diff options
Diffstat (limited to 'toys/pending/ping.c')
| -rw-r--r-- | toys/pending/ping.c | 278 |
1 files changed, 0 insertions, 278 deletions
diff --git a/toys/pending/ping.c b/toys/pending/ping.c deleted file mode 100644 index 22c571b3..00000000 --- a/toys/pending/ping.c +++ /dev/null @@ -1,278 +0,0 @@ -/* ping.c - check network connectivity - * - * Copyright 2014 Rob Landley <rob@landley.net> - * - * Not in SUSv4. - * - * Note: ping_group_range should never have existed. To disable it, do: - * echo 0 $(((1<<31)-1)) > /proc/sys/net/ipv4/ping_group_range - * (Android does this by default in its init script.) - * - * Yes, I wimped out and capped -s at sizeof(toybuf), waiting for a complaint... - -// -s > 4088 = sizeof(toybuf)-sizeof(struct icmphdr), then kernel adds 20 bytes -USE_PING(NEWTOY(ping, "<1>1t#<0>255=64c#<0=3s#<0>4088=56I:i:W#<0=10w#<0qf46[-46]", TOYFLAG_USR|TOYFLAG_BIN)) - -config PING - bool "ping" - default n - help - usage: ping [OPTIONS] HOST - - Check network connectivity by sending packets to a host and reporting - its response. - - Send ICMP ECHO_REQUEST packets to ipv4 or ipv6 addresses and prints each - echo it receives back, with round trip time. Returns true if host alive. - - Options: - -4, -6 Force IPv4 or IPv6 - -c CNT Send CNT many packets (default 3, 0 = infinite) - -f Flood (print . and \b to show drops, default -c 15 -i 0.2) - -i TIME Interval between packets (default 1, need root for < .2) - -I IFACE/IP Source interface or address - -q Quiet (stops after one returns true if host is alive) - -s SIZE Data SIZE in bytes (default 56) - -t TTL Set Time To Live (number of hops) - -W SEC Seconds to wait for response after -c (default 10) - -w SEC Exit after this many seconds -*/ - -#define FOR_ping -#include "toys.h" - -#include <ifaddrs.h> -#include <netinet/ip_icmp.h> - -GLOBALS( - long w; - long W; - char *i; - char *I; - long s; - long c; - long t; - - struct sockaddr *sa; - int sock; - long i_ms; - unsigned long sent, recv, fugit, min, max; -) - -static void xsendto(int sockfd, void *buf, size_t len, struct sockaddr *dest) -{ - int rc = sendto(TT.sock, buf, len, 0, dest, - dest->sa_family == AF_INET ? sizeof(struct sockaddr_in) : - sizeof(struct sockaddr_in6)); - - if (rc != len) perror_exit("sendto"); -} - -static void summary(int sig) -{ - if (!(toys.optflags&FLAG_q) && TT.sent && TT.sa) { - printf("\n--- %s ping statistics ---\n", ntop(TT.sa)); - printf("%lu packets transmitted, %lu received, %ld%% packet loss\n", - TT.sent, TT.recv, ((TT.sent-TT.recv)*100)/TT.sent); - printf("round-trip min/avg/max = %lu/%lu/%lu ms\n", - TT.min, TT.max, TT.fugit/TT.recv); - } - TT.sa = 0; -} - -// assumes aligned and can read even number of bytes -static unsigned short pingchksum(unsigned short *data, int len) -{ - unsigned short u = 0, d; - - // circular carry is endian independent: bits from high byte go to low byte - while (len>0) { - d = *data++; - if (len == 1) d &= 255<<IS_BIG_ENDIAN; - if (d >= (u += d)) u++; - len -= 2; - } - - return u; -} - -void ping_main(void) -{ - struct addrinfo *ai, *ai2; - struct ifaddrs *ifa, *ifa2 = 0; - union { - struct sockaddr_in in; - struct sockaddr_in6 in6; - } src_addr, src_addr2; - struct sockaddr *sa = (void *)&src_addr, *sa2 = (void *)&src_addr2; - struct pollfd pfd; - int family = 0, len; - long long tnext, tW, tnow, tw; - unsigned short seq = 0, pkttime; - struct icmphdr *ih = (void *)toybuf; - - // Interval - if (TT.i) { - long frac; - - TT.i_ms = xparsetime(TT.i, 1000, &frac) * 1000; - TT.i_ms += frac; - if (TT.i_ms<200 && getuid()) error_exit("need root for -i <200"); - } else TT.i_ms = (toys.optflags&FLAG_f) ? 200 : 1000; - if (!(toys.optflags&FLAG_s)) TT.s = 56; // 64-PHDR_LEN - if ((toys.optflags&(FLAG_f|FLAG_c)) == FLAG_f) TT.c = 15; - - // ipv4 or ipv6? (0 = autodetect if -I or arg have only one address type.) - if (toys.optflags&FLAG_6) family = AF_INET6; - else if (toys.optflags&FLAG_4) family = AF_INET; - else family = 0; - - sigatexit(summary); - - // If -I src_addr look it up. Allow numeric address of correct type. - memset(&src_addr, 0, sizeof(src_addr)); - if (TT.I) { - if (!