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fping.c
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fping.c
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/*
* fping: fast-ping, file-ping, favorite-ping, funky-ping
*
* Ping a list of target hosts in a round robin fashion.
* A better ping overall.
*
* fping website: http://www.fping.org
*
* Current maintainer of fping: David Schweikert
* Please send suggestions and patches to: david@schweikert.ch
*
*
* Original author: Roland Schemers <schemers@stanford.edu>
* IPv6 Support: Jeroen Massar <jeroen@unfix.org / jeroen@ipng.nl>
* Improved main loop: David Schweikert <david@schweikert.ch>
* Debian Merge, TOS settings: Tobi Oetiker <tobi@oetiker.ch>
* Bugfixes, byte order & senseful seq.-numbers: Stephan Fuhrmann (stephan.fuhrmann AT 1und1.de)
*
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by Stanford University. The name of the University may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include "fping.h"
#include "config.h"
#include "options.h"
#include "optparse.h"
#include <errno.h>
#include <inttypes.h>
#include <signal.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <time.h>
#include "seqmap.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif /* HAVE_STDLIB_H */
#include <stddef.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/types.h>
#if HAVE_SYS_FILE_H
#include <sys/file.h>
#endif /* HAVE_SYS_FILE_H */
#ifdef IPV6
#include <netinet/icmp6.h>
#endif
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <netdb.h>
#include <sys/select.h>
/*** compatibility ***/
/* Mac OS X's getaddrinfo() does not fail if we use an invalid combination,
* e.g. AF_INET6 with "127.0.0.1". If we pass AI_UNUSABLE to flags, it behaves
* like other platforms. But AI_UNUSABLE isn't available on other platforms,
* and we can safely use 0 for flags instead.
*/
#ifndef AI_UNUSABLE
#define AI_UNUSABLE 0
#endif
/* MSG_TRUNC available on Linux kernel 2.2+, makes recvmsg return the full
* length of the raw packet received, even if the buffer is smaller */
#ifndef MSG_TRUNC
#define MSG_TRUNC 0
#define RECV_BUFSIZE 4096
#else
#define RECV_BUFSIZE 128
#endif
/*** externals ***/
extern char *optarg;
extern int optind, opterr;
#ifndef h_errno
extern int h_errno;
#endif
#ifdef __cplusplus
}
#endif /* __cplusplus */
/*** Constants ***/
/* CLOCK_MONTONIC starts under macOS, OpenBSD and FreeBSD with undefined positive point and can not be use
* see github PR #217
* The configure script detect the predefined operating systems an set CLOCK_REALTIME using over ONLY_CLOCK_REALTIME variable
*/
#if HAVE_SO_TIMESTAMPNS || ONLY_CLOCK_REALTIME
#define CLOCKID CLOCK_REALTIME
#endif
#if !defined(CLOCKID)
#if defined(CLOCK_MONOTONIC)
#define CLOCKID CLOCK_MONOTONIC
#else
#define CLOCKID CLOCK_REALTIME
#endif
#endif
/*** Ping packet defines ***/
#define MAX_IP_PACKET 65535 /* (theoretical) max IPv4 packet size */
#define SIZE_IP_HDR 20 /* min IPv4 header size */
#define SIZE_ICMP_HDR 8 /* from ip_icmp.h */
#define MAX_PING_DATA (MAX_IP_PACKET - SIZE_IP_HDR - SIZE_ICMP_HDR)
#define MAX_GENERATE 131070 /* maximum number of hosts that -g can generate */
/* sized so as to be like traditional ping */
#define DEFAULT_PING_DATA_SIZE 56
/* maxima and minima */
#ifdef FPING_SAFE_LIMITS
#define MIN_INTERVAL 1 /* in millisec */
#define MIN_PERHOST_INTERVAL 10 /* in millisec */
#else
#define MIN_INTERVAL 0
#define MIN_PERHOST_INTERVAL 0
#endif
/* response time array flags */
#define RESP_WAITING -1
#define RESP_UNUSED -2
#define RESP_ERROR -3
#define RESP_TIMEOUT -4
/* debugging flags */
#if defined(DEBUG) || defined(_DEBUG)
#define DBG_TRACE 1
#define DBG_SENT_TIMES 2
#define DBG_RANDOM_LOSE_FEW 4
#define DBG_RANDOM_LOSE_MANY 8
#define DBG_PRINT_PER_SYSTEM 16
#define DBG_REPORT_ALL_RTTS 32
#endif /* DEBUG || _DEBUG */
/* Long names for ICMP packet types */
#define ICMP_TYPE_STR_MAX 18
