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The following commit(s) were added to refs/heads/master by this push:
new b53e745 Adds support for TCP_NOTSENT_LOWAT sockopt (#8354)
b53e745 is described below
commit b53e74581b9fc7517280451c3d5e9799f2e7d9fa
Author: Randall Meyer <r...@apache.org>
AuthorDate: Mon Oct 4 16:43:56 2021 -0700
Adds support for TCP_NOTSENT_LOWAT sockopt (#8354)
---
doc/admin-guide/files/records.config.en.rst | 7 +++++++
doc/admin-guide/plugins/lua.en.rst | 1 +
.../api/functions/TSHttpOverridableConfig.en.rst | 1 +
.../api/types/TSOverridableConfigKey.en.rst | 1 +
include/ts/apidefs.h.in | 1 +
iocore/net/I_NetProcessor.h | 1 +
iocore/net/I_NetVConnection.h | 5 ++++-
iocore/net/P_UnixNetVConnection.h | 22 ++++++++++++----------
iocore/net/UnixConnection.cc | 7 +++++++
iocore/net/UnixNetAccept.cc | 14 ++++++++------
iocore/net/UnixNetProcessor.cc | 1 +
mgmt/RecordsConfig.cc | 2 ++
plugins/lua/ts_lua_http_config.c | 2 ++
proxy/http/HttpConfig.cc | 2 ++
proxy/http/HttpConfig.h | 1 +
proxy/http/HttpProxyServerMain.cc | 4 ++++
proxy/http/HttpSM.cc | 12 +++++++-----
proxy/shared/UglyLogStubs.cc | 1 +
src/shared/overridable_txn_vars.cc | 3 ++-
src/traffic_server/InkAPI.cc | 3 +++
src/traffic_server/InkAPITest.cc | 3 ++-
21 files changed, 70 insertions(+), 24 deletions(-)
diff --git a/doc/admin-guide/files/records.config.en.rst
b/doc/admin-guide/files/records.config.en.rst
index 03e9e29..7a226a5 100644
--- a/doc/admin-guide/files/records.config.en.rst
+++ b/doc/admin-guide/files/records.config.en.rst
@@ -4581,6 +4581,7 @@ Sockets
TCP_FASTOPEN (8)
PACKET_MARK (16)
PACKET_TOS (32)
+ TCP_NOTSENT_LOWAT (64)
.. note::
@@ -4615,6 +4616,7 @@ Sockets
TCP_FASTOPEN (8)
PACKET_MARK (16)
PACKET_TOS (32)
+ TCP_NOTSENT_LOWAT (64)
.. note::
@@ -4666,6 +4668,11 @@ Sockets
.. seealso:: `Traffic Shaping`_
+.. ts:cv:: CONFIG proxy.config.net.sock_notsent_lowat INT 16384
+ :overridable:
+
+ Set socket option TCP_NOTSENT_LOWAT to specified value for a connection
+
.. ts:cv:: CONFIG proxy.config.net.poll_timeout INT 10 (or 30 on Solaris)
Same as the command line option ``--poll_timeout``, or ``-t``, which
diff --git a/doc/admin-guide/plugins/lua.en.rst
b/doc/admin-guide/plugins/lua.en.rst
index 6c598da..62c280b 100644
--- a/doc/admin-guide/plugins/lua.en.rst
+++ b/doc/admin-guide/plugins/lua.en.rst
@@ -4007,6 +4007,7 @@ Http config constants
TS_LUA_CONFIG_HTTP_HOST_RESOLUTION_PREFERENCE
TS_LUA_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_INDEX
TS_LUA_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_WATER_MARK
+ TS_LUA_CONFIG_NET_SOCK_NOTSENT_LOWAT
TS_LUA_CONFIG_LAST_ENTRY
:ref:`TOP <admin-plugins-ts-lua>`
diff --git a/doc/developer-guide/api/functions/TSHttpOverridableConfig.en.rst
b/doc/developer-guide/api/functions/TSHttpOverridableConfig.en.rst
index 8ad3ae5..d6bc066 100644
--- a/doc/developer-guide/api/functions/TSHttpOverridableConfig.en.rst
+++ b/doc/developer-guide/api/functions/TSHttpOverridableConfig.en.rst
@@ -187,6 +187,7 @@ TSOverridableConfigKey Value
Config
:c:enumerator:`TS_CONFIG_HTTP_HOST_RESOLUTION_PREFERENCE`
:ts:cv:`proxy.config.hostdb.ip_resolve`
