xref: /original-bsd/usr.bin/netstat/inet.c (revision 57feb3a1) 
1 #ifndef lint
2 static char sccsid[] = "@(#)inet.c	4.14 (Berkeley) 83/09/21";
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("%-5.5s %-6.6s %-6.6s  %-18.18s %-18.18s %s\n",
75 			"Proto", "Recv-Q", "Send-Q",
76 			"Local Address", "Foreign Address", "(state)");
77 		first = 0;
78 	}
79 	while (inpcb.inp_next != (struct inpcb *)off) {
80 		char *cp;
81 
82 		next = inpcb.inp_next;
83 		klseek(kmem, (off_t)next, 0);
84 		read(kmem, &inpcb, sizeof (inpcb));
85 		if (inpcb.inp_prev != prev) {
86 			printf("???\n");
87 			break;
88 		}
89 		if (!aflag &&
90 		  inet_lnaof(inpcb.inp_laddr.s_addr) == INADDR_ANY) {
91 			prev = next;
92 			continue;
93 		}
94 		klseek(kmem, (off_t)inpcb.inp_socket, 0);
95 		read(kmem, &socket, sizeof (socket));
96 		if (istcp) {
97 			klseek(kmem, (off_t)inpcb.inp_ppcb, 0);
98 			read(kmem, &tcpcb, sizeof (tcpcb));
99 		}
100 		if (Aflag)
101 			printf("%8x ", inpcb.inp_ppcb);
102 		printf("%-5.5s %6d %6d ", name, socket.so_rcv.sb_cc,
103 			socket.so_snd.sb_cc);
104 		inetprint(&inpcb.inp_laddr, inpcb.inp_lport, name);
105 		inetprint(&inpcb.inp_faddr, inpcb.inp_fport, name);
106 		if (istcp) {
107 			if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES)
108 				printf(" %d", tcpcb.t_state);
109 			else
110 				printf(" %s", tcpstates[tcpcb.t_state]);
111 		}
112 		putchar('\n');
113 		prev = next;
114 	}
115 }
116 
117 /*
118  * Dump TCP statistics structure.
119  */
120 tcp_stats(off, name)
121 	off_t off;
122 	char *name;
123 {
124 	struct tcpstat tcpstat;
125 
126 	if (off == 0) {
127 		printf("%sstat: symbol not in namelist\n", name);
128 		return;
129 	}
130 	klseek(kmem, off, 0);
131 	read(kmem, (char *)&tcpstat, sizeof (tcpstat));
132 	printf("%s:\n\t%d bad header checksum%s\n", name,
133 		tcpstat.tcps_badsum, plural(tcpstat.tcps_badsum));
134 	printf("\t%d bad header offset field%s\n",
135 		tcpstat.tcps_badoff, plural(tcpstat.tcps_badoff));
136 	printf("\t%d incomplete header%s\n",
137 		tcpstat.tcps_hdrops, plural(tcpstat.tcps_hdrops));
138 #ifdef notdef
139 	printf("\t%d bad segment%s\n",
140 		tcpstat.tcps_badsegs, plural(tcpstat.badsegs));
141 	printf("\t%d unacknowledged packet%s\n",
142 		tcpstat.tcps_unack, plural(tcpstat.tcps_unack));
143 #endif
144 }
145 
146 /*
147  * Dump UDP statistics structure.
148  */
149 udp_stats(off, name)
150 	off_t off;
151 	char *name;
152 {
153 	struct udpstat udpstat;
154 
155 	if (off == 0) {
156 		printf("%sstat: symbol not in namelist\n", name);
157 		return;
158 	}
159 	klseek(kmem, off, 0);
160 	read(kmem, (char *)&udpstat, sizeof (udpstat));
161 	printf("%s:\n\t%d bad header checksum%s\n", name,
162 		udpstat.udps_badsum, plural(udpstat.udps_badsum));
163 	printf("\t%d incomplete header%s\n",
164 		udpstat.udps_hdrops, plural(udpstat.udps_hdrops));
165 	printf("\t%d bad data length field%s\n",
166 		udpstat.udps_badlen, plural(udpstat.udps_badlen));
167 }
168 
169 /*
170  * Dump IP statistics structure.
171  */
172 ip_stats(off, name)
173 	off_t off;
174 	char *name;
175 {
176 	struct ipstat ipstat;
177 
178 	if (off == 0) {
179 		printf("%sstat: symbol not in namelist\n", name);
180 		return;
181 	}
182 	klseek(kmem, off, 0);
183 	read(kmem, (char *)&ipstat, sizeof (ipstat));
184 	printf("%s:\n\t%d bad header checksum%s\n", name,
185 		ipstat.ips_badsum, plural(ipstat.ips_badsum));
186 	printf("\t%d with size smaller than minimum\n", ipstat.ips_tooshort);
187 	printf("\t%d with data size < data length\n", ipstat.ips_toosmall);
188 	printf("\t%d with header length < data size\n", ipstat.ips_badhlen);
189 	printf("\t%d with data length < header length\n", ipstat.ips_badlen);
190 }
191 
192 static	char *icmpnames[] = {
193 	"echo reply",
194 	"#1",
195 	"#2",
196 	"destination unreachable",
197 	"source quench",
198 	"routing redirect",
199 	"#6",
200 	"#7",
201 	"echo",
202 	"#9",
203 	"#10",
204 	"time exceeded",
205 	"parameter problem",
206 	"time stamp",
207 	"time stamp reply",
208 	"information request",
209 	"information request reply"
210 };
211 
212 /*
213  * Dump ICMP statistics.
