Initial import from ToT git.
Bug: 9469682
Change-Id: I6fc32550557dc5e94e9ecbbb57b0ec30a844adb4
Upstream: git://git.linux-ipv6.org/gitroot/iputils.git
Commit: 608419a7804caf36a359875d2fdae0b3eb181387
diff --git a/ping6.c b/ping6.c
new file mode 100644
index 0000000..c39864d
--- /dev/null
+++ b/ping6.c
@@ -0,0 +1,1861 @@
+/*
+ *
+ * Modified for AF_INET6 by Pedro Roque
+ *
+ * <roque@di.fc.ul.pt>
+ *
+ * Original copyright notice included bellow
+ */
+
+/*
+ * 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.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
+ All rights reserved.\n";
+#endif /* not lint */
+
+/*
+ * P I N G . C
+ *
+ * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
+ * measure round-trip-delays and packet loss across network paths.
+ *
+ * Author -
+ * Mike Muuss
+ * U. S. Army Ballistic Research Laboratory
+ * December, 1983
+ *
+ * Status -
+ * Public Domain. Distribution Unlimited.
+ * Bugs -
+ * More statistics could always be gathered.
+ * This program has to run SUID to ROOT to access the ICMP socket.
+ */
+#include "ping_common.h"
+
+#include <linux/filter.h>
+#include <netinet/ip6.h>
+#include <netinet/icmp6.h>
+#include <resolv.h>
+#ifndef WITHOUT_IFADDRS
+#include <ifaddrs.h>
+#endif
+
+#ifdef USE_IDN
+#include <stringprep.h>
+#endif
+
+#include "ping6_niquery.h"
+#include "in6_flowlabel.h"
+
+#ifndef SOL_IPV6
+#define SOL_IPV6 IPPROTO_IPV6
+#endif
+
+#ifndef SOL_ICMPV6
+#define SOL_ICMPV6 IPPROTO_ICMPV6
+#endif
+
+/* RFC3542 */
+#ifndef ICMP6_DST_UNREACH_BEYONDSCOPE
+#define ICMP6_DST_UNREACH_BEYONDSCOPE ICMP6_DST_UNREACH_NOTNEIGHBOR
+#endif
+
+#if defined(ENABLE_PING6_RTHDR) && !defined(ENABLE_PING6_RTHDR_RFC3542)
+#ifndef IPV6_SRCRT_TYPE_0
+#define IPV6_SRCRT_TYPE_0 0
+#endif
+#endif
+
+#ifndef MLD_LISTENER_QUERY
+#define MLD_LISTENER_QUERY 130
+#define MLD_LISTENER_REPORT 131
+#define MLD_LISTENER_REDUCTION 132
+#endif
+
+#define BIT_CLEAR(nr, addr) do { ((__u32 *)(addr))[(nr) >> 5] &= ~(1U << ((nr) & 31)); } while(0)
+#define BIT_SET(nr, addr) do { ((__u32 *)(addr))[(nr) >> 5] |= (1U << ((nr) & 31)); } while(0)
+#define BIT_TEST(nr, addr) do { (__u32 *)(addr))[(nr) >> 5] & (1U << ((nr) & 31)); } while(0)
+
+#ifndef ICMP6_FILTER_WILLPASS
+#define ICMP6_FILTER_WILLPASS(type, filterp) \
+ (BIT_TEST((type), filterp) == 0)
+
+#define ICMP6_FILTER_WILLBLOCK(type, filterp) \
+ BIT_TEST((type), filterp)
+
+#define ICMP6_FILTER_SETPASS(type, filterp) \
+ BIT_CLEAR((type), filterp)
+
+#define ICMP6_FILTER_SETBLOCK(type, filterp) \
+ BIT_SET((type), filterp)
+
+#define ICMP6_FILTER_SETPASSALL(filterp) \
+ memset(filterp, 0, sizeof(struct icmp6_filter));
+
+#define ICMP6_FILTER_SETBLOCKALL(filterp) \
+ memset(filterp, 0xFF, sizeof(struct icmp6_filter));
+#endif
+
+#define MAXPACKET 128000 /* max packet size */
+
+#ifdef SO_TIMESTAMP
+#define HAVE_SIN6_SCOPEID 1
+#endif
+
+#ifndef SCOPE_DELIMITER
+# define SCOPE_DELIMITER '%'
+#endif
+
+__u32 flowlabel;
+__u32 tclass;
+#ifdef ENABLE_PING6_RTHDR
+struct cmsghdr *srcrt;
+#endif
+
+struct sockaddr_in6 whereto; /* who to ping */
+u_char outpack[MAXPACKET];
+int maxpacket = sizeof(outpack);
+
+static unsigned char cmsgbuf[4096];
+static int cmsglen = 0;
+
+static char * pr_addr(struct in6_addr *addr);
+static char * pr_addr_n(struct in6_addr *addr);
+static int pr_icmph(__u8 type, __u8 code, __u32 info);
+static void usage(void) __attribute((noreturn));
+
+struct sockaddr_in6 source;
+char *device;
+int pmtudisc=-1;
+
+static int icmp_sock;
+
+#ifdef USE_GNUTLS
+# include <gnutls/openssl.h>
+#else
+# include <openssl/md5.h>
+#endif
+
+/* Node Information query */
+int ni_query = -1;
+int ni_flag = 0;
+void *ni_subject = NULL;
+int ni_subject_len = 0;
+int ni_subject_type = -1;
+char *ni_group;
+
+static inline int ntohsp(__u16 *p)
+{
+ __u16 v;
+ memcpy(&v, p, sizeof(v));
+ return ntohs(v);
+}
+
+#if defined(ENABLE_PING6_RTHDR) && !defined(ENABLE_PING6_RTHDR_RFC3542)
+size_t inet6_srcrt_space(int type, int segments)
+{
+ if (type != 0 || segments > 24)
+ return 0;
+
+ return (sizeof(struct cmsghdr) + sizeof(struct ip6_rthdr0) +
+ segments * sizeof(struct in6_addr));
+}
+
+extern struct cmsghdr * inet6_srcrt_init(void *bp, int type)
+{
+ struct cmsghdr *cmsg;
+
+ if (type)
+ return NULL;
+
+ memset(bp, 0, sizeof(struct cmsghdr) + sizeof(struct ip6_rthdr0));
+ cmsg = (struct cmsghdr *) bp;
+
+ cmsg->cmsg_len = sizeof(struct cmsghdr) + sizeof(struct ip6_rthdr0);
+ cmsg->cmsg_level = SOL_IPV6;
+ cmsg->cmsg_type = IPV6_RTHDR;
+
+ return cmsg;
+}
+
+int inet6_srcrt_add(struct cmsghdr *cmsg, const struct in6_addr *addr)
+{
+ struct ip6_rthdr0 *hdr;
+
+ hdr = (struct ip6_rthdr0 *) CMSG_DATA(cmsg);
+
+ cmsg->cmsg_len += sizeof(struct in6_addr);
+ hdr->ip6r0_len += sizeof(struct in6_addr) / 8;
+
+ memcpy(&hdr->ip6r0_addr[hdr->ip6r0_segleft++], addr,
+ sizeof(struct in6_addr));
+
+ return 0;
+}
+#endif
+
+unsigned int if_name2index(const char *ifname)
+{
+ unsigned int i = if_nametoindex(ifname);
+ if (!i) {
+ fprintf(stderr, "ping: unknown iface %s\n", ifname);
+ exit(2);
+ }
+ return i;
+}
+
+struct niquery_option {
+ char *name;
+ int namelen;
+ int has_arg;
+ int data;
+ int (*handler)(int index, const char *arg);
