diff options
Diffstat (limited to 'usr.bin/netstat/inet.c')
| -rw-r--r-- | usr.bin/netstat/inet.c | 494 |
1 files changed, 494 insertions, 0 deletions
diff --git a/usr.bin/netstat/inet.c b/usr.bin/netstat/inet.c new file mode 100644 index 0000000..099333e --- /dev/null +++ b/usr.bin/netstat/inet.c @@ -0,0 +1,494 @@ +/* + * Copyright (c) 1983, 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)inet.c 8.4 (Berkeley) 4/20/94"; +#endif /* not lint */ + +#include <sys/param.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/mbuf.h> +#include <sys/protosw.h> + +#include <net/route.h> +#include <netinet/in.h> +#include <netinet/in_systm.h> +#include <netinet/ip.h> +#include <netinet/in_pcb.h> +#include <netinet/ip_icmp.h> +#include <netinet/icmp_var.h> +#include <netinet/igmp_var.h> +#include <netinet/ip_var.h> +#include <netinet/tcp.h> +#include <netinet/tcpip.h> +#include <netinet/tcp_seq.h> +#define TCPSTATES +#include <netinet/tcp_fsm.h> +#include <netinet/tcp_timer.h> +#include <netinet/tcp_var.h> +#include <netinet/tcp_debug.h> +#include <netinet/udp.h> +#include <netinet/udp_var.h> + +#include <arpa/inet.h> +#include <netdb.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include "netstat.h" + +struct inpcb inpcb; +struct tcpcb tcpcb; +struct socket sockb; + +char *inetname __P((struct in_addr *)); +void inetprint __P((struct in_addr *, int, char *)); + +/* + * Print a summary of connections related to an Internet + * protocol. For TCP, also give state of connection. + * Listening processes (aflag) are suppressed unless the + * -a (all) flag is specified. + */ +void +protopr(off, name) + u_long off; + char *name; +{ + struct inpcb cb; + register struct inpcb *prev, *next; + int istcp; + static int first = 1; + + if (off == 0) + return; + istcp = strcmp(name, "tcp") == 0; + kread(off, (char *)&cb, sizeof (struct inpcb)); + inpcb = cb; + prev = (struct inpcb *)off; + if (inpcb.inp_next == (struct inpcb *)off) + return; + while (inpcb.inp_next != (struct inpcb *)off) { + next = inpcb.inp_next; + kread((u_long)next, (char *)&inpcb, sizeof (inpcb)); + if (inpcb.inp_prev != prev) { + printf("???\n"); + break; + } + if (!aflag && + inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) { + prev = next; + continue; + } + kread((u_long)inpcb.inp_socket, (char *)&sockb, sizeof (sockb)); + if (istcp) { + kread((u_long)inpcb.inp_ppcb, + (char *)&tcpcb, sizeof (tcpcb)); + } + if (first) { + printf("Active Internet connections"); + if (aflag) + printf(" (including servers)"); + putchar('\n'); + if (Aflag) + printf("%-8.8s ", "PCB"); + printf(Aflag ? + "%-5.5s %-6.6s %-6.6s %-18.18s %-18.18s %s\n" : + "%-5.5s %-6.6s %-6.6s %-22.22s %-22.22s %s\n", + "Proto", "Recv-Q", "Send-Q", + "Local Address", "Foreign Address", "(state)"); + first = 0; + } + if (Aflag) + if (istcp) + printf("%8x ", inpcb.inp_ppcb); + else + printf("%8x ", next); + printf("%-5.5s %6d %6d ", name, sockb.so_rcv.sb_cc, + sockb.so_snd.sb_cc); + inetprint(&inpcb.inp_laddr, (int)inpcb.inp_lport, name); + inetprint(&inpcb.inp_faddr, (int)inpcb.inp_fport, name); + if (istcp) { + if (tcpcb.t_state < 0 || tcpcb.t_state >= TCP_NSTATES) + printf(" %d", tcpcb.t_state); + else + printf(" %s", tcpstates[tcpcb.t_state]); + } + putchar('\n'); + prev = next; + } +} + +/* + * Dump TCP statistics structure. + */ +void +tcp_stats(off, name) + u_long off; + char *name; +{ + struct tcpstat tcpstat; + + if (off == 0) + return; + printf ("%s:\n", name); + kread(off, (char *)&tcpstat, sizeof (tcpstat)); + +#define p(f, m) if (tcpstat.f || sflag <= 1) \ + printf(m, tcpstat.f, plural(tcpstat.f)) +#define p2(f1, f2, m) if (tcpstat.f1 || tcpstat.f2 || sflag <= 1) \ + printf(m, tcpstat.f1, plural(tcpstat.f1), tcpstat.f2, plural(tcpstat.f2)) +#define p3(f, m) if (tcpstat.f || sflag <= 1) \ + printf(m, tcpstat.f, plurales(tcpstat.f)) + + p(tcps_sndtotal, "\t%d packet%s sent\n"); + p2(tcps_sndpack,tcps_sndbyte, + "\t\t%d data packet%s (%d byte%s)\n"); + p2(tcps_sndrexmitpack, tcps_sndrexmitbyte, + "\t\t%d data packet%s (%d byte%s) retransmitted\n"); + p2(tcps_sndacks, tcps_delack, + "\t\t%d ack-only packet%s (%d delayed)\n"); + p(tcps_sndurg, "\t\t%d URG only packet%s\n"); + p(tcps_sndprobe, "\t\t%d window probe packet%s\n"); + p(tcps_sndwinup, "\t\t%d window update packet%s\n"); + p(tcps_sndctrl, "\t\t%d control packet%s\n"); + p(tcps_rcvtotal, "\t%d packet%s received\n"); + p2(tcps_rcvackpack, tcps_rcvackbyte, "\t\t%d ack%s (for %d byte%s)\n"); + p(tcps_rcvdupack, "\t\t%d duplicate ack%s\n"); + p(tcps_rcvacktoomuch, "\t\t%d ack%s for unsent data\n"); + p2(tcps_rcvpack, tcps_rcvbyte, + "\t\t%d packet%s (%d byte%s) received in-sequence\n"); + p2(tcps_rcvduppack, tcps_rcvdupbyte, + "\t\t%d completely duplicate packet%s (%d byte%s)\n"); + p(tcps_pawsdrop, "\t\t%d old duplicate packet%s\n"); + p2(tcps_rcvpartduppack, tcps_rcvpartdupbyte, + "\t\t%d packet%s with some dup. data (%d byte%s duped)\n"); + p2(tcps_rcvoopack, tcps_rcvoobyte, + "\t\t%d out-of-order packet%s (%d byte%s)\n"); + p2(tcps_rcvpackafterwin, tcps_rcvbyteafterwin, + "\t\t%d packet%s (%d byte%s) of data after window\n"); + p(tcps_rcvwinprobe, "\t\t%d window probe%s\n"); + p(tcps_rcvwinupd, "\t\t%d window update packet%s\n"); + p(tcps_rcvafterclose, "\t\t%d packet%s received after close\n"); + p(tcps_rcvbadsum, "\t\t%d discarded for bad checksum%s\n"); + p(tcps_rcvbadoff, "\t\t%d discarded for bad header offset field%s\n"); + p(tcps_rcvshort, "\t\t%d discarded because packet too short\n"); + p(tcps_connattempt, "\t%d connection request%s\n"); + p(tcps_accepts, "\t%d connection accept%s\n"); + p(tcps_connects, "\t%d connection%s established (including accepts)\n"); + p2(tcps_closed, tcps_drops, + "\t%d connection%s closed (including %d drop%s)\n"); + p(tcps_conndrops, "\t%d embryonic connection%s dropped\n"); + p2(tcps_rttupdated, tcps_segstimed, + "\t%d segment%s updated rtt (of %d attempt%s)\n"); + p(tcps_rexmttimeo, "\t%d retransmit timeout%s\n"); + p(tcps_timeoutdrop, "\t\t%d connection%s dropped by rexmit timeout\n"); + p(tcps_persisttimeo, "\t%d persist timeout%s\n"); + p(tcps_keeptimeo, "\t%d keepalive timeout%s\n"); + p(tcps_keepprobe, "\t\t%d keepalive probe%s sent\n"); + p(tcps_keepdrops, "\t\t%d connection%s dropped by keepalive\n"); + p(tcps_predack, "\t%d correct ACK header prediction%s\n"); + p(tcps_preddat, "\t%d correct data packet header prediction%s\n"); + p3(tcps_pcbcachemiss, "\t%d PCB cache miss%s\n"); +#undef p +#undef p2 +#undef p3 +} + +/* + * Dump UDP statistics structure. + */ +void +udp_stats(off, name) + u_long off; + char *name; +{ + struct udpstat udpstat; + u_long delivered; + + if (off == 0) + return; + kread(off, (char *)&udpstat, sizeof (udpstat)); + printf("%s:\n", name); +#define p(f, m) if (udpstat.f || sflag <= 1) \ + printf(m, udpstat.f, plural(udpstat.f)) + p(udps_ipackets, "\t%u datagram%s received\n"); + p(udps_hdrops, "\t%u with incomplete header\n"); + p(udps_badlen, "\t%u