214  */
215 icmp_stats(off, name)
216 	off_t off;
217 	char *name;
218 {
219 	struct icmpstat icmpstat;
220 	register int i, first;
221 
222 	if (off == 0) {
223 		printf("%sstat: symbol not in namelist\n", name);
224 		return;
225 	}
226 	klseek(kmem, off, 0);
227 	read(kmem, (char *)&icmpstat, sizeof (icmpstat));
228 	printf("%s:\n\t%d call%s to icmp_error\n", name,
229 		icmpstat.icps_error, plural(icmpstat.icps_error));
230 	printf("\t%d error%s not generated 'cuz old message too short\n",
231 		icmpstat.icps_oldshort, plural(icmpstat.icps_oldshort));
232 	printf("\t%d error%s not generated 'cuz old message was icmp\n",
233 		icmpstat.icps_oldicmp, plural(icmpstat.icps_oldicmp));
234 	for (first = 1, i = 0; i < ICMP_IREQREPLY + 1; i++)
235 		if (icmpstat.icps_outhist[i] != 0) {
236 			if (first) {
237 				printf("\tOutput histogram:\n");
238 				first = 0;
239 			}
240 			printf("\t\t%s: %d\n", icmpnames[i],
241 				icmpstat.icps_outhist[i]);
242 		}
243 	printf("\t%d message%s with bad code fields\n",
244 		icmpstat.icps_badcode, plural(icmpstat.icps_badcode));
245 	printf("\t%d message%s < minimum length\n",
246 		icmpstat.icps_tooshort, plural(icmpstat.icps_tooshort));
247 	printf("\t%d bad checksum%s\n",
248 		icmpstat.icps_checksum, plural(icmpstat.icps_checksum));
249 	printf("\t%d message%s with bad length\n",
250 		icmpstat.icps_badlen, plural(icmpstat.icps_badlen));
251 	printf("\t%d message response%s generated\n",
252 		icmpstat.icps_reflect, plural(icmpstat.icps_reflect));
253 	for (first = 1, i = 0; i < ICMP_IREQREPLY + 1; i++)
254 		if (icmpstat.icps_inhist[i] != 0) {
255 			if (first) {
256 				printf("\tInput histogram:\n");
257 				first = 0;
258 			}
259 			printf("\t\t%s: %d\n", icmpnames[i],
260 				icmpstat.icps_inhist[i]);
261 		}
262 }
263 
264 /*
265  * Pretty print an Internet address (net address + port).
266  * If the nflag was specified, use numbers instead of names.
267  */
268 inetprint(in, port, proto)
269 	register struct in_addr *in;
270 	int port;
271 	char *proto;
272 {
273 	struct servent *sp = 0;
274 	char line[80], *cp, *index();
275 
276 	sprintf(line, "%.10s.", inetname(*in));
277 	cp = index(line, '\0');
278 	if (!nflag && port)
279 		sp = getservbyport(port, proto);
280 	if (sp || port == 0)
281 		sprintf(cp, "%.8s", sp ? sp->s_name : "*");
282 	else
283 		sprintf(cp, "%d", ntohs((u_short)port));
284 	printf(" %-18.18s", line);
285 }
286 
287 /*
288  * Construct an Internet address representation.
289  * If the nflag has been supplied, give
290  * numeric value, otherwise try for symbolic name.
291  */
292 char *
293 inetname(in)
294 	struct in_addr in;
295 {
296 	char *cp = 0;
297 	static char line[50];
298 
299 	if (!nflag) {
300 		if (inet_lnaof(in) == INADDR_ANY) {
301 			struct netent *np;
302 
303 			np = getnetbyaddr(inet_netof(in), AF_INET);
304 			if (np)
305 				cp = np->n_name;
306 		} else {
307 			struct hostent *hp;
308 
309 			hp = gethostbyaddr(&in, sizeof (struct in_addr),
310 				AF_INET);
311 			if (hp)
312 				cp = hp->h_name;
313 		}
314 	}
315 	if (in.s_addr == INADDR_ANY)
316 		strcpy(line, "*");
317 	else if (cp)
318 		strcpy(line, cp);
319 	else {
320 		u_char *ucp = (u_char *)&in;
321 		sprintf(line, "%u.%u.%u.%u", ucp[0], ucp[1], ucp[2], ucp[3]);
322 	}
323 	return (line);
324 }
325