X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fping.c;h=3df67f5c39845125339ce54daf05abf9423b4735;hb=a8816dafc4b274b17c58df88cabdbf9e2b47f528;hp=c7b6cbe9a75bf73ff2f0c26c9486d33174de92e0;hpb=85164fa06eac734dd853b7e08c1762ada06e9a2c;p=oweals%2Fbusybox.git diff --git a/networking/ping.c b/networking/ping.c index c7b6cbe9a..3df67f5c3 100644 --- a/networking/ping.c +++ b/networking/ping.c @@ -11,7 +11,7 @@ * This code is derived from software contributed to Berkeley by * Mike Muuss. * - * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ /* from ping6.c: * Copyright (C) 1999 by Randolph Chung @@ -29,6 +29,107 @@ #include #include "libbb.h" +#ifdef __BIONIC__ +/* should be in netinet/ip_icmp.h */ +# define ICMP_DEST_UNREACH 3 /* Destination Unreachable */ +# define ICMP_SOURCE_QUENCH 4 /* Source Quench */ +# define ICMP_REDIRECT 5 /* Redirect (change route) */ +# define ICMP_ECHO 8 /* Echo Request */ +# define ICMP_TIME_EXCEEDED 11 /* Time Exceeded */ +# define ICMP_PARAMETERPROB 12 /* Parameter Problem */ +# define ICMP_TIMESTAMP 13 /* Timestamp Request */ +# define ICMP_TIMESTAMPREPLY 14 /* Timestamp Reply */ +# define ICMP_INFO_REQUEST 15 /* Information Request */ +# define ICMP_INFO_REPLY 16 /* Information Reply */ +# define ICMP_ADDRESS 17 /* Address Mask Request */ +# define ICMP_ADDRESSREPLY 18 /* Address Mask Reply */ +#endif + +//config:config PING +//config: bool "ping" +//config: default y +//config: select PLATFORM_LINUX +//config: help +//config: ping uses the ICMP protocol's mandatory ECHO_REQUEST datagram to +//config: elicit an ICMP ECHO_RESPONSE from a host or gateway. +//config: +//config:config PING6 +//config: bool "ping6" +//config: default y +//config: depends on FEATURE_IPV6 && PING +//config: help +//config: This will give you a ping that can talk IPv6. +//config: +//config:config FEATURE_FANCY_PING +//config: bool "Enable fancy ping output" +//config: default y +//config: depends on PING +//config: help +//config: Make the output from the ping applet include statistics, and at the +//config: same time provide full support for ICMP packets. + +/* Needs socket(AF_INET, SOCK_RAW, IPPROTO_ICMP), therefore BB_SUID_MAYBE: */ +//applet:IF_PING(APPLET(ping, BB_DIR_BIN, BB_SUID_MAYBE)) +//applet:IF_PING6(APPLET(ping6, BB_DIR_BIN, BB_SUID_MAYBE)) + +//kbuild:lib-$(CONFIG_PING) += ping.o +//kbuild:lib-$(CONFIG_PING6) += ping.o + +//usage:#if !ENABLE_FEATURE_FANCY_PING +//usage:# define ping_trivial_usage +//usage: "HOST" +//usage:# define ping_full_usage "\n\n" +//usage: "Send ICMP ECHO_REQUEST packets to network hosts" +//usage:# define ping6_trivial_usage +//usage: "HOST" +//usage:# define ping6_full_usage "\n\n" +//usage: "Send ICMP ECHO_REQUEST packets to network hosts" +//usage:#else +//usage:# define ping_trivial_usage +//usage: "[OPTIONS] HOST" +//usage:# define ping_full_usage "\n\n" +//usage: "Send ICMP ECHO_REQUEST packets to network hosts\n" +//usage: "\n -4,-6 Force IP or IPv6 name resolution" +//usage: "\n -c CNT Send only CNT pings" +//usage: "\n -s SIZE Send SIZE data bytes in packets (default:56)" +//usage: "\n -t TTL Set TTL" +//usage: "\n -I IFACE/IP Use