char *icmp_type_str[19] = {
"ICMP Echo Reply", /* 0 */
"",
"",
"ICMP Unreachable", /* 3 */
"ICMP Source Quench", /* 4 */
"ICMP Redirect", /* 5 */
"",
"",
"ICMP Echo", /* 8 */
"",
"",
"ICMP Time Exceeded", /* 11 */
"ICMP Parameter Problem", /* 12 */
"ICMP Timestamp Request", /* 13 */
"ICMP Timestamp Reply", /* 14 */
"ICMP Information Request", /* 15 */
"ICMP Information Reply", /* 16 */
"ICMP Mask Request", /* 17 */
"ICMP Mask Reply" /* 18 */
};
char *icmp_unreach_str[16] = {
"ICMP Network Unreachable", /* 0 */
"ICMP Host Unreachable", /* 1 */
"ICMP Protocol Unreachable", /* 2 */
"ICMP Port Unreachable", /* 3 */
"ICMP Unreachable (Fragmentation Needed)", /* 4 */
"ICMP Unreachable (Source Route Failed)", /* 5 */
"ICMP Unreachable (Destination Network Unknown)", /* 6 */
"ICMP Unreachable (Destination Host Unknown)", /* 7 */
"ICMP Unreachable (Source Host Isolated)", /* 8 */
"ICMP Unreachable (Communication with Network Prohibited)", /* 9 */
"ICMP Unreachable (Communication with Host Prohibited)", /* 10 */
"ICMP Unreachable (Network Unreachable For Type Of Service)", /* 11 */
"ICMP Unreachable (Host Unreachable For Type Of Service)", /* 12 */
"ICMP Unreachable (Communication Administratively Prohibited)", /* 13 */
"ICMP Unreachable (Host Precedence Violation)", /* 14 */
"ICMP Unreachable (Precedence cutoff in effect)" /* 15 */
};
#define ICMP_UNREACH_MAXTYPE 15
struct event;
typedef struct host_entry {
int i; /* index into array */
char *name; /* name as given by user */
char *host; /* text description of host */
struct sockaddr_storage saddr; /* internet address */
socklen_t saddr_len;
int64_t timeout; /* time to wait for response */
int64_t last_send_time; /* time of last packet sent */
int num_sent; /* number of ping packets sent (for statistics) */
int num_recv; /* number of pings received (duplicates ignored) */
int num_recv_total; /* number of pings received, including duplicates */
int64_t max_reply; /* longest response time */
int64_t min_reply; /* shortest response time */
int64_t total_time; /* sum of response times */
/* _i -> splits (reset on every report interval) */
int num_sent_i; /* number of ping packets sent */
int num_recv_i; /* number of pings received */
int64_t max_reply_i; /* longest response time */
int64_t min_reply_i; /* shortest response time */
int64_t total_time_i; /* sum of response times */
int64_t *resp_times; /* individual response times */
/* to avoid allocating two struct events each time that we send a ping, we
* preallocate here two struct events for each ping that we might send for
* this host. */
struct event *event_storage_ping;
struct event *event_storage_timeout;
} HOST_ENTRY;
int event_storage_count; /* how many events can be stored in host_entry->event_storage_xxx */
/* basic algorithm to ensure that we have correct data at all times:
*
* 1. when a ping is sent:
* - two events get added into event_queue:
* - t+PERIOD: ping event
* - t+TIMEOUT: timeout event
*
* 2. when a ping is received:
* - record statistics (increase num_sent and num_received)
* - remove timeout event (we store the event in seqmap, so that we can retrieve it when the response is received)
*
* 3. when a timeout happens:
* - record statistics (increase num_sent only)
*/
#define EV_TYPE_PING 1
#define EV_TYPE_TIMEOUT 2
struct event {
struct event *ev_prev;
struct event *ev_next;
int64_t ev_time;
struct host_entry *host;
int ping_index;
};
struct event_queue {
struct event *first;
struct event *last;
};
/*** globals ***/
HOST_ENTRY **table = NULL; /* array of pointers to items in the list */
/* we keep two separate queues: a ping queue, for when the next ping should be
* sent, and a timeout queue. the reason for having two separate queues is that
* the ping period and the timeout value are different, so if we put them in
* the same event queue, we would need to scan many more entries when inserting
* into the sorted list.
