/* $NetBSD: netstat.c,v 1.24 2003/08/07 11:15:59 agc Exp $ */ /*- * Copyright (c) 1980, 1992, 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. 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. */ #include #ifndef lint #if 0 static char sccsid[] = "@(#)netstat.c 8.1 (Berkeley) 6/6/93"; #endif __RCSID("$NetBSD: netstat.c,v 1.24 2003/08/07 11:15:59 agc Exp $"); #endif /* not lint */ /* * netstat */ #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET6 #include #include #endif #include #include #include #define TCPSTATES #include #include #include #include #include #include #include #include #include #include "systat.h" #include "extern.h" static void fetchnetstat4(void *, int); static void enter(struct inpcb *, struct socket *, int, char *); static const char *inetname(struct in_addr); static void inetprint(struct in_addr *, int, char *); #ifdef INET6 static void fetchnetstat6(void *, int); static void enter6(struct in6pcb *, struct socket *, int, char *); static const char *inet6name(struct in6_addr *); static void inet6print(struct in6_addr *, int, char *); #endif #define streq(a,b) (strcmp(a,b)==0) struct netinfo { struct netinfo *ni_forw, *ni_prev; int ni_family; short ni_line; /* line on screen */ short ni_seen; /* 0 when not present in list */ short ni_flags; #define NIF_LACHG 0x1 /* local address changed */ #define NIF_FACHG 0x2 /* foreign address changed */ short ni_state; /* tcp state */ char *ni_proto; /* protocol */ struct in_addr ni_laddr; /* local address */ #ifdef INET6 struct in6_addr ni_laddr6; /* local address */ #endif long ni_lport; /* local port */ struct in_addr ni_faddr; /* foreign address */ #ifdef INET6 struct in6_addr ni_faddr6; /* foreign address */ #endif long ni_fport; /* foreign port */ long ni_rcvcc; /* rcv buffer character count */ long ni_sndcc; /* snd buffer character count */ }; static struct { struct netinfo *ni_forw, *ni_prev; } netcb; static int aflag = 0; int nflag = 0; static int lastrow = 1; WINDOW * opennetstat(void) { sethostent(1); setnetent(1); return (subwin(stdscr, -1, 0, 5, 0)); } void closenetstat(WINDOW *w) { struct netinfo *p; endhostent(); endnetent(); p = (struct netinfo *)netcb.ni_forw; while (p != (struct netinfo *)&netcb) { if (p->ni_line != -1) lastrow--; p->ni_line = -1; p = p->ni_forw; } if (w != NULL) { wclear(w); wrefresh(w); delwin(w); } } static struct nlist namelist[] = { #define X_TCBTABLE 0 { "_tcbtable" }, #define X_UDBTABLE 1 { "_udbtable" }, #ifdef INET6 #define X_TCB6 2 { "_tcb6" }, #define X_UDB6 3 { "_udb6" }, #endif { "" }, }; int initnetstat(void) { int n; n = kvm_nlist(kd, namelist); if (n < 0) { nlisterr(namelist); return(0); } else if (n == sizeof(namelist) / sizeof(namelist[0]) - 1) { error("No symbols in namelist"); return(0); } netcb.ni_forw = netcb.ni_prev = (struct netinfo *)&netcb; protos = TCP|UDP; return(1); } void fetchnetstat(void) { struct netinfo *p; if (namelist[X_TCBTABLE].n_value == 0) return; for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) p->ni_seen = 0; if ((protos & (TCP | UDP)) == 0) { error("No protocols to display"); return; } if ((protos & TCP) && namelist[X_TCBTABLE].n_type) fetchnetstat4(NPTR(X_TCBTABLE), 1); if ((protos & UDP) && namelist[X_UDBTABLE].n_type) fetchnetstat4(NPTR(X_UDBTABLE), 0); #ifdef INET6 if ((protos & TCP) && namelist[X_TCB6].n_type) fetchnetstat6(NPTR(X_TCB6), 1); if ((protos & UDP) && namelist[X_UDB6].n_type) fetchnetstat6(NPTR(X_UDB6), 0); #endif } static