X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fping.c;h=658c015180dde346f32e4fa3f515db695f92ecb2;hb=28703015ab71784f40bc97f720ed900e26bd03ca;hp=70ea0f1961615b3f680306461d44322e545314f5;hpb=3570a34de46b1f7dedd16999bb1687e2d6b55d40;p=oweals%2Fbusybox.git diff --git a/networking/ping.c b/networking/ping.c index 70ea0f196..658c01518 100644 --- a/networking/ping.c +++ b/networking/ping.c @@ -1,43 +1,22 @@ /* vi: set sw=4 ts=4: */ /* - * $Id: ping.c,v 1.25 2000/09/25 21:45:58 andersen Exp $ + * $Id: ping.c,v 1.56 2004/03/15 08:28:48 andersen Exp $ * Mini ping implementation for busybox * * Copyright (C) 1999 by Randolph Chung * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * This version of ping is adapted from the ping in netkit-base 0.10, - * which is: - * + * Adapted from the ping in netkit-base 0.10: * Copyright (c) 1989 The Regents of the University of California. - * All rights reserved. + * Derived from software contributed to Berkeley by Mike Muuss. * - * This code is derived from software contributed to Berkeley by - * Mike Muuss. - * - * Original copyright notice is retained at the end of this file. + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ -#include "busybox.h" #include #include #include -#include #include -#include +#include #include #include @@ -47,108 +26,25 @@ #include #include #include +#include +#include +#include +#include "busybox.h" - -/* It turns out that libc5 doesn't have proper icmp support - * built into it header files, so we have to supplement it */ -#if ! defined __GLIBC__ && ! defined __UCLIBC__ -typedef unsigned int socklen_t; - -#define ICMP_MINLEN 8 /* abs minimum */ - -struct icmp_ra_addr -{ - u_int32_t ira_addr; - u_int32_t ira_preference; -}; - - -struct icmp -{ - u_int8_t icmp_type; /* type of message, see below */ - u_int8_t icmp_code; /* type sub code */ - u_int16_t icmp_cksum; /* ones complement checksum of struct */ - union - { - u_char ih_pptr; /* ICMP_PARAMPROB */ - struct in_addr ih_gwaddr; /* gateway address */ - struct ih_idseq /* echo datagram */ - { - u_int16_t icd_id; - u_int16_t icd_seq; - } ih_idseq; - u_int32_t ih_void; - - /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */ - struct ih_pmtu - { - u_int16_t ipm_void; - u_int16_t ipm_nextmtu; - } ih_pmtu; - - struct ih_rtradv - { - u_int8_t irt_num_addrs; - u_int8_t irt_wpa; - u_int16_t irt_lifetime; - } ih_rtradv; - } icmp_hun; -#define icmp_pptr icmp_hun.ih_pptr -#define icmp_gwaddr icmp_hun.ih_gwaddr -#define icmp_id icmp_hun.ih_idseq.icd_id -#define icmp_seq icmp_hun.ih_idseq.icd_seq -#define icmp_void icmp_hun.ih_void -#define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void -#define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu -#define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs -#define icmp_wpa icmp_hun.ih_rtradv.irt_wpa -#define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime - union - { - struct - { - u_int32_t its_otime; - u_int32_t its_rtime; - u_int32_t its_ttime; - } id_ts; - struct - { - struct ip idi_ip; - /* options and then 64 bits of data */ - } id_ip; - struct icmp_ra_addr id_radv; - u_int32_t id_mask; - u_int8_t id_data[1]; - } icmp_dun; -#define icmp_otime icmp_dun.id_ts.its_otime -#define icmp_rtime icmp_dun.id_ts.its_rtime -#define icmp_ttime icmp_dun.id_ts.its_ttime -#define icmp_ip icmp_dun.id_ip.idi_ip -#define icmp_radv icmp_dun.id_radv -#define icmp_mask icmp_dun.id_mask -#define icmp_data icmp_dun.id_data +enum { + DEFDATALEN = 56, + MAXIPLEN = 60, + MAXICMPLEN = 76, + MAXPACKET = 65468, + MAX_DUP_CHK = (8 * 128), + MAXWAIT = 10, + PINGINTERVAL = 1 /* second */ }; -#endif - -#define DEFDATALEN 56 -#define MAXIPLEN 60 -#define MAXICMPLEN 76 -#define MAXPACKET 65468 -#define MAX_DUP_CHK (8 * 128) -#define MAXWAIT 10 -#define PINGINTERVAL 1 /* second */ - -#define O_QUIET (1 << 0) - -#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ -#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ -#define SET(bit) (A(bit) |= B(bit)) -#define CLR(bit) (A(bit) &= (~B(bit))) -#define TST(bit) (A(bit) & B(bit)) static void ping(const char *host); /* common routines */ + static int in_cksum(unsigned short *buf, int sz) { int nleft = sz; @@ -169,17 +65,19 @@ static int in_cksum(unsigned short *buf, int sz) sum = (sum >> 16) + (sum & 0xFFFF); sum += (sum >> 16); ans = ~sum; - return (ans); + return ans; } +#ifndef CONFIG_FEATURE_FANCY_PING + /* simple version */ -#ifdef BB_FEATURE_SIMPLE_PING -static char *hostname = NULL; + +static char *hostname; static void noresp(int ign) { printf("No response from %s\n", hostname); - exit(0); + exit(EXIT_FAILURE); } static void ping(const char *host) @@ -190,21 +88,12 @@ static void ping(const char *host) int pingsock, c; char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN]; - if ((pingsock = socket(AF_INET, SOCK_RAW, 1)) < 0) { /* 1 == ICMP */ - perror("ping: creating a raw socket"); - exit(1); - } - - /* drop root privs if running setuid */ - setuid(getuid()); + pingsock = create_icmp_socket(); memset(&pingaddr, 0, sizeof(struct sockaddr_in)); pingaddr.sin_family = AF_INET; - if (!(h = gethostbyname(host))) { - errorMsg("unknown host %s\n", host); - exit(1); - } + h = xgethostbyname(host); memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr)); hostname = h->h_name; @@ -213,14 +102,12 @@ static void ping(const char *host) pkt->icmp_type = ICMP_ECHO; pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet)); - c = sendto(pingsock, packet, sizeof(packet), 0, + c = sendto(pingsock, packet, DEFDATALEN + ICMP_MINLEN, 0, (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in)); - if (c < 0 || c != sizeof(packet)) { - if (c < 0) - perror("ping: sendto"); - errorMsg("write incomplete\n"); - exit(1); + if (c < 0) { + if (ENABLE_FEATURE_CLEAN_UP) close(pingsock); + bb_perror_msg_and_die("sendto"); } signal(SIGALRM, noresp); @@ -228,13 +115,13 @@ static void ping(const char *host) /* listen for replies */ while (1) { struct sockaddr_in from; - size_t fromlen = sizeof(from); + socklen_t fromlen = sizeof(from); if ((c = recvfrom(pingsock, packet, sizeof(packet), 0, (struct sockaddr *) &from, &fromlen)) < 0) { if (errno == EINTR) continue; - perror("ping: recvfrom"); + bb_perror_msg("recvfrom"); continue; } if (c >= 76) { /* ip + icmp */ @@ -245,36 +132,52 @@ static void ping(const char *host) break; } } + if (ENABLE_FEATURE_CLEAN_UP) close(pingsock); printf("%s is alive!\n", hostname); return; } -extern int ping_main(int argc, char **argv) +int ping_main(int argc, char **argv) { argc--; argv++; if (argc < 1) - usage(ping_usage); + bb_show_usage(); ping(*argv); - exit(TRUE); + return EXIT_SUCCESS; } -#else /* ! BB_FEATURE_SIMPLE_PING */ +#else /* ! CONFIG_FEATURE_FANCY_PING */ + /* full(er) version */ -static char *hostname = NULL; + +#define OPT_STRING "qc:s:I:" +enum { + OPT_QUIET = 1 << 0, +}; + static struct sockaddr_in pingaddr; +static struct sockaddr_in sourceaddr; static int pingsock = -1; -static int datalen = DEFDATALEN; +static