xref: /original-bsd/usr.bin/netstat/inet.c (revision 7e7b101a) 
1 #ifndef lint
2 static char sccsid[] = "@(#)inet.c	4.18 (Berkeley) 84/10/31";
3 #endif
4 
5 #include <sys/types.h>
6 #include <sys/socket.h>
7 #include <sys/socketvar.h>
8 #include <sys/mbuf.h>
9 #include <sys/protosw.h>
10 
11 #include <net/route.h>
12 #include <netinet/in.h>
13 #include <netinet/in_systm.h>
14 #include <netinet/in_pcb.h>
15 #include <netinet/ip.h>
16 #include <netinet/ip_icmp.h>
17 #include <netinet/icmp_var.h>
18 #include <netinet/ip_var.h>
19 #include <netinet/tcp.h>
20 #include <netinet/tcpip.h>
21 #include <netinet/tcp_seq.h>
22 #define TCPSTATES
23 #include <netinet/tcp_fsm.h>
24 #include <netinet/tcp_timer.h>
25 #include <netinet/tcp_var.h>
26 #include <netinet/tcp_debug.h>
27 #include <netinet/udp.h>
28 #include <netinet/udp_var.h>
29 
30 #include <netdb.h>
31 
32 struct	inpcb inpcb;
33 struct	tcpcb tcpcb;
34 struct	socket socket;
35 struct	protosw proto;
36 extern	int kmem;
37 extern	int Aflag;
38 extern	int aflag;
39 extern	int nflag;
40 
41 static	int first = 1;
42 char	*inetname();
43 
44 /*
45  * Print a summary of connections related to an Internet
46  * protocol.  For TCP, also give state of connection.
47  * Listening processes (aflag) are suppressed unless the
48  * -a (all) flag is specified.
49  */
50 protopr(off, name)
51 	off_t off;
52 	char *name;
53 {
54 	struct inpcb cb;
55 	register struct inpcb *prev, *next;
56 	int istcp;
57 
58 	if (off == 0) {
59 		printf("%s control block: symbol not in namelist\n", name);
60 		return;
61 	}
62 	istcp = strcmp(name, "tcp") == 0;
63 	klseek(kmem, off, 0);
64 	read(kmem, &cb, sizeof (struct inpcb));
65 	inpcb = cb;
66 	prev = (struct inpcb *)off;
67 	if (first) {
68 		printf("Active connections");
69 		if (aflag)
70 			printf(" (including servers)");
71 		putchar('\n');
72 		if (Aflag)
73 			printf("%-8.8s ", "PCB");
74 		printf(Aflag ? "%-5.5s %-6.6s %-6.6s  %-18.18s %-18.18s %s\n" :
75 			"%-5.5s %-6.6s %-6.6s  %-22.22s %-22.22s %s\n",
76 			"Proto", "Recv-Q", "Send-Q",
77 			"Local Address", "Foreign Address", "(state)");
78 		first = 0;
79 	}
80 	while (inpcb.inp_next != (struct inpcb *)off) {
81 		char *cp;
82 
83 		next = inpcb.inp_next;
84 		klseek(kmem, (off_t)next, 0);
85 		read(kmem, &inpcb, sizeof (inpcb));
86 		if (inpcb.inp_prev != prev) {
87 			printf("???\n");
88 			break;
89 		}
90 		if (!aflag &&
91 		  inet_lnaof(inpcb.inp_laddr.s_addr) == INADDR_ANY) {
92 			prev = next;
93 			continue;
94 		}
95 		klseek(kmem, (off_t)inpcb.inp_socket, 0);
96 		read(kmem, &socket, sizeof (socket));
97 		if (istcp) {
98 			klseek(kmem, (off_t)inpcb.inp_ppcb, 0);
99 			read(kmem, &tcpcb, sizeof (tcpcb));
100 		}
101 		if (Aflag)
102 			printf("%8x ", inpcb.inp_ppcb);
103 		printf("%-5.5s %6d %6d ", name, socket.so_rcv.sb_cc,
104 			socket.so_snd.sb_cc);
105 		inetprint(&inpcb.inp_laddr, inpcb.inp_lport, name);
106 		inetprint(&inpcb.inp_faddr, inpcb.inp_fport, name);
107 		if (istcp) {
108 			if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES)
109 				printf(" %d", tcpcb.t_state);
110 			else
111 				printf(" %s", tcpstates[tcpcb.t_state]);
112 		}
113 		putchar('\n');
114 		prev = next;
115 	}
116 }
117 
118 /*
119  * Dump TCP statistics structure.
