12/28/2022 0 Comments Diffserv sip definition![]()
PJ_DECL(pj_status_t) pj_sock_set_qos_type(pj_sock_t sock, ![]() There are two sets of API provided to manipulate the QoS parameters. The standard mapping between the classes above to the corresponding Layer 2 and 3 settings are as follows: The traffic classes above will determine how the Layer 2 and 3 QoS settings will be used. #DIFFSERV SIP DEFINITION PORTABLE#The objective of this ticket is to add new API to PJLIB socket API to enable manipulation of the QoS parameters above in a uniform and portable manner.īased on the above, the following API is proposed.ĭeclare the following "standard" traffic types. qWAVE supports this as well.īoth DSCP and WMM is supported via RSocket::SetOpt() with will set both Layer 2 and Layer 3 QoS settings accordingly. WMM is available for mobile platforms on Windows Mobile 6 platform and Windows Embedded CE 6, via setsockopt(IP_DSCP_TRAFFIC_TYPE). IEEE 802.1p tagging is available via Traffic Control (TC) API, available on Windows XP SP2, but this needs administrator access. On Vista and Windows 7, the is a new QoS2 API, also known as Quality Windows Audio-Video Experience (qWAVE). On Windows 2000, Windows XP, and Windows Server 2003, GQoS (Generic QoS) API is the standard API, but this API may not be supported in the future. Set PJ_QOS_IMPLEMENTATION to PJ_QOS_BSD to enable the use of sock_qos_bsd.c.ģ