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/* $OpenBSD: netstat.c,v 1.45 2015/03/12 01:03:00 claudio Exp $ */ |
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/* $NetBSD: netstat.c,v 1.3 1995/06/18 23:53:07 cgd Exp $ */ |
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/*- |
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* Copyright (c) 1980, 1992, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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/* |
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* netstat |
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*/ |
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#include <kvm.h> |
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#include <sys/types.h> |
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#include <sys/sysctl.h> |
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#include <sys/socket.h> |
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#define _KERNEL |
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#include <sys/file.h> |
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#undef _KERNEL |
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#include <netinet/in.h> |
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#include <netinet/tcp.h> |
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#include <netinet/tcp_seq.h> |
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#define TCPSTATES |
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#include <netinet/tcp_fsm.h> |
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#include <arpa/inet.h> |
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#include <netdb.h> |
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#include <signal.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <err.h> |
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#include <nlist.h> |
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#include <paths.h> |
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#include "systat.h" |
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#include "engine.h" |
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#define TCP 0x1 |
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#define UDP 0x2 |
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#define OTHER 0x4 |
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struct netinfo { |
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union { |
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struct in_addr nif_laddr; /* local address */ |
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struct in6_addr nif_laddr6; /* local address */ |
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} l; |
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union { |
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struct in_addr nif_faddr; /* foreign address */ |
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struct in6_addr nif_faddr6; /* foreign address */ |
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} f; |
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long nif_rcvcc; /* rcv buffer character count */ |
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long nif_sndcc; /* snd buffer character count */ |
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short nif_lport; /* local port */ |
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short nif_fport; /* foreign port */ |
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short nif_state; /* tcp state */ |
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short nif_family; |
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short nif_proto; /* protocol */ |
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short nif_ipproto; |
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}; |
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#define nif_laddr l.nif_laddr |
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#define nif_laddr6 l.nif_laddr6 |
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#define nif_faddr f.nif_faddr |
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#define nif_faddr6 f.nif_faddr6 |
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static void enter(struct kinfo_file *); |
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static int kf_comp(const void *, const void *); |
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static void inetprint(struct in_addr *, int, char *, field_def *); |
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static void inet6print(struct in6_addr *, int, char *, field_def *); |
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static void shownetstat(struct netinfo *p); |
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void print_ns(void); |
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int read_ns(void); |
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int select_ns(void); |
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int ns_keyboard_callback(int); |
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#define streq(a,b) (strcmp(a,b)==0) |
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static int aflag = 0; |
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#define ADD_ALLOC 1000 |
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int protos; |
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struct netinfo *netinfos = NULL; |
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size_t num_ns = 0; |
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static size_t num_alloc = 0; |
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field_def fields_ns[] = { |
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{"LOCAL ADDRESS", 20, 45, 1, FLD_ALIGN_LEFT, -1, 0, 0, 0}, |
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{"FOREIGN ADDRESS", 20, 45, 1, FLD_ALIGN_LEFT, -1, 0, 0, 0}, |
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{"PROTO", 4, 9, 1, FLD_ALIGN_LEFT, -1, 0, 0, 0}, |
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{"RECV-Q", 5, 8, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0}, |
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{"SEND-Q", 5, 8, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0}, |
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{"STATE", 5, 11, 6, FLD_ALIGN_LEFT, -1, 0, 0, 0}, |
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}; |
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#define FLD_NS_LOCAL FIELD_ADDR(fields_ns,0) |
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#define FLD_NS_FOREIGN FIELD_ADDR(fields_ns,1) |
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#define FLD_NS_PROTO FIELD_ADDR(fields_ns,2) |
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#define FLD_NS_RECV_Q FIELD_ADDR(fields_ns,3) |
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#define FLD_NS_SEND_Q FIELD_ADDR(fields_ns,4) |
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#define FLD_NS_STATE FIELD_ADDR(fields_ns,5) |
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/* Define views */ |