120  */
121 tcp_stats(off, name)
122 	off_t off;
123 	char *name;
124 {
125 	struct tcpstat tcpstat;
126 
127 	if (off == 0) {
128 		printf("%sstat: symbol not in namelist\n", name);
129 		return;
130 	}
131 	klseek(kmem, off, 0);
132 	read(kmem, (char *)&tcpstat, sizeof (tcpstat));
133 	printf("%s:\n\t%d bad header checksum%s\n", name,
134 		tcpstat.tcps_badsum, plural(tcpstat.tcps_badsum));
135 	printf("\t%d bad header offset field%s\n",
136 		tcpstat.tcps_badoff, plural(tcpstat.tcps_badoff));
137 	printf("\t%d incomplete header%s\n",
138 		tcpstat.tcps_hdrops, plural(tcpstat.tcps_hdrops));
139 #ifdef notdef
140 	printf("\t%d bad segment%s\n",
141 		tcpstat.tcps_badsegs, plural(tcpstat.badsegs));
142 	printf("\t%d unacknowledged packet%s\n",
143 		tcpstat.tcps_unack, plural(tcpstat.tcps_unack));
144 #endif
145 }
146 
147 /*
148  * Dump UDP statistics structure.
149  */
150 udp_stats(off, name)
151 	off_t off;
152 	char *name;
153 {
154 	struct udpstat udpstat;
155 
156 	if (off == 0) {
157 		printf("%sstat: symbol not in namelist\n", name);
158 		return;
159 	}
160 	klseek(kmem, off, 0);
161 	read(kmem, (char *)&udpstat, sizeof (udpstat));
162 	printf("%s:\n\t%d bad header checksum%s\n", name,
163 		udpstat.udps_badsum, plural(udpstat.udps_badsum));
164 	printf("\t%d incomplete header%s\n",
165 		udpstat.udps_hdrops, plural(udpstat.udps_hdrops));
166 	printf("\t%d bad data length field%s\n",
167 		udpstat.udps_badlen, plural(udpstat.udps_badlen));
168 }
169 
170 /*
171  * Dump IP statistics structure.
172  */
173 ip_stats(off, name)
174 	off_t off;
175 	char *name;
176 {
177 	struct ipstat ipstat;
178 
179 	if (off == 0) {
180 		printf("%sstat: symbol not in namelist\n", name);
181 		return;
182 	}
183 	klseek(kmem, off, 0);
184 	read(kmem, (char *)&ipstat, sizeof (ipstat));
185 	printf("%s:\n\t%d bad header checksum%s\n", name,
186 		ipstat.ips_badsum, plural(ipstat.ips_badsum));
187 	printf("\t%d with size smaller than minimum\n", ipstat.ips_tooshort);
188 	printf("\t%d with data size < data length\n", ipstat.ips_toosmall);
189 	printf("\t%d with header length < data size\n", ipstat.ips_badhlen);
190 	printf("\t%d with data length < header length\n", ipstat.ips_badlen);
191 }
192 
193 static	char *icmpnames[] = {
194 	"echo reply",
195 	"#1",
196 	"#2",
197 	"destination unreachable",
198 	"source quench",
199 	"routing redirect",
200 	"#6",
201 	"#7",
202 	"echo",
203 	"#9",
204 	"#10",
205 	"time exceeded",
206 	"parameter problem",
207 	"time stamp",
208 	"time stamp reply",
209 	"information request",
210 	"information request reply"
211 };
212 
213 /*
214  * Dump ICMP statistics.