interface or IP address as source" +//usage: "\n -W SEC Seconds to wait for the first response (default:10)" +//usage: "\n (after all -c CNT packets are sent)" +//usage: "\n -w SEC Seconds until ping exits (default:infinite)" +//usage: "\n (can exit earlier with -c CNT)" +//usage: "\n -q Quiet, only displays output at start" +//usage: "\n and when finished" +//usage: +//usage:# define ping6_trivial_usage +//usage: "[OPTIONS] HOST" +//usage:# define ping6_full_usage "\n\n" +//usage: "Send ICMP ECHO_REQUEST packets to network hosts\n" +//usage: "\n -c CNT Send only CNT pings" +//usage: "\n -s SIZE Send SIZE data bytes in packets (default:56)" +//usage: "\n -I IFACE/IP Use interface or IP address as source" +//usage: "\n -q Quiet, only displays output at start" +//usage: "\n and when finished" +//usage: +//usage:#endif +//usage: +//usage:#define ping_example_usage +//usage: "$ ping localhost\n" +//usage: "PING slag (127.0.0.1): 56 data bytes\n" +//usage: "64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms\n" +//usage: "\n" +//usage: "--- debian ping statistics ---\n" +//usage: "1 packets transmitted, 1 packets received, 0% packet loss\n" +//usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n" +//usage:#define ping6_example_usage +//usage: "$ ping6 ip6-localhost\n" +//usage: "PING ip6-localhost (::1): 56 data bytes\n" +//usage: "64 bytes from ::1: icmp6_seq=0 ttl=64 time=20.1 ms\n" +//usage: "\n" +//usage: "--- ip6-localhost ping statistics ---\n" +//usage: "1 packets transmitted, 1 packets received, 0% packet loss\n" +//usage: "round-trip min/avg/max = 20.1/20.1/20.1 ms\n" + #if ENABLE_PING6 # include /* I see RENUMBERED constants in bits/in.h - !!? @@ -43,73 +144,48 @@ enum { DEFDATALEN = 56, MAXIPLEN = 60, MAXICMPLEN = 76, - MAXPACKET = 65468, MAX_DUP_CHK = (8 * 128), MAXWAIT = 10, PINGINTERVAL = 1, /* 1 second */ }; -/* common routines */ - -static int in_cksum(unsigned short *buf, int sz) -{ - int nleft = sz; - int sum = 0; - unsigned short *w = buf; - unsigned short ans = 0; - - while (nleft > 1) { - sum += *w++; - nleft -= 2; - } - - if (nleft == 1) { - *(unsigned char *) (&ans) = *(unsigned char *) w; - sum += ans; - } - - sum = (sum >> 16) + (sum & 0xFFFF); - sum += (sum >> 16); - ans = ~sum; - return ans; -} - #if !ENABLE_FEATURE_FANCY_PING -/* simple version */ +/* Simple version */ -static char *hostname; +struct globals { + char *hostname; + char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN]; +} FIX_ALIASING; +#define G (*(struct globals*)&bb_common_bufsiz1) +#define INIT_G() do { } while (0) static void noresp(int ign UNUSED_PARAM) { - printf("No response from %s\n", hostname); + printf("No response from %s\n", G.hostname); exit(EXIT_FAILURE); } static void ping4(len_and_sockaddr *lsa) { - struct sockaddr_in pingaddr; struct icmp *pkt; int pingsock, c; - char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN]; pingsock = create_icmp_socket(); - pingaddr = lsa->u.sin; - pkt = (struct icmp *) packet; - memset(pkt, 0, sizeof(packet)); + pkt = (struct icmp *) G.packet; + memset(pkt, 0, sizeof(G.packet)); pkt->icmp_type = ICMP_ECHO; - pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet)); + pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, sizeof(G.packet)); - c = xsendto(pingsock, packet, DEFDATALEN + ICMP_MINLEN, - (struct sockaddr *) &pingaddr, sizeof(pingaddr)); + xsendto(pingsock, G.packet, DEFDATALEN + ICMP_MINLEN, &lsa->u.sa, lsa->len); /* listen for replies */ while (1) { struct sockaddr_in from; socklen_t fromlen = sizeof(from); - c = recvfrom(pingsock, packet, sizeof(packet), 0, + c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0, (struct sockaddr *) &from, &fromlen); if (c < 0) { if (errno != EINTR) @@ -117,9 +193,9 @@ static void ping4(len_and_sockaddr *lsa) continue; } if (c >= 76) { /* ip + icmp */ - struct iphdr *iphdr = (struct iphdr *) packet; + struct iphdr *iphdr = (struct iphdr *) G.packet; - pkt = (struct icmp *) (packet + (iphdr->ihl << 2)); /* skip ip hdr */ + pkt = (struct icmp *) (G.packet + (iphdr->ihl << 2)); /* skip ip hdr */ if (pkt->icmp_type == ICMP_ECHOREPLY) break; } @@ -131,39 +207,35 @@ static void ping4(len_and_sockaddr *lsa) #if ENABLE_PING6 static void ping6(len_and_sockaddr *lsa) { - struct sockaddr_in6 pingaddr; struct icmp6_hdr *pkt; int pingsock, c; int sockopt; - char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN]; pingsock = create_icmp6_socket(); - pingaddr = lsa->u.sin6; - pkt = (struct icmp6_hdr *) packet; - memset(pkt, 0, sizeof(packet)); + pkt = (struct icmp6_hdr *) G.packet; + memset(pkt, 0, sizeof(G.packet)); pkt->icmp6_type = ICMP6_ECHO_REQUEST; sockopt = offsetof(struct icmp6_hdr, icmp6_cksum); setsockopt(pingsock, SOL_RAW, IPV6_CHECKSUM, &sockopt, sizeof(sockopt)); - c = xsendto(pingsock, packet, DEFDATALEN + sizeof (struct icmp6_hdr), - (struct sockaddr *) &pingaddr, sizeof(pingaddr)); + xsendto(pingsock, G.packet, DEFDATALEN + sizeof(struct icmp6_hdr), &lsa->u.sa, lsa->len); /* listen for replies */ while (1) { struct sockaddr_in6 from; socklen_t fromlen = sizeof(from); - c = recvfrom(pingsock, packet, sizeof(packet), 0, + c = recvfrom(pingsock, G.packet, sizeof(G.packet), 0, (struct sockaddr *) &from, &fromlen); if (c < 0) { if (errno != EINTR) bb_perror_msg("recvfrom"); continue; } - if (c >= 8) { /* icmp6_hdr */ - pkt = (struct icmp6_hdr *) packet; + if (c >= ICMP_MINLEN) { /* icmp6_hdr */ + pkt = (struct icmp6_hdr *) G.packet; if (pkt->icmp6_type == ICMP6_ECHO_REPLY) break; } @@ -180,6 +252,8 @@ static int common_ping_main(sa_family_t af, char **argv) { len_and_sockaddr *lsa; + INIT_G(); + #if ENABLE_PING6 while ((++argv)[0] && argv[0][0] == '-') { if (argv[0][1] == '4') { @@ -196,14 +270,14 @@ static int common_ping_main(sa_family_t af, char **argv) argv++; #endif - hostname = *argv; - if (!hostname) + G.hostname = *argv; + if (!G.hostname) bb_show_usage(); #if ENABLE_PING6 - lsa = xhost_and_af2sockaddr(hostname, 0, af); + lsa = xhost_and_af2sockaddr(G.hostname, 0, af); #else - lsa = xhost_and_af2sockaddr(hostname, 0, AF_INET); + lsa = xhost_and_af2sockaddr(G.hostname, 0, AF_INET); #endif /* Set timer _after_ DNS resolution */ signal(SIGALRM, noresp); @@ -215,7 +289,7 @@ static int common_ping_main(sa_family_t af, char **argv) else #endif ping4(lsa); - printf("%s is alive!