void fetchnetstat4(void *off, int istcp) { struct inpcbtable pcbtable; struct inpcb *head, *prev, *next; struct netinfo *p; struct inpcb inpcb; struct socket sockb; struct tcpcb tcpcb; KREAD(off, &pcbtable, sizeof pcbtable); prev = head = (struct inpcb *)&((struct inpcbtable *)off)->inpt_queue; next = pcbtable.inpt_queue.cqh_first; while (next != head) { KREAD(next, &inpcb, sizeof (inpcb)); if (inpcb.inp_queue.cqe_prev != prev) { printf("prev = %p, head = %p, next = %p, inpcb...prev = %p\n", prev, head, next, inpcb.inp_queue.cqe_prev); p = netcb.ni_forw; for (; p != (struct netinfo *)&netcb; p = p->ni_forw) p->ni_seen = 1; error("Kernel state in transition"); return; } prev = next; next = inpcb.inp_queue.cqe_next; if (!aflag && inet_lnaof(inpcb.inp_laddr) == INADDR_ANY) continue; if (nhosts && !checkhost(&inpcb)) continue; if (nports && !checkport(&inpcb)) continue; KREAD(inpcb.inp_socket, &sockb, sizeof (sockb)); if (istcp) { KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb)); enter(&inpcb, &sockb, tcpcb.t_state, "tcp"); } else enter(&inpcb, &sockb, 0, "udp"); } } #ifdef INET6 static void fetchnetstat6(void *off, int istcp) { struct netinfo *p; struct socket sockb; struct tcpcb tcpcb; struct in6pcb in6pcb; struct in6pcb *head6, *prev6, *next6; KREAD(off, &in6pcb, sizeof (struct in6pcb)); prev6 = head6 = (struct in6pcb *)off; next6 = in6pcb.in6p_next; while (next6 != head6) { KREAD(next6, &in6pcb, sizeof (in6pcb)); if (in6pcb.in6p_prev != prev6) { printf("prev = %p, head = %p, next = %p, in6pcb...prev = %p\n", prev6, head6, next6, in6pcb.in6p_prev); p = netcb.ni_forw; for (; p != (struct netinfo *)&netcb; p = p->ni_forw) p->ni_seen = 1; error("Kernel state in transition"); return; } prev6 = next6; next6 = in6pcb.in6p_next; if (!aflag && IN6_IS_ADDR_UNSPECIFIED(&in6pcb.in6p_laddr)) continue; if (nhosts && !checkhost6(&in6pcb)) continue; if (nports && !checkport6(&in6pcb)) continue; KREAD(in6pcb.in6p_socket, &sockb, sizeof (sockb)); if (istcp) { KREAD(in6pcb.in6p_ppcb, &tcpcb, sizeof (tcpcb)); enter6(&in6pcb, &sockb, tcpcb.t_state, "tcp"); } else enter6(&in6pcb, &sockb, 0, "udp"); } } #endif /*INET6*/ static void enter(struct inpcb *inp, struct socket *so, int state, char *proto) { struct netinfo *p; /* * Only take exact matches, any sockets with * previously unbound addresses will be deleted * below in the display routine because they * will appear as ``not seen'' in the kernel * data structures. */ for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) { if (p->ni_family != AF_INET) continue; if (!streq(proto, p->ni_proto)) continue; if (p->ni_lport != inp->inp_lport || p->ni_laddr.s_addr != inp->inp_laddr.s_addr) continue; if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr && p->ni_fport == inp->inp_fport) break; } if (p == (struct netinfo *)&netcb) { if ((p = malloc(sizeof(*p))) == NULL) { error("Out of memory"); return; } p->ni_prev = (struct netinfo *)&netcb; p->ni_forw = netcb.ni_forw; netcb.ni_forw->ni_prev = p; netcb.ni_forw = p; p->ni_line = -1; p->ni_laddr = inp->inp_laddr; p->ni_lport = inp->inp_lport; p->ni_faddr = inp->inp_faddr; p->ni_fport = inp->inp_fport; p->ni_proto = proto; p->ni_flags = NIF_LACHG | NIF_FACHG; p->ni_family = AF_INET; } p->ni_rcvcc = so->so_rcv.sb_cc; p->ni_sndcc = so->so_snd.sb_cc; p->ni_state = state; p->ni_seen = 1; } #ifdef INET6 static void enter6(struct in6pcb *in6p, struct socket *so, int state, char *proto) { struct netinfo *p; /* * Only take