+};
+
+#define NIQUERY_OPTION(_name, _has_arg, _data, _handler) \
+ { \
+ .name = _name, \
+ .namelen = sizeof(_name) - 1, \
+ .has_arg = _has_arg, \
+ .data = _data, \
+ .handler = _handler \
+ }
+
+static int niquery_option_name_handler(int index, const char *arg);
+static int niquery_option_ipv6_handler(int index, const char *arg);
+static int niquery_option_ipv6_flag_handler(int index, const char *arg);
+static int niquery_option_ipv4_handler(int index, const char *arg);
+static int niquery_option_ipv4_flag_handler(int index, const char *arg);
+static int niquery_option_subject_addr_handler(int index, const char *arg);
+static int niquery_option_subject_name_handler(int index, const char *arg);
+static int niquery_option_help_handler(int index, const char *arg);
+
+struct niquery_option niquery_options[] = {
+ NIQUERY_OPTION("name", 0, 0, niquery_option_name_handler),
+ NIQUERY_OPTION("fqdn", 0, 0, niquery_option_name_handler),
+ NIQUERY_OPTION("ipv6", 0, 0, niquery_option_ipv6_handler),
+ NIQUERY_OPTION("ipv6-all", 0, NI_IPV6ADDR_F_ALL, niquery_option_ipv6_flag_handler),
+ NIQUERY_OPTION("ipv6-compatible", 0, NI_IPV6ADDR_F_COMPAT, niquery_option_ipv6_flag_handler),
+ NIQUERY_OPTION("ipv6-linklocal", 0, NI_IPV6ADDR_F_LINKLOCAL, niquery_option_ipv6_flag_handler),
+ NIQUERY_OPTION("ipv6-sitelocal", 0, NI_IPV6ADDR_F_SITELOCAL, niquery_option_ipv6_flag_handler),
+ NIQUERY_OPTION("ipv6-global", 0, NI_IPV6ADDR_F_GLOBAL, niquery_option_ipv6_flag_handler),
+ NIQUERY_OPTION("ipv4", 0, 0, niquery_option_ipv4_handler),
+ NIQUERY_OPTION("ipv4-all", 0, NI_IPV4ADDR_F_ALL, niquery_option_ipv4_flag_handler),
+ NIQUERY_OPTION("subject-ipv6", 1, NI_SUBJ_IPV6, niquery_option_subject_addr_handler),
+ NIQUERY_OPTION("subject-ipv4", 1, NI_SUBJ_IPV4, niquery_option_subject_addr_handler),
+ NIQUERY_OPTION("subject-name", 1, 0, niquery_option_subject_name_handler),
+ NIQUERY_OPTION("subject-fqdn", 1, -1, niquery_option_subject_name_handler),
+ NIQUERY_OPTION("help", 0, 0, niquery_option_help_handler),
+ {},
+};
+
+static inline int niquery_is_enabled(void)
+{
+ return ni_query >= 0;
+}
+
+#if PING6_NONCE_MEMORY
+__u8 *ni_nonce_ptr;
+#else
+struct {
+ struct timeval tv;
+ pid_t pid;
+} ni_nonce_secret;
+#endif
+
+static void niquery_init_nonce(void)
+{
+#if PING6_NONCE_MEMORY
+ struct timeval tv;
+ unsigned long seed;
+
+ seed = (unsigned long)getpid();
+ if (!gettimeofday(&tv, NULL))
+ seed ^= tv.tv_usec;
+ srand(seed);
+
+ ni_nonce_ptr = calloc(NI_NONCE_SIZE, MAX_DUP_CHK);
+ if (!ni_nonce_ptr) {
+ perror("ping6: calloc");
+ exit(2);
+ }
+
+ ni_nonce_ptr[0] = ~0;
+#else
+ gettimeofday(&ni_nonce_secret.tv, NULL);
+ ni_nonce_secret.pid = getpid();
+#endif
+}
+
+#if !PING6_NONCE_MEMORY
+static int niquery_nonce(__u8 *nonce, int fill)
+{
+ static __u8 digest[MD5_DIGEST_LENGTH];
+ static int seq = -1;
+
+ if (fill || seq != *(__u16 *)nonce || seq < 0) {
+ MD5_CTX ctxt;
+
+ MD5_Init(&ctxt);
+ MD5_Update(&ctxt, &ni_nonce_secret, sizeof(ni_nonce_secret));
+ MD5_Update(&ctxt, nonce, sizeof(__u16));
+ MD5_Final(digest, &ctxt);
+
+ seq = *(__u16 *)nonce;
+ }
+
+ if (fill) {
+ memcpy(nonce + sizeof(__u16), digest, NI_NONCE_SIZE - sizeof(__u16));
+ return 0;
+ } else {
+ if (memcmp(nonce + sizeof(__u16), digest, NI_NONCE_SIZE - sizeof(__u16)))
+ return -1;
+ return ntohsp((__u16 *)nonce);
+ }
+}
+#endif
+
+static inline void niquery_fill_nonce(__u16 seq, __u8 *nonce)
+{
+ __u16 v = htons(seq);
+#if PING6_NONCE_MEMORY
+ int i;
+
+ memcpy(&ni_nonce_ptr[NI_NONCE_SIZE * (seq % MAX_DUP_CHK)], &v, sizeof(v));
+
+ for (i = sizeof(v); i < NI_NONCE_SIZE; i++)
+ ni_nonce_ptr[NI_NONCE_SIZE * (seq % MAX_DUP_CHK) + i] = 0x100 * (rand() / (RAND_MAX + 1.0));
+
+ memcpy(nonce, &ni_nonce_ptr[NI_NONCE_SIZE * (seq % MAX_DUP_CHK)], NI_NONCE_SIZE);
+#else
+ memcpy(nonce, &v, sizeof(v));
+ niquery_nonce(nonce, 1);
+#endif
+}
+
+static inline int niquery_check_nonce(__u8 *nonce)
+{
+#if PING6_NONCE_MEMORY
+ __u16 seq = ntohsp((__u16 *)nonce);
+ if (memcmp(nonce, &ni_nonce_ptr[NI_NONCE_SIZE * (seq % MAX_DUP_CHK)], NI_NONCE_SIZE))
+ return -1;
+ return seq;
+#else
+ return niquery_nonce(nonce, 0);
+#endif
+}
+
+static int niquery_set_qtype(int type)
+{
+ if (niquery_is_enabled() && ni_query != type) {
+ printf("Qtype conflict\n");
+ return -1;
+ }
+ ni_query = type;
+ return 0;
+}
+
+static int niquery_option_name_handler(int index, const char *arg)
+{
+ if (niquery_set_qtype(NI_QTYPE_NAME) < 0)
+ return -1;
+ return 0;
+}
+
+static int niquery_option_ipv6_handler(int index, const char *arg)
+{
+ if (niquery_set_qtype(NI_QTYPE_IPV6ADDR) < 0)
+ return -1;
+ return 0;
+}
+
+static int niquery_option_ipv6_flag_handler(int index, const char *arg)
+{
+ if (niquery_set_qtype(NI_QTYPE_IPV6ADDR) < 0)
+ return -1;
+ ni_flag |= niquery_options[index].data;
+ return 0;
+}
+
+static int niquery_option_ipv4_handler(int index, const char *arg)
+{
+ if (niquery_set_qtype(NI_QTYPE_IPV4ADDR) < 0)
+ return -1;
+ return 0;
+}
+
+static int niquery_option_ipv4_flag_handler(int index, const char *arg)
+{
+ if (niquery_set_qtype(NI_QTYPE_IPV4ADDR) < 0)
+ return -1;
+ ni_flag |= niquery_options[index].data;
+ return 0;
+}
+