*/
struct event_queue event_queue_ping;
struct event_queue event_queue_timeout;
char *prog;
int ident4 = 0; /* our icmp identity field */
int ident6 = 0;
int socket4 = -1;
int socktype4 = -1;
int using_sock_dgram4 = 0;
#ifndef IPV6
int hints_ai_family = AF_INET;
#else
int socket6 = -1;
int socktype6 = -1;
int hints_ai_family = AF_UNSPEC;
#endif
volatile sig_atomic_t status_snapshot = 0;
volatile sig_atomic_t finish_requested = 0;
unsigned int debugging = 0;
/* all time-related values are int64_t nanoseconds */
unsigned int retry = DEFAULT_RETRY;
int64_t timeout = (int64_t)DEFAULT_TIMEOUT * 1000000;
int64_t interval = (int64_t)DEFAULT_INTERVAL * 1000000;
int64_t perhost_interval = (int64_t)DEFAULT_PERHOST_INTERVAL * 1000000;
float backoff = DEFAULT_BACKOFF_FACTOR;
unsigned int ping_data_size = DEFAULT_PING_DATA_SIZE;
unsigned int count = 1, min_reachable = 0;
unsigned int trials;
int64_t report_interval = 0;
unsigned int ttl = 0;
int src_addr_set = 0;
struct in_addr src_addr;
#ifdef IPV6
int src_addr6_set = 0;
struct in6_addr src_addr6;
#endif
/* global stats */
int64_t max_reply = 0;
int64_t min_reply = 0;
int64_t total_replies = 0;
int64_t sum_replies = 0;
int max_hostname_len = 0;
int num_hosts = 0; /* total number of hosts */
int num_alive = 0, /* total number alive */
num_unreachable = 0, /* total number unreachable */
num_noaddress = 0; /* total number of addresses not found */
int num_timeout = 0, /* number of times select timed out */
num_pingsent = 0, /* total pings sent */
num_pingreceived = 0, /* total pings received */
num_othericmprcvd = 0; /* total non-echo-reply ICMP received */
struct timespec current_time; /* current time (pseudo) */
int64_t current_time_ns;
int64_t start_time;
int64_t end_time;
int64_t last_send_time; /* time last ping was sent */
int64_t next_report_time; /* time next -Q report is expected */
/* switches */
int generate_flag = 0; /* flag for IP list generation */
int verbose_flag, quiet_flag, stats_flag, unreachable_flag, alive_flag;
int elapsed_flag, version_flag, count_flag, loop_flag, netdata_flag;
int per_recv_flag, report_all_rtts_flag, name_flag, addr_flag, backoff_flag, rdns_flag;
int multif_flag, timeout_flag, fast_reachable;
int outage_flag = 0;
int timestamp_flag = 0;
int timestamp_format_flag = 0;
int random_data_flag = 0;
int cumulative_stats_flag = 0;
int check_source_flag = 0;
int print_tos_flag = 0;
int print_ttl_flag = 0;
#if defined(DEBUG) || defined(_DEBUG)
int randomly_lose_flag, trace_flag, print_per_system_flag;
int lose_factor;
#endif /* DEBUG || _DEBUG */
unsigned int fwmark = 0;
char *filename = NULL; /* file containing hosts to ping */
/*** forward declarations ***/
void add_name(char *name);
void add_addr(char *name, char *host, struct sockaddr *ipaddr, socklen_t ipaddr_len);
char *na_cat(char *name, struct in_addr ipaddr);
void crash_and_burn(char *message);
void errno_crash_and_burn(char *message);
char *get_host_by_address(struct in_addr in);