exact matches, any sockets with * previously unbound addresses will be deleted * below in the display routine because they * will appear as ``not seen'' in the kernel * data structures. */ for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) { if (p->ni_family != AF_INET6) continue; if (!streq(proto, p->ni_proto)) continue; if (p->ni_lport != in6p->in6p_lport || !IN6_ARE_ADDR_EQUAL(&p->ni_laddr6, &in6p->in6p_laddr)) continue; if (IN6_ARE_ADDR_EQUAL(&p->ni_faddr6, &in6p->in6p_faddr) && p->ni_fport == in6p->in6p_fport) break; } if (p == (struct netinfo *)&netcb) { if ((p = malloc(sizeof(*p))) == NULL) { error("Out of memory"); return; } p->ni_prev = (struct netinfo *)&netcb; p->ni_forw = netcb.ni_forw; netcb.ni_forw->ni_prev = p; netcb.ni_forw = p; p->ni_line = -1; p->ni_laddr6 = in6p->in6p_laddr; p->ni_lport = in6p->in6p_lport; p->ni_faddr6 = in6p->in6p_faddr; p->ni_fport = in6p->in6p_fport; p->ni_proto = proto; p->ni_flags = NIF_LACHG | NIF_FACHG; p->ni_family = AF_INET6; } p->ni_rcvcc = so->so_rcv.sb_cc; p->ni_sndcc = so->so_snd.sb_cc; p->ni_state = state; p->ni_seen = 1; } #endif /* column locations */ #define LADDR 0 #define FADDR LADDR+23 #define PROTO FADDR+23 #define RCVCC PROTO+6 #define SNDCC RCVCC+7 #define STATE SNDCC+7 void labelnetstat(void) { struct netinfo *p; if (namelist[X_TCBTABLE].n_type == 0) return; wmove(wnd, 0, 0); wclrtobot(wnd); mvwaddstr(wnd, 0, LADDR, "Local Address"); mvwaddstr(wnd, 0, FADDR, "Foreign Address"); mvwaddstr(wnd, 0, PROTO, "Proto"); mvwaddstr(wnd, 0, RCVCC, "Recv-Q"); mvwaddstr(wnd, 0, SNDCC, "Send-Q"); mvwaddstr(wnd, 0, STATE, "(state)"); p = netcb.ni_forw; for (; p != (struct netinfo *)&netcb; p = p->ni_forw) { if (p->ni_line == -1) continue; p->ni_flags |= NIF_LACHG | NIF_FACHG; } } void shownetstat(void) { struct netinfo *p, *q; /* * First, delete any connections that have gone * away and adjust the position of connections * below to reflect the deleted line. */ p = netcb.ni_forw; while (p != (struct netinfo *)&netcb) { if (p->ni_line == -1 || p->ni_seen) { p = p->ni_forw; continue; } wmove(wnd, p->ni_line, 0); wdeleteln(wnd); q = netcb.ni_forw; for (; q != (struct netinfo *)&netcb; q = q->ni_forw) if (q != p && q->ni_line > p->ni_line) { q->ni_line--; /* this shouldn't be necessary */ q->ni_flags |= NIF_LACHG | NIF_FACHG; } lastrow--; q = p->ni_forw; p->ni_prev->ni_forw = p->ni_forw; p->ni_forw->ni_prev = p->ni_prev; free(p); p = q; } /* * Update existing connections and add new ones. */ for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) { if (p->ni_line == -1) { /* * Add a new entry if possible. */ if (lastrow > getmaxy(wnd)) continue; p->ni_line = lastrow++; p->ni_flags |= NIF_LACHG | NIF_FACHG; } if (p->ni_flags & NIF_LACHG) { wmove(wnd, p->ni_line, LADDR); switch (p->ni_family) { case AF_INET: inetprint(&p->ni_laddr, p->ni_lport, p->ni_proto); break; #ifdef INET6 case AF_INET6: inet6print(&p->ni_laddr6, p->ni_lport, p->ni_proto); break; #endif } p->ni_flags &= ~NIF_LACHG; } if (p->ni_flags & NIF_FACHG) { wmove(wnd, p->ni_line, FADDR); switch (p->ni_family) { case AF_INET: inetprint(&p->ni_faddr, p->ni_fport, p->ni_proto); break; #ifdef INET6 case AF_INET6: inet6print(&p->ni_faddr6, p->ni_fport, p->ni_proto); break; #endif } p->ni_flags &= ~NIF_FACHG; } mvwaddstr(wnd, p->ni_line, PROTO, p->ni_proto); #ifdef INET6 if (p->ni_family == AF_INET6) waddstr(wnd, "6"); #endif mvwprintw(wnd, p->ni_line, RCVCC, "%6ld", p->ni_rcvcc); mvwprintw(wnd, p->ni_line, SNDCC, "%6ld", p->ni_sndcc); if (streq(p->ni_proto, "tcp")) { if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES) mvwprintw(wnd, p->ni_line, STATE, "%d", p->ni_state); else mvwaddstr(wnd, p->ni_line, STATE, tcpstates[p->ni_state]); } wclrtoeol(wnd); } if (lastrow < getmaxy(wnd)) { wmove(wnd, lastrow, 0); wclrtobot(wnd); wmove(wnd, getmaxy(wnd), 0); wdeleteln(wnd); /* XXX */ } } /* * Pretty print an Internet address (net address + port). * If the nflag was specified, use numbers instead of names. */ static void inetprint(struct in_addr *in, int port, char *proto) { struct servent *sp = 0; char line[80], *cp; (void)snprintf(line, sizeof line, "%.*s.", 16, inetname(*in)); cp = strchr(line, '\0'); if (!nflag && port) sp = getservbyport(port, proto); if (sp || port == 0) (void)snprintf(cp, line + sizeof line - cp, "%.8s", sp ? sp->s_name : "*"); else (void)snprintf(cp, line + sizeof line - cp, "%d", ntohs((u_short)port)); /* pad to full column to clear any garbage */ cp = strchr(line, '\0'); while (cp - line < 22) *cp++ = ' '; *cp = '\0'; waddstr(wnd, line); } #ifdef INET6 static void inet6print(struct in6_addr *in6, int port, char *proto) { struct servent *sp = 0; char line[80], *cp; (void)snprintf(line, sizeof line, "%.*s.", 16, inet6name(in6)); cp = strchr(line, '\0'); if (!nflag && port) sp = getservbyport(port, proto); if (sp || port == 0) (void)snprintf(cp, line + sizeof line - cp, "%.8s", sp ? sp->s_name : "*"); else (void)snprintf(cp, line + sizeof line - cp, "%d", ntohs((u_short)port)); /* pad to full column to clear any garbage */ cp = strchr(line, '\0'); while (cp - line < 22) *cp++ = ' '; *cp = '\0'; waddstr(wnd, line); } #endif /* * Construct an Internet address representation. * If the nflag has been supplied, give * numeric value, otherwise try for symbolic name. */ static const char * inetname(struct in_addr in) { char *cp = 0; static char line[50]; struct hostent *hp; struct netent *np; if (!nflag && in.s_addr != INADDR_ANY) { int net = inet_netof(in); int lna = inet_lnaof(in); if (lna == INADDR_ANY) { np = getnetbyaddr(net, AF_INET); if (np) cp = np->n_name; } if (cp == 0) { hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET); if (hp) cp = hp->h_name; } } if (in.s_addr == INADDR_ANY) strlcpy(line, "*", sizeof(line)); else if (cp) strlcpy(line, cp, sizeof(line)); else { in.s_addr = ntohl(in.s_addr); #define C(x) ((x) & 0xff) (void)snprintf(line, sizeof line, "%u.%u.%u.%u", C(in.s_addr >> 24), C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr)); #undef C } return (line); } #ifdef INET6 static const char * inet6name(struct in6_addr *in6) { static char line[NI_MAXHOST]; struct sockaddr_in6 sin6; int flags; if (nflag) flags = NI_NUMERICHOST; else flags = 0; if (IN6_IS_ADDR_UNSPECIFIED(in6)) return "*"; memset(&sin6, 0, sizeof(sin6)); sin6.sin6_family = AF_INET6; sin6.sin6_len = sizeof(struct sockaddr_in6); sin6.sin6_addr = *in6; if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len, line, sizeof(line), NULL, 0, flags) == 0) return line; return "?"; } #endif /* please note: there are also some netstat commands in netcmds.c */ void netstat_all(char *args) { aflag = !aflag; fetchnetstat(); shownetstat(); refresh(); } void netstat_names(char *args) { if (nflag == 0) return; nflag = 0; wclear(wnd); labelnetstat(); shownetstat(); refresh(); } void netstat_numbers(char *args) { if (nflag != 0) return; nflag = 1; wclear(wnd); labelnetstat(); shownetstat(); refresh(); }