+static inline int niquery_is_subject_valid(void)
+{
+ return ni_subject_type >= 0 && ni_subject;
+}
+
+static int niquery_set_subject_type(int type)
+{
+ if (niquery_is_subject_valid() && ni_subject_type != type) {
+ printf("Subject type conflict\n");
+ return -1;
+ }
+ ni_subject_type = type;
+ return 0;
+}
+
+#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
+#define OFFSET_OF(type,elem) ((size_t)&((type *)0)->elem)
+
+static int niquery_option_subject_addr_handler(int index, const char *arg)
+{
+ struct addrinfo hints, *ai0, *ai;
+ int offset;
+ int gai;
+
+ if (niquery_set_subject_type(niquery_options[index].data) < 0)
+ return -1;
+
+ ni_subject_type = niquery_options[index].data;
+
+ memset(&hints, 0, sizeof(hints));
+
+ switch (niquery_options[index].data) {
+ case NI_SUBJ_IPV6:
+ ni_subject_len = sizeof(struct in6_addr);
+ offset = OFFSET_OF(struct sockaddr_in6, sin6_addr);
+ hints.ai_family = AF_INET6;
+ break;
+ case NI_SUBJ_IPV4:
+ ni_subject_len = sizeof(struct in_addr);
+ offset = OFFSET_OF(struct sockaddr_in, sin_addr);
+ hints.ai_family = AF_INET;
+ break;
+ default:
+ /* should not happen. */
+ offset = -1;
+ }
+
+ hints.ai_socktype = SOCK_DGRAM;
+#ifdef USE_IDN
+ hints.ai_flags = AI_IDN;
+#endif
+
+ gai = getaddrinfo(arg, 0, &hints, &ai0);
+ if (gai) {
+ fprintf(stderr, "Unknown host: %s\n", arg);
+ return -1;
+ }
+
+ for (ai = ai0; ai; ai = ai->ai_next) {
+ void *p = malloc(ni_subject_len);
+ if (!p)
+ continue;
+ memcpy(p, (__u8 *)ai->ai_addr + offset, ni_subject_len);
+ free(ni_subject);
+ ni_subject = p;
+ break;
+ }
+ freeaddrinfo(ai0);
+
+ return 0;
+}
+
+static int niquery_option_subject_name_handler(int index, const char *arg)
+{
+ static char nigroup_buf[INET6_ADDRSTRLEN + 1 + IFNAMSIZ];
+ unsigned char *dnptrs[2], **dpp, **lastdnptr;
+ int n;
+ int i;
+ char *name, *p;
+ char *canonname = NULL, *idn = NULL;
+ unsigned char *buf = NULL;
+ size_t namelen;
+ size_t buflen;
+ int dots, fqdn = niquery_options[index].data;
+ MD5_CTX ctxt;
+ __u8 digest[MD5_DIGEST_LENGTH];
+#ifdef USE_IDN
+ int rc;
+#endif
+
+ if (niquery_set_subject_type(NI_SUBJ_NAME) < 0)
+ return -1;
+
+#ifdef USE_IDN
+ name = stringprep_locale_to_utf8(arg);
+ if (!name) {
+ fprintf(stderr, "ping6: IDN support failed.\n");
+ exit(2);
+ }
+#else
+ name = strdup(arg);
+ if (!name)
+ goto oomexit;
+#endif
+
+ p = strchr(name, SCOPE_DELIMITER);
+ if (p) {
+ *p = '\0';
+ if (strlen(p + 1) >= IFNAMSIZ) {
+ fprintf(stderr, "ping6: too long scope name.\n");
+ exit(1);
+ }
+ }
+
+#ifdef USE_IDN
+ rc = idna_to_ascii_8z(name, &idn, 0);
+ if (rc) {
+ fprintf(stderr, "ping6: IDN encoding error: %s\n",
+ idna_strerror(rc));
+ exit(2);
+ }
+#else
+ idn = strdup(name);
+ if (!idn)
+ goto oomexit;
+#endif
+
+ namelen = strlen(idn);
+ canonname = malloc(namelen + 1);
+ if (!canonname)
+ goto oomexit;
+
+ dots = 0;
+ for (i = 0; i < namelen + 1; i++) {
+ canonname[i] = isupper(idn[i]) ? tolower(idn[i]) : idn[i];
+ if (idn[i] == '.')
+ dots++;
+ }
+
+ if (fqdn == 0) {
+ /* guess if hostname is FQDN */
+ fqdn = dots ? 1 : -1;
+ }
+
+ buflen = namelen + 3 + 1; /* dn_comp() requrires strlen() + 3,
+ plus non-fqdn indicator. */
+ buf = malloc(buflen);
+ if (!buf) {
+ fprintf(stderr, "ping6: out of memory.\n");
+ goto errexit;
+ }
+
+ dpp = dnptrs;
+ lastdnptr = &dnptrs[ARRAY_SIZE(dnptrs)];
+
+ *dpp++ = (unsigned char *)buf;
+ *dpp++ = NULL;
+
+ n = dn_comp(canonname, (unsigned char *)buf, buflen, dnptrs, lastdnptr);
+ if (n < 0) {
+ fprintf(stderr, "ping6: Inappropriate subject name: %s\n", canonname);
+ goto errexit;
+ } else if (n >= buflen) {
+ fprintf(stderr, "ping6: dn_comp() returned too long result.\n");
+ goto errexit;
+ }
+
+ MD5_Init(&ctxt);
+ MD5_Update(&ctxt, buf, buf[0]);
+ MD5_Final(digest, &ctxt);
+
+ sprintf(nigroup_buf, "ff02::2:%02x%02x:%02x%02x%s%s",
+ digest[0], digest[1], digest[2], digest[3],
+ p ? "%" : "",
+ p ? p + 1 : "");
+
+ if (fqdn < 0)
+ buf[n] = 0;
+
+ free(ni_subject);
+
+ ni_group = nigroup_buf;
+ ni_subject = buf;
+ ni_subject_len = n + (fqdn < 0);
+ ni_group = nigroup_buf;
+
+ free(canonname);
+ free(idn);
+ free(name);
+
+ return 0;
+oomexit:
+ fprintf(stderr, "ping6: out of memory.\n");
+errexit:
+ free(buf);
+ free(canonname);
+ free(idn);
+ free(name);
+ exit(1);
+}
+
+int niquery_option_help_handler(int index, const char *arg)
+{
+ fprintf(stderr, "ping6 -N suboptions\n"
+ "\tHelp:\n"
+ "\t\thelp\n"
+ "\tQuery:\n"
+ "\t\tname,\n"
+ "\t\tipv6,ipv6-all,ipv6-compatible,ipv6-linklocal,ipv6-sitelocal,ipv6-global,\n"
+ "\t\tipv4,ipv4-all,\n"
+ "\tSubject:\n"
+ "\t\tsubject-ipv6=addr,subject-ipv4=addr,subject-name=name,subject-fqdn=name,\n"
+ );
+ exit(2);
+}
+
+int niquery_option_handler(const char *opt_arg)
+{
+ struct niquery_option *p;
+ int i;
+ int ret = -1;
+ for (i = 0, p = niquery_options; p->name; i++, p++) {
+ if (strncmp(p->name, opt_arg, p->namelen))
+ continue;
+ if (!p->has_arg) {
+ if (opt_arg[p->namelen] == '\0') {
+ ret = p->handler(i, NULL);
+ if (ret >= 0)
+ break;
+ }
+ } else {
+ if (opt_arg[p->namelen] == '=') {
+ ret = p->handler(i, &opt_arg[p->namelen] + 1);
+ if (ret >= 0)
+ break;
+ }
+ }
+ }
+ if (!p->name)
+ ret = niquery_option_help_handler(0, NULL);
