Release 2.19.2

- [BUGFIX] Do not reduce PLPMTU size by network overhead.
- [BUGFIX] Windows build.

CHANGELOG

@@ -1,3 +1,8 @@
+2020-07-30
+    - 2.19.2
+    - [BUGFIX] Do not reduce PLPMTU size by network overhead.
+    - [BUGFIX] Windows build.
+
 2020-07-29
     - 2.19.1
     - [FEATURE] DPLPMTUD support.  IETF connections now search for the

docs/apiref.rst

@@ -762,6 +762,22 @@ settings structure:
 
         Default value is :macro:`LSQUIC_DF_MAX_PLPMTU`
 
+    .. member:: unsigned        es_mtu_probe_timer
+
+        This value specifies how long the DPLPMTUD probe timer is, in
+        milliseconds.  `[draft-ietf-tsvwg-datagram-plpmtud-22] <https://tools.ietf.org/html/draft-ietf-tsvwg-datagram-plpmtud-22>`_ says:
+
+            PROBE_TIMER:  The PROBE_TIMER is configured to expire after a period
+            longer than the maximum time to receive an acknowledgment to a
+            probe packet.  This value MUST NOT be smaller than 1 second, and
+            SHOULD be larger than 15 seconds.  Guidance on selection of the
+            timer value are provided in section 3.1.1 of the UDP Usage
+            Guidelines :rfc:`8085#section-3.1`.
+
+        If set to zero, the default is used.
+
+        Default value is :macro:`LSQUIC_DF_MTU_PROBE_TIMER`
+
     .. member:: unsigned        es_noprogress_timeout
 
        No progress timeout.
@@ -973,6 +989,10 @@ out of date.  Please check your :file:`lsquic.h` for actual values.*
 
     By default, this value is left up to the engine.
 
+.. macro:: LSQUIC_DF_MTU_PROBE_TIMER
+
+    By default, we use the minimum timer of 1000 milliseconds.
+
 .. macro:: LSQUIC_DF_NOPROGRESS_TIMEOUT_SERVER
 
     By default, drop no-progress connections after 60 seconds on the server.

docs/conf.py

@@ -26,7 +26,7 @@ author = u'LiteSpeed Technologies'
 # The short X.Y version
 version = u'2.19'
 # The full version, including alpha/beta/rc tags
-release = u'2.19.1'
+release = u'2.19.2'
 
 
 # -- General configuration ---------------------------------------------------

include/lsquic.h

@@ -25,7 +25,7 @@ extern "C" {
 
 #define LSQUIC_MAJOR_VERSION 2
 #define LSQUIC_MINOR_VERSION 19
-#define LSQUIC_PATCH_VERSION 1
+#define LSQUIC_PATCH_VERSION 2
 
 /**
  * Engine flags:

src/liblsquic/lsquic_full_conn.c

@@ -738,9 +738,7 @@ lsquic_gquic_full_conn_client_new (struct lsquic_engine_public *enpub,
     if (!max_packet_size)
     {
         if (enpub->enp_settings.es_base_plpmtu)
-            max_packet_size = enpub->enp_settings.es_base_plpmtu
+            max_packet_size = enpub->enp_settings.es_base_plpmtu;
-                        - (is_ipv4 ? 20 : 40)   /* IP header */
-                        - 8;                    /* UDP header */
         else if (is_ipv4)
             max_packet_size = GQUIC_MAX_IPv4_PACKET_SZ;
         else

src/liblsquic/lsquic_full_conn_ietf.c

@@ -705,7 +705,7 @@ calc_base_packet_size (const struct ietf_full_conn *conn, int is_ipv6)
     unsigned short size;
 
     if (conn->ifc_settings->es_base_plpmtu)
-        size = conn->ifc_settings->es_base_plpmtu - TRANSPORT_OVERHEAD(is_ipv6);
+        size = conn->ifc_settings->es_base_plpmtu;
     else if (is_ipv6)
         size = IQUIC_MAX_IPv6_PACKET_SZ;
     else
@@ -6964,13 +6964,15 @@ check_or_schedule_mtu_probe (struct ietf_full_conn *conn, lsquic_time_t now)
         return;
     }
 
-    net_header_sz = TRANSPORT_OVERHEAD(NP_IS_IPv6(&cpath->cop_path));
     if (ds->ds_failed_size)
-        mtu_ceiling = ds->ds_failed_size;   /* Don't subtract net_header_sz */
+        mtu_ceiling = ds->ds_failed_size;
     else if (conn->ifc_settings->es_max_plpmtu)
-        mtu_ceiling = conn->ifc_settings->es_max_plpmtu - net_header_sz;
+        mtu_ceiling = conn->ifc_settings->es_max_plpmtu;
     else
+    {
+        net_header_sz = TRANSPORT_OVERHEAD(NP_IS_IPv6(&cpath->cop_path));
         mtu_ceiling = 1500 - net_header_sz;
+    }
 
     if (conn->ifc_max_udp_payload < mtu_ceiling)
     {

src/liblsquic/lsquic_headers_stream.c

@@ -10,9 +10,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/queue.h>
-#ifdef MSVC
-#include <vc_compat.h>
-#endif
 
 #include "lsquic.h"
 #include "lsquic_types.h"

src/liblsquic/lsquic_mini_conn_ietf.c

@@ -514,9 +514,7 @@ lsquic_mini_conn_ietf_new (struct lsquic_engine_public *enpub,
     conn->imc_enpub = enpub;
     conn->imc_created = packet_in->pi_received;
     if (enpub->enp_settings.es_base_plpmtu)
-        conn->imc_path.np_pack_size = enpub->enp_settings.es_base_plpmtu
+        conn->imc_path.np_pack_size = enpub->enp_settings.es_base_plpmtu;
-                                    - (is_ipv4 ? 20 : 40)   /* IP header */
-                                    - 8;                    /* UDP header */
     else if (is_ipv4)
         conn->imc_path.np_pack_size = IQUIC_MAX_IPv4_PACKET_SZ;
     else

src/liblsquic/lsquic_rechist.c

@@ -8,9 +8,6 @@
 #include <inttypes.h>
 #include <stdlib.h>
 #include <string.h>
-#ifdef MSVC
-#include <vc_compat.h>
-#endif
 
 #include "lsquic_int_types.h"
 #include "lsquic_types.h"

src/liblsquic/lsquic_send_ctl.c

@@ -3205,7 +3205,7 @@ send_ctl_resize_q (struct lsquic_send_ctl *ctl, struct lsquic_packets_tailq *q,
     unsigned count_src = 0, count_dst = 0;
     int idx;
 
-#ifdef MSVC
+#ifdef _MSC_VER
     idx = 0;
 #endif
 

tests/test_packet_resize.c

@@ -8,7 +8,11 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/queue.h>
+#ifndef WIN32
 #include <unistd.h>
+#else
+#include "getopt.h"
+#endif
 
 #define LSQUIC_TEST 1
 #include "lsquic.h"