Fix a problem that reply packets are not received when -i T option is set
and (T < RTT). - Use select(2) for timeout instead of interval timer. Remove poll(2) support. - Use sigaction(2) instead of signal(3). - Exit in SIGINT handler when two signals are received and doing reverse DNS lookup as ping(8) does. - Remove redundant variables used for getaddrinfo(3). PR: 151023
This commit is contained in:
Hiroki Sato
parent
58da716138
commit
0ecaa7ed05
@ -4,7 +4,7 @@ PROG= ping6
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MAN= ping6.8
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CFLAGS+=-DIPSEC -DKAME_SCOPEID -DUSE_RFC2292BIS \
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-DHAVE_POLL_H -DHAVE_ARC4RANDOM
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-DHAVE_ARC4RANDOM
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WARNS?= 2
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BINOWN= root
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@ -125,10 +125,8 @@ __FBSDID("$FreeBSD$");
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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#ifdef HAVE_POLL_H
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#include <poll.h>
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#endif
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#ifdef IPSEC
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#include <netipsec/ah.h>
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@ -207,7 +205,6 @@ u_int options;
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int mx_dup_ck = MAX_DUP_CHK;
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char rcvd_tbl[MAX_DUP_CHK / 8];
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struct addrinfo *res = NULL;
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struct sockaddr_in6 dst; /* who to ping6 */
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struct sockaddr_in6 src; /* src addr of this packet */
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socklen_t srclen;
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@ -223,12 +220,6 @@ u_int8_t nonce[8]; /* nonce field for node information */
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int hoplimit = -1; /* hoplimit */
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int pathmtu = 0; /* path MTU for the destination. 0 = unspec. */
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u_char *packet = NULL;
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#ifdef HAVE_POLL_H
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struct pollfd fdmaskp[1];
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#else
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fd_set *fdmaskp = NULL;
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int fdmasks;
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#endif
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/* counters */
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long nmissedmax; /* max value of ntransmitted - nreceived - 1 */
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@ -236,7 +227,7 @@ long npackets; /* max packets to transmit */
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long nreceived; /* # of packets we got back */
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long nrepeats; /* number of duplicates */
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long ntransmitted; /* sequence # for outbound packets = #sent */
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struct timeval interval = {1, 0}; /* interval between packets */
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int interval = 1000; /* interval between packets in ms */
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/* timing */
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int timing; /* flag to do timing */
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@ -253,7 +244,6 @@ struct msghdr smsghdr;
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struct iovec smsgiov;
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char *scmsg = 0;
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volatile sig_atomic_t seenalrm;
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volatile sig_atomic_t seenint;
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#ifdef SIGINFO
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volatile sig_atomic_t seeninfo;
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@ -265,7 +255,6 @@ int get_hoplim(struct msghdr *);
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int get_pathmtu(struct msghdr *);
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struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
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void onsignal(int);
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void retransmit(void);
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void onint(int);
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size_t pingerlen(void);
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int pinger(void);
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@ -293,19 +282,15 @@ void usage(void);
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int
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main(int argc, char *argv[])
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{
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struct itimerval itimer;
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struct sockaddr_in6 from;
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struct timeval last, intvl;
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struct sockaddr_in6 from, *sin6;
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#ifndef HAVE_ARC4RANDOM
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struct timeval seed;
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#endif
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#ifdef HAVE_POLL_H
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int timeout;
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#else
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struct timeval timeout, *tv;
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#endif
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struct addrinfo hints;
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struct addrinfo hints, *res;
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struct sigaction si_sa;
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int cc, i;
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int ch, hold, packlen, preload, optval, ret_ga;
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int almost_done, ch, hold, packlen, preload, optval, error;
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int nig_oldmcprefix = -1;
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u_char *datap;
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char *e, *target, *ifname = NULL, *gateway = NULL;
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@ -326,7 +311,7 @@ main(int argc, char *argv[])
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char *policy_in = NULL;
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char *policy_out = NULL;
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#endif
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double intval;
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double t;
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size_t rthlen;
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#ifdef IPV6_USE_MIN_MTU
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int mflag = 0;
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@ -450,22 +435,22 @@ main(int argc, char *argv[])
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#endif
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break;
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case 'i': /* wait between sending packets */
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intval = strtod(optarg, &e);
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t = strtod(optarg, &e);
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if (*optarg == '\0' || *e != '\0')
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errx(1, "illegal timing interval %s", optarg);
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if (intval < 1 && getuid()) {
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if (t < 1 && getuid()) {
