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Make the message size limit used for SCTP_SENDALL configurable via
a sysctl variable instead of a compiled in constant. This is based on a patch provided by nwhitehorn@.
This commit is contained in:
parent
cd0d51baaa
commit
ae7cc6c9f8
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=356357
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@ -26,7 +26,7 @@
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.\"
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.\" $FreeBSD$
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.\"
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.Dd October 10, 2018
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.Dd January 4, 2020
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.Dt SCTP 4
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.Os
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.Sh NAME
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@ -472,6 +472,8 @@ Enable SCTP blackholing.
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See
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.Xr blackhole 4
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for more details.
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.It Va sendall_limit
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Maximum message size (in bytes) that can be transmitted with SCTP_SENDALL flags set.
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.It Va buffer_splitting
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Enable send/receive buffer splitting.
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.It Va vtag_time_wait
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@ -491,7 +491,6 @@ struct sctp_error_auth_invalid_hmac {
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* time */
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#define SCTP_SAT_NETWORK_BURST_INCR 2 /* how many times to multiply maxburst
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* in sat */
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#define SCTP_MAX_SENDALL_LIMIT 1024
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/* Data Chuck Specific Flags */
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#define SCTP_DATA_FRAG_MASK 0x03
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@ -6885,8 +6885,8 @@ sctp_sendall(struct sctp_inpcb *inp, struct uio *uio, struct mbuf *m,
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/* There is another. */
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return (EBUSY);
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}
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if (uio->uio_resid > SCTP_MAX_SENDALL_LIMIT) {
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/* You must be less than the max! */
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if (uio->uio_resid > SCTP_BASE_SYSCTL(sctp_sendall_limit)) {
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/* You must not be larger than the limit! */
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return (EMSGSIZE);
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}
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SCTP_MALLOC(ca, struct sctp_copy_all *, sizeof(struct sctp_copy_all),
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@ -119,6 +119,7 @@ sctp_init_sysctls()
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SCTP_BASE_SYSCTL(sctp_steady_step) = SCTPCTL_RTTVAR_STEADYS_DEFAULT;
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SCTP_BASE_SYSCTL(sctp_use_dccc_ecn) = SCTPCTL_RTTVAR_DCCCECN_DEFAULT;
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SCTP_BASE_SYSCTL(sctp_blackhole) = SCTPCTL_BLACKHOLE_DEFAULT;
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SCTP_BASE_SYSCTL(sctp_sendall_limit) = SCTPCTL_SENDALL_LIMIT_DEFAULT;
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SCTP_BASE_SYSCTL(sctp_diag_info_code) = SCTPCTL_DIAG_INFO_CODE_DEFAULT;
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#if defined(SCTP_LOCAL_TRACE_BUF)
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memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log));
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@ -943,6 +944,7 @@ SCTP_UINT_SYSCTL(rttvar_eqret, sctp_rttvar_eqret, SCTPCTL_RTTVAR_EQRET)
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SCTP_UINT_SYSCTL(rttvar_steady_step, sctp_steady_step, SCTPCTL_RTTVAR_STEADYS)
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SCTP_UINT_SYSCTL(use_dcccecn, sctp_use_dccc_ecn, SCTPCTL_RTTVAR_DCCCECN)
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SCTP_UINT_SYSCTL(blackhole, sctp_blackhole, SCTPCTL_BLACKHOLE)
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SCTP_UINT_SYSCTL(sendall_limit, sctp_sendall_limit, SCTPCTL_SENDALL_LIMIT)
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SCTP_UINT_SYSCTL(diag_info_code, sctp_diag_info_code, SCTPCTL_DIAG_INFO_CODE)
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#ifdef SCTP_DEBUG
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SCTP_UINT_SYSCTL(debug, sctp_debug_on, SCTPCTL_DEBUG)
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@ -116,6 +116,7 @@ struct sctp_sysctl {
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uint32_t sctp_buffer_splitting;
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uint32_t sctp_initial_cwnd;
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uint32_t sctp_blackhole;
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uint32_t sctp_sendall_limit;
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#if defined(SCTP_DEBUG)
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uint32_t sctp_debug_on;
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#endif
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@ -538,6 +539,12 @@ struct sctp_sysctl {
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#define SCTPCTL_BLACKHOLE_MAX 2
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#define SCTPCTL_BLACKHOLE_DEFAULT SCTPCTL_BLACKHOLE_MIN
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/* sendall_limit: Maximum message with SCTP_SENDALL */
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#define SCTPCTL_SENDALL_LIMIT_DESC "Maximum size of a message send with SCTP_SENDALL"
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#define SCTPCTL_SENDALL_LIMIT_MIN 0
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#define SCTPCTL_SENDALL_LIMIT_MAX 0xFFFFFFFF
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#define SCTPCTL_SENDALL_LIMIT_DEFAULT 1432
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#define SCTPCTL_DIAG_INFO_CODE_DESC "Diagnostic information error cause code"
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#define SCTPCTL_DIAG_INFO_CODE_MIN 0
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#define SCTPCTL_DIAG_INFO_CODE_MAX 65535
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