+ return ret;
+}
+
+static int hextoui(const char *str)
+{
+ unsigned long val;
+ char *ep;
+
+ errno = 0;
+ val = strtoul(str, &ep, 16);
+ if (*ep) {
+ if (!errno)
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (val > UINT_MAX) {
+ errno = ERANGE;
+ return UINT_MAX;
+ }
+
+ return val;
+}
+
+int main(int argc, char *argv[])
+{
+ int ch, hold, packlen;
+ u_char *packet;
+ char *target;
+ struct addrinfo hints, *ai;
+ int gai;
+ struct sockaddr_in6 firsthop;
+ int socket_errno;
+ struct icmp6_filter filter;
+ int err;
+#ifdef __linux__
+ int csum_offset, sz_opt;
+#endif
+ static uint32_t scope_id = 0;
+
+ limit_capabilities();
+
+#ifdef USE_IDN
+ setlocale(LC_ALL, "");
+#endif
+
+ enable_capability_raw();
+
+ icmp_sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
+ socket_errno = errno;
+
+ disable_capability_raw();
+
+ source.sin6_family = AF_INET6;
+ memset(&firsthop, 0, sizeof(firsthop));
+ firsthop.sin6_family = AF_INET6;
+
+ preload = 1;
+ while ((ch = getopt(argc, argv, COMMON_OPTSTR "F:N:")) != EOF) {
+ switch(ch) {
+ case 'F':
+ flowlabel = hextoui(optarg);
+ if (errno || (flowlabel & ~IPV6_FLOWINFO_FLOWLABEL)) {
+ fprintf(stderr, "ping: Invalid flowinfo %s\n", optarg);
+ exit(2);
+ }
+ options |= F_FLOWINFO;
+ break;
+ case 'Q':
+ tclass = hextoui(optarg);
+ if (errno || (tclass & ~0xff)) {
+ fprintf(stderr, "ping: Invalid tclass %s\n", optarg);
+ exit(2);
+ }
+ options |= F_TCLASS;
+ break;
+ case 'I':
+ if (strchr(optarg, ':')) {
+ char *p, *addr = strdup(optarg);
+
+ if (!addr) {
+ fprintf(stderr, "ping: out of memory\n");
+ exit(2);
+ }
+
+ p = strchr(addr, SCOPE_DELIMITER);
+ if (p) {
+ *p = '\0';
+ device = optarg + (p - addr) + 1;
+ }
+
+ if (inet_pton(AF_INET6, addr, (char*)&source.sin6_addr) <= 0) {
+ fprintf(stderr, "ping: invalid source address %s\n", optarg);
+ exit(2);
+ }
+
+ options |= F_STRICTSOURCE;
+
+ free(addr);
+ } else {
+ device = optarg;
+ }
+ break;
+ case 'M':
+ if (strcmp(optarg, "do") == 0)
+ pmtudisc = IPV6_PMTUDISC_DO;
+ else if (strcmp(optarg, "dont") == 0)
+ pmtudisc = IPV6_PMTUDISC_DONT;
+ else if (strcmp(optarg, "want") == 0)
+ pmtudisc = IPV6_PMTUDISC_WANT;
+ else {
+ fprintf(stderr, "ping: wrong value for -M: do, dont, want are valid ones.\n");
+ exit(2);
+ }
+ break;
+ case 'V':
+ printf("ping6 utility, iputils-%s\n", SNAPSHOT);
+ exit(0);
+ case 'N':
+ if (niquery_option_handler(optarg) < 0) {
+ usage();
+ break;
+ }
+ break;
+ COMMON_OPTIONS
+ common_options(ch);
+ break;
+ default:
+ usage();
+ }
+ }
+ argc -= optind;
+ argv += optind;
+
+#ifdef ENABLE_PING6_RTHDR
+ while (argc > 1) {
+ struct in6_addr *addr;
+
+ if (srcrt == NULL) {
+ int space;
+
+ fprintf(stderr, "ping6: Warning: "
+ "Source routing is deprecated by RFC5095.\n");
+
+#ifdef ENABLE_PING6_RTHDR_RFC3542
+ space = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
+#else
+ space = inet6_srcrt_space(IPV6_SRCRT_TYPE_0, argc - 1);
+#endif
+ if (space == 0) {
+ fprintf(stderr, "srcrt_space failed\n");
+ exit(2);
+ }
+#ifdef ENABLE_PING6_RTHDR_RFC3542
+ if (cmsglen + CMSG_SPACE(space) > sizeof(cmsgbuf)) {
+ fprintf(stderr, "no room for options\n");
+ exit(2);
+ }
+#else
+ if (space + cmsglen > sizeof(cmsgbuf)) {
+ fprintf(stderr, "no room for options\n");
+ exit(2);
+ }
+#endif
+ srcrt = (struct cmsghdr*)(cmsgbuf+cmsglen);
+#ifdef ENABLE_PING6_RTHDR_RFC3542
+ memset(srcrt, 0, CMSG_SPACE(0));
+ srcrt->cmsg_len = CMSG_LEN(space);
+ srcrt->cmsg_level = IPPROTO_IPV6;
+ srcrt->cmsg_type = IPV6_RTHDR;
+ inet6_rth_init(CMSG_DATA(srcrt), space, IPV6_RTHDR_TYPE_0, argc - 1);
+ cmsglen += CMSG_SPACE(space);
+#else
+ cmsglen += CMSG_ALIGN(space);
+ inet6_srcrt_init(srcrt, IPV6_SRCRT_TYPE_0);
+#endif
+ }
+
+ target = *argv;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_INET6;
+#ifdef USE_IDN
+ hints.ai_flags = AI_IDN;
+#endif
+ gai = getaddrinfo(target, NULL, &hints, &ai);
+ if (gai) {
+ fprintf(stderr, "unknown host\n");
+ exit(2);
+ }
+ addr = &((struct sockaddr_in6 *)(ai->ai_addr))->sin6_addr;
+#ifdef ENABLE_PING6_RTHDR_RFC3542
+ inet6_rth_add(CMSG_DATA(srcrt), addr);
+#else
+ inet6_srcrt_add(srcrt, addr);
+#endif
+ if (IN6_IS_ADDR_UNSPECIFIED(&firsthop.sin6_addr)) {
+ memcpy(&firsthop.sin6_addr, addr, 16);
+#ifdef HAVE_SIN6_SCOPEID
+ firsthop.sin6_scope_id = ((struct sockaddr_in6 *)(ai->ai_addr))->sin6_scope_id;
+ /* Verify scope_id is the same as previous nodes */
+ if (firsthop.sin6_scope_id && scope_id && firsthop.sin6_scope_id != scope_id) {
+ fprintf(stderr, "scope discrepancy among the nodes\n");
+ exit(2);
+ } else if (!scope_id) {
+ scope_id = firsthop.sin6_scope_id;
+ }
+#endif
+ }
+ freeaddrinfo(ai);
+
+ argv++;
+ argc--;
+ }
+#endif
+
+ if (niquery_is_enabled()) {
+ niquery_init_nonce();
+
+ if (!niquery_is_subject_valid()) {
+ ni_subject = &whereto.sin6_addr;
+ ni_subject_len = sizeof(whereto.sin6_addr);
+ ni_subject_type = NI_SUBJ_IPV6;
+ }
+ }
+
+ if (argc > 1) {
+#ifndef ENABLE_PING6_RTHDR
+ fprintf(stderr, "ping6: Source routing is deprecated by RFC5095.\n");
+#endif
+ usage();
+ } else if (argc == 1) {
+ target = *argv;
+ } else {
+ if (ni_query < 0 && ni_subject_type != NI_SUBJ_NAME)
+ usage();
+ target = ni_group;
+ }