:c:enumerator:`TS_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_INDEX`
:ts:cv:`proxy.config.plugin.vc.default_buffer_index`
:c:enumerator:`TS_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_WATER_MARK`
:ts:cv:`proxy.config.plugin.vc.default_buffer_water_mark`
+:c:enumerator:`TS_CONFIG_NET_SOCK_NOTSENT_LOWAT`
:ts:cv:`proxy.config.net.sock_notsent_lowat`
========================================================================
====================================================================
Examples
diff --git a/doc/developer-guide/api/types/TSOverridableConfigKey.en.rst
b/doc/developer-guide/api/types/TSOverridableConfigKey.en.rst
index 8e1a919..50b9d8e 100644
--- a/doc/developer-guide/api/types/TSOverridableConfigKey.en.rst
+++ b/doc/developer-guide/api/types/TSOverridableConfigKey.en.rst
@@ -152,6 +152,7 @@ Enumeration Members
.. c:enumerator:: TS_CONFIG_HTTP_HOST_RESOLUTION_PREFERENCE
.. c:enumerator:: TS_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_INDEX
.. c:enumerator:: TS_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_WATER_MARK
+.. c:enumerator:: TS_CONFIG_NET_SOCK_NOTSENT_LOWAT
Description
diff --git a/include/ts/apidefs.h.in b/include/ts/apidefs.h.in
index ee65fab..be12d43 100644
--- a/include/ts/apidefs.h.in
+++ b/include/ts/apidefs.h.in
@@ -865,6 +865,7 @@ typedef enum {
TS_CONFIG_HTTP_CONNECT_DEAD_POLICY,
TS_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_INDEX,
TS_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_WATER_MARK,
+ TS_CONFIG_NET_SOCK_NOTSENT_LOWAT,
TS_CONFIG_LAST_ENTRY
} TSOverridableConfigKey;
diff --git a/iocore/net/I_NetProcessor.h b/iocore/net/I_NetProcessor.h
index 7edb8e8..8afd264 100644
--- a/iocore/net/I_NetProcessor.h
+++ b/iocore/net/I_NetProcessor.h
@@ -85,6 +85,7 @@ public:
uint32_t sockopt_flags;
uint32_t packet_mark;
uint32_t packet_tos;
+ uint32_t packet_notsent_lowat;
int tfo_queue_length;
diff --git a/iocore/net/I_NetVConnection.h b/iocore/net/I_NetVConnection.h
index 6ad2a01..f74c750 100644
--- a/iocore/net/I_NetVConnection.h
+++ b/iocore/net/I_NetVConnection.h
@@ -180,9 +180,12 @@ struct NetVCOptions {
static uint32_t const SOCK_OPT_PACKET_MARK = 16;
/// Value for IP_TOS @c sockopt_flags
static uint32_t const SOCK_OPT_PACKET_TOS = 32;
+ /// Value for TCP_NOTSENT_LOWAT @c sockopt_flags
+ static uint32_t const SOCK_OPT_TCP_NOTSENT_LOWAT = 64;
uint32_t packet_mark;
uint32_t packet_tos;
+ uint32_t packet_notsent_lowat;
EventType etype;
@@ -241,7 +244,7 @@ struct NetVCOptions {
void reset();
void set_sock_param(int _recv_bufsize, int _send_bufsize, unsigned long
_opt_flags, unsigned long _packet_mark = 0,
- unsigned long _packet_tos = 0);
+ unsigned long _packet_tos = 0, unsigned long
_packet_notsent_lowat = 0);
NetVCOptions() { reset(); }
~NetVCOptions() {}
diff --git a/iocore/net/P_UnixNetVConnection.h
b/iocore/net/P_UnixNetVConnection.h
index fcd05db..65e763f 100644
--- a/iocore/net/P_UnixNetVConnection.h
+++ b/iocore/net/P_UnixNetVConnection.h
@@ -60,10 +60,11 @@ NetVCOptions::reset()
#else
0;
#endif
- socket_send_bufsize = 0;
- sockopt_flags = 0;
- packet_mark = 0;
- packet_tos = 0;
+ socket_send_bufsize = 0;
+ sockopt_flags = 0;
+ packet_mark = 0;