215  */
216 icmp_stats(off, name)
217 	off_t off;
218 	char *name;
219 {
220 	struct icmpstat icmpstat;
221 	register int i, first;
222 
223 	if (off == 0) {
224 		printf("%sstat: symbol not in namelist\n", name);
225 		return;
226 	}
227 	klseek(kmem, off, 0);
228 	read(kmem, (char *)&icmpstat, sizeof (icmpstat));
229 	printf("%s:\n\t%d call%s to icmp_error\n", name,
230 		icmpstat.icps_error, plural(icmpstat.icps_error));
231 	printf("\t%d error%s not generated 'cuz old message too short\n",
232 		icmpstat.icps_oldshort, plural(icmpstat.icps_oldshort));
233 	printf("\t%d error%s not generated 'cuz old message was icmp\n",
234 		icmpstat.icps_oldicmp, plural(icmpstat.icps_oldicmp));
235 	for (first = 1, i = 0; i < ICMP_IREQREPLY + 1; i++)
236 		if (icmpstat.icps_outhist[i] != 0) {
237 			if (first) {
238 				printf("\tOutput histogram:\n");
239 				first = 0;
240 			}
241 			printf("\t\t%s: %d\n", icmpnames[i],
242 				icmpstat.icps_outhist[i]);
243 		}
244 	printf("\t%d message%s with bad code fields\n",
245 		icmpstat.icps_badcode, plural(icmpstat.icps_badcode));
246 	printf("\t%d message%s < minimum length\n",
247 		icmpstat.icps_tooshort, plural(icmpstat.icps_tooshort));
248 	printf("\t%d bad checksum%s\n",
249 		icmpstat.icps_checksum, plural(icmpstat.icps_checksum));
250 	printf("\t%d message%s with bad length\n",
251 		icmpstat.icps_badlen, plural(icmpstat.icps_badlen));
252 	printf("\t%d message response%s generated\n",
253 		icmpstat.icps_reflect, plural(icmpstat.icps_reflect));
254 	for (first = 1, i = 0; i < ICMP_IREQREPLY + 1; i++)
255 		if (icmpstat.icps_inhist[i] != 0) {
256 			if (first) {
257 				printf("\tInput histogram:\n");
258 				first = 0;
259 			}
260 			printf("\t\t%s: %d\n", icmpnames[i],
261 				icmpstat.icps_inhist[i]);
262 		}
263 }
264 
265 /*
266  * Pretty print an Internet address (net address + port).
267  * If the nflag was specified, use numbers instead of names.
268  */
269 inetprint(in, port, proto)
270 	register struct in_addr *in;
271 	int port;
272 	char *proto;
273 {
274 	struct servent *sp = 0;
275 	char line[80], *cp, *index();
276 	int width;
277 
278 	sprintf(line, "%.*s.", Aflag ? 10 : 16, inetname(*in));
279 	cp = index(line, '\0');
280 	if (!nflag && port)
281 		sp = getservbyport(port, proto);
282 	if (sp || port == 0)
283 		sprintf(cp, "%.8s", sp ? sp->s_name : "*");
284 	else
285 		sprintf(cp, "%d", ntohs((u_short)port));
286 	width = Aflag ? 18 : 22;
287 	printf(" %-*.*s", width, width, line);
288 }
289 
290 /*
291  * Construct an Internet address representation.
292  * If the nflag has been supplied, give
293  * numeric value, otherwise try for symbolic name.
294  */
295 char *
296 inetname(in)
297 	struct in_addr in;
298 {
299 	char *cp = 0;
300 	static char line[50];
301 	struct hostent *hp;
302 	struct netent *np;
303 
304 	if (!nflag && in.s_addr != INADDR_ANY) {
305 		int net = inet_netof(in), subnet = inet_subnetof(in);
306 		int lna = inet_lnaof(in);
307 
308 		if (lna == INADDR_ANY) {
309 			np = getnetbyaddr(net, AF_INET);
310 			if (np)
311 				cp = np->n_name;
312 		} else if (subnet != net && (lna & 0xff) == 0 &&
313 		    (np = getnetbyaddr(subnet, AF_INET))) {
314 			struct in_addr subnaddr, inet_makeaddr();
315 
316 			subnaddr = inet_makeaddr(subnet, INADDR_ANY);
317 			if (bcmp(&in, &subnaddr, sizeof (in)) == 0)
318 				cp = np->n_name;
319 			else
320 				goto host;
321 		} else {
322 host:
323 			hp = gethostbyaddr(&in, sizeof (in), AF_INET);
324 			if (hp)
325 				cp = hp->h_name;
326 		}
327 	}
328 	if (in.s_addr == INADDR_ANY)
329 		strcpy(line, "*");
330 	else if (cp)
331 		strcpy(line, cp);
332 	else {
333 		u_char *ucp = (u_char *)&in;
334 
335 		sprintf(line, "%u.%u.%u.%u", ucp[0], ucp[1], ucp[2], ucp[3]);
336 	}
337 	return (line);
338 }
339