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errx(1, "%s: only root may use interval < 1s",
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strerror(EPERM));
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}
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interval.tv_sec = (long)intval;
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interval.tv_usec =
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(long)((intval - interval.tv_sec) * 1000000);
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if (interval.tv_sec < 0)
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intvl.tv_sec = (long)t;
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intvl.tv_usec =
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(long)((t - intvl.tv_sec) * 1000000);
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if (intvl.tv_sec < 0)
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errx(1, "illegal timing interval %s", optarg);
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/* less than 1/hz does not make sense */
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if (interval.tv_sec == 0 && interval.tv_usec < 1) {
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if (intvl.tv_sec == 0 && intvl.tv_usec < 1) {
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warnx("too small interval, raised to .000001");
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interval.tv_usec = 1;
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intvl.tv_usec = 1;
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}
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options |= F_INTERVAL;
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break;
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@ -516,10 +501,10 @@ main(int argc, char *argv[])
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hints.ai_socktype = SOCK_RAW;
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hints.ai_protocol = IPPROTO_ICMPV6;
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ret_ga = getaddrinfo(optarg, NULL, &hints, &res);
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if (ret_ga) {
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error = getaddrinfo(optarg, NULL, &hints, &res);
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if (error) {
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errx(1, "invalid source address: %s",
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gai_strerror(ret_ga));
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gai_strerror(error));
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}
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/*
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* res->ai_family must be AF_INET6 and res->ai_addrlen
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@ -622,9 +607,9 @@ main(int argc, char *argv[])
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hints.ai_socktype = SOCK_RAW;
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hints.ai_protocol = IPPROTO_ICMPV6;
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ret_ga = getaddrinfo(target, NULL, &hints, &res);
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if (ret_ga)
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errx(1, "%s", gai_strerror(ret_ga));
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error = getaddrinfo(target, NULL, &hints, &res);
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if (error)
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errx(1, "%s", gai_strerror(error));
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if (res->ai_canonname)
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hostname = res->ai_canonname;
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else
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@ -647,28 +632,25 @@ main(int argc, char *argv[])
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/* set the gateway (next hop) if specified */
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if (gateway) {
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struct addrinfo ghints, *gres;
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int error;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_INET6;
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hints.ai_socktype = SOCK_RAW;
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hints.ai_protocol = IPPROTO_ICMPV6;
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memset(&ghints, 0, sizeof(ghints));
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ghints.ai_family = AF_INET6;
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ghints.ai_socktype = SOCK_RAW;
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ghints.ai_protocol = IPPROTO_ICMPV6;
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error = getaddrinfo(gateway, NULL, &hints, &gres);
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error = getaddrinfo(gateway, NULL, &hints, &res);
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if (error) {
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errx(1, "getaddrinfo for the gateway %s: %s",
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gateway, gai_strerror(error));
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}
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if (gres->ai_next && (options & F_VERBOSE))
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if (res->ai_next && (options & F_VERBOSE))
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warnx("gateway resolves to multiple addresses");
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if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
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gres->ai_addr, gres->ai_addrlen)) {
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res->ai_addr, res->ai_addrlen)) {
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err(1, "setsockopt(IPV6_NEXTHOP)");
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}
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freeaddrinfo(gres);
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freeaddrinfo(res);
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}
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/*
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@ -898,7 +880,7 @@ main(int argc, char *argv[])
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}
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if (argc > 1) { /* some intermediate addrs are specified */
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int hops, error;
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int hops;
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#ifdef USE_RFC2292BIS
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int rthdrlen;
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#endif
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@ -920,26 +902,25 @@ main(int argc, char *argv[])
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#endif /* USE_RFC2292BIS */
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for (hops = 0; hops < argc - 1; hops++) {
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struct addrinfo *iaip;
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_INET6;
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if ((error = getaddrinfo(argv[hops], NULL, &hints,
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&iaip)))
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&res)))
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errx(1, "%s", gai_strerror(error));
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if (SIN6(iaip->ai_addr)->sin6_family != AF_INET6)
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if (res->ai_addr->sa_family != AF_INET6)
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errx(1,
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"bad addr family of an intermediate addr");
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sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr;
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#ifdef USE_RFC2292BIS
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if (inet6_rth_add(rthdr,
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&(SIN6(iaip->ai_addr))->sin6_addr))
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if (inet6_rth_add(rthdr, &sin6->sin6_addr))
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errx(1, "can't add an intermediate node");
