diff options
| -rw-r--r-- | networking/ntpd.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/networking/ntpd.c b/networking/ntpd.c index 59607ed23..cfe695631 100644 --- a/networking/ntpd.c +++ b/networking/ntpd.c @@ -29,7 +29,7 @@ */ //usage:#define ntpd_trivial_usage -//usage: "[-dnqNw"IF_FEATURE_NTPD_SERVER("l")"] [-S PROG] [-p PEER]..." +//usage: "[-dnqNw"IF_FEATURE_NTPD_SERVER("l -I IFACE")"] [-S PROG] [-p PEER]..." //usage:#define ntpd_full_usage "\n\n" //usage: "NTP client/server\n" //usage: "\n -d Verbose" @@ -39,6 +39,7 @@ //usage: "\n -w Do not set time (only query peers), implies -n" //usage: IF_FEATURE_NTPD_SERVER( //usage: "\n -l Run as server on port 123" +//usage: "\n -I IFACE Bind server to IFACE, implies -l" //usage: ) //usage: "\n -S PROG Run PROG after stepping time, stratum change, and every 11 mins" //usage: "\n -p PEER Obtain time from PEER (may be repeated)" @@ -283,6 +284,7 @@ enum { OPT_p = (1 << 5), OPT_S = (1 << 6), OPT_l = (1 << 7) * ENABLE_FEATURE_NTPD_SERVER, + OPT_I = (1 << 8) * ENABLE_FEATURE_NTPD_SERVER, /* We hijack some bits for other purposes */ OPT_qq = (1 << 31), }; @@ -301,6 +303,7 @@ struct globals { llist_t *ntp_peers; #if ENABLE_FEATURE_NTPD_SERVER int listen_fd; + char *if_name; # define G_listen_fd (G.listen_fd) #else # define G_listen_fd (-1) @@ -2092,13 +2095,19 @@ static NOINLINE void ntp_init(char **argv) /* Parse options */ peers = NULL; - opt_complementary = "dd:p::wn"; /* d: counter; p: list; -w implies -n */ + opt_complementary = "dd:p::wn" /* -d: counter; -p: list; -w implies -n */ + IF_FEATURE_NTPD_SERVER(":Il"); /* -I implies -l */ opts = getopt32(argv, "nqNx" /* compat */ "wp:S:"IF_FEATURE_NTPD_SERVER("l") /* NOT compat */ + IF_FEATURE_NTPD_SERVER("I:") /* compat */ "d" /* compat */ "46aAbgL", /* compat, ignored */ - &peers, &G.script_name, &G.verbose); + &peers,&G.script_name, +#if ENABLE_FEATURE_NTPD_SERVER + &G.if_name, +#endif + &G.verbose); // if (opts & OPT_x) /* disable stepping, only slew is allowed */ // G.time_was_stepped = 1; @@ -2130,18 +2139,22 @@ static NOINLINE void ntp_init(char **argv) /* -l but no peers: "stratum 1 server" mode */ G.stratum = 1; } - if (!(opts & OPT_n)) { - bb_daemonize_or_rexec(DAEMON_DEVNULL_STDIO, argv); - logmode = LOGMODE_NONE; - } #if ENABLE_FEATURE_NTPD_SERVER G_listen_fd = -1; if (opts & OPT_l) { G_listen_fd = create_and_bind_dgram_or_die(NULL, 123); + if (opts & OPT_I) { + if (setsockopt_bindtodevice(G_listen_fd, G.if_name)) + xfunc_die(); + } socket_want_pktinfo(G_listen_fd); setsockopt(G_listen_fd, IPPROTO_IP, IP_TOS, &const_IPTOS_LOWDELAY, sizeof(const_IPTOS_LOWDELAY)); } #endif + if (!(opts & OPT_n)) { + bb_daemonize_or_rexec(DAEMON_DEVNULL_STDIO, argv); + logmode = LOGMODE_NONE; + } /* I hesitate to set -20 prio. -15 should be high enough for timekeeping */ if (opts & OPT_N) setpriority(PRIO_PROCESS, 0, -15); |