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field_def *view_ns_0[] = { |
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FLD_NS_LOCAL, FLD_NS_FOREIGN, FLD_NS_PROTO, |
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FLD_NS_RECV_Q, FLD_NS_SEND_Q, FLD_NS_STATE, NULL |
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}; |
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/* Define view managers */ |
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struct view_manager netstat_mgr = { |
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"Netstat", select_ns, read_ns, NULL, print_header, |
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print_ns, ns_keyboard_callback, NULL, NULL |
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}; |
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field_view views_ns[] = { |
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{view_ns_0, "netstat", '0', &netstat_mgr}, |
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{NULL, NULL, 0, NULL} |
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}; |
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struct netinfo * |
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next_ns(void) |
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{ |
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if (num_alloc <= num_ns) { |
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struct netinfo *ni; |
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size_t a = num_alloc + ADD_ALLOC; |
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if (a < num_alloc) |
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return NULL; |
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ni = reallocarray(netinfos, a, sizeof(*ni)); |
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if (ni == NULL) |
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return NULL; |
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netinfos = ni; |
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num_alloc = a; |
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} |
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return &netinfos[num_ns++]; |
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} |
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static void |
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enter(struct kinfo_file *kf) |
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{ |
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#define s6_addr32 __u6_addr.__u6_addr32 |
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struct netinfo *p; |
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/* first filter out unwanted sockets */ |
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if (kf->so_family != AF_INET && kf->so_family != AF_INET6) |
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return; |
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switch (kf->so_protocol) { |
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case IPPROTO_TCP: |
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if ((protos & TCP) == 0) |
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return; |
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break; |
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case IPPROTO_UDP: |
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if ((protos & UDP) == 0) |
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return; |
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break; |
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default: |
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if ((protos & OTHER) == 0) |
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return; |
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break; |
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} |
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if (!aflag) { |
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struct in6_addr faddr6; |
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switch (kf->so_family) { |
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case AF_INET: |
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if (kf->inp_faddru[0] == INADDR_ANY) |
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return; |
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break; |
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case AF_INET6: |
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faddr6.s6_addr32[0] = kf->inp_faddru[0]; |
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faddr6.s6_addr32[1] = kf->inp_faddru[1]; |
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faddr6.s6_addr32[2] = kf->inp_faddru[2]; |
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faddr6.s6_addr32[3] = kf->inp_faddru[3]; |
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if (IN6_IS_ADDR_UNSPECIFIED(&faddr6)) |
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return; |
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break; |
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} |
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} |
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/* finally enter the socket to the table */ |
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p = next_ns(); |
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if (p == NULL) { |
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error("Out of Memory!"); |
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return; |
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} |
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p->nif_lport = kf->inp_lport; |
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p->nif_fport = kf->inp_fport; |
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p->nif_proto = kf->so_protocol; |
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p->nif_ipproto = kf->inp_proto; |
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switch (kf->so_family) { |
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case AF_INET: |
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p->nif_family = AF_INET; |
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p->nif_laddr.s_addr = kf->inp_laddru[0]; |
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p->nif_faddr.s_addr = kf->inp_faddru[0]; |
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break; |
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case AF_INET6: |
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p->nif_family = AF_INET6; |
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p->nif_laddr6.s6_addr32[0] = kf->inp_laddru[0]; |
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p->nif_laddr6.s6_addr32[1] = kf->inp_laddru[1]; |
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p->nif_laddr6.s6_addr32[2] = kf->inp_laddru[2]; |
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p->nif_laddr6.s6_addr32[3] = kf->inp_laddru[3]; |
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p->nif_faddr6.s6_addr32[0] = kf->inp_faddru[0]; |
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p->nif_faddr6.s6_addr32[1] = kf->inp_faddru[1]; |
