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| author | Rob Landley <rob@landley.net> | 2018-06-09 13:10:29 -0500 |
|---|---|---|
| committer | Rob Landley <rob@landley.net> | 2018-06-09 13:10:29 -0500 |
| commit | c88d216f221e49031f8fa6f924a9b1e8dffa1463 (patch) | |
| tree | 856c82d52a4dbbb05ae37c1a354e6c9247c3524b | |
| parent | 5efc1674a81ce1fd423ca8aac2ce3c02144751fc (diff) | |
| download | toybox-c88d216f221e49031f8fa6f924a9b1e8dffa1463.tar.gz | |
Show workaround for the kernel bug when ping hits it.
Patches were submitted upstream to fix it at
https://patchwork.kernel.org/patch/9847017/ and
http://lkml.iu.edu/hypermail/linux/kernel/1710.3/04715.html to no effect.
| -rw-r--r-- | toys/pending/ping.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/toys/pending/ping.c b/toys/pending/ping.c index 3802918d..c29fb9df 100644 --- a/toys/pending/ping.c +++ b/toys/pending/ping.c @@ -149,8 +149,16 @@ void ping_main(void) // Open DGRAM socket sa->sa_family = ai->ai_family; - TT.sock = xsocket(ai->ai_family, SOCK_DGRAM, - (ai->ai_family == AF_INET) ? IPPROTO_ICMP : IPPROTO_ICMPV6); + 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) { |