with bad data length field\n"); + p(udps_badsum, "\t%u with bad checksum\n"); + p(udps_noport, "\t%u dropped due to no socket\n"); + p(udps_noportbcast, "\t%u broadcast/multicast datagram%s dropped due to no socket\n"); + p(udps_fullsock, "\t%u dropped due to full socket buffers\n"); + delivered = udpstat.udps_ipackets - + udpstat.udps_hdrops - + udpstat.udps_badlen - + udpstat.udps_badsum - + udpstat.udps_noport - + udpstat.udps_noportbcast - + udpstat.udps_fullsock; + if (delivered || sflag <= 1) + printf("\t%u delivered\n", delivered); + p(udps_opackets, "\t%u datagram%s output\n"); +#undef p +} + +/* + * Dump IP statistics structure. + */ +void +ip_stats(off, name) + u_long off; + char *name; +{ + struct ipstat ipstat; + + if (off == 0) + return; + kread(off, (char *)&ipstat, sizeof (ipstat)); + printf("%s:\n", name); + +#define p(f, m) if (ipstat.f || sflag <= 1) \ + printf(m, ipstat.f, plural(ipstat.f)) + + p(ips_total, "\t%u total packet%s received\n"); + p(ips_badsum, "\t%u bad header checksum%s\n"); + p(ips_toosmall, "\t%u with size smaller than minimum\n"); + p(ips_tooshort, "\t%u with data size < data length\n"); + p(ips_badhlen, "\t%u with header length < data size\n"); + p(ips_badlen, "\t%u with data length < header length\n"); + p(ips_badoptions, "\t%u with bad options\n"); + p(ips_badvers, "\t%u with incorrect version number\n"); + p(ips_fragments, "\t%u fragment%s received\n"); + p(ips_fragdropped, "\t%u fragment%s dropped (dup or out of space)\n"); + p(ips_fragtimeout, "\t%u fragment%s dropped after timeout\n"); + p(ips_reassembled, "\t%u packet%s reassembled ok\n"); + p(ips_delivered, "\t%u packet%s for this host\n"); + p(ips_noproto, "\t%u packet%s for unknown/unsupported protocol\n"); + p(ips_forward, "\t%u packet%s forwarded\n"); + p(ips_cantforward, "\t%u packet%s not forwardable\n"); + p(ips_redirectsent, "\t%u redirect%s sent\n"); + p(ips_localout, "\t%u packet%s sent from this host\n"); + p(ips_rawout, "\t%u packet%s sent with fabricated ip header\n"); + p(ips_odropped, "\t%u output packet%s dropped due to no bufs, etc.\n"); + p(ips_noroute, "\t%u output packet%s discarded due to no route\n"); + p(ips_fragmented, "\t%u output datagram%s fragmented\n"); + p(ips_ofragments, "\t%u fragment%s created\n"); + p(ips_cantfrag, "\t%u datagram%s that can't be fragmented\n"); +#undef p +} + +static char *icmpnames[] = { + "echo reply", + "#1", + "#2", + "destination unreachable", + "source quench", + "routing redirect", + "#6", + "#7", + "echo", + "#9", + "#10", + "time exceeded", + "parameter problem", + "time stamp", + "time stamp reply", + "information request", + "information request reply", + "address mask request", + "address mask reply", +}; + +/* + * Dump ICMP statistics. + */ +void +icmp_stats(off, name) + u_long off; + char *name; +{ + struct icmpstat icmpstat; + register int i, first; + + if (off == 0) + return; + kread(off, (char *)&icmpstat, sizeof (icmpstat)); + printf("%s:\n", name); + +#define p(f, m) if (icmpstat.f || sflag <= 1) \ + printf(m, icmpstat.f, plural(icmpstat.f)) + + p(icps_error, "\t%u call%s to icmp_error\n"); + p(icps_oldicmp, + "\t%u error%s not generated 'cuz old message was icmp\n"); + for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) + if (icmpstat.icps_outhist[i] != 0) { + if (first) { + printf("\tOutput histogram:\n"); + first = 0; + } + printf("\t\t%s: %u\n", icmpnames[i], + icmpstat.icps_outhist[i]); + } + p(icps_badcode, "\t%u message%s