(toys.optflags&FLAG_6) && inet_pton(AF_INET, TT.I, - (void *)&src_addr.in.sin_addr)) - family = AF_INET; - else if (!(toys.optflags&FLAG_4) && inet_pton(AF_INET6, TT.I, - (void *)&src_addr.in6.sin6_addr)) - family = AF_INET6; - else if (getifaddrs(&ifa2)) perror_exit("getifaddrs"); - } - - // Look up HOST address, filtering for correct type and interface. - // If -I but no -46 then find compatible type between -I and HOST - ai2 = xgetaddrinfo(*toys.optargs, 0, family, 0, 0, 0); - for (ai = ai2; ai; ai = ai->ai_next) { - - // correct type? - if (family && family!=ai->ai_family) continue; - if (ai->ai_family!=AF_INET && ai->ai_family!=AF_INET6) continue; - - // correct interface? - if (!TT.I || !ifa2) break; - for (ifa = ifa2; ifa; ifa = ifa->ifa_next) { - if (!ifa->ifa_addr || ifa->ifa_addr->sa_family!=ai->ai_family - || strcmp(ifa->ifa_name, TT.I)) continue; - sa = (void *)ifa->ifa_addr; - - break; - } - if (ifa) break; - } - - if (!ai) - error_exit("no v%d addr for -I %s", 4+2*(family==AF_INET6), TT.I); - TT.sa = ai->ai_addr; - - // Open DGRAM socket - sa->sa_family = ai->ai_family; - TT.sock = socket(ai->ai_family, SOCK_DGRAM, - len = (ai->ai_family == AF_INET) ? IPPROTO_ICMP : IPPROTO_ICMPV6); - if (TT.sock == -1) { - perror_msg("socket SOCK_DGRAM %x", len); - if (errno == EACCES) { - fprintf(stderr, "Kernel bug workaround (as root):\n"); - fprintf(stderr, "echo 0 9999999 > /proc/sys/net/ipv4/ping_group_range\n"); - } - xexit(); - } - if (TT.I && bind(TT.sock, sa, sizeof(src_addr))) perror_exit("bind"); - - if (TT.t) { - len = TT.t; - - if (ai->ai_family == AF_INET) - setsockopt(TT.sock, IPPROTO_IP, IP_TTL, &len, 4); - else setsockopt(TT.sock, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &len, 4); - } - - if (!(toys.optflags&FLAG_q)) { - printf("Ping %s (%s)", *toys.optargs, ntop(TT.sa)); - if (TT.I) { - *toybuf = 0; - printf(" from %s (%s)", TT.I, ntop(sa)); - } - // 20 byte TCP header, 8 byte ICMP header, plus data payload - printf(": %ld(%ld) bytes.\n", TT.s, TT.s+28); - } - toys.exitval = 1; - - tW = tw = 0; - tnext = millitime(); - if (TT.w) tw = TT.w*1000+tnext; - - // Send/receive packets - for (;;) { - int waitms = INT_MAX; - - // Exit due to timeout? (TODO: timeout is after last packet, waiting if - // any packets ever dropped. Not timeout since packet was dropped.) - tnow = millitime(); - if (tW) if (0>=(waitms = tW-tnow) || !(TT.sent-TT.recv)) break; - if (tw) { - if (tnow>tw) break; - else if (waitms>tw-tnow) waitms = tw-tnow; - // Time to send the next packet? - } else if (tnext-tnow <= 0) { - tnext += TT.i_ms; - - memset(ih, 0, sizeof(*ih)); - ih->type = (ai->ai_family == AF_INET) ? 8 : 128; - ih->un.echo.id = getpid(); - ih->un.echo.sequence = ++seq; - if (TT.s >= 4) *(unsigned *)(ih+1) = tnow; - - ih->checksum = 0; - ih->checksum = pingchksum((void *)toybuf, TT.s+sizeof(*ih)); - xsendto(TT.sock, toybuf, TT.s+sizeof(*ih), TT.sa); - TT.sent++; - if ((toys.optflags&(FLAG_f|FLAG_q)) == FLAG_f) xputc('.'); - - // last packet? - if (TT.c) if (!--TT.c) { - if (!TT.W) break; - tW = tnow + TT.W*1000; - } - } - - // This is down here so it's against new period if we just sent a packet - if (!tw && waitms>tnext-tnow) waitms = tnext-tnow; - - // wait for next packet or timeout - - if (waitms<0) waitms = 0; - pfd.fd = TT.sock; - pfd.events = POLLIN; - if (0>(len = poll(&pfd, 1, waitms))) break; - if (!len) continue; - - len = sizeof(src_addr2); - len = recvfrom(TT.sock, toybuf, sizeof(toybuf), 0, sa2, (void *)&len); - TT.recv++; - TT.fugit += (pkttime = millitime()-*(unsigned *)(ih+1)); - - // reply id == 0 for ipv4, 129 for ipv6 - - if (!(toys.optflags&FLAG_q)) { - if (toys.optflags&FLAG_f) xputc('\b'); - else { - printf("%d bytes from %s: icmp_seq=%d ttl=%d", len, ntop(sa2), - ih->un.echo.sequence, 0); - if (len >= sizeof(*ih)+4) - printf(" time=%u ms", pkttime); - xputc('\n'); - } - } - - toys.exitval = 0; - } - - summary(0); - - if (CFG_TOYBOX_FREE) { - freeaddrinfo(ai2); - if (ifa2) freeifaddrs(ifa2); - } -} |