1*6777b538SAndroid Build Coastguard Worker // Copyright 2022 The Chromium Authors 2*6777b538SAndroid Build Coastguard Worker // Use of this source code is governed by a BSD-style license that can be 3*6777b538SAndroid Build Coastguard Worker // found in the LICENSE file. 4*6777b538SAndroid Build Coastguard Worker 5*6777b538SAndroid Build Coastguard Worker #ifndef NET_HTTP_ALTERNATE_PROTOCOL_USAGE_H_ 6*6777b538SAndroid Build Coastguard Worker #define NET_HTTP_ALTERNATE_PROTOCOL_USAGE_H_ 7*6777b538SAndroid Build Coastguard Worker 8*6777b538SAndroid Build Coastguard Worker namespace net { 9*6777b538SAndroid Build Coastguard Worker 10*6777b538SAndroid Build Coastguard Worker // The reason why Chrome uses a specific transport protocol for HTTP semantics. 11*6777b538SAndroid Build Coastguard Worker enum AlternateProtocolUsage { 12*6777b538SAndroid Build Coastguard Worker // Alternate Protocol was used without racing a normal connection. 13*6777b538SAndroid Build Coastguard Worker ALTERNATE_PROTOCOL_USAGE_NO_RACE = 0, 14*6777b538SAndroid Build Coastguard Worker // Alternate Protocol was used by winning a race with a normal connection. 15*6777b538SAndroid Build Coastguard Worker ALTERNATE_PROTOCOL_USAGE_WON_RACE = 1, 16*6777b538SAndroid Build Coastguard Worker // Alternate Protocol was not used by losing a race with a normal connection. 17*6777b538SAndroid Build Coastguard Worker ALTERNATE_PROTOCOL_USAGE_MAIN_JOB_WON_RACE = 2, 18*6777b538SAndroid Build Coastguard Worker // Alternate Protocol was not used because no Alternate-Protocol information 19*6777b538SAndroid Build Coastguard Worker // was available when the request was issued, but an Alternate-Protocol header 20*6777b538SAndroid Build Coastguard Worker // was present in the response. 21*6777b538SAndroid Build Coastguard Worker ALTERNATE_PROTOCOL_USAGE_MAPPING_MISSING = 3, 22*6777b538SAndroid Build Coastguard Worker // Alternate Protocol was not used because it was marked broken. 23*6777b538SAndroid Build Coastguard Worker ALTERNATE_PROTOCOL_USAGE_BROKEN = 4, 24*6777b538SAndroid Build Coastguard Worker // HTTPS DNS protocol upgrade job was used without racing with a normal 25*6777b538SAndroid Build Coastguard Worker // connection and an Alternate Protocol job. 26*6777b538SAndroid Build Coastguard Worker ALTERNATE_PROTOCOL_USAGE_DNS_ALPN_H3_JOB_WON_WITHOUT_RACE = 5, 27*6777b538SAndroid Build Coastguard Worker // HTTPS DNS protocol upgrade job won a race with a normal connection and 28*6777b538SAndroid Build Coastguard Worker // an Alternate Protocol job. 29*6777b538SAndroid Build Coastguard Worker ALTERNATE_PROTOCOL_USAGE_DNS_ALPN_H3_JOB_WON_RACE = 6, 30*6777b538SAndroid Build Coastguard Worker // This value is used when the reason is unknown and also used as the default 31*6777b538SAndroid Build Coastguard Worker // value. 32*6777b538SAndroid Build Coastguard Worker ALTERNATE_PROTOCOL_USAGE_UNSPECIFIED_REASON = 7, 33*6777b538SAndroid Build Coastguard Worker // Maximum value for the enum. 34*6777b538SAndroid Build Coastguard Worker ALTERNATE_PROTOCOL_USAGE_MAX, 35*6777b538SAndroid Build Coastguard Worker }; 36*6777b538SAndroid Build Coastguard Worker 37*6777b538SAndroid Build Coastguard Worker } // namespace net 38*6777b538SAndroid Build Coastguard Worker 39*6777b538SAndroid Build Coastguard Worker #endif // NET_HTTP_ALTERNATE_PROTOCOL_USAGE_H_ 40