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#else /* old advanced API */
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if (inet6_rthdr_add(scmsgp,
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&(SIN6(iaip->ai_addr))->sin6_addr,
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if (inet6_rthdr_add(scmsg, &sin6->sin6_addr,
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IPV6_RTHDR_LOOSE))
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errx(1, "can't add an intermediate node");
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#endif /* USE_RFC2292BIS */
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freeaddrinfo(iaip);
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freeaddrinfo(res);
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}
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#ifndef USE_RFC2292BIS
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@ -1055,52 +1036,46 @@ main(int argc, char *argv[])
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printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
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printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
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while (preload--) /* Fire off them quickies. */
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(void)pinger();
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(void)signal(SIGINT, onsignal);
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#ifdef SIGINFO
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(void)signal(SIGINFO, onsignal);
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#endif
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if ((options & F_FLOOD) == 0) {
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(void)signal(SIGALRM, onsignal);
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itimer.it_interval = interval;
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itimer.it_value = interval;
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(void)setitimer(ITIMER_REAL, &itimer, NULL);
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if (ntransmitted == 0)
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retransmit();
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if (preload == 0)
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pinger();
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else {
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if (npackets != 0 && preload > npackets)
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preload = npackets;
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while (preload--)
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pinger();
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}
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gettimeofday(&last, NULL);
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#ifndef HAVE_POLL_H
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fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask);
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if ((fdmaskp = malloc(fdmasks)) == NULL)
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err(1, "malloc");
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#endif
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seenalrm = seenint = 0;
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sigemptyset(&si_sa.sa_mask);
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si_sa.sa_flags = 0;
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si_sa.sa_handler = onsignal;
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if (sigaction(SIGINT, &si_sa, 0) == -1)
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err(EX_OSERR, "sigaction SIGINT");
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seenint = 0;
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#ifdef SIGINFO
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if (sigaction(SIGINFO, &si_sa, 0) == -1)
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err(EX_OSERR, "sigaction SIGINFO");
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seeninfo = 0;
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#endif
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if (options & F_FLOOD) {
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intvl.tv_sec = 0;
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intvl.tv_usec = 10000;
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} else if ((options & F_INTERVAL) == 0) {
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intvl.tv_sec = interval / 1000;
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intvl.tv_usec = interval % 1000 * 1000;
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}
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for (;;) {
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almost_done = 0;
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while (seenint == 0) {
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struct timeval now, timeout;
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struct msghdr m;
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struct iovec iov[2];
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fd_set rfds;
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int n;
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/* signal handling */
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if (seenalrm) {
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/* last packet sent, timeout reached? */
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if (npackets && ntransmitted >= npackets)
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break;
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retransmit();
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seenalrm = 0;
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continue;
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}
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if (seenint) {
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if (seenint)
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onint(SIGINT);
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seenint = 0;
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continue;
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}
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#ifdef SIGINFO
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if (seeninfo) {
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summary();
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@ -1108,93 +1083,104 @@ main(int argc, char *argv[])
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continue;
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}
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#endif
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if (options & F_FLOOD) {
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(void)pinger();
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#ifdef HAVE_POLL_H
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timeout = 10;
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#else
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timeout.tv_sec = 0;
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timeout.tv_usec = 10000;
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tv = &timeout;
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#endif
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} else {
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#ifdef HAVE_POLL_H
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timeout = INFTIM;
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#else
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tv = NULL;
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#endif
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FD_ZERO(&rfds);
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FD_SET(s, &rfds);
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gettimeofday(&now, NULL);
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timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
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timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
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while (timeout.tv_usec < 0) {
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timeout.tv_usec += 1000000;