int send_ping(HOST_ENTRY *h, int index);
void usage(int);
int wait_for_reply(int64_t);
void print_per_system_stats(void);
void print_per_system_splits(void);
void stats_reset_interval(HOST_ENTRY *h);
void print_netdata(void);
void print_global_stats(void);
void main_loop();
void signal_handler(int);
void finish();
const char *sprint_tm(int64_t t);
void ev_enqueue(struct event_queue *queue, struct event *event);
struct event *ev_dequeue(struct event_queue *queue);
void ev_remove(struct event_queue *queue, struct event *event);
void add_cidr(char *);
void add_range(char *, char *);
void add_addr_range_ipv4(unsigned long, unsigned long);
void print_warning(char *fmt, ...);
int addr_cmp(struct sockaddr *a, struct sockaddr *b);
void host_add_ping_event(HOST_ENTRY *h, int index, int64_t ev_time);
void host_add_timeout_event(HOST_ENTRY *h, int index, int64_t ev_time);
struct event *host_get_timeout_event(HOST_ENTRY *h, int index);
void stats_add(HOST_ENTRY *h, int index, int success, int64_t latency);
void update_current_time();
void print_timestamp_format(int64_t current_time_ns, int timestamp_format);
/************************************************************
Function: p_setsockopt
*************************************************************
Inputs: p_uid: privileged uid. Others as per setsockopt(2)
Description:
Elevates privileges to p_uid when required, calls
setsockopt, and drops privileges back.
************************************************************/
int p_setsockopt(uid_t p_uid, int sockfd, int level, int optname,
const void *optval, socklen_t optlen)
{
const uid_t saved_uid = geteuid();
int res;
if (p_uid != saved_uid && seteuid(p_uid)) {
perror("cannot elevate privileges for setsockopt");
}
res = setsockopt(sockfd, level, optname, optval, optlen);
if (p_uid != saved_uid && seteuid(saved_uid)) {
perror("fatal error: could not drop privileges after setsockopt");
/* continuing would be a security hole */
exit(4);
}
return res;
}
/************************************************************
Function: main
*************************************************************
Inputs: int argc, char** argv
Description:
Main program entry point
************************************************************/
int main(int argc, char **argv)
{
/* Debug: CPU Performance */
#if defined(DEBUG) || defined(_DEBUG)
clock_t perf_cpu_start, perf_cpu_end;
double perf_cpu_time_used;
perf_cpu_start = clock();
#endif /* DEBUG || _DEBUG */
int c;
const uid_t suid = geteuid();
int tos = 0;
struct optparse optparse_state;
#ifdef USE_SIGACTION
struct sigaction act;
#endif
/* pre-parse -h/--help, so that we also can output help information
* without trying to open the socket, which might fail */
prog = argv[0];
if (argc == 2 && (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0)) {
usage(0);
}
socket4 = open_ping_socket_ipv4(&socktype4);
#ifdef __linux__
/* We only treat SOCK_DGRAM differently on Linux, where the IPv4 header
* structure is missing in the message.