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_INET6;
+#ifdef USE_IDN
+ hints.ai_flags = AI_IDN;
+#endif
+ gai = getaddrinfo(target, NULL, &hints, &ai);
+ if (gai) {
+ fprintf(stderr, "unknown host\n");
+ exit(2);
+ }
+
+ memcpy(&whereto, ai->ai_addr, sizeof(whereto));
+ whereto.sin6_port = htons(IPPROTO_ICMPV6);
+
+ if (memchr(target, ':', strlen(target)))
+ options |= F_NUMERIC;
+
+ freeaddrinfo(ai);
+
+ if (IN6_IS_ADDR_UNSPECIFIED(&firsthop.sin6_addr)) {
+ memcpy(&firsthop.sin6_addr, &whereto.sin6_addr, 16);
+#ifdef HAVE_SIN6_SCOPEID
+ firsthop.sin6_scope_id = whereto.sin6_scope_id;
+ /* Verify scope_id is the same as intermediate nodes */
+ if (firsthop.sin6_scope_id && scope_id && firsthop.sin6_scope_id != scope_id) {
+ fprintf(stderr, "scope discrepancy among the nodes\n");
+ exit(2);
+ } else if (!scope_id) {
+ scope_id = firsthop.sin6_scope_id;
+ }
+#endif
+ }
+
+ hostname = target;
+
+ if (IN6_IS_ADDR_UNSPECIFIED(&source.sin6_addr)) {
+ socklen_t alen;
+ int probe_fd = socket(AF_INET6, SOCK_DGRAM, 0);
+
+ if (probe_fd < 0) {
+ perror("socket");
+ exit(2);
+ }
+ if (device) {
+#if defined(IPV6_RECVPKTINFO) || defined(HAVE_SIN6_SCOPEID)
+ unsigned int iface = if_name2index(device);
+#endif
+#ifdef IPV6_RECVPKTINFO
+ struct in6_pktinfo ipi;
+
+ memset(&ipi, 0, sizeof(ipi));
+ ipi.ipi6_ifindex = iface;
+#endif
+
+#ifdef HAVE_SIN6_SCOPEID
+ if (IN6_IS_ADDR_LINKLOCAL(&firsthop.sin6_addr) ||
+ IN6_IS_ADDR_MC_LINKLOCAL(&firsthop.sin6_addr))
+ firsthop.sin6_scope_id = iface;
+#endif
+ enable_capability_raw();
+ if (
+#ifdef IPV6_RECVPKTINFO
+ setsockopt(probe_fd, IPPROTO_IPV6, IPV6_PKTINFO, &ipi, sizeof(ipi)) == -1 &&
+#endif
+ setsockopt(probe_fd, SOL_SOCKET, SO_BINDTODEVICE, device, strlen(device)+1) == -1) {
+ perror("setsockopt(SO_BINDTODEVICE)");
+ exit(2);
+ }
+ disable_capability_raw();
+ }
+ firsthop.sin6_port = htons(1025);
+ if (connect(probe_fd, (struct sockaddr*)&firsthop, sizeof(firsthop)) == -1) {
+ perror("connect");
+ exit(2);
+ }
+ alen = sizeof(source);
+ if (getsockname(probe_fd, (struct sockaddr*)&source, &alen) == -1) {
+ perror("getsockname");
+ exit(2);
+ }
+ source.sin6_port = 0;
+ close(probe_fd);
+
+#ifndef WITHOUT_IFADDRS
+ if (device) {
+ struct ifaddrs *ifa0, *ifa;
+
+ if (getifaddrs(&ifa0)) {
+ perror("getifaddrs");
+ exit(2);
+ }
+
+ for (ifa = ifa0; ifa; ifa = ifa->ifa_next) {
+ if (!ifa->ifa_addr || ifa->ifa_addr->sa_family != AF_INET6)
+ continue;
+ if (!strncmp(ifa->ifa_name, device, sizeof(device) - 1) &&
+ IN6_ARE_ADDR_EQUAL(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr,
+ &source.sin6_addr))
+ break;
+ }
+ if (!ifa)
+ fprintf(stderr, "ping6: Warning: source address might be selected on device other than %s.\n", device);
+
+ freeifaddrs(ifa0);
+ }
+#endif
+ }
+#ifdef HAVE_SIN6_SCOPEID
+ else if (device && (IN6_IS_ADDR_LINKLOCAL(&source.sin6_addr) ||
+ IN6_IS_ADDR_MC_LINKLOCAL(&source.sin6_addr)))
+ source.sin6_scope_id = if_name2index(device);
+#endif
+
+ if (icmp_sock < 0) {
+ errno = socket_errno;
+ perror("ping: icmp open socket");
+ exit(2);
+ }
+
+ if (device) {
+ struct cmsghdr *cmsg;
+ struct in6_pktinfo *ipi;
+
+ cmsg = (struct cmsghdr*)(cmsgbuf+cmsglen);
+ cmsglen += CMSG_SPACE(sizeof(*ipi));
+ cmsg->cmsg_len = CMSG_LEN(sizeof(*ipi));
+ cmsg->cmsg_level = SOL_IPV6;
+ cmsg->cmsg_type = IPV6_PKTINFO;
+
+ ipi = (struct in6_pktinfo*)CMSG_DATA(cmsg);
+ memset(ipi, 0, sizeof(*ipi));
+ ipi->ipi6_ifindex = if_name2index(device);
+ }
+
+ if ((whereto.sin6_addr.s6_addr16[0]&htons(0xff00)) == htons (0xff00)) {
+ if (uid) {
+ if (interval < 1000) {
+ fprintf(stderr, "ping: multicast ping with too short interval.\n");
+ exit(2);
+ }
+ if (pmtudisc >= 0 && pmtudisc != IPV6_PMTUDISC_DO) {
+ fprintf(stderr, "ping: multicast ping does not fragment.\n");
+ exit(2);
+ }
+ }
+ if (pmtudisc < 0)
+ pmtudisc = IPV6_PMTUDISC_DO;
+ }
+
+ if (pmtudisc >= 0) {
+ if (setsockopt(icmp_sock, SOL_IPV6, IPV6_MTU_DISCOVER, &pmtudisc, sizeof(pmtudisc)) == -1) {
+ perror("ping: IPV6_MTU_DISCOVER");
+ exit(2);
+ }
+ }
+
+ if ((options&F_STRICTSOURCE) &&
+ bind(icmp_sock, (struct sockaddr*)&source, sizeof(source)) == -1) {
+ perror("ping: bind icmp socket");
+ exit(2);
+ }
+
+ if (datalen >= sizeof(struct timeval) && (ni_query < 0)) {
+ /* can we time transfer */
+ timing = 1;
+ }
+ packlen = datalen + 8 + 4096 + 40 + 8; /* 4096 for rthdr */
+ if (!(packet = (u_char *)malloc((u_int)packlen))) {
+ fprintf(stderr, "ping: out of memory.\n");
+ exit(2);
+ }
+
+ working_recverr = 1;
+ hold = 1;
+ if (setsockopt(icmp_sock, SOL_IPV6, IPV6_RECVERR, (char *)&hold, sizeof(hold))) {
+ fprintf(stderr, "WARNING: your kernel is veeery old. No problems.\n");
+ working_recverr = 0;
+ }
+
+ /* Estimate memory eaten by single packet. It is rough estimate.
+ * Actually, for small datalen's it depends on kernel side a lot. */
+ hold = datalen+8;
+ hold += ((hold+511)/512)*(40+16+64+160);
+ sock_setbufs(icmp_sock, hold);
+
+#ifdef __linux__
+ csum_offset = 2;
+ sz_opt = sizeof(int);
+
+ err = setsockopt(icmp_sock, SOL_RAW, IPV6_CHECKSUM, &csum_offset, sz_opt);
+ if (err < 0) {
+ /* checksum should be enabled by default and setting this
+ * option might fail anyway.
