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diff src/core/ngx_connection.c @ 9094:afebde21cb32 quic

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QUIC: disabled datagram fragmentation. As per RFC 9000, Section 14: UDP datagrams MUST NOT be fragmented at the IP layer.
author Roman Arutyunyan <arut@nginx.com>
date Sat, 06 May 2023 16:23:27 +0400
parents af5adec171b4
children adcc6d8acfd4
line wrap: on
line diff
--- a/src/core/ngx_connection.c
+++ b/src/core/ngx_connection.c
@@ -1010,6 +1010,78 @@ ngx_configure_listening_sockets(ngx_cycl
         }
 
 #endif
+
+#if (NGX_HAVE_IP_MTU_DISCOVER)
+
+        if (ls[i].quic && ls[i].sockaddr->sa_family == AF_INET) {
+            value = IP_PMTUDISC_DO;
+
+            if (setsockopt(ls[i].fd, IPPROTO_IP, IP_MTU_DISCOVER,
+                           (const void *) &value, sizeof(int))
+                == -1)
+            {
+                ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno,
+                              "setsockopt(IP_MTU_DISCOVER) "
+                              "for %V failed, ignored",
+                              &ls[i].addr_text);
+            }
+        }
+
+#elif (NGX_HAVE_IP_DONTFRAG)
+
+        if (ls[i].quic && ls[i].sockaddr->sa_family == AF_INET) {
+            value = 1;
+
+            if (setsockopt(ls[i].fd, IPPROTO_IP, IP_DONTFRAG,
+                           (const void *) &value, sizeof(int))
+                == -1)
+            {
+                ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno,
+                              "setsockopt(IP_DONTFRAG) "
+                              "for %V failed, ignored",
+                              &ls[i].addr_text);
+            }
+        }
+
+#endif
+
+#if (NGX_HAVE_INET6)
+
+#if (NGX_HAVE_IPV6_MTU_DISCOVER)
+
+        if (ls[i].quic && ls[i].sockaddr->sa_family == AF_INET6) {
+            value = IPV6_PMTUDISC_DO;
+
+            if (setsockopt(ls[i].fd, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
+                           (const void *) &value, sizeof(int))
+                == -1)
+            {
+                ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno,
+                              "setsockopt(IPV6_MTU_DISCOVER) "
+                              "for %V failed, ignored",
+                              &ls[i].addr_text);
+            }
+        }
+
+#elif (NGX_HAVE_IP_DONTFRAG)
+
+        if (ls[i].quic && ls[i].sockaddr->sa_family == AF_INET6) {
+            value = 1;
+
+            if (setsockopt(ls[i].fd, IPPROTO_IPV6, IPV6_DONTFRAG,
+                           (const void *) &value, sizeof(int))
+                == -1)
+            {
+                ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_socket_errno,
+                              "setsockopt(IPV6_DONTFRAG) "
+                              "for %V failed, ignored",
+                              &ls[i].addr_text);
+            }
+        }
+
+#endif
+
+#endif
     }
 
     return;