*/
using_sock_dgram4 = (socktype4 == SOCK_DGRAM);
#endif
#ifdef IPV6
socket6 = open_ping_socket_ipv6(&socktype6);
/* if called (sym-linked) via 'fping6', imply '-6'
* for backward compatibility */
if (strstr(prog, "fping6")) {
hints_ai_family = AF_INET6;
}
#endif
memset(&src_addr, 0, sizeof(src_addr));
#ifdef IPV6
memset(&src_addr6, 0, sizeof(src_addr6));
#endif
if (!suid && suid != getuid()) {
/* *temporarily* drop privileges */
if (seteuid(getuid()) == -1)
perror("cannot setuid");
}
optparse_init(&optparse_state, argv);
ident4 = ident6 = htons(getpid() & 0xFFFF);
verbose_flag = 1;
backoff_flag = 1;
opterr = 1;
/* get command line options */
struct optparse_long longopts[] = {
{ "ipv4", '4', OPTPARSE_NONE },
{ "ipv6", '6', OPTPARSE_NONE },
{ "alive", 'a', OPTPARSE_NONE },
{ "addr", 'A', OPTPARSE_NONE },
{ "size", 'b', OPTPARSE_REQUIRED },
{ "backoff", 'B', OPTPARSE_REQUIRED },
{ "count", 'c', OPTPARSE_REQUIRED },
{ "vcount", 'C', OPTPARSE_REQUIRED },
{ "rdns", 'd', OPTPARSE_NONE },
{ "timestamp", 'D', OPTPARSE_NONE },
{ "timestamp-format", '0', OPTPARSE_REQUIRED },
{ "elapsed", 'e', OPTPARSE_NONE },
{ "file", 'f', OPTPARSE_REQUIRED },
{ "generate", 'g', OPTPARSE_NONE },
{ "help", 'h', OPTPARSE_NONE },
{ "ttl", 'H', OPTPARSE_REQUIRED },
{ "interval", 'i', OPTPARSE_REQUIRED },
{ "iface", 'I', OPTPARSE_REQUIRED },
#ifdef SO_MARK
{ "fwmark", 'k', OPTPARSE_REQUIRED },
#endif
{ "loop", 'l', OPTPARSE_NONE },
{ "all", 'm', OPTPARSE_NONE },
{ "dontfrag", 'M', OPTPARSE_NONE },
{ "name", 'n', OPTPARSE_NONE },
{ "netdata", 'N', OPTPARSE_NONE },
{ "outage", 'o', OPTPARSE_NONE },
{ "tos", 'O', OPTPARSE_REQUIRED },
{ "period", 'p', OPTPARSE_REQUIRED },
{ "quiet", 'q', OPTPARSE_NONE },
{ "squiet", 'Q', OPTPARSE_REQUIRED },
{ "retry", 'r', OPTPARSE_REQUIRED },
{ "random", 'R', OPTPARSE_NONE },
{ "stats", 's', OPTPARSE_NONE },
{ "src", 'S', OPTPARSE_REQUIRED },
{ "timeout", 't', OPTPARSE_REQUIRED },
{ NULL, 'T', OPTPARSE_REQUIRED },
{ "unreach", 'u', OPTPARSE_NONE },
{ "version", 'v', OPTPARSE_NONE },
{ "reachable", 'x', OPTPARSE_REQUIRED },
{ "fast-reachable", 'X', OPTPARSE_REQUIRED },
{ "check-source", '0', OPTPARSE_NONE },
{ "print-tos", '0', OPTPARSE_NONE },
{ "print-ttl", '0', OPTPARSE_NONE },
#if defined(DEBUG) || defined(_DEBUG)
{ NULL, 'z', OPTPARSE_REQUIRED },
#endif
{ 0, 0, 0 }
};
float opt_value_float;
while ((c = optparse_long(&optparse_state, longopts, NULL)) != EOF) {
switch (c) {
case '0':
if(strstr(optparse_state.optlongname, "timestamp-format") != NULL) {
if(strcmp(optparse_state.optarg, "ctime") == 0) {
timestamp_format_flag = 1;
}else if(strcmp(optparse_state.optarg, "iso") == 0) {
timestamp_format_flag = 2;
}else if(strcmp(optparse_state.optarg, "rfc3339") == 0) {
timestamp_format_flag = 3;
}else{
usage(1);
}
