shukitchan commented on code in PR #12645:
URL: https://github.com/apache/trafficserver/pull/12645#discussion_r2505647477
##########
plugins/header_rewrite/operators.cc:
##########
@@ -1800,3 +1800,45 @@ OperatorIf::exec_section(const CondOpSection *section,
const Resources &res) con
return section->ops.oper_mods;
}
+
+// OperatorSetCongestionCtrl
+void
+OperatorSetCCAlgorithm::initialize(Parser &p)
+{
+ Operator::initialize(p);
+ _cc_alg.set_value(p.get_arg());
+}
+
+void
+OperatorSetCCAlgorithm::initialize_hooks()
+{
+ add_allowed_hook(TS_REMAP_PSEUDO_HOOK);
+ add_allowed_hook(TS_HTTP_SEND_REQUEST_HDR_HOOK);
+ add_allowed_hook(TS_HTTP_READ_REQUEST_HDR_HOOK);
+ add_allowed_hook(TS_HTTP_PRE_REMAP_HOOK);
+}
+
+bool
+OperatorSetCCAlgorithm::exec(const Resources &res) const
+{
+ Dbg(dbg_ctl, "OperatorSetCCAlgorithm");
+
+ if (!res.state.txnp) {
+ TSError("[%s] OperatorSetCCAlgorithm() failed. Transaction is null",
PLUGIN_NAME);
+ return false;
+ }
+
+ int client_fd;
+ if (TSHttpTxnClientFdGet(res.state.txnp, &client_fd) != TS_SUCCESS) {
+ TSError("[%s] [OperatorSetCCAlgorithm] Error getting client fd",
PLUGIN_NAME);
+ }
+
+#ifdef TCP_CONGESTION
+ if (safe_setsockopt(client_fd, IPPROTO_TCP, TCP_CONGESTION,
_cc_alg.get_value().data(), _cc_alg.size()) == -1) {
+ TSError("[%s] [OperatorSetCCAlgorithm] Error setting congestion control
algorithm, errno=%d %s", PLUGIN_NAME, errno,
+ strerror(errno));
+ }
+
+#endif
Review Comment:
Perhaps we should output an error or warning saying that it is not supported
in the current system if TCP_CONGESTION is not defined?
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