unsigned datalen; /* intentionally uninitialized to work around gcc bug */ -static long ntransmitted = 0, nreceived = 0, nrepeats = 0, pingcount = 0; -static int myid = 0, options = 0; -static unsigned long tmin = ULONG_MAX, tmax = 0, tsum = 0; +static unsigned long ntransmitted, nreceived, nrepeats, pingcount; +static int myid; +static unsigned long tmin = ULONG_MAX, tmax, tsum; static char rcvd_tbl[MAX_DUP_CHK / 8]; +static struct hostent *hostent; + static void sendping(int); static void pingstats(int); static void unpack(char *, int, struct sockaddr_in *); +#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ +#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ +#define SET(bit) (A(bit) |= B(bit)) +#define CLR(bit) (A(bit) &= (~B(bit))) +#define TST(bit) (A(bit) & B(bit)) + /**************************************************************************/ static void pingstats(int junk) @@ -283,13 +186,13 @@ static void pingstats(int junk) signal(SIGINT, SIG_IGN); - printf("\n--- %s ping statistics ---\n", hostname); - printf("%ld packets transmitted, ", ntransmitted); - printf("%ld packets received, ", nreceived); + printf("\n--- %s ping statistics ---\n", hostent->h_name); + printf("%lu packets transmitted, ", ntransmitted); + printf("%lu packets received, ", nreceived); if (nrepeats) - printf("%ld duplicates, ", nrepeats); + printf("%lu duplicates, ", nrepeats); if (ntransmitted) - printf("%ld%% packet loss\n", + printf("%lu%% packet loss\n", (ntransmitted - nreceived) * 100 / ntransmitted); if (nreceived) printf("round-trip min/avg/max = %lu.%lu/%lu.%lu/%lu.%lu ms\n", @@ -307,27 +210,27 @@ static void sendping(int junk) { struct icmp *pkt; int i; - char packet[datalen + 8]; + char packet[datalen + ICMP_MINLEN]; pkt = (struct icmp *) packet; pkt->icmp_type = ICMP_ECHO; pkt->icmp_code = 0; pkt->icmp_cksum = 0; - pkt->icmp_seq = ntransmitted++; + pkt->icmp_seq = htons(ntransmitted++); pkt->icmp_id = myid; - CLR(pkt->icmp_seq % MAX_DUP_CHK); + CLR(ntohs(pkt->icmp_seq) % MAX_DUP_CHK); - gettimeofday((struct timeval *) &packet[8], NULL); + gettimeofday((struct timeval *) &pkt->icmp_dun, NULL); pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet)); i = sendto(pingsock, packet, sizeof(packet), 0, (struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in)); if (i < 0) - fatalError("sendto: %s\n", strerror(errno)); + bb_perror_msg_and_die("sendto"); else if ((size_t)i != sizeof(packet)) - fatalError("ping wrote %d chars; %d expected\n", i, + bb_error_msg_and_die("ping wrote %d chars; %d expected", i, (int)sizeof(packet)); signal(SIGALRM, sendping); @@ -340,23 +243,23 @@ static void sendping(int junk) } } -static char *icmp_type_name (int id) +static char *icmp_type_name(int id) { switch (id) { - case ICMP_ECHOREPLY: return "Echo Reply"; - case ICMP_DEST_UNREACH: return "Destination Unreachable"; - case ICMP_SOURCE_QUENCH: return "Source Quench"; - case ICMP_REDIRECT: return "Redirect (change route)"; - case ICMP_ECHO: return "Echo Request"; - case ICMP_TIME_EXCEEDED: return "Time Exceeded"; - case ICMP_PARAMETERPROB: return "Parameter Problem"; - case ICMP_TIMESTAMP: return "Timestamp Request"; - case ICMP_TIMESTAMPREPLY: return "Timestamp Reply"; - case ICMP_INFO_REQUEST: return "Information Request"; - case ICMP_INFO_REPLY: return "Information Reply"; - case ICMP_ADDRESS: return "Address Mask Request"; - case ICMP_ADDRESSREPLY: return "Address Mask Reply"; - default: return "unknown ICMP type"; + case ICMP_ECHOREPLY: return "Echo Reply"; + case ICMP_DEST_UNREACH: return "Destination Unreachable"; + case ICMP_SOURCE_QUENCH: return "Source Quench"; + case ICMP_REDIRECT: return "Redirect (change route)"; + case ICMP_ECHO: return "Echo Request"; + case ICMP_TIME_EXCEEDED: return "Time Exceeded"; + case ICMP_PARAMETERPROB: return "Parameter Problem"; + case ICMP_TIMESTAMP: return "Timestamp Request"; + case ICMP_TIMESTAMPREPLY: return "Timestamp Reply"; + case ICMP_INFO_REQUEST: return "Information Request"; + case ICMP_INFO_REPLY: return "Information Reply"; + case ICMP_ADDRESS: return "Address Mask Request"; + case ICMP_ADDRESSREPLY: return "Address Mask Reply"; + default: return "unknown ICMP type"; } } @@ -370,21 +273,21 @@ static void unpack(char *buf, int sz, struct sockaddr_in *from) gettimeofday(&tv, NULL); - /* check IP header */ - iphdr = (struct iphdr *) buf; - hlen = iphdr->ihl << 2; /* discard if too short */ if (sz < (datalen + ICMP_MINLEN)) return; + /* check IP header */ + iphdr = (struct iphdr *) buf; + hlen = iphdr->ihl << 2; sz -= hlen; icmppkt = (struct icmp *) (buf + hlen); - if (icmppkt->icmp_id != myid) - return; /* not our ping */ + return; /* not our ping */ if (icmppkt->icmp_type == ICMP_ECHOREPLY) { - ++nreceived; + u_int16_t recv_seq = ntohs(icmppkt->icmp_seq); + ++nreceived; tp = (struct timeval *) icmppkt->icmp_data; if ((tv.tv_usec -= tp->tv_usec) < 0) { @@ -400,88 +303,69 @@ static void unpack(char *buf, int sz, struct sockaddr_in *from) if (triptime > tmax) tmax = triptime; - if (TST(icmppkt->icmp_seq % MAX_DUP_CHK)) { + if (TST(recv_seq % MAX_DUP_CHK)) { ++nrepeats; --nreceived; dupflag = 1; } else { - SET(icmppkt->icmp_seq % MAX_DUP_CHK); + SET(recv_seq % MAX_DUP_CHK); dupflag = 0; } - if (options & O_QUIET) + if (option_mask32 & OPT_QUIET) return; printf("%d bytes from %s: icmp_seq=%u", sz, inet_ntoa(*(struct in_addr *) &from->sin_addr.s_addr), - icmppkt->icmp_seq); + recv_seq); printf(" ttl=%d", iphdr->ttl); printf(" time=%lu.%lu ms", triptime / 10, triptime % 10); if (dupflag) printf(" (DUP!)"); - printf("\n"); - } else + puts(""); + } else if (icmppkt->icmp_type != ICMP_ECHO) - errorMsg("Warning: Got ICMP %d (%s)\n", - icmppkt->icmp_type, icmp_type_name (icmppkt->icmp_type)); + bb_error_msg("warning: got ICMP %d (%s)", + icmppkt->icmp_type, icmp_type_name(icmppkt->icmp_type)); + fflush(stdout); } static void ping(const char *host) { - struct protoent *proto; - struct hostent *h; - char buf[MAXHOSTNAMELEN]; char packet[datalen + MAXIPLEN + MAXICMPLEN]; int sockopt; - proto = getprotobyname("icmp"); - /* if getprotobyname failed, just silently force - * proto->p_proto to have the correct value for "icmp" */ - if ((pingsock = socket(AF_INET, SOCK_RAW, - (proto ? proto->p_proto : 1))) < 0) { /* 1 == ICMP */ - if (errno == EPERM) { - errorMsg("permission denied. (are you root?)\n"); - } else { - perror("ping: creating a raw socket"); - } - exit(1); - } + pingsock = create_icmp_socket(); - /* drop root privs if running setuid */ - setuid(getuid()); + if (sourceaddr.sin_addr.s_addr) { + xbind(pingsock, (struct sockaddr*)&sourceaddr, sizeof(sourceaddr)); + } memset(&pingaddr, 0, sizeof(struct sockaddr_in)); pingaddr.sin_family = AF_INET; - if (!(h = gethostbyname(host))) { - errorMsg("unknown host %s\n", host); - exit(1); - } + hostent = xgethostbyname(host); + if (hostent->h_addrtype != AF_INET) + bb_error_msg_and_die("unknown address type; only AF_INET is currently supported"); - if (h->h_addrtype != AF_INET) { - errorMsg("unknown address type; only AF_INET is currently supported.