+ */
+ fprintf(stderr, "setsockopt(RAW_CHECKSUM) failed - try to continue.");
+ }
+#endif
+
+ /*
+ * select icmp echo reply as icmp type to receive
+ */
+
+ ICMP6_FILTER_SETBLOCKALL(&filter);
+
+ if (!working_recverr) {
+ ICMP6_FILTER_SETPASS(ICMP6_DST_UNREACH, &filter);
+ ICMP6_FILTER_SETPASS(ICMP6_PACKET_TOO_BIG, &filter);
+ ICMP6_FILTER_SETPASS(ICMP6_TIME_EXCEEDED, &filter);
+ ICMP6_FILTER_SETPASS(ICMP6_PARAM_PROB, &filter);
+ }
+
+ if (niquery_is_enabled())
+ ICMP6_FILTER_SETPASS(ICMPV6_NI_REPLY, &filter);
+ else
+ ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filter);
+
+ err = setsockopt(icmp_sock, IPPROTO_ICMPV6, ICMP6_FILTER, &filter,
+ sizeof(struct icmp6_filter));
+
+ if (err < 0) {
+ perror("setsockopt(ICMP6_FILTER)");
+ exit(2);
+ }
+
+ if (options & F_NOLOOP) {
+ int loop = 0;
+ if (setsockopt(icmp_sock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
+ &loop, sizeof(loop)) == -1) {
+ perror ("can't disable multicast loopback");
+ exit(2);
+ }
+ }
+ if (options & F_TTL) {
+ if (setsockopt(icmp_sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
+ &ttl, sizeof(ttl)) == -1) {
+ perror ("can't set multicast hop limit");
+ exit(2);
+ }
+ if (setsockopt(icmp_sock, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
+ &ttl, sizeof(ttl)) == -1) {
+ perror ("can't set unicast hop limit");
+ exit(2);
+ }
+ }
+
+ if (1) {
+ int on = 1;
+ if (
+#ifdef IPV6_RECVHOPLIMIT
+ setsockopt(icmp_sock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
+ &on, sizeof(on)) == -1 &&
+ setsockopt(icmp_sock, IPPROTO_IPV6, IPV6_2292HOPLIMIT,
+ &on, sizeof(on)) == -1
+#else
+ setsockopt(icmp_sock, IPPROTO_IPV6, IPV6_HOPLIMIT,
+ &on, sizeof(on)) == -1
+#endif
+ ){
+ perror ("can't receive hop limit");
+ exit(2);
+ }
+ }
+
+ if (options & F_TCLASS) {
+#ifdef IPV6_TCLASS
+ if (setsockopt(icmp_sock, IPPROTO_IPV6, IPV6_TCLASS,
+ &tclass, sizeof(tclass)) == -1) {
+ perror ("setsockopt(IPV6_TCLASS)");
+ exit(2);
+ }
+#else
+ fprintf(stderr, "Traffic class is not supported.\n");
+#endif
+ }
+
+ if (options&F_FLOWINFO) {
+#ifdef IPV6_FLOWINFO_SEND
+ int on = 1;
+#endif
+#ifdef IPV6_FLOWLABEL_MGR
+ char freq_buf[CMSG_ALIGN(sizeof(struct in6_flowlabel_req)) + cmsglen];
+ struct in6_flowlabel_req *freq = (struct in6_flowlabel_req *)freq_buf;
+ int freq_len = sizeof(*freq);
+#ifdef ENABLE_PING6_RTHDR
+ if (srcrt)
+ freq_len = CMSG_ALIGN(sizeof(*freq)) + srcrt->cmsg_len;
+#endif
+ memset(freq, 0, sizeof(*freq));
+ freq->flr_label = htonl(flowlabel & IPV6_FLOWINFO_FLOWLABEL);
+ freq->flr_action = IPV6_FL_A_GET;
+ freq->flr_flags = IPV6_FL_F_CREATE;
+ freq->flr_share = IPV6_FL_S_EXCL;
+ memcpy(&freq->flr_dst, &whereto.sin6_addr, 16);
+#ifdef ENABLE_PING6_RTHDR
+ if (srcrt)
+ memcpy(freq_buf + CMSG_ALIGN(sizeof(*freq)), srcrt, srcrt->cmsg_len);
+#endif
+ if (setsockopt(icmp_sock, IPPROTO_IPV6, IPV6_FLOWLABEL_MGR,
+ freq, freq_len) == -1) {
+ perror ("can't set flowlabel");
+ exit(2);
+ }
+ flowlabel = freq->flr_label;
+#ifdef ENABLE_PING6_RTHDR
+ if (srcrt) {
+ cmsglen = (char*)srcrt - (char*)cmsgbuf;
+ srcrt = NULL;
+ }
+#endif
+#else
+ fprintf(stderr, "Flow labels are not supported.\n");
+ exit(2);
+#endif
+
+#ifdef IPV6_FLOWINFO_SEND
+ whereto.sin6_flowinfo = flowlabel;
+ if (setsockopt(icmp_sock, IPPROTO_IPV6, IPV6_FLOWINFO_SEND,
+ &on, sizeof(on)) == -1) {
+ perror ("can't send flowinfo");
+ exit(2);
+ }
+#else
+ fprintf(stderr, "Flowinfo is not supported.\n");
+ exit(2);
+#endif
+ }
+
+ printf("PING %s(%s) ", hostname, pr_addr(&whereto.sin6_addr));
+ if (flowlabel)
+ printf(", flow 0x%05x, ", (unsigned)ntohl(flowlabel));
+ if (device || (options&F_STRICTSOURCE)) {
+ printf("from %s %s: ",
+ pr_addr_n(&source.sin6_addr), device ? : "");
+ }
+ printf("%d data bytes\n", datalen);
+
+ setup(icmp_sock);
+
+ drop_capabilities();
+
+ main_loop(icmp_sock, packet, packlen);
+}
+
+int receive_error_msg()
+{
+ int res;
+ char cbuf[512];
+ struct iovec iov;
+ struct msghdr msg;
+ struct cmsghdr *cmsg;
+ struct sock_extended_err *e;
+ struct icmp6_hdr icmph;
+ struct sockaddr_in6 target;
+ int net_errors = 0;
+ int local_errors = 0;
+ int saved_errno = errno;
+
+ iov.iov_base = &icmph;
+ iov.iov_len = sizeof(icmph);
+ msg.msg_name = (void*)⌖
+ msg.msg_namelen = sizeof(target);
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+ msg.msg_flags = 0;
+ msg.msg_control = cbuf;
+ msg.msg_controllen = sizeof(cbuf);
+
+ res = recvmsg(icmp_sock, &msg, MSG_ERRQUEUE|MSG_DONTWAIT);
+ if (res < 0)
+ goto out;
+
+ e = NULL;
+ for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
+ if (cmsg->cmsg_level == SOL_IPV6) {
+ if (cmsg->cmsg_type == IPV6_RECVERR)
+ e = (struct sock_extended_err *)CMSG_DATA(cmsg);
+ }
+ }
+ if (e == NULL)
+ abort();
+
+ if (e->ee_origin == SO_EE_ORIGIN_LOCAL) {
+ local_errors++;
+ if (options & F_QUIET)
+ goto out;
+ if (options & F_FLOOD)
+ write_stdout("E", 1);
+ else if (e->ee_errno != EMSGSIZE)
+ fprintf(stderr, "ping: local error: %s\n", strerror(e->ee_errno));
+ else
+ fprintf(stderr, "ping: local error: Message too long, mtu=%u\n", e->ee_info);
+ nerrors++;
+ } else if (e->ee_origin == SO_EE_ORIGIN_ICMP6) {
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)(e+1);
+
+ if (res < sizeof(icmph) ||
+ memcmp(&target.sin6_addr, &whereto.sin6_addr, 16) ||
+ icmph.icmp6_type != ICMP6_ECHO_REQUEST ||
+ icmph.icmp6_id != ident) {
+ /* Not our error, not an error at all. Clear. */
+ saved_errno = 0;
+ goto out;
+ }
+
+ net_errors++;
+ nerrors++;
+ if (options & F_QUIET)
+ goto out;
+ if (options & F_FLOOD) {
+ write_stdout("\bE", 2);
+ } else {
+ print_timestamp();
+ printf("From %s icmp_seq=%u ", pr_addr(&sin6->sin6_addr), ntohs(icmph.icmp6_seq));
+ pr_icmph(e->ee_type, e->ee_code, e->ee_info);
+ putchar('\n');
+ fflush(stdout);
+ }
+ }
+
+out:
+ errno = saved_errno;
+ return net_errors ? : -local_errors;
+}
+
+/*
+ * pinger --
+ * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
+ * will be added on by the kernel. The ID field is our UNIX process ID,
+ * and the sequence number is an ascending integer. The first 8 bytes
+ * of the data portion are used to hold a UNIX "timeval" struct in VAX
+ * byte-order, to compute the round-trip time.