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timeout.tv_sec--;
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}
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#ifdef HAVE_POLL_H
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fdmaskp[0].fd = s;
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fdmaskp[0].events = POLLIN;
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cc = poll(fdmaskp, 1, timeout);
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#else
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memset(fdmaskp, 0, fdmasks);
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FD_SET(s, fdmaskp);
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cc = select(s + 1, fdmaskp, NULL, NULL, tv);
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#endif
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if (cc < 0) {
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if (errno != EINTR) {
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#ifdef HAVE_POLL_H
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warn("poll");
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#else
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warn("select");
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#endif
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sleep(1);
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}
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continue;
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} else if (cc == 0)
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continue;
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while (timeout.tv_usec > 1000000) {
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timeout.tv_usec -= 1000000;
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timeout.tv_sec++;
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}
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if (timeout.tv_sec < 0)
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timeout.tv_sec = timeout.tv_usec = 0;
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m.msg_name = (caddr_t)&from;
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m.msg_namelen = sizeof(from);
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memset(&iov, 0, sizeof(iov));
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iov[0].iov_base = (caddr_t)packet;
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iov[0].iov_len = packlen;
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m.msg_iov = iov;
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m.msg_iovlen = 1;
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memset(cm, 0, CONTROLLEN);
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m.msg_control = (void *)cm;
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m.msg_controllen = CONTROLLEN;
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n = select(s + 1, &rfds, NULL, NULL, &timeout);
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if (n < 0)
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continue; /* EINTR */
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if (n == 1) {
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m.msg_name = (caddr_t)&from;
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m.msg_namelen = sizeof(from);
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memset(&iov, 0, sizeof(iov));
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iov[0].iov_base = (caddr_t)packet;
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iov[0].iov_len = packlen;
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m.msg_iov = iov;
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m.msg_iovlen = 1;
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memset(cm, 0, CONTROLLEN);
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m.msg_control = (void *)cm;
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m.msg_controllen = CONTROLLEN;
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cc = recvmsg(s, &m, 0);
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if (cc < 0) {
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if (errno != EINTR) {
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warn("recvmsg");
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sleep(1);
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}
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continue;
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} else if (cc == 0) {
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int mtu;
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/*
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* receive control messages only. Process the
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* exceptions (currently the only possibility is
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* a path MTU notification.)
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*/
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if ((mtu = get_pathmtu(&m)) > 0) {
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if ((options & F_VERBOSE) != 0) {
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printf("new path MTU (%d) is "
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"notified\n", mtu);
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cc = recvmsg(s, &m, 0);
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if (cc < 0) {
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if (errno != EINTR) {
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warn("recvmsg");
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sleep(1);
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}
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continue;
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} else if (cc == 0) {
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int mtu;
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/*
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* receive control messages only. Process the
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* exceptions (currently the only possibility is
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* a path MTU notification.)
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*/
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if ((mtu = get_pathmtu(&m)) > 0) {
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if ((options & F_VERBOSE) != 0) {
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printf("new path MTU (%d) is "
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"notified\n", mtu);
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}
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}
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continue;
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} else {
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/*
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* an ICMPv6 message (probably an echoreply)
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* arrived.
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*/
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pr_pack(packet, cc, &m);
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}
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continue;
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} else {
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/*
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* an ICMPv6 message (probably an echoreply) arrived.
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*/
|
||||
pr_pack(packet, cc, &m);
|
||||
if (((options & F_ONCE) != 0 && nreceived > 0) ||
|
||||
(npackets > 0 && nreceived >= npackets))
|
||||
break;
|
||||
}
|
||||
if (((options & F_ONCE) != 0 && nreceived > 0) ||
|
||||
(npackets > 0 && nreceived >= npackets))
|
||||
break;
|
||||
if (ntransmitted - nreceived - 1 > nmissedmax) {
|
||||
nmissedmax = ntransmitted - nreceived - 1;
|
||||
if (options & F_MISSED)
|
||||
(void)write(STDOUT_FILENO, &BBELL, 1);
|
||||
if (n == 0 || (options & F_FLOOD)) {
|
||||
if (npackets == 0 || ntransmitted < npackets)
|
||||
pinger();
|
||||
else {
|
||||
if (almost_done)
|
||||
break;
|
||||
almost_done = 1;
|
||||
/*
|
||||
* If we're not transmitting any more packets,
|
||||
* change the timer to wait two round-trip times
|
||||
* if we've received any packets or ten seconds
|
||||
* if we haven't.