} else if (strstr(optparse_state.optlongname, "check-source") != NULL) {
check_source_flag = 1;
} else if (strstr(optparse_state.optlongname, "print-tos") != NULL) {
print_tos_flag = 1;
} else if (strstr(optparse_state.optlongname, "print-ttl") != NULL) {
print_ttl_flag = 1;
} else {
usage(1);
}
break;
case '4':
#ifdef IPV6
if (hints_ai_family != AF_UNSPEC && hints_ai_family != AF_INET) {
fprintf(stderr, "%s: can't specify both -4 and -6\n", prog);
exit(1);
}
hints_ai_family = AF_INET;
#endif
break;
case '6':
#ifdef IPV6
if (hints_ai_family != AF_UNSPEC && hints_ai_family != AF_INET6) {
fprintf(stderr, "%s: can't specify both -4 and -6\n", prog);
exit(1);
}
hints_ai_family = AF_INET6;
#else
fprintf(stderr, "%s: IPv6 not supported by this binary\n", prog);
exit(1);
#endif
break;
case 'M':
#ifdef IP_MTU_DISCOVER
if (socket4 >= 0) {
int val = IP_PMTUDISC_DO;
if (setsockopt(socket4, IPPROTO_IP, IP_MTU_DISCOVER, &val, sizeof(val))) {
perror("setsockopt IP_MTU_DISCOVER");
}
}
#ifdef IPV6
if (socket6 >= 0) {
int val = IPV6_PMTUDISC_DO;
if (setsockopt(socket6, IPPROTO_IPV6, IPV6_MTU_DISCOVER, &val, sizeof(val))) {
perror("setsockopt IPV6_MTU_DISCOVER");
}
}
#endif
#else
fprintf(stderr, "%s, -M option not supported on this platform\n", prog);
exit(1);
#endif
break;
case 't':
if (sscanf(optparse_state.optarg, "%f", &opt_value_float) != 1)
usage(1);
if (opt_value_float < 0) {
usage(1);
}
timeout = opt_value_float * 1000000;
timeout_flag = 1;
break;
case 'r':
if (sscanf(optparse_state.optarg, "%u", &retry) != 1)
usage(1);
break;
case 'i':
if (sscanf(optparse_state.optarg, "%f", &opt_value_float) != 1)
usage(1);
if (opt_value_float < 0) {
usage(1);
}
interval = opt_value_float * 1000000;
break;
case 'p':
if (sscanf(optparse_state.optarg, "%f", &opt_value_float) != 1)
usage(1);
if (opt_value_float < 0) {
usage(1);
}
perhost_interval = opt_value_float * 1000000;
break;
case 'c':
if (!(count = (unsigned int)atoi(optparse_state.optarg)))
usage(1);
count_flag = 1;
break;
case 'C':
if (!(count = (unsigned int)atoi(optparse_state.optarg)))
usage(1);
count_flag = 1;
report_all_rtts_flag = 1;
break;
case 'b':
if (sscanf(optparse_state.optarg, "%u", &ping_data_size) != 1)
usage(1);
break;
case 'h':
usage(0);
break;
case 'q':
verbose_flag = 0;
quiet_flag = 1;
break;
case 'Q':
verbose_flag = 0;
quiet_flag = 1;
if (sscanf(optparse_state.optarg, "%f", &opt_value_float) != 1)
usage(1);
if (opt_value_float < 0) {
usage(1);
}
report_interval = opt_value_float * 1e9;
/* recognize keyword(s) after number, ignore everything else */
{
char *comma = strchr(optparse_state.optarg, ',');
if ((comma != NULL) && (strcmp(++comma, "cumulative") == 0)) {
cumulative_stats_flag = 1;
}
}
break;
case 'e':
elapsed_flag = 1;
break;
case 'm':
multif_flag = 1;
break;
case 'N':