+ */
+int build_echo(__u8 *_icmph)
+{
+ struct icmp6_hdr *icmph;
+ int cc;
+
+ icmph = (struct icmp6_hdr *)_icmph;
+ icmph->icmp6_type = ICMP6_ECHO_REQUEST;
+ icmph->icmp6_code = 0;
+ icmph->icmp6_cksum = 0;
+ icmph->icmp6_seq = htons(ntransmitted+1);
+ icmph->icmp6_id = ident;
+
+ if (timing)
+ gettimeofday((struct timeval *)&outpack[8],
+ (struct timezone *)NULL);
+
+ cc = datalen + 8; /* skips ICMP portion */
+
+ return cc;
+}
+
+
+int build_niquery(__u8 *_nih)
+{
+ struct ni_hdr *nih;
+ int cc;
+
+ nih = (struct ni_hdr *)_nih;
+ nih->ni_cksum = 0;
+
+ nih->ni_type = ICMPV6_NI_QUERY;
+ cc = sizeof(*nih);
+ datalen = 0;
+
+ niquery_fill_nonce(ntransmitted + 1, nih->ni_nonce);
+ nih->ni_code = ni_subject_type;
+ nih->ni_qtype = htons(ni_query);
+ nih->ni_flags = ni_flag;
+ memcpy(nih + 1, ni_subject, ni_subject_len);
+ cc += ni_subject_len;
+
+ return cc;
+}
+
+int send_probe(void)
+{
+ int len, cc;
+
+ rcvd_clear(ntransmitted + 1);
+
+ if (niquery_is_enabled())
+ len = build_niquery(outpack);
+ else
+ len = build_echo(outpack);
+
+ if (cmsglen == 0) {
+ cc = sendto(icmp_sock, (char *)outpack, len, confirm,
+ (struct sockaddr *) &whereto,
+ sizeof(struct sockaddr_in6));
+ } else {
+ struct msghdr mhdr;
+ struct iovec iov;
+
+ iov.iov_len = len;
+ iov.iov_base = outpack;
+
+ memset(&mhdr, 0, sizeof(mhdr));
+ mhdr.msg_name = &whereto;
+ mhdr.msg_namelen = sizeof(struct sockaddr_in6);
+ mhdr.msg_iov = &iov;
+ mhdr.msg_iovlen = 1;
+ mhdr.msg_control = cmsgbuf;
+ mhdr.msg_controllen = cmsglen;
+
+ cc = sendmsg(icmp_sock, &mhdr, confirm);
+ }
+ confirm = 0;
+
+ return (cc == len ? 0 : cc);
+}
+
+void pr_echo_reply(__u8 *_icmph, int cc)
+{
+ struct icmp6_hdr *icmph = (struct icmp6_hdr *) _icmph;
+ printf(" icmp_seq=%u", ntohs(icmph->icmp6_seq));
+};
+
+static void putchar_safe(char c)
+{
+ if (isprint(c))
+ putchar(c);
+ else
+ printf("\\%03o", c);
+}
+
+void pr_niquery_reply_name(struct ni_hdr *nih, int len)
+{
+ __u8 *h = (__u8 *)(nih + 1);
+ __u8 *p = h + 4;
+ __u8 *end = (__u8 *)nih + len;
+ int continued = 0;
+ char buf[1024];
+ int ret;
+
+ len -= sizeof(struct ni_hdr) + 4;
+
+ if (len < 0) {
+ printf(" parse error (too short)");
+ return;
+ }
+ while (p < end) {
+ int fqdn = 1;
+ int i;
+
+ memset(buf, 0xff, sizeof(buf));
+
+ if (continued)
+ putchar(',');
+
+ ret = dn_expand(h, end, p, buf, sizeof(buf));
+ if (ret < 0) {
+ printf(" parse error (truncated)");
+ break;
+ }
+ if (p + ret < end && *(p + ret) == '\0')
+ fqdn = 0;
+
+ putchar(' ');
+ for (i = 0; i < strlen(buf); i++)
+ putchar_safe(buf[i]);
+ if (fqdn)
+ putchar('.');
+
+ p += ret + !fqdn;
+
+ continued = 1;
+ }
+}
+
+void pr_niquery_reply_addr(struct ni_hdr *nih, int len)
+{
+ __u8 *h = (__u8 *)(nih + 1);
+ __u8 *p = h + 4;
+ __u8 *end = (__u8 *)nih + len;
+ int af;
+ int aflen;
+ int continued = 0;
+ int truncated;
+ char buf[1024];
+
+ switch (ntohs(nih->ni_qtype)) {
+ case NI_QTYPE_IPV4ADDR:
+ af = AF_INET;
+ aflen = sizeof(struct in_addr);
+ truncated = nih->ni_flags & NI_IPV6ADDR_F_TRUNCATE;
+ break;
+ case NI_QTYPE_IPV6ADDR:
+ af = AF_INET6;
+ aflen = sizeof(struct in6_addr);
+ truncated = nih->ni_flags & NI_IPV4ADDR_F_TRUNCATE;
+ break;
+ default:
+ /* should not happen */
+ af = aflen = truncated = 0;
+ }
+ p = h;
+ if (len < 0) {
+ printf(" parse error (too short)");
+ return;
+ }
+
+ while (p < end) {
+ if (continued)
+ putchar(',');
+
+ if (p + sizeof(__u32) + aflen > end) {
+ printf(" parse error (truncated)");
+ break;
+ }
+ if (!inet_ntop(af, p + sizeof(__u32), buf, sizeof(buf)))
+ printf(" unexpeced error in inet_ntop(%s)",
+ strerror(errno));
+ else
+ printf(" %s", buf);
+ p += sizeof(__u32) + aflen;
+
+ continued = 1;
+ }
+ if (truncated)
+ printf(" (truncated)");
+}
+
+void pr_niquery_reply(__u8 *_nih, int len)
+{
+ struct ni_hdr *nih = (struct ni_hdr *)_nih;
+
+ switch (nih->ni_code) {
+ case NI_SUCCESS:
+ switch (ntohs(nih->ni_qtype)) {
+ case NI_QTYPE_NAME:
+ pr_niquery_reply_name(nih, len);
+ break;
+ case NI_QTYPE_IPV4ADDR:
+ case NI_QTYPE_IPV6ADDR:
+ pr_niquery_reply_addr(nih, len);
+ break;
+ default:
+ printf(" unknown qtype(0x%02x)", ntohs(nih->ni_qtype));
+ }
+ break;
+ case NI_REFUSED:
+ printf(" refused");
+ break;
+ case NI_UNKNOWN:
+ printf(" unknown");
+ break;
+ default:
+ printf(" unknown code(%02x)", ntohs(nih->ni_code));
+ }
+ printf("; seq=%u;", ntohsp((__u16*)nih->ni_nonce));
+}
+
+/*
+ * parse_reply --
+ * Print out the packet, if it came from us. This logic is necessary
+ * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
+ * which arrive ('tis only fair). This permits multiple copies of this
+ * program to be run without having intermingled output (or statistics!).
