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| author | Lukas Larsson <[email protected]> | 2018-06-21 11:00:25 +0200 |
|---|---|---|
| committer | Lukas Larsson <[email protected]> | 2018-07-30 16:55:26 +0200 |
| commit | a9d361b4be7d6329bedd7b37d454c1abf4f27233 (patch) | |
| tree | a55a060d66bad33cff29fe00ab1ac1b171a4ce74 /erts/emulator/drivers/common | |
| parent | 83445d0de88a1ad15066e6c415b2c2d9aa93d6a1 (diff) | |
| download | otp-a9d361b4be7d6329bedd7b37d454c1abf4f27233.tar.gz otp-a9d361b4be7d6329bedd7b37d454c1abf4f27233.tar.bz2 otp-a9d361b4be7d6329bedd7b37d454c1abf4f27233.zip | |
erts: Limit the automatic max buffer for UDP to 2^16
There is no reason to have a larger buffer than this as
the recvmsg call will never return more data.
OTP-15206
Diffstat (limited to 'erts/emulator/drivers/common')
| -rw-r--r-- | erts/emulator/drivers/common/inet_drv.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c index 833befefd1..2048d0f625 100644 --- a/erts/emulator/drivers/common/inet_drv.c +++ b/erts/emulator/drivers/common/inet_drv.c @@ -1549,6 +1549,8 @@ static void *realloc_wrapper(void *current, ErlDrvSizeT size){ # define LOAD_ASSOC_ID LOAD_UINT # define LOAD_ASSOC_ID_CNT LOAD_UINT_CNT # define SCTP_ANC_BUFF_SIZE INET_DEF_BUFFER/2 /* XXX: not very good... */ +#else +# define IS_SCTP(desc) 0 #endif #ifdef HAVE_UDP @@ -6436,7 +6438,12 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr, int len) (long)desc->port, desc->s, res)); if (type == SO_RCVBUF) { /* make sure we have desc->bufsz >= SO_RCVBUF */ - if (ival > desc->bufsz) + if (ival > (1 << 16) && desc->stype == SOCK_DGRAM && !IS_SCTP(desc)) + /* For UDP we don't want to automatically + set the buffer size to be larger than + the theoretical max MTU */ + desc->bufsz = 1 << 16; + else if (ival > desc->bufsz) desc->bufsz = ival; } } |