+ packet_tos = 0;
+ packet_notsent_lowat = 0;
etype = ET_NET;
@@ -77,13 +78,14 @@ NetVCOptions::reset()
inline void
NetVCOptions::set_sock_param(int _recv_bufsize, int _send_bufsize, unsigned
long _opt_flags, unsigned long _packet_mark,
- unsigned long _packet_tos)
+ unsigned long _packet_tos, unsigned long
_packet_notsent_lowat)
{
- socket_recv_bufsize = _recv_bufsize;
- socket_send_bufsize = _send_bufsize;
- sockopt_flags = _opt_flags;
- packet_mark = _packet_mark;
- packet_tos = _packet_tos;
+ socket_recv_bufsize = _recv_bufsize;
+ socket_send_bufsize = _send_bufsize;
+ sockopt_flags = _opt_flags;
+ packet_mark = _packet_mark;
+ packet_tos = _packet_tos;
+ packet_notsent_lowat = _packet_notsent_lowat;
}
enum tcp_congestion_control_t { CLIENT_SIDE, SERVER_SIDE };
diff --git a/iocore/net/UnixConnection.cc b/iocore/net/UnixConnection.cc
index 7be4de6..99d1785 100644
--- a/iocore/net/UnixConnection.cc
+++ b/iocore/net/UnixConnection.cc
@@ -286,6 +286,13 @@ Connection::apply_options(NetVCOptions const &opt)
safe_setsockopt(fd, SOL_SOCKET, SO_LINGER, reinterpret_cast<char *>(&l),
sizeof(l));
Debug("socket", "::open:: setsockopt() turn on SO_LINGER on socket");
}
+#ifdef TCP_NOTSENT_LOWAT
+ if (opt.sockopt_flags & NetVCOptions::SOCK_OPT_TCP_NOTSENT_LOWAT) {
+ uint32_t lowat = opt.packet_notsent_lowat;
+ safe_setsockopt(fd, IPPROTO_TCP, TCP_NOTSENT_LOWAT,
reinterpret_cast<char *>(&lowat), sizeof(lowat));
+ Debug("socket", "::open:: setsockopt() set TCP_NOTSENT_LOWAT to %d",
lowat);
+ }
+#endif
}
#if TS_HAS_SO_MARK
diff --git a/iocore/net/UnixNetAccept.cc b/iocore/net/UnixNetAccept.cc
index 86bf38c..35e5660 100644
--- a/iocore/net/UnixNetAccept.cc
+++ b/iocore/net/UnixNetAccept.cc
@@ -337,9 +337,10 @@ NetAccept::do_blocking_accept(EThread *t)
vc->action_ = *action_;
vc->set_is_transparent(opt.f_inbound_transparent);
vc->set_is_proxy_protocol(opt.f_proxy_protocol);
- vc->options.packet_mark = opt.packet_mark;
- vc->options.packet_tos = opt.packet_tos;
- vc->options.ip_family = opt.ip_family;
+ vc->options.packet_mark = opt.packet_mark;
+ vc->options.packet_tos = opt.packet_tos;
+ vc->options.packet_notsent_lowat = opt.packet_notsent_lowat;
+ vc->options.ip_family = opt.ip_family;
vc->apply_options();
vc->set_context(NET_VCONNECTION_IN);
if (opt.f_mptcp) {
@@ -488,9 +489,10 @@ NetAccept::acceptFastEvent(int event, void *ep)
vc->action_ = *action_;
vc->set_is_transparent(opt.f_inbound_transparent);
vc->set_is_proxy_protocol(opt.f_proxy_protocol);
- vc->options.packet_mark = opt.packet_mark;
- vc->options.packet_tos = opt.packet_tos;
- vc->options.ip_family = opt.ip_family;
+ vc->options.packet_mark = opt.packet_mark;
+ vc->options.packet_tos = opt.packet_tos;
+ vc->options.packet_notsent_lowat = opt.packet_notsent_lowat;
+ vc->options.ip_family = opt.ip_family;
vc->apply_options();
vc->set_context(NET_VCONNECTION_IN);
if (opt.f_mptcp) {
diff --git a/iocore/net/UnixNetProcessor.cc b/iocore/net/UnixNetProcessor.cc
index ba012e0..ba5062d 100644
--- a/iocore/net/UnixNetProcessor.cc
+++ b/iocore/net/UnixNetProcessor.cc
@@ -49,6 +49,7 @@ NetProcessor::AcceptOptions::reset()
sockopt_flags = 0;
packet_mark = 0;
packet_tos = 0;