|
||||
*/
|
||||
#define MAXWAIT 10
|
||||
intvl.tv_usec = 0;
|
||||
if (nreceived) {
|
||||
intvl.tv_sec = 2 * tmax / 1000;
|
||||
if (intvl.tv_sec == 0)
|
||||
intvl.tv_sec = 1;
|
||||
} else
|
||||
intvl.tv_sec = MAXWAIT;
|
||||
}
|
||||
gettimeofday(&last, NULL);
|
||||
if (ntransmitted - nreceived - 1 > nmissedmax) {
|
||||
nmissedmax = ntransmitted - nreceived - 1;
|
||||
if (options & F_MISSED)
|
||||
(void)write(STDOUT_FILENO, &BBELL, 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
sigemptyset(&si_sa.sa_mask);
|
||||
si_sa.sa_flags = 0;
|
||||
si_sa.sa_handler = SIG_IGN;
|
||||
sigaction(SIGINT, &si_sa, 0);
|
||||
summary();
|
||||
|
||||
if (res != NULL)
|
||||
@ -1203,11 +1189,6 @@ main(int argc, char *argv[])
|
||||
if(packet != NULL)
|
||||
free(packet);
|
||||
|
||||
#ifndef HAVE_POLL_H
|
||||
if(fdmaskp != NULL)
|
||||
free(fdmaskp);
|
||||
#endif
|
||||
|
||||
exit(nreceived == 0 ? 2 : 0);
|
||||
}
|
||||
|
||||
@ -1216,9 +1197,6 @@ onsignal(int sig)
|
||||
{
|
||||
|
||||
switch (sig) {
|
||||
case SIGALRM:
|
||||
seenalrm++;
|
||||
break;
|
||||
case SIGINT:
|
||||
seenint++;
|
||||
break;
|
||||
@ -1230,38 +1208,6 @@ onsignal(int sig)
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* retransmit --
|
||||
* This routine transmits another ping6.
|
||||
*/
|
||||
void
|
||||
retransmit(void)
|
||||
{
|
||||
struct itimerval itimer;
|
||||
|
||||
if (pinger() == 0)
|
||||
return;
|
||||
|
||||
/*
|
||||
* If we're not transmitting any more packets, change the timer
|
||||
* to wait two round-trip times if we've received any packets or
|
||||
* ten seconds if we haven't.
|
||||
*/
|
||||
#define MAXWAIT 10
|
||||
if (nreceived) {
|
||||
itimer.it_value.tv_sec = 2 * tmax / 1000;
|
||||
if (itimer.it_value.tv_sec == 0)
|
||||
itimer.it_value.tv_sec = 1;
|
||||
} else
|
||||
itimer.it_value.tv_sec = MAXWAIT;
|
||||
itimer.it_interval.tv_sec = 0;
|
||||
itimer.it_interval.tv_usec = 0;
|
||||
itimer.it_value.tv_usec = 0;
|
||||
|
||||
(void)signal(SIGALRM, onsignal);
|
||||
(void)setitimer(ITIMER_REAL, &itimer, NULL);
|
||||
}
|
||||
|
||||
/*
|
||||
* pinger --
|
||||
* Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
|
||||
@ -2241,24 +2187,12 @@ tvsub(struct timeval *out, struct timeval *in)
|
||||
void
|
||||
onint(int notused __unused)
|
||||
{
|
||||
summary();
|
||||
|
||||
if (res != NULL)
|
||||
freeaddrinfo(res);
|
||||
|
||||
if(packet != NULL)
|
||||
free(packet);
|
||||
|
||||
#ifndef HAVE_POLL_H
|
||||
if(fdmaskp != NULL)
|
||||
free(fdmaskp);
|
||||
#endif
|
||||
|
||||
(void)signal(SIGINT, SIG_DFL);
|
||||
(void)kill(getpid(), SIGINT);
|
||||
|
||||
/* NOTREACHED */
|
||||
exit(1);
|
||||
/*
|
||||
* When doing reverse DNS lookups, the seenint flag might not
|
||||
* be noticed for a while. Just exit if we get a second SIGINT.
|
||||
*/
|
||||
if ((options & F_HOSTNAME) && seenint != 0)
|
||||
_exit(nreceived ? 0 : 2);
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
Loading…
Reference in New Issue
Block a user