netdata_flag = 1;
break;
case 'n':
name_flag = 1;
if (rdns_flag) {
fprintf(stderr, "%s: use either one of -d or -n\n", prog);
exit(1);
}
break;
case 'd':
rdns_flag = 1;
if (name_flag) {
fprintf(stderr, "%s: use either one of -d or -n\n", prog);
exit(1);
}
break;
case 'A':
addr_flag = 1;
break;
case 'B':
if (!(backoff = atof(optparse_state.optarg)))
usage(1);
break;
case 's':
stats_flag = 1;
break;
case 'D':
timestamp_flag = 1;
break;
case 'R':
random_data_flag = 1;
break;
case 'l':
loop_flag = 1;
backoff_flag = 0;
break;
case 'u':
unreachable_flag = 1;
break;
case 'a':
alive_flag = 1;
break;
case 'H':
if (!(ttl = (unsigned int)atoi(optparse_state.optarg)))
usage(1);
break;
#if defined(DEBUG) || defined(_DEBUG)
case 'z':
if (sscanf(optparse_state.optarg, "0x%x", &debugging) != 1)
if (sscanf(optparse_state.optarg, "%u", &debugging) != 1)
usage(1);
break;
#endif /* DEBUG || _DEBUG */
case 'v':
printf("%s: Version %s\n", prog, VERSION);
exit(0);
case 'x':
if (!(min_reachable = (unsigned int)atoi(optparse_state.optarg)))
usage(1);
break;
case 'X':
if (!(min_reachable = (unsigned int)atoi(optparse_state.optarg)))
usage(1);
fast_reachable = 1;
break;
case 'f':
filename = optparse_state.optarg;
break;
#ifdef SO_MARK
case 'k':
if (!(fwmark = (unsigned int)atol(optparse_state.optarg)))
usage(1);
if (socket4 >= 0)
if(-1 == p_setsockopt(suid, socket4, SOL_SOCKET, SO_MARK, &fwmark, sizeof fwmark))
perror("fwmark ipv4");
#ifdef IPV6
if (socket6 >= 0)
if(-1 == p_setsockopt(suid, socket6, SOL_SOCKET, SO_MARK, &fwmark, sizeof fwmark))
perror("fwmark ipv6");
#endif
break;
#endif
case 'g':
/* use IP list generation */
/* mutually exclusive with using file input or command line targets */
generate_flag = 1;
break;
case 'S':
if (inet_pton(AF_INET, optparse_state.optarg, &src_addr)) {
src_addr_set = 1;
break;
}
#ifdef IPV6
if (inet_pton(AF_INET6, optparse_state.optarg, &src_addr6)) {
src_addr6_set = 1;
break;
}
#endif
fprintf(stderr, "%s: can't parse source address: %s\n", prog, optparse_state.optarg);
exit(1);
case 'I':
#ifdef SO_BINDTODEVICE
if (socket4 >= 0) {
if (p_setsockopt(suid, socket4, SOL_SOCKET, SO_BINDTODEVICE, optparse_state.optarg, strlen(optparse_state.optarg))) {
perror("binding to specific interface (SO_BINTODEVICE)");
exit(1);
}
}
#ifdef IPV6
if (socket6 >= 0) {
if (p_setsockopt(suid, socket6, SOL_SOCKET, SO_BINDTODEVICE, optparse_state.optarg, strlen(optparse_state.optarg))) {
perror("binding to specific interface (SO_BINTODEVICE), IPV6");
exit(1);
}
}
#endif
#else
printf("%s: cant bind to a particular net interface since SO_BINDTODEVICE is not supported on your os.\n", prog);
exit(3);
;
#endif
break;
case 'T':
/* This option is ignored for compatibility reasons ("select timeout" is not meaningful anymore) */
break;