+ packet_notsent_lowat = 0;
tfo_queue_length = 0;
f_inbound_transparent = false;
f_mptcp = false;
diff --git a/mgmt/RecordsConfig.cc b/mgmt/RecordsConfig.cc
index 997d5fc..b89ab4e 100644
--- a/mgmt/RecordsConfig.cc
+++ b/mgmt/RecordsConfig.cc
@@ -786,6 +786,8 @@ static const RecordElement RecordsConfig[] =
,
{RECT_CONFIG, "proxy.config.net.sock_mss_in", RECD_INT, "0",
RECU_RESTART_TS, RR_NULL, RECC_NULL, nullptr, RECA_NULL}
,
+ {RECT_CONFIG, "proxy.config.net.sock_notsent_lowat", RECD_INT, "32768",
RECU_DYNAMIC, RR_NULL, RECC_NULL, nullptr, RECA_NULL}
+ ,
{RECT_CONFIG, "proxy.config.net.poll_timeout", RECD_INT, "10",
RECU_RESTART_TS, RR_NULL, RECC_NULL, nullptr, RECA_NULL}
,
{RECT_CONFIG, "proxy.config.net.default_inactivity_timeout", RECD_INT,
"86400", RECU_DYNAMIC, RR_NULL, RECC_NULL, nullptr, RECA_NULL}
diff --git a/plugins/lua/ts_lua_http_config.c b/plugins/lua/ts_lua_http_config.c
index 24420fe..faa70ef 100644
--- a/plugins/lua/ts_lua_http_config.c
+++ b/plugins/lua/ts_lua_http_config.c
@@ -141,6 +141,7 @@ typedef enum {
TS_LUA_CONFIG_HTTP_HOST_RESOLUTION_PREFERENCE =
TS_CONFIG_HTTP_HOST_RESOLUTION_PREFERENCE,
TS_LUA_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_INDEX =
TS_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_INDEX,
TS_LUA_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_WATER_MARK =
TS_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_WATER_MARK,
+ TS_LUA_CONFIG_NET_SOCK_NOTSENT_LOWAT =
TS_CONFIG_NET_SOCK_NOTSENT_LOWAT,
TS_LUA_CONFIG_LAST_ENTRY =
TS_CONFIG_LAST_ENTRY,
} TSLuaOverridableConfigKey;
@@ -274,6 +275,7 @@ ts_lua_var_item ts_lua_http_config_vars[] = {
TS_LUA_MAKE_VAR_ITEM(TS_LUA_CONFIG_HTTP_PER_SERVER_CONNECTION_MATCH),
TS_LUA_MAKE_VAR_ITEM(TS_LUA_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_INDEX),
TS_LUA_MAKE_VAR_ITEM(TS_LUA_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_WATER_MARK),
+ TS_LUA_MAKE_VAR_ITEM(TS_LUA_CONFIG_NET_SOCK_NOTSENT_LOWAT),
TS_LUA_MAKE_VAR_ITEM(TS_LUA_CONFIG_LAST_ENTRY),
};
diff --git a/proxy/http/HttpConfig.cc b/proxy/http/HttpConfig.cc
index e00f8d9..9b8f372 100644
--- a/proxy/http/HttpConfig.cc
+++ b/proxy/http/HttpConfig.cc
@@ -1256,6 +1256,7 @@ HttpConfig::startup()
HttpEstablishStaticConfigLongLong(c.oride.sock_option_flag_out,
"proxy.config.net.sock_option_flag_out");
HttpEstablishStaticConfigLongLong(c.oride.sock_packet_mark_out,
"proxy.config.net.sock_packet_mark_out");
HttpEstablishStaticConfigLongLong(c.oride.sock_packet_tos_out,
"proxy.config.net.sock_packet_tos_out");
+ HttpEstablishStaticConfigLongLong(c.oride.sock_packet_notsent_lowat,
"proxy.config.net.sock_notsent_lowat");
HttpEstablishStaticConfigByte(c.oride.fwd_proxy_auth_to_parent,
"proxy.config.http.forward.proxy_auth_to_parent");
@@ -1547,6 +1548,7 @@ HttpConfig::reconfigure()
params->oride.sock_packet_mark_out =
m_master.oride.sock_packet_mark_out;
params->oride.sock_packet_tos_out = m_master.oride.sock_packet_tos_out;
params->oride.sock_option_flag_out =
m_master.oride.sock_option_flag_out;
+ params->oride.sock_packet_notsent_lowat =
m_master.oride.sock_packet_notsent_lowat;
// Clear the TCP Fast Open option if it is not supported on this host.
