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| author | Bruce A. Mah <bmah@es.net> | 2014-10-13 08:55:41 -0700 |
|---|---|---|
| committer | Bruce A. Mah <bmah@es.net> | 2014-10-13 08:55:41 -0700 |
| commit | 96d0c77ca24da07d52f8d1c20301c202e4f0360b (patch) | |
| tree | 6d9a3d136ef06b4ea609823c88b5e0b3a96f5380 /src/iperf_api.c | |
| parent | 8694d1db0d0b95ea76ca2bfce79a01e48290bfce (diff) | |
| download | iperf3-96d0c77ca24da07d52f8d1c20301c202e4f0360b.tar.gz | |
The maximum send length for UDP is the maximum size of a UDP datagram.
For UDP over IPv4, this is the maximum IPv4 packet size (65535) minus
the size of the IPv4 and UDP headers, arriving at 65507.
In theory for a system implementing IPv6 jumbogram support, there is
no maximum packet size for UDP. In practice we've observed with
CentOS 5 a limitation of 65535 - 8, which is dictated by the size
field in the UDP header (it has a maximum value of 65535, but needs
to count both payload and header bytes, thus subtracting off the 8
bytes for the UDP header).
We take the most conservative approach and use the 65507 value
for UDP / IPv4.
This is (I believe) the last part of issue #212.
Diffstat (limited to 'src/iperf_api.c')
| -rw-r--r-- | src/iperf_api.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/iperf_api.c b/src/iperf_api.c index 4596c55..0d38f8d 100644 --- a/src/iperf_api.c +++ b/src/iperf_api.c @@ -913,6 +913,11 @@ iperf_parse_arguments(struct iperf_test *test, int argc, char **argv) i_errno = IEBLOCKSIZE; return -1; } + if (test->protocol->id == Pudp && + blksize > MAX_UDP_BLOCKSIZE) { + i_errno = IEUDPBLOCKSIZE; + return -1; + } test->settings->blksize = blksize; if (!rate_flag) |