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p->nif_faddr6.s6_addr32[2] = kf->inp_faddru[2]; |
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p->nif_faddr6.s6_addr32[3] = kf->inp_faddru[3]; |
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break; |
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} |
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p->nif_rcvcc = kf->so_rcv_cc; |
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p->nif_sndcc = kf->so_snd_cc; |
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p->nif_state = kf->t_state; |
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#undef s6_addr32 |
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} |
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250 |
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/* netstat callback functions */ |
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int |
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select_ns(void) |
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{ |
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num_disp = num_ns; |
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return (0); |
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} |
258 |
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259 |
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static int type_map[] = { -1, 2, 3, 1, 4, 5 }; |
260 |
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261 |
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static int |
262 |
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kf_comp(const void *a, const void *b) |
263 |
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{ |
264 |
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const struct kinfo_file *ka = a, *kb = b; |
265 |
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266 |
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if (ka->so_family != kb->so_family) { |
267 |
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/* AF_INET < AF_INET6 < AF_LOCAL */ |
268 |
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if (ka->so_family == AF_INET) |
269 |
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return (-1); |
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if (ka->so_family == AF_LOCAL) |
271 |
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return (1); |
272 |
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if (kb->so_family == AF_LOCAL) |
273 |
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return (-1); |
274 |
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return (1); |
275 |
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} |
276 |
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if (ka->so_family == AF_LOCAL) { |
277 |
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if (type_map[ka->so_type] < type_map[kb->so_type]) |
278 |
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return (-1); |
279 |
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if (type_map[ka->so_type] > type_map[kb->so_type]) |
280 |
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return (1); |
281 |
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} else if (ka->so_family == AF_INET || ka->so_family == AF_INET6) { |
282 |
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if (ka->so_protocol < kb->so_protocol) |
283 |
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return (-1); |
284 |
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if (ka->so_protocol > kb->so_protocol) |
285 |
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return (1); |
286 |
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if (ka->so_type == SOCK_DGRAM || ka->so_type == SOCK_STREAM) { |
287 |
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/* order sockets by remote port desc */ |
288 |
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if (ka->inp_fport > kb->inp_fport) |
289 |
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return (-1); |
290 |
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if (ka->inp_fport < kb->inp_fport) |
291 |
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return (1); |
292 |
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} else if (ka->so_type == SOCK_RAW) { |
293 |
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if (ka->inp_proto > kb->inp_proto) |
294 |
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return (-1); |
295 |
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if (ka->inp_proto < kb->inp_proto) |
296 |
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return (1); |
297 |
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} |
298 |
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} |
299 |
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return (0); |
300 |
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} |
301 |
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302 |
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303 |
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int |
304 |
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read_ns(void) |
305 |
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{ |
306 |
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struct kinfo_file *kf; |
307 |
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int i, fcnt; |
308 |
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309 |
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if (kd == NULL) { |
310 |
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error("Failed to initialize KVM!"); |
311 |
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return (0); |
312 |
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} |
313 |
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kf = kvm_getfiles(kd, KERN_FILE_BYFILE, DTYPE_SOCKET, |
314 |
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sizeof(*kf), &fcnt); |
315 |
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if (kf == NULL) { |
316 |
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error("Out of Memory!"); |
317 |
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return (0); |
318 |
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} |
319 |
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320 |
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/* sort sockets by AF, proto and type */ |
321 |
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qsort(kf, fcnt, sizeof(*kf), kf_comp); |
322 |
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323 |
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num_ns = 0; |
324 |
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325 |
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for (i = 0; i < fcnt; i++) |
326 |
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enter(&kf[i]); |
327 |
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328 |
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num_disp = num_ns; |
329 |
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return 0; |
330 |