if ((params->oride.sock_option_flag_out &
NetVCOptions::SOCK_OPT_TCP_FAST_OPEN) && !SocketManager::fastopen_supported()) {
diff --git a/proxy/http/HttpConfig.h b/proxy/http/HttpConfig.h
index 233f875..457c487 100644
--- a/proxy/http/HttpConfig.h
+++ b/proxy/http/HttpConfig.h
@@ -630,6 +630,7 @@ struct OverridableHttpConfigParams {
MgmtInt sock_option_flag_out = 0;
MgmtInt sock_packet_mark_out = 0;
MgmtInt sock_packet_tos_out = 0;
+ MgmtInt sock_packet_notsent_lowat = 0;
///////////////
// Hdr Limit //
diff --git a/proxy/http/HttpProxyServerMain.cc
b/proxy/http/HttpProxyServerMain.cc
index f5f1c3b..68f6810 100644
--- a/proxy/http/HttpProxyServerMain.cc
+++ b/proxy/http/HttpProxyServerMain.cc
@@ -149,6 +149,10 @@ make_net_accept_options(const HttpProxyPort *port,
unsigned nthreads)
REC_ReadConfigInteger(net.sockopt_flags,
"proxy.config.net.sock_option_flag_in");
REC_ReadConfigInteger(net.defer_accept, "proxy.config.net.defer_accept");
+#if TCP_NOTSENT_LOWAT
+ REC_ReadConfigInteger(net.packet_notsent_lowat,
"proxy.config.net.sock_notsent_lowat");
+#endif
+
#ifdef TCP_FASTOPEN
REC_ReadConfigInteger(net.tfo_queue_length,
"proxy.config.net.sock_option_tfo_queue_size_in");
#endif
diff --git a/proxy/http/HttpSM.cc b/proxy/http/HttpSM.cc
index ec77453..51da337 100644
--- a/proxy/http/HttpSM.cc
+++ b/proxy/http/HttpSM.cc
@@ -5307,7 +5307,7 @@ HttpSM::do_http_server_open(bool raw)
opt.f_blocking_connect = false;
opt.set_sock_param(t_state.txn_conf->sock_recv_buffer_size_out,
t_state.txn_conf->sock_send_buffer_size_out,
t_state.txn_conf->sock_option_flag_out,
t_state.txn_conf->sock_packet_mark_out,
- t_state.txn_conf->sock_packet_tos_out);
+ t_state.txn_conf->sock_packet_tos_out,
t_state.txn_conf->sock_packet_notsent_lowat);
set_tls_options(opt, t_state.txn_conf);
@@ -5766,10 +5766,12 @@ HttpSM::handle_http_server_open()
server_connection_provided_cert = vc->provided_cert();
if (vc->options.sockopt_flags != t_state.txn_conf->sock_option_flag_out
||
vc->options.packet_mark != t_state.txn_conf->sock_packet_mark_out ||
- vc->options.packet_tos != t_state.txn_conf->sock_packet_tos_out) {
- vc->options.sockopt_flags = t_state.txn_conf->sock_option_flag_out;
- vc->options.packet_mark = t_state.txn_conf->sock_packet_mark_out;
- vc->options.packet_tos = t_state.txn_conf->sock_packet_tos_out;
+ vc->options.packet_tos != t_state.txn_conf->sock_packet_tos_out ||
+ vc->options.packet_notsent_lowat !=
t_state.txn_conf->sock_packet_notsent_lowat) {
+ vc->options.sockopt_flags =
t_state.txn_conf->sock_option_flag_out;
+ vc->options.packet_mark =
t_state.txn_conf->sock_packet_mark_out;
+ vc->options.packet_tos =
t_state.txn_conf->sock_packet_tos_out;
+ vc->options.packet_notsent_lowat =
t_state.txn_conf->sock_packet_notsent_lowat;
