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Add new option -m which allows the user to set IP TTL.

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This commit is contained in:
Ruslan Ermilov 2001-03-09 13:20:23 +00:00
parent ff7405adba
commit 211bfbd228
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=74029
2 changed files with 34 additions and 12 deletions
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6
sbin/ping/ping.8
View File

@ -46,6 +46,7 @@ packets to network hosts
.Op Fl c Ar count
.Op Fl i Ar wait
.Op Fl l Ar preload
.Op Fl m Ar ttl
.Op Fl p Ar pattern
.Op Fl P Ar policy
.Op Fl s Ar packetsize
@ -136,6 +137,11 @@ is specified,
sends that many packets as fast as possible before falling into its normal
mode of behavior.
Only the super-user may use this option.
.It Fl m Ar ttl
Set the IP Time To Live for outgoing packets.
If not specified, the kernel uses the value of the
.Va net.inet.ip.ttl
MIB variable.
.It Fl L
Suppress loopback of multicast packets.
This flag only applies if the ping destination is a multicast address.

40
sbin/ping/ping.c
View File

@ -134,6 +134,7 @@ int options;
#define F_POLICY 0x4000
#endif /*IPSEC_POLICY_IPSEC*/
#endif /*IPSEC*/
#define F_TTL 0x8000
/*
* MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
@ -198,9 +199,9 @@ main(argc, argv)
struct sockaddr_in *to, sin;
struct termios ts;
register int i;
int ch, hold, packlen, preload, sockerrno, almost_done = 0;
int ch, hold, packlen, preload, sockerrno, almost_done = 0, ttl;
struct in_addr ifaddr;
unsigned char ttl, loop;
unsigned char mttl, loop;
u_char *datap, *packet;
char *source = NULL, *target, hnamebuf[MAXHOSTNAMELEN];
char snamebuf[MAXHOSTNAMELEN];
@ -234,13 +235,14 @@ main(argc, argv)
alarmtimeout = preload = 0;
datap = &outpack[8 + PHDR_LEN];
#ifndef IPSEC
while ((ch = getopt(argc, argv, "I:LQRS:T:c:adfi:l:np:qrs:t:v")) != -1)
#else
while ((ch = getopt(argc, argv,
"I:LQRS:T:c:adfi:l:m:np:qrs:t:v"
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
while ((ch = getopt(argc, argv, "I:LQRS:T:c:adfi:l:np:qrs:t:vP:")) != -1)
"P:"
#endif /*IPSEC_POLICY_IPSEC*/
#endif
#endif /*IPSEC*/
)) != -1)
{
switch(ch) {
case 'a':
@ -306,6 +308,14 @@ main(argc, argv)
options |= F_NOLOOP;
loop = 0;
break;
case 'm': /* TTL */
ultmp = strtoul(optarg, &ep, 0);
if (*ep || ep == optarg || ultmp > 255)
errx(EX_USAGE, "invalid TTL: `%s'",
optarg);
ttl = ultmp;
options |= F_TTL;
break;
case 'n':
options |= F_NUMERIC;
break;
@ -357,7 +367,7 @@ main(argc, argv)
if (*ep || ep == optarg || ultmp > 255)
errx(EX_USAGE, "invalid multicast TTL: `%s'",
optarg);
ttl = ultmp;
mttl = ultmp;
options |= F_MTTL;
break;
case 'v':
@ -508,6 +518,12 @@ main(argc, argv)
#endif /* IP_OPTIONS */
}
if (options & F_TTL) {
if (setsockopt(s, IPPROTO_IP, IP_TTL, &ttl,
sizeof(ttl)) < 0) {
err(EX_OSERR, "setsockopt IP_TTL");
}
}
if (options & F_NOLOOP) {
if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop,
sizeof(loop)) < 0) {
@ -515,8 +531,8 @@ main(argc, argv)
}
}
if (options & F_MTTL) {
if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &ttl,
sizeof(ttl)) < 0) {
if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &mttl,
sizeof(mttl)) < 0) {
err(EX_OSERR, "setsockopt IP_MULTICAST_TTL");
}
}
@ -1402,8 +1418,8 @@ static void
usage()
{
fprintf(stderr, "%s\n%s\n%s\n",
"usage: ping [-QRadfnqrv] [-c count] [-i wait] [-l preload] [-p pattern]",
" "
"usage: ping [-QRadfnqrv] [-c count] [-i wait] [-l preload] [-m ttl]",
" [-p pattern] "
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
"[-P policy] "