500 RTF_DYNAMIC,
501 RTF_MODIFIED,
502 RTF_DEFAULT,
503 RTF_ADDRCONF,
504 RTF_CACHE
505 };
506 *str++ = 'U';
507
508 while ( (*str = flagchars[i]) ) {
509 if (flags & flagarray[i++]) ++str;
510 }
511 }
512
513 /*
514 * extract inet4 route info from /proc/net/route file and display it.
515 */
display_routes(int is_more_info,int notresolve)516 static void display_routes(int is_more_info, int notresolve)
517 {
518 #define IPV4_MASK (RTF_GATEWAY|RTF_HOST|RTF_REINSTATE|RTF_DYNAMIC|RTF_MODIFIED)
519 unsigned long dest, gate, mask;
520 int flags, ref, use, metric, mss, win, irtt;
521 char iface[64]={0,};
522 char flag_val[10]={0,}; //there are 9 flags "UGHRDMDAC" for route.
523
524 FILE *fp = xfopen("/proc/net/route", "r");
525
526 if(!fgets(toybuf, sizeof(toybuf), fp)) return; //skip header.
527
528 xprintf("Kernel IP routing table\n"
529 "Destination Gateway Genmask Flags %s Iface\n",
530 is_more_info ? " MSS Window irtt" : "Metric Ref Use");
531
532 while (fgets(toybuf, sizeof(toybuf), fp)) {
533 int nitems = 0;
534 char *destip = NULL, *gateip = NULL, *maskip = NULL;
535
536 nitems = sscanf(toybuf, "%63s%lx%lx%X%d%d%d%lx%d%d%d\n", iface, &dest,
537 &gate, &flags, &ref, &use, &metric, &mask, &mss, &win, &irtt);
538 if (nitems != 11) {//EOF with no (nonspace) chars read.
539 if ((nitems < 0) && feof(fp)) break;
540 perror_exit("sscanf");
541 }
542
543 //skip down interfaces.
544 if (!(flags & RTF_UP)) continue;
545
546 if (dest) {//For Destination
547 if (inet_ntop(AF_INET, &dest, toybuf, sizeof(toybuf)) )
548 destip = xstrdup(toybuf);
549 } else {
550 if (!notresolve) destip = xstrdup("default");
551 else destip = xstrdup("0.0.0.0");
552 }
553
554 if (gate) {//For Gateway
555 if (inet_ntop(AF_INET, &gate, toybuf, sizeof(toybuf)) )
556 gateip = xstrdup(toybuf);
557 } else {
558 if (!notresolve) gateip = xstrdup("*");
559 else gateip = xstrdup("0.0.0.0");
560 }
561
562 //For Mask
563 if (inet_ntop(AF_INET, &mask, toybuf, sizeof(toybuf)) )
564 maskip = xstrdup(toybuf);
565
566 //Get flag Values
567 get_flag_value(flag_val, flags & IPV4_MASK);
568 if (flags & RTF_REJECT) flag_val[0] = '!';
569
570 xprintf("%-15.15s %-15.15s %-16s%-6s", destip, gateip, maskip, flag_val);
571 if (is_more_info) xprintf("%5d %-5d %6d %s\n", mss, win, irtt, iface);
572 else xprintf("%-6d %-2d %7d %s\n", metric, ref, use, iface);
573
574 if (destip) free(destip);
575 if (gateip) free(gateip);
576 if (maskip) free(maskip);
577 }//end of while.
578 fclose(fp);
579 #undef IPV4_MASK
580 }
581
582 /*
583 * netstat utility main function.
584 */
netstat_main(void)585 void netstat_main(void)
586 {
587 #define IS_NETSTAT_PROTO_FLAGS_UP (toys.optflags & (FLAG_t | FLAG_u | FLAG_w \
588 | FLAG_x))
589
590 // For no parameter, add 't', 'u', 'w', 'x' options as default
591 if (!toys.optflags) toys.optflags = FLAG_t | FLAG_u | FLAG_w | FLAG_x;
592
593 // For both 'a' and 'l' are set, remove 'l' option
594 if (toys.optflags & FLAG_a && toys.optflags & FLAG_l)
595 toys.optflags &= ~FLAG_l;
596
597 // For each 'a', 'l', 'e', 'n', 'W', 'p' options
598 // without any 't', 'u', 'w', 'x' option, add 't', 'u', 'w', 'x' options
599 if (((toys.optflags & FLAG_a) || (toys.optflags & FLAG_l) ||
600 (toys.optflags & FLAG_e) || (toys.optflags & FLAG_n) ||
601 (toys.optflags & FLAG_W) || (toys.optflags & FLAG_p)) &&
602 (!IS_NETSTAT_PROTO_FLAGS_UP) )
603 toys.optflags |= FLAG_t | FLAG_u | FLAG_w | FLAG_x;
604
605 //Display routing table.
606 if (toys.optflags & FLAG_r) {
607 display_routes(!(toys.optflags & FLAG_e), (toys.optflags & FLAG_n));
608 return;
609 }
610
611 if (toys.optflags & FLAG_p) {
612 dirtree_read("/proc", scan_pids);
613 // TODO: we probably shouldn't warn if all the processes we're going to
614 // list were identified.
615 if (TT.some_process_unidentified)
616 fprintf(stderr,
617 "(Not all processes could be identified, non-owned process info\n"
618 " will not be shown, you would have to be root to see it all.)\n");
619 }
620
621 //For TCP/UDP/RAW.
622 if ( (toys.optflags & FLAG_t) || (toys.optflags & FLAG_u) ||
623 (toys.optflags & FLAG_w) ) {
624 xprintf("Active Internet connections ");
625
626 if (toys.optflags & FLAG_a) xprintf("(servers and established)\n");
627 else if (toys.optflags & FLAG_l) xprintf("(only servers)\n");
628 else xprintf("(w/o servers)\n");
629
630 show_header();
631 if (toys.optflags & FLAG_t) {//For TCP
632 show_ipv4("/proc/net/tcp", "tcp");
633 show_ipv6("/proc/net/tcp6", "tcp");
634 }
635 if (toys.optflags & FLAG_u) {//For UDP
636 show_ipv4("/proc/net/udp", "udp");
637 show_ipv6("/proc/net/udp6", "udp");
638 }
639 if (toys.optflags & FLAG_w) {//For raw
640 show_ipv4("/proc/net/raw", "raw");
641 show_ipv6("/proc/net/raw6", "raw");
642 }
643 }
644 if (toys.optflags & FLAG_x) {//For UNIX
645 xprintf("Active UNIX domain sockets ");
646 if (toys.optflags & FLAG_a) xprintf("(servers and established)\n");
647 else if (toys.optflags & FLAG_l) xprintf("(only servers)\n");
648 else xprintf("(w/o servers)\n");
649
650 if (toys.optflags & FLAG_p)
651 xprintf("Proto RefCnt Flags Type State "
652 "I-Node PID/Program Name Path\n");
653 else
654 xprintf("Proto RefCnt Flags Type State "
655 "I-Node Path\n");
656 show_unix_sockets("/proc/net/unix", "unix");
657 }
658 if (toys.optflags & FLAG_p) clean_pid_list();
659 if (toys.exitval) toys.exitval = 0;
660 #undef IS_NETSTAT_PROTO_FLAGS_UP
661 }
662