vc->apply_options();
}
}
diff --git a/proxy/shared/UglyLogStubs.cc b/proxy/shared/UglyLogStubs.cc
index 99081ec..f845633 100644
--- a/proxy/shared/UglyLogStubs.cc
+++ b/proxy/shared/UglyLogStubs.cc
@@ -122,6 +122,7 @@ NetProcessor::AcceptOptions::reset()
sockopt_flags = 0;
packet_mark = 0;
packet_tos = 0;
+ packet_notsent_lowat = 0;
f_inbound_transparent = false;
return *this;
}
diff --git a/src/shared/overridable_txn_vars.cc
b/src/shared/overridable_txn_vars.cc
index 7c2f398..84d90cf 100644
--- a/src/shared/overridable_txn_vars.cc
+++ b/src/shared/overridable_txn_vars.cc
@@ -165,4 +165,5 @@ const std::unordered_map<std::string_view, std::tuple<const
TSOverridableConfigK
{"proxy.config.ssl.client.CA.cert.filename",
{TS_CONFIG_SSL_CLIENT_CA_CERT_FILENAME, TS_RECORDDATATYPE_STRING}},
{"proxy.config.hostdb.ip_resolve",
{TS_CONFIG_HTTP_HOST_RESOLUTION_PREFERENCE, TS_RECORDDATATYPE_STRING}},
{"proxy.config.plugin.vc.default_buffer_index",
{TS_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_INDEX, TS_RECORDDATATYPE_INT}},
- {"proxy.config.plugin.vc.default_buffer_water_mark",
{TS_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_WATER_MARK, TS_RECORDDATATYPE_INT}}});
+ {"proxy.config.plugin.vc.default_buffer_water_mark",
{TS_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_WATER_MARK, TS_RECORDDATATYPE_INT}},
+ {"proxy.config.net.sock_notsent_lowat",
{TS_CONFIG_NET_SOCK_NOTSENT_LOWAT, TS_RECORDDATATYPE_INT}}});
diff --git a/src/traffic_server/InkAPI.cc b/src/traffic_server/InkAPI.cc
index c3f0cd7..21f711c 100644
--- a/src/traffic_server/InkAPI.cc
+++ b/src/traffic_server/InkAPI.cc
@@ -8944,6 +8944,9 @@ _conf_to_memberp(TSOverridableConfigKey conf,
OverridableHttpConfigParams *overr
case TS_CONFIG_PLUGIN_VC_DEFAULT_BUFFER_WATER_MARK:
ret =
_memberp_to_generic(&overridableHttpConfig->plugin_vc_default_buffer_water_mark,
conv);
break;
+ case TS_CONFIG_NET_SOCK_NOTSENT_LOWAT:
+ ret =
_memberp_to_generic(&overridableHttpConfig->sock_packet_notsent_lowat, conv);
+ break;
// This helps avoiding compiler warnings, yet detect unhandled enum members.
case TS_CONFIG_NULL:
case TS_CONFIG_LAST_ENTRY:
diff --git a/src/traffic_server/InkAPITest.cc b/src/traffic_server/InkAPITest.cc
index 783c1c7..0230012 100644
--- a/src/traffic_server/InkAPITest.cc
+++ b/src/traffic_server/InkAPITest.cc
@@ -8698,7 +8698,8 @@ std::array<std::string_view, TS_CONFIG_LAST_ENTRY>
SDK_Overridable_Configs = {
"proxy.config.hostdb.ip_resolve",
"proxy.config.http.connect.dead.policy",
"proxy.config.plugin.vc.default_buffer_index",
- "proxy.config.plugin.vc.default_buffer_water_mark"}};
+ "proxy.config.plugin.vc.default_buffer_water_mark",
+ "proxy.config.net.sock_notsent_lowat"}};
extern ClassAllocator<HttpSM> httpSMAllocator;