\n"); - exit(1); - } - - pingaddr.sin_family = AF_INET; /* h->h_addrtype */ - memcpy(&pingaddr.sin_addr, h->h_addr, sizeof(pingaddr.sin_addr)); - strncpy(buf, h->h_name, sizeof(buf) - 1); - hostname = buf; + memcpy(&pingaddr.sin_addr, hostent->h_addr, sizeof(pingaddr.sin_addr)); /* enable broadcast pings */ - sockopt = 1; - setsockopt(pingsock, SOL_SOCKET, SO_BROADCAST, (char *) &sockopt, - sizeof(sockopt)); + setsockopt_broadcast(pingsock); /* set recv buf for broadcast pings */ sockopt = 48 * 1024; setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt, sizeof(sockopt)); - printf("PING %s (%s): %d data bytes\n", - hostname, - inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr), - datalen); + printf("PING %s (%s)", + hostent->h_name, + inet_ntoa(*(struct in_addr *) &pingaddr.sin_addr.s_addr)); + if (sourceaddr.sin_addr.s_addr) { + printf(" from %s", + inet_ntoa(*(struct in_addr *) &sourceaddr.sin_addr.s_addr)); + } + printf(": %d data bytes\n", datalen); signal(SIGINT, pingstats); @@ -498,7 +382,7 @@ static void ping(const char *host) (struct sockaddr *) &from, &fromlen)) < 0) { if (errno == EINTR) continue; - perror("ping: recvfrom"); + bb_perror_msg("recvfrom"); continue; } unpack(packet, c, &from); @@ -508,80 +392,49 @@ static void ping(const char *host) pingstats(0); } -extern int ping_main(int argc, char **argv) +/* TODO: consolidate ether-wake.c, dnsd.c, ifupdown.c, nslookup.c + * versions of below thing. BTW we have far too many "%u.%u.%u.%u" too... +*/ +static int parse_nipquad(const char *str, struct sockaddr_in* addr) { - char *thisarg; + char dummy; + unsigned i1, i2, i3, i4; + if (sscanf(str, "%u.%u.%u.%u%c", + &i1, &i2, &i3, &i4, &dummy) == 4 + && ( (i1|i2|i3|i4) <= 0xff ) + ) { + uint8_t* ptr = (uint8_t*)&addr->sin_addr; + ptr[0] = i1; + ptr[1] = i2; + ptr[2] = i3; + ptr[3] = i4; + return 0; + } + return 1; /* error */ +} - argc--; - argv++; - options = 0; - /* Parse any options */ - while (argc >= 1 && **argv == '-') { - thisarg = *argv; - thisarg++; - switch (*thisarg) { - case 'q': - options |= O_QUIET; - break; - case 'c': - if (--argc <= 0) - usage(ping_usage); - argv++; - pingcount = atoi(*argv); - break; - case 's': - if (--argc <= 0) - usage(ping_usage); - argv++; - datalen = atoi(*argv); - break; - default: - usage(ping_usage); - } - argc--; - argv++; +int ping_main(int argc, char **argv) +{ + char *opt_c, *opt_s, *opt_I; + + datalen = DEFDATALEN; /* initialized here rather than in global scope to work around gcc bug */ + + /* exactly one argument needed */ + opt_complementary = "=1"; + getopt32(argc, argv, OPT_STRING, &opt_c, &opt_s, &opt_I); + if (option_mask32 & 2) pingcount = xatoul(opt_c); // -c + if (option_mask32 & 4) datalen = xatou16(opt_s); // -s + if (option_mask32 & 8) { // -I +/* TODO: ping6 accepts iface too: + if_index = if_nametoindex(*argv); + if (!if_index) ... +make it true for ping. */ + if (parse_nipquad(opt_I, &sourceaddr)) + bb_show_usage(); } - if (argc < 1) - usage(ping_usage); - myid = getpid() & 0xFFFF; - ping(*argv); - return(TRUE); + myid = (int16_t) getpid(); + ping(argv[optind]); + return EXIT_SUCCESS; } -#endif /* ! BB_FEATURE_SIMPLE_PING */ - -/* - * Copyright (c) 1989 The Regents of the University of California. - * All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Mike Muuss. - * - * 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. - */ +#endif /* ! CONFIG_FEATURE_FANCY_PING */