+ */
+int
+parse_reply(struct msghdr *msg, int cc, void *addr, struct timeval *tv)
+{
+ struct sockaddr_in6 *from = addr;
+ __u8 *buf = msg->msg_iov->iov_base;
+ struct cmsghdr *c;
+ struct icmp6_hdr *icmph;
+ int hops = -1;
+
+ for (c = CMSG_FIRSTHDR(msg); c; c = CMSG_NXTHDR(msg, c)) {
+ if (c->cmsg_level != SOL_IPV6)
+ continue;
+ switch(c->cmsg_type) {
+ case IPV6_HOPLIMIT:
+#ifdef IPV6_2292HOPLIMIT
+ case IPV6_2292HOPLIMIT:
+#endif
+ if (c->cmsg_len < CMSG_LEN(sizeof(int)))
+ continue;
+ memcpy(&hops, CMSG_DATA(c), sizeof(hops));
+ }
+ }
+
+
+ /* Now the ICMP part */
+
+ icmph = (struct icmp6_hdr *) buf;
+ if (cc < 8) {
+ if (options & F_VERBOSE)
+ fprintf(stderr, "ping: packet too short (%d bytes)\n", cc);
+ return 1;
+ }
+
+ if (icmph->icmp6_type == ICMP6_ECHO_REPLY) {
+ if (icmph->icmp6_id != ident)
+ return 1;
+ if (gather_statistics((__u8*)icmph, sizeof(*icmph), cc,
+ ntohs(icmph->icmp6_seq),
+ hops, 0, tv, pr_addr(&from->sin6_addr),
+ pr_echo_reply))
+ return 0;
+ } else if (icmph->icmp6_type == ICMPV6_NI_REPLY) {
+ struct ni_hdr *nih = (struct ni_hdr *)icmph;
+ int seq = niquery_check_nonce(nih->ni_nonce);
+ if (seq < 0)
+ return 1;
+ if (gather_statistics((__u8*)icmph, sizeof(*icmph), cc,
+ seq,
+ hops, 0, tv, pr_addr(&from->sin6_addr),
+ pr_niquery_reply))
+ return 0;
+ } else {
+ int nexthdr;
+ struct ip6_hdr *iph1 = (struct ip6_hdr*)(icmph+1);
+ struct icmp6_hdr *icmph1 = (struct icmp6_hdr *)(iph1+1);
+
+ /* We must not ever fall here. All the messages but
+ * echo reply are blocked by filter and error are
+ * received with IPV6_RECVERR. Ugly code is preserved
+ * however, just to remember what crap we avoided
+ * using RECVRERR. :-)
+ */
+
+ if (cc < 8+sizeof(struct ip6_hdr)+8)
+ return 1;
+
+ if (memcmp(&iph1->ip6_dst, &whereto.sin6_addr, 16))
+ return 1;
+
+ nexthdr = iph1->ip6_nxt;
+
+ if (nexthdr == 44) {
+ nexthdr = *(__u8*)icmph1;
+ icmph1++;
+ }
+ if (nexthdr == IPPROTO_ICMPV6) {
+ if (icmph1->icmp6_type != ICMP6_ECHO_REQUEST ||
+ icmph1->icmp6_id != ident)
+ return 1;
+ acknowledge(ntohs(icmph1->icmp6_seq));
+ if (working_recverr)
+ return 0;
+ nerrors++;
+ if (options & F_FLOOD) {
+ write_stdout("\bE", 2);
+ return 0;
+ }
+ print_timestamp();
+ printf("From %s: icmp_seq=%u ", pr_addr(&from->sin6_addr), ntohs(icmph1->icmp6_seq));
+ } else {
+ /* We've got something other than an ECHOREPLY */
+ if (!(options & F_VERBOSE) || uid)
+ return 1;
+ print_timestamp();
+ printf("From %s: ", pr_addr(&from->sin6_addr));
+ }
+ pr_icmph(icmph->icmp6_type, icmph->icmp6_code, ntohl(icmph->icmp6_mtu));
+ }
+
+ if (!(options & F_FLOOD)) {
+ if (options & F_AUDIBLE)
+ putchar('\a');
+ putchar('\n');
+ fflush(stdout);
+ } else {
+ putchar('\a');
+ fflush(stdout);
+ }
+ return 0;
+}
+
+
+int pr_icmph(__u8 type, __u8 code, __u32 info)
+{
+ switch(type) {
+ case ICMP6_DST_UNREACH:
+ printf("Destination unreachable: ");
+ switch (code) {
+ case ICMP6_DST_UNREACH_NOROUTE:
+ printf("No route");
+ break;
+ case ICMP6_DST_UNREACH_ADMIN:
+ printf("Administratively prohibited");
+ break;
+ case ICMP6_DST_UNREACH_BEYONDSCOPE:
+ printf("Beyond scope of source address");
+ break;
+ case ICMP6_DST_UNREACH_ADDR:
+ printf("Address unreachable");
+ break;
+ case ICMP6_DST_UNREACH_NOPORT:
+ printf("Port unreachable");
+ break;
+ default:
+ printf("Unknown code %d", code);
+ break;
+ }
+ break;
+ case ICMP6_PACKET_TOO_BIG:
+ printf("Packet too big: mtu=%u", info);
+ if (code)
+ printf(", code=%d", code);
+ break;
+ case ICMP6_TIME_EXCEEDED:
+ printf("Time exceeded: ");
+ if (code == ICMP6_TIME_EXCEED_TRANSIT)
+ printf("Hop limit");
+ else if (code == ICMP6_TIME_EXCEED_REASSEMBLY)
+ printf("Defragmentation failure");
+ else
+ printf("code %d", code);
+ break;
+ case ICMP6_PARAM_PROB:
+ printf("Parameter problem: ");
+ if (code == ICMP6_PARAMPROB_HEADER)
+ printf("Wrong header field ");
+ else if (code == ICMP6_PARAMPROB_NEXTHEADER)
+ printf("Unknown header ");
+ else if (code == ICMP6_PARAMPROB_OPTION)
+ printf("Unknown option ");
+ else
+ printf("code %d ", code);
+ printf ("at %u", info);
+ break;
+ case ICMP6_ECHO_REQUEST:
+ printf("Echo request");
+ break;
+ case ICMP6_ECHO_REPLY:
+ printf("Echo reply");
+ break;
+ case MLD_LISTENER_QUERY:
+ printf("MLD Query");
+ break;
+ case MLD_LISTENER_REPORT:
+ printf("MLD Report");
+ break;
+ case MLD_LISTENER_REDUCTION:
+ printf("MLD Reduction");
+ break;
+ default:
+ printf("unknown icmp type: %u", type);
+
+ }
+ return 0;
+}
+
+#include <linux/filter.h>
+
+void install_filter(void)
+{
+ static int once;
+ static struct sock_filter insns[] = {
+ BPF_STMT(BPF_LD|BPF_H|BPF_ABS, 4), /* Load icmp echo ident */
+ BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, 0xAAAA, 0, 1), /* Ours? */
+ BPF_STMT(BPF_RET|BPF_K, ~0U), /* Yes, it passes. */
+ BPF_STMT(BPF_LD|BPF_B|BPF_ABS, 0), /* Load icmp type */
+ BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, ICMP6_ECHO_REPLY, 1, 0), /* Echo? */
+ BPF_STMT(BPF_RET|BPF_K, ~0U), /* No. It passes. This must not happen. */
+ BPF_STMT(BPF_RET|BPF_K, 0), /* Echo with wrong ident. Reject. */
+ };
+ static struct sock_fprog filter = {
+ sizeof insns / sizeof(insns[0]),
+ insns
+ };
+
+ if (once)
+ return;
+ once = 1;
+
+ /* Patch bpflet for current identifier. */
+ insns[1] = (struct sock_filter)BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, htons(ident), 0, 1);
+
+ if (setsockopt(icmp_sock, SOL_SOCKET, SO_ATTACH_FILTER, &filter, sizeof(filter)))
+ perror("WARNING: failed to install socket filter\n");
+}
+
+
+/*
+ * pr_addr --
+ * Return an ascii host address as a dotted quad and optionally with
+ * a hostname.
+ */
+char * pr_addr(struct in6_addr *addr)
+{
+ struct hostent *hp = NULL;
+ static char *s;
+
+#ifdef USE_IDN
+ free(s);
+#endif
+
+ in_pr_addr = !setjmp(pr_addr_jmp);
+
+ if (!(exiting || options&F_NUMERIC))
+ hp = gethostbyaddr((__u8*)addr, sizeof(struct in6_addr), AF_INET6);
+
+ in_pr_addr = 0;
+
+ if (!hp
+#ifdef USE_IDN
+ || idna_to_unicode_lzlz(hp->h_name, &s, 0) != IDNA_SUCCESS
+#endif
+ )
+ s = NULL;
+
+ return hp ? (s ? s : hp->h_name) : pr_addr_n(addr);
+}
+
+char * pr_addr_n(struct in6_addr *addr)
+{
+ static char str[64];
+ inet_ntop(AF_INET6, addr, str, sizeof(str));
+ return str;
+}
+
+#define USAGE_NEWLINE "\n "
+
+void usage(void)
+{
+ fprintf(stderr,
+ "Usage: ping6"
+ " [-"
+ "aAbBdDfhLnOqrRUvV"
+ "]"
+ " [-c count]"
+ " [-i interval]"
+ " [-I interface]"
+ USAGE_NEWLINE
+ " [-l preload]"
+ " [-m mark]"
+ " [-M pmtudisc_option]"
+ USAGE_NEWLINE
+ " [-N nodeinfo_option]"
+ " [-p pattern]"
+ " [-Q tclass]"
+ " [-s packetsize]"
+ USAGE_NEWLINE
+ " [-S sndbuf]"
+ " [-t ttl]"
+ " [-T timestamp_option]"
+ " [-w deadline]"
+ USAGE_NEWLINE
+ " [-W timeout]"
+#ifdef ENABLE_PING6_RTHDR
+ " [hop1 ...]"
+#endif
+ " destination"
+ "\n"
+ );
+ exit(2);
+}