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iodine: add usage for -4 and -6 command line arguments 

Those arguments were introduced, but not documented.

Fixes: 619ede5d ("Add options to force IP version for client DNS traffic")
Signed-off-by: Ralf Ramsauer <ralf@ramses-pyramidenbau.de>
This commit is contained in:
Ralf Ramsauer 2017-03-11 02:19:03 -08:00
parent 5fd0874aba
commit 84ded018cf
1 changed files with 3 additions and 1 deletions
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src/iodine.c
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@ -71,7 +71,7 @@ static inline void help(bool verbose) __attribute__((noreturn));
static void
help(bool verbose) {
fprintf(stderr, "iodine IP over DNS tunneling client\n\n"
"Usage: %s [-fhrv] [-u user] [-t chrootdir] [-d device] [-P password]\n"
"Usage: %s [-46fhrv] [-u user] [-t chrootdir] [-d device] [-P password]\n"
" [-m maxfragsize] [-M maxlen] [-T type] [-O enc] [-L 0|1] [-I sec]\n"
" [-z context] [-F pidfile] [nameserver] topdomain\n", __progname);
@ -79,6 +79,8 @@ help(bool verbose) {
exit(2);
fprintf(stderr, "\nOptions to try if connection doesn't work:\n"
" -4 to connect only to IPv4\n"
" -6 to connect only to IPv6\n"
" -T force dns type: NULL, PRIVATE, TXT, SRV, MX, CNAME, A (default: autodetect)\n"
" -O force downstream encoding for -T other than NULL: Base32, Base64, Base64u,\n"
" Base128, or (only for TXT:) Raw (default: autodetect)\n"