with bad code fields\n"); + p(icps_tooshort, "\t%u message%s < minimum length\n"); + p(icps_checksum, "\t%u bad checksum%s\n"); + p(icps_badlen, "\t%u message%s with bad length\n"); + for (first = 1, i = 0; i < ICMP_MAXTYPE + 1; i++) + if (icmpstat.icps_inhist[i] != 0) { + if (first) { + printf("\tInput histogram:\n"); + first = 0; + } + printf("\t\t%s: %u\n", icmpnames[i], + icmpstat.icps_inhist[i]); + } + p(icps_reflect, "\t%u message response%s generated\n"); +#undef p +} + +/* + * Dump IGMP statistics structure. + */ +void +igmp_stats(off, name) + u_long off; + char *name; +{ + struct igmpstat igmpstat; + + if (off == 0) + return; + kread(off, (char *)&igmpstat, sizeof (igmpstat)); + printf("%s:\n", name); + +#define p(f, m) if (igmpstat.f || sflag <= 1) \ + printf(m, igmpstat.f, plural(igmpstat.f)) +#define py(f, m) if (igmpstat.f || sflag <= 1) \ + printf(m, igmpstat.f, igmpstat.f != 1 ? "ies" : "y") + p(igps_rcv_total, "\t%u message%s received\n"); + p(igps_rcv_tooshort, "\t%u message%s received with too few bytes\n"); + p(igps_rcv_badsum, "\t%u message%s received with bad checksum\n"); + py(igps_rcv_queries, "\t%u membership quer%s received\n"); + py(igps_rcv_badqueries, "\t%u membership quer%s received with invalid field(s)\n"); + p(igps_rcv_reports, "\t%u membership report%s received\n"); + p(igps_rcv_badreports, "\t%u membership report%s received with invalid field(s)\n"); + p(igps_rcv_ourreports, "\t%u membership report%s received for groups to which we belong\n"); + p(igps_snd_reports, "\t%u membership report%s sent\n"); +#undef p +#undef py +} + +/* + * Pretty print an Internet address (net address + port). + * If the nflag was specified, use numbers instead of names. + */ +void +inetprint(in, port, proto) + register struct in_addr *in; + int port; + char *proto; +{ + struct servent *sp = 0; + char line[80], *cp; + int width; + + sprintf(line, "%.*s.", (Aflag && !nflag) ? 12 : 16, inetname(in)); + cp = index(line, '\0'); + if (!nflag && port) + sp = getservbyport((int)port, proto); + if (sp || port == 0) + sprintf(cp, "%.8s", sp ? sp->s_name : "*"); + else + sprintf(cp, "%d", ntohs((u_short)port)); + width = Aflag ? 18 : 22; + printf(" %-*.*s", width, width, line); +} + +/* + * Construct an Internet address representation. + * If the nflag has been supplied, give + * numeric value, otherwise try for symbolic name. + */ +char * +inetname(inp) + struct in_addr *inp; +{ + register char *cp; + static char line[50]; + struct hostent *hp; + struct netent *np; + static char domain[MAXHOSTNAMELEN + 1]; + static int first = 1; + + if (first && !nflag) { + first = 0; + if (gethostname(domain, MAXHOSTNAMELEN) == 0 && + (cp = index(domain, '.'))) + (void) strcpy(domain, cp + 1); + else + domain[0] = 0; + } + cp = 0; + if (!nflag && inp->s_addr != INADDR_ANY) { + int net = inet_netof(*inp); + int lna = inet_lnaof(*inp); + + if (lna == INADDR_ANY) { + np = getnetbyaddr(net, AF_INET); + if (np) + cp = np->n_name; + } + if (cp == 0) { + hp = gethostbyaddr((char *)inp, sizeof (*inp), AF_INET); + if (hp) { + if ((cp = index(hp->h_name, '.')) && + !strcmp(cp + 1, domain)) + *cp = 0; + cp = hp->h_name; + } + } + } + if (inp->s_addr == INADDR_ANY) + strcpy(line, "*"); + else if (cp) + strcpy(line, cp); + else { + inp->s_addr = ntohl(inp->s_addr); +#define C(x) ((x) & 0xff) + sprintf(line, "%u.%u.%u.%u", C(inp->s_addr >> 24), + C(inp->s_addr >> 16), C(inp->s_addr >> 8), C(inp->s_addr)); + } + return (line); +} |