\n", hostname); + printf("%s is alive!\n", G.hostname); return EXIT_SUCCESS; } @@ -223,19 +297,20 @@ static int common_ping_main(sa_family_t af, char **argv) #else /* FEATURE_FANCY_PING */ -/* full(er) version */ +/* Full(er) version */ -#define OPT_STRING ("qvc:s:w:W:I:4" IF_PING6("6")) +#define OPT_STRING ("qvc:s:t:w:W:I:4" IF_PING6("6")) enum { OPT_QUIET = 1 << 0, OPT_VERBOSE = 1 << 1, OPT_c = 1 << 2, OPT_s = 1 << 3, - OPT_w = 1 << 4, - OPT_W = 1 << 5, - OPT_I = 1 << 6, - OPT_IPV4 = 1 << 7, - OPT_IPV6 = (1 << 8) * ENABLE_PING6, + OPT_t = 1 << 4, + OPT_w = 1 << 5, + OPT_W = 1 << 6, + OPT_I = 1 << 7, + OPT_IPV4 = 1 << 8, + OPT_IPV6 = (1 << 9) * ENABLE_PING6, }; @@ -246,6 +321,7 @@ struct globals { len_and_sockaddr *source_lsa; unsigned datalen; unsigned pingcount; /* must be int-sized */ + unsigned opt_ttl; unsigned long ntransmitted, nreceived, nrepeats; uint16_t myid; unsigned tmin, tmax; /* in us */ @@ -253,6 +329,9 @@ struct globals { unsigned deadline; unsigned timeout; unsigned total_secs; + unsigned sizeof_rcv_packet; + char *rcv_packet; /* [datalen + MAXIPLEN + MAXICMPLEN] */ + void *snd_packet; /* [datalen + ipv4/ipv6_const] */ const char *hostname; const char *dotted; union { @@ -263,7 +342,7 @@ struct globals { #endif } pingaddr; char rcvd_tbl[MAX_DUP_CHK / 8]; -}; +} FIX_ALIASING; #define G (*(struct globals*)&bb_common_bufsiz1) #define pingsock (G.pingsock ) #define if_index (G.if_index ) @@ -274,6 +353,7 @@ struct globals { #define nreceived (G.nreceived ) #define nrepeats (G.nrepeats ) #define pingcount (G.pingcount ) +#define opt_ttl (G.opt_ttl ) #define myid (G.myid ) #define tmin (G.tmin ) #define tmax (G.tmax ) @@ -296,11 +376,11 @@ void BUG_ping_globals_too_big(void); } while (0) -#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ -#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ -#define SET(bit) (A(bit) |= B(bit)) -#define CLR(bit) (A(bit) &= (~B(bit))) -#define TST(bit) (A(bit) & B(bit)) +#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ +#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ +#define SET(bit) (A(bit) |= B(bit)) +#define CLR(bit) (A(bit) &= (~B(bit))) +#define TST(bit) (A(bit) & B(bit)) /**************************************************************************/ @@ -328,16 +408,18 @@ static void print_stats_and_exit(int junk UNUSED_PARAM) exit(nreceived == 0 || (deadline && nreceived < pingcount)); } -static void sendping_tail(void (*sp)(int), const void *pkt, int size_pkt) +static void sendping_tail(void (*sp)(int), int size_pkt) { int sz; CLR((uint16_t)ntransmitted % MAX_DUP_CHK); ntransmitted++; + size_pkt += datalen; + /* sizeof(pingaddr) can be larger than real sa size, but I think * it doesn't matter */ - sz = xsendto(pingsock, pkt, size_pkt, &pingaddr.sa, sizeof(pingaddr)); + sz = xsendto(pingsock, G.snd_packet, size_pkt, &pingaddr.sa, sizeof(pingaddr)); if (sz != size_pkt) bb_error_msg_and_die(bb_msg_write_error); @@ -370,31 +452,32 @@ static void sendping_tail(void (*sp)(int), const void *pkt, int size_pkt) static void sendping4(int junk UNUSED_PARAM) { - /* +4 reserves a place for timestamp, which may end up