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} |
331 |
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332 |
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void |
333 |
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print_ns(void) |
334 |
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{ |
335 |
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int n, count = 0; |
336 |
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337 |
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for (n = dispstart; n < num_disp; n++) { |
338 |
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shownetstat(netinfos + n); |
339 |
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count++; |
340 |
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if (maxprint > 0 && count >= maxprint) |
341 |
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break; |
342 |
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} |
343 |
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} |
344 |
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|
345 |
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|
346 |
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int |
347 |
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initnetstat(void) |
348 |
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{ |
349 |
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field_view *v; |
350 |
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|
351 |
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protos = TCP|UDP|OTHER; |
352 |
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for (v = views_ns; v->name != NULL; v++) |
353 |
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add_view(v); |
354 |
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355 |
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return(1); |
356 |
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} |
357 |
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|
358 |
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static void |
359 |
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shownetstat(struct netinfo *p) |
360 |
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{ |
361 |
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char *proto = NULL; |
362 |
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|
363 |
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switch (p->nif_proto) { |
364 |
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case IPPROTO_TCP: |
365 |
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proto = "tcp"; |
366 |
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break; |
367 |
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case IPPROTO_UDP: |
368 |
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proto = "udp"; |
369 |
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break; |
370 |
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} |
371 |
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|
372 |
|
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switch (p->nif_family) { |
373 |
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case AF_INET: |
374 |
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inetprint(&p->nif_laddr, p->nif_lport, |
375 |
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proto, FLD_NS_LOCAL); |
376 |
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inetprint(&p->nif_faddr, p->nif_fport, |
377 |
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proto, FLD_NS_FOREIGN); |
378 |
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break; |
379 |
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case AF_INET6: |
380 |
|
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inet6print(&p->nif_laddr6, p->nif_lport, |
381 |
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proto, FLD_NS_LOCAL); |
382 |
|
|
inet6print(&p->nif_faddr6, p->nif_fport, |
383 |
|
|
proto, FLD_NS_FOREIGN); |
384 |
|
|
break; |
385 |
|
|
} |
386 |
|
|
|
387 |
|
|
tb_start(); |
388 |
|
|
switch (p->nif_proto) { |
389 |
|
|
case IPPROTO_TCP: |
390 |
|
|
case IPPROTO_UDP: |
391 |
|
|
tbprintf(proto); |
392 |
|
|
if (p->nif_family == AF_INET6) |
393 |
|
|
tbprintf("6"); |
394 |
|
|
break; |
395 |
|
|
case IPPROTO_DIVERT: |
396 |
|
|
tbprintf("divert"); |
397 |
|
|
if (p->nif_family == AF_INET6) |
398 |
|
|
tbprintf("6"); |
399 |
|
|
break; |
400 |
|
|
default: |
401 |
|
|
tbprintf("%d", p->nif_ipproto); |
402 |
|
|
break; |
403 |
|
|
} |
404 |
|
|
|
405 |
|
|
print_fld_tb(FLD_NS_PROTO); |
406 |
|
|
|
407 |
|
|
print_fld_size(FLD_NS_RECV_Q, p->nif_rcvcc); |
408 |
|
|
print_fld_size(FLD_NS_SEND_Q, p->nif_sndcc); |
409 |
|
|
|
410 |
|
|
if (p->nif_proto == IPPROTO_TCP) { |
411 |
|
|
if (p->nif_state < 0 || p->nif_state >= TCP_NSTATES) |
412 |
|
|
print_fld_uint(FLD_NS_STATE, p->nif_state); |
413 |
|
|
else |
414 |
|
|
print_fld_str(FLD_NS_STATE, tcpstates[p->nif_state]); |
415 |
|
|
} |
416 |
|
|
end_line(); |
417 |
|
|
} |
418 |
|
|
|
419 |
|
|
/* |
420 |
|
|
* Pretty print an Internet address (net address + port). |
421 |
|
|
* If the nflag was specified, use numbers instead of names. |
422 |
|
|
*/ |
423 |
|
|
static void |
424 |
|
|
inetprint(struct in_addr *in, int port, char *proto, field_def *fld) |
425 |
|
|
{ |
426 |
|
|
struct servent *sp = 0; |
427 |
|
|
|
428 |
|
|
tb_start(); |
429 |
|
|
tbprintf("%s", inetname(*in)); |
430 |
|
|
|
431 |
|
|
if (!nflag && port) |
432 |
|
|
sp = getservbyport(port, proto); |
433 |
|
|
if (sp || port == 0) |
434 |
|
|
tbprintf(":%s", sp ? sp->s_name : "*"); |
435 |
|
|
else |
436 |
|
|
tbprintf(":%d", ntohs((u_short)port)); |
437 |
|
|
|
438 |
|
|
print_fld_tb(fld); |
439 |
|
|
} |
440 |
|
|
|
441 |
|
|
static void |
442 |
|
|
inet6print(struct in6_addr *in6, int port, char *proto, field_def *fld) |
443 |
|
|
{ |
444 |
|
|
struct servent *sp = 0; |
445 |
|
|
|
446 |
|
|
tb_start(); |
447 |
|
|
|
448 |
|
|
tbprintf("%s", inet6name(in6)); |
449 |
|
|
if (!nflag && port) |
450 |
|
|
sp = getservbyport(port, proto); |
451 |
|
|
if (sp || port == 0) |
452 |
|
|
tbprintf(":%s", sp ? sp->s_name : "*"); |
453 |
|
|
else |
454 |
|
|
tbprintf(":%d", ntohs((u_short)port)); |
455 |
|
|
|
456 |
|
|
print_fld_tb(fld); |
457 |
|
|
} |
458 |
|
|
|
459 |
|
|
int |
460 |
|
|
ns_keyboard_callback(int ch) |
461 |
|
|
{ |
462 |
|
|
switch (ch) { |
463 |
|
|
case 'a': |
464 |
|
|
aflag = !aflag; |
465 |
|
|
gotsig_alarm = 1; |
466 |
|
|
break; |
467 |
|
|
case 'n': |
468 |
|
|
nflag = !nflag; |
469 |
|
|
gotsig_alarm = 1; |
470 |
|
|
break; |
471 |
|
|
case 'o': |
472 |
|
|
protos ^= OTHER; |
473 |
|
|
gotsig_alarm = 1; |
474 |
|
|
break; |
475 |
|
|
case 'r': |
476 |
|
|
aflag = 0; |
477 |
|
|
nflag = 1; |
478 |
|
|
protos = TCP|UDP; |
479 |
|
|
gotsig_alarm = 1; |
480 |
|
|
break; |
481 |
|
|
case 't': |
482 |
|
|
protos ^= TCP; |
483 |
|
|
gotsig_alarm = 1; |
484 |
|
|
break; |
485 |
|
|
case 'u': |
486 |
|
|
protos ^= UDP; |
487 |
|
|
gotsig_alarm = 1; |
488 |
|
|
break; |
489 |
|
|
default: |
490 |
|
|
return keyboard_callback(ch); |
491 |
|
|
}; |
492 |
|
|
|
493 |
|
|
return 1; |
494 |
|
|
} |
495 |
|
|
|