case 'O':
if (sscanf(optparse_state.optarg, "%i", &tos) == 1) {
if (socket4 >= 0) {
if (setsockopt(socket4, IPPROTO_IP, IP_TOS, &tos, sizeof(tos))) {
perror("setting type of service octet IP_TOS");
}
}
#if defined(IPV6) && defined(IPV6_TCLASS)
if (socket6 >= 0) {
if (setsockopt(socket6, IPPROTO_IPV6, IPV6_TCLASS, &tos, sizeof(tos))) {
perror("setting type of service octet IPV6_TCLASS");
}
}
#endif
}
else {
usage(1);
}
break;
case 'o':
outage_flag = 1;
break;
case '?':
fprintf(stderr, "%s: %s\n", argv[0], optparse_state.errmsg);
fprintf(stderr, "see 'fping -h' for usage information\n");
exit(1);
break;
}
}
/* permanently drop privileges */
if (suid != getuid() && setuid(getuid())) {
perror("fatal: failed to permanently drop privileges");
/* continuing would be a security hole */
exit(4);
}
/* validate various option settings */
#ifndef IPV6
if (socket4 < 0) {
crash_and_burn("can't create socket (must run as root?)");
}
#else
if ((socket4 < 0 && socket6 < 0) || (hints_ai_family == AF_INET6 && socket6 < 0)) {
crash_and_burn("can't create socket (must run as root?)");
}
#endif
if (ttl > 255) {
fprintf(stderr, "%s: ttl %u out of range\n", prog, ttl);
exit(1);
}
if (unreachable_flag && alive_flag) {
fprintf(stderr, "%s: specify only one of a, u\n", prog);
exit(1);
}
if (count_flag && loop_flag) {
fprintf(stderr, "%s: specify only one of c, l\n", prog);
exit(1);
}
#ifdef FPING_SAFE_LIMITS
if ((interval < (int64_t)MIN_INTERVAL * 1000000 || perhost_interval < (int64_t)MIN_PERHOST_INTERVAL * 1000000)
&& getuid()) {
fprintf(stderr, "%s: these options are too risky for mere mortals.\n", prog);
fprintf(stderr, "%s: You need -i >= %u and -p >= %u\n",
prog, MIN_INTERVAL, MIN_PERHOST_INTERVAL);
exit(1);
}
#endif
if (ping_data_size > MAX_PING_DATA) {
fprintf(stderr, "%s: data size %u not valid, must not be larger than %u\n",
prog, ping_data_size, (unsigned int)MAX_PING_DATA);
exit(1);
}
if ((backoff > MAX_BACKOFF_FACTOR) || (backoff < MIN_BACKOFF_FACTOR)) {
fprintf(stderr, "%s: backoff factor %.1f not valid, must be between %.1f and %.1f\n",
prog, backoff, MIN_BACKOFF_FACTOR, MAX_BACKOFF_FACTOR);
exit(1);
}
if (count_flag) {
if (verbose_flag)
per_recv_flag = 1;
alive_flag = unreachable_flag = verbose_flag = 0;
}
if (loop_flag) {
if (!report_interval)
per_recv_flag = 1;
alive_flag = unreachable_flag = verbose_flag = 0;
}
if (alive_flag || unreachable_flag || min_reachable)
verbose_flag = 0;
trials = (count > retry + 1) ? count : retry + 1;
/* auto-tune default timeout for count/loop modes
* see also github #32 */
if (loop_flag || count_flag) {
if (!timeout_flag) {
timeout = perhost_interval;
if (timeout > (int64_t)AUTOTUNE_TIMEOUT_MAX * 1000000) {
timeout = (int64_t)AUTOTUNE_TIMEOUT_MAX * 1000000;
}
}
}
#if defined(DEBUG) || defined(_DEBUG)