sitting - * *after* packet. Saves one if() */ - struct icmp *pkt = alloca(datalen + ICMP_MINLEN + 4); + struct icmp *pkt = G.snd_packet; - memset(pkt, 0, datalen + ICMP_MINLEN + 4); + //memset(pkt, 0, datalen + ICMP_MINLEN + 4); - G.snd_packet was xzalloced pkt->icmp_type = ICMP_ECHO; /*pkt->icmp_code = 0;*/ - /*pkt->icmp_cksum = 0;*/ + pkt->icmp_cksum = 0; /* cksum is calculated with this field set to 0 */ pkt->icmp_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */ pkt->icmp_id = myid; - /* We don't do hton, because we will read it back on the same machine */ + /* If datalen < 4, we store timestamp _past_ the packet, + * but it's ok - we allocated 4 extra bytes in xzalloc() just in case. + */ /*if (datalen >= 4)*/ + /* No hton: we'll read it back on the same machine */ *(uint32_t*)&pkt->icmp_dun = monotonic_us(); - pkt->icmp_cksum = in_cksum((unsigned short *) pkt, datalen + ICMP_MINLEN); + pkt->icmp_cksum = inet_cksum((uint16_t *) pkt, datalen + ICMP_MINLEN); - sendping_tail(sendping4, pkt, datalen + ICMP_MINLEN); + sendping_tail(sendping4, ICMP_MINLEN); } #if ENABLE_PING6 static void sendping6(int junk UNUSED_PARAM) { - struct icmp6_hdr *pkt = alloca(datalen + sizeof(struct icmp6_hdr) + 4); + struct icmp6_hdr *pkt = G.snd_packet; - memset(pkt, 0, datalen + sizeof(struct icmp6_hdr) + 4); + //memset(pkt, 0, datalen + sizeof(struct icmp6_hdr) + 4); pkt->icmp6_type = ICMP6_ECHO_REQUEST; /*pkt->icmp6_code = 0;*/ /*pkt->icmp6_cksum = 0;*/ @@ -404,7 +487,9 @@ static void sendping6(int junk UNUSED_PARAM) /*if (datalen >= 4)*/ *(uint32_t*)(&pkt->icmp6_data8[4]) = monotonic_us(); - sendping_tail(sendping6, pkt, datalen + sizeof(struct icmp6_hdr)); + //TODO? pkt->icmp_cksum = inet_cksum(...); + + sendping_tail(sendping6, sizeof(struct icmp6_hdr)); } #endif @@ -528,7 +613,7 @@ static void unpack4(char *buf, int sz, struct sockaddr_in *from) } } #if ENABLE_PING6 -static void unpack6(char *packet, int sz, /*struct sockaddr_in6 *from,*/ int hoplimit) +static void unpack6(char *packet, int sz, struct sockaddr_in6 *from, int hoplimit) { struct icmp6_hdr *icmppkt; char buf[INET6_ADDRSTRLEN]; @@ -548,7 +633,7 @@ static void unpack6(char *packet, int sz, /*struct sockaddr_in6 *from,*/ int hop if (sz >= sizeof(struct icmp6_hdr) + sizeof(uint32_t)) tp = (uint32_t *) &icmppkt->icmp6_data8[4]; unpack_tail(sz, tp, - inet_ntop(AF_INET6, &pingaddr.sin6.sin6_addr, + inet_ntop(AF_INET6, &from->sin6_addr, buf, sizeof(buf)), recv_seq, hoplimit); } else if (icmppkt->icmp6_type != ICMP6_ECHO_REQUEST) { @@ -561,7 +646,6 @@ static void unpack6(char *packet, int sz, /*struct sockaddr_in6 *from,*/ int hop static void ping4(len_and_sockaddr *lsa) { - char packet[datalen + MAXIPLEN + MAXICMPLEN]; int sockopt; pingsock = create_icmp_socket(); @@ -583,6 +667,12 @@ static void ping4(len_and_sockaddr *lsa) sockopt = (datalen * 2) + 7 * 1024; /* giving it a bit of extra room */ setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, &sockopt, sizeof(sockopt)); + if (opt_ttl != 0) { + setsockopt(pingsock, IPPROTO_IP, IP_TTL, &opt_ttl, sizeof(opt_ttl)); + /* above doesnt affect packets sent to bcast IP, so... */ + setsockopt(pingsock, IPPROTO_IP, IP_MULTICAST_TTL, &opt_ttl, sizeof(opt_ttl)); + } + signal(SIGINT, print_stats_and_exit); /* start the ping's going ... */ @@ -594,14 +684,14 @@ static void ping4(len_and_sockaddr *lsa) socklen_t fromlen = (socklen_t) sizeof(from); int c; - c = recvfrom(pingsock, packet, sizeof(packet), 0, + c = recvfrom(pingsock, G.rcv_packet, G.sizeof_rcv_packet, 0, (struct sockaddr *) &from, &fromlen); if (c < 0) { if (errno != EINTR) bb_perror_msg("recvfrom"); continue; } - unpack4(packet, c, &from); + unpack4(G.rcv_packet, c, &from); if (pingcount && nreceived >= pingcount) break; } @@ -610,7 +700,6 @@ static void ping4(len_and_sockaddr *lsa) extern int BUG_bad_offsetof_icmp6_cksum(void); static void ping6(len_and_sockaddr *lsa) { - char packet[datalen + MAXIPLEN + MAXICMPLEN]; int sockopt; struct msghdr msg; struct sockaddr_in6 from; @@ -635,7 +724,7 @@ static void ping6(len_and_sockaddr *lsa) ICMP6_FILTER_SETPASSALL(&filt); } if (setsockopt(pingsock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, - sizeof(filt)) < 0) + sizeof(filt)) < 0) bb_error_msg_and_die("setsockopt(ICMP6_FILTER)"); } #endif /*ICMP6_FILTER*/ @@ -670,8 +759,8 @@ static void ping6(len_and_sockaddr *lsa) msg.msg_iov = &iov; msg.msg_iovlen = 1; msg.msg_control = control_buf; - iov.iov_base = packet; - iov.iov_len = sizeof(packet); + iov.iov_base = G.rcv_packet; + iov.iov_len = G.sizeof_rcv_packet; while (1) { int c; struct cmsghdr *mp; @@ -690,10 +779,11 @@ static void ping6(len_and_sockaddr *lsa) /* don't check len - we trust the kernel: */ /* && mp->cmsg_len >= CMSG_LEN(sizeof(int)) */ ) { - hoplimit = *(int*)CMSG_DATA(mp); + /*hoplimit = *(int*)CMSG_DATA(mp); - unaligned access */ + move_from_unaligned_int(hoplimit, CMSG_DATA(mp)); } } - unpack6(packet, c, /*&from,*/ hoplimit); + unpack6(G.rcv_packet, c, &from, hoplimit); if (pingcount && nreceived >= pingcount) break; } @@ -709,12 +799,20 @@ static void ping(len_and_sockaddr *lsa) } printf(": %d data bytes\n", datalen); + G.sizeof_rcv_packet = datalen + MAXIPLEN + MAXICMPLEN; + G.rcv_packet = xzalloc(G.sizeof_rcv_packet); #if ENABLE_PING6 - if (lsa->u.sa.sa_family == AF_INET6) + if (lsa->u.sa.sa_family == AF_INET6) { + /* +4 reserves a place for timestamp, which may end up sitting + * _after_ packet. Saves one if() - see sendping4/6() */ + G.snd_packet = xzalloc(datalen + sizeof(struct icmp6_hdr) + 4); ping6(lsa); - else + } else #endif + { + G.snd_packet = xzalloc(datalen + ICMP_MINLEN + 4); ping4(lsa); + } } static int common_ping_main(int opt, char **argv) @@ -724,9 +822,9 @@ static int common_ping_main(int opt, char **argv) INIT_G(); - /* exactly one argument needed; -v and -q don't mix; -c NUM, -w NUM, -W NUM */ - opt_complementary = "=1:q--v:v--q:c+:w+:W+"; - opt |= getopt32(argv, OPT_STRING, &pingcount, &str_s, &deadline, &timeout, &str_I); + /* exactly one argument needed; -v and -q don't mix; -c NUM, -t NUM, -w NUM, -W NUM */ + opt_complementary = "=1:q--v:v--q:c+:t+:w+:W+"; + opt |= getopt32(argv, OPT_STRING, &pingcount, &str_s, &opt_ttl, &deadline, &timeout, &str_I); if (opt & OPT_s) datalen = xatou16(str_s); // -s if (opt & OPT_I) { // -I