diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/ping.c | 73 |
1 files changed, 50 insertions, 23 deletions
diff --git a/networking/ping.c b/networking/ping.c index 93b2e02..2991486 100644 --- a/networking/ping.c +++ b/networking/ping.c @@ -224,15 +224,17 @@ int ping_main(int argc ATTRIBUTE_UNUSED, char **argv) /* full(er) version */ -#define OPT_STRING ("qvc:s:I:4" USE_PING6("6")) +#define OPT_STRING ("qvc:s:w:W:I:4" USE_PING6("6")) enum { OPT_QUIET = 1 << 0, OPT_VERBOSE = 1 << 1, OPT_c = 1 << 2, OPT_s = 1 << 3, - OPT_I = 1 << 4, - OPT_IPV4 = 1 << 5, - OPT_IPV6 = (1 << 6) * ENABLE_PING6, + OPT_w = 1 << 4, + OPT_W = 1 << 5, + OPT_I = 1 << 6, + OPT_IPV4 = 1 << 7, + OPT_IPV6 = (1 << 8) * ENABLE_PING6, }; @@ -246,6 +248,9 @@ struct globals { uint16_t myid; unsigned tmin, tmax; /* in us */ unsigned long long tsum; /* in us, sum of all times */ + unsigned deadline; + unsigned timeout; + unsigned total_secs; const char *hostname; const char *dotted; union { @@ -271,6 +276,9 @@ struct globals { #define tmin (G.tmin ) #define tmax (G.tmax ) #define tsum (G.tsum ) +#define deadline (G.deadline ) +#define timeout (G.timeout ) +#define total_secs (G.total_secs ) #define hostname (G.hostname ) #define dotted (G.dotted ) #define pingaddr (G.pingaddr ) @@ -280,6 +288,8 @@ void BUG_ping_globals_too_big(void); if (sizeof(G) > COMMON_BUFSIZE) \ BUG_ping_globals_too_big(); \ pingsock = -1; \ + datalen = DEFDATALEN; \ + timeout = MAXWAIT; \ tmin = UINT_MAX; \ } while (0) @@ -292,7 +302,8 @@ void BUG_ping_globals_too_big(void); /**************************************************************************/ -static void pingstats(int junk ATTRIBUTE_UNUSED) +static void print_stats_and_exit(int junk) ATTRIBUTE_NORETURN; +static void print_stats_and_exit(int junk ATTRIBUTE_UNUSED) { signal(SIGINT, SIG_IGN); @@ -311,7 +322,8 @@ static void pingstats(int junk ATTRIBUTE_UNUSED) tavg / 1000, tavg % 1000, tmax / 1000, tmax % 1000); } - exit(nreceived == 0); /* (nreceived == 0) is true (1) -- 'failure' */ + /* if condition is true, exit with 1 -- 'failure' */ + exit(nreceived == 0 || (deadline && nreceived < pingcount)); } static void sendping_tail(void (*sp)(int), const void *pkt, int size_pkt) @@ -327,13 +339,30 @@ static void sendping_tail(void (*sp)(int), const void *pkt, int size_pkt) if (sz != size_pkt) bb_error_msg_and_die(bb_msg_write_error); - signal(SIGALRM, sp); - if (pingcount == 0 || ntransmitted < pingcount) { /* schedule next in 1s */ + if (pingcount == 0 || deadline || ntransmitted < pingcount) { + /* Didn't send all pings yet - schedule next in 1s */ + signal(SIGALRM, sp); + if (deadline) { + total_secs += PINGINTERVAL; + if (total_secs >= deadline) + signal(SIGALRM, print_stats_and_exit); + } alarm(PINGINTERVAL); - } else { /* done, wait for the last ping to come back */ - /* todo, don't necessarily need to wait so long... */ - signal(SIGALRM, pingstats); - alarm(MAXWAIT); + } else { /* -c NN, and all NN are sent (and no deadline) */ + /* Wait for the last ping to come back. + * -W timeout: wait for a response in seconds. + * Affects only timeout in absense of any responses, + * otherwise ping waits for two RTTs. */ + unsigned expire = timeout; + + if (nreceived) { + /* approx. 2*tmax, in seconds (2 RTT) */ + expire = tmax / (512*1024); + if (expire == 0) + expire = 1; + } + signal(SIGALRM, print_stats_and_exit); + alarm(expire); } } @@ -549,7 +578,7 @@ static void ping4(len_and_sockaddr *lsa) sockopt = 48 * 1024; /* explain why 48k? */ setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt)); - signal(SIGINT, pingstats); + signal(SIGINT, print_stats_and_exit); /* start the ping's going ... */ sendping4(0); @@ -568,7 +597,7 @@ static void ping4(len_and_sockaddr *lsa) continue; } unpack4(packet, c, &from); - if (pingcount > 0 && nreceived >= pingcount) + if (pingcount && nreceived >= pingcount) break; } } @@ -624,7 +653,7 @@ static void ping6(len_and_sockaddr *lsa) if (if_index) pingaddr.sin6.sin6_scope_id = if_index; - signal(SIGINT, pingstats); + signal(SIGINT, print_stats_and_exit); /* start the ping's going ... */ sendping6(0); @@ -659,7 +688,7 @@ static void ping6(len_and_sockaddr *lsa) } } unpack6(packet, c, /*&from,*/ hoplimit); - if (pingcount > 0 && nreceived >= pingcount) + if (pingcount && nreceived >= pingcount) break; } } @@ -691,11 +720,9 @@ int ping_main(int argc ATTRIBUTE_UNUSED, char **argv) INIT_G(); - datalen = DEFDATALEN; - - /* exactly one argument needed, -v and -q don't mix */ - opt_complementary = "=1:q--v:v--q"; - getopt32(argv, OPT_STRING, &opt_c, &opt_s, &opt_I); + /* exactly one argument needed; -v and -q don't mix; -w NUM, -W NUM */ + opt_complementary = "=1:q--v:v--q:w+:W+"; + getopt32(argv, OPT_STRING, &opt_c, &opt_s, &deadline, &timeout, &opt_I); if (option_mask32 & OPT_c) pingcount = xatoul(opt_c); // -c if (option_mask32 & OPT_s) @@ -726,8 +753,8 @@ int ping_main(int argc ATTRIBUTE_UNUSED, char **argv) dotted = xmalloc_sockaddr2dotted_noport(&lsa->u.sa); ping(lsa); - pingstats(0); - return EXIT_SUCCESS; + print_stats_and_exit(0); + /*return EXIT_SUCCESS;*/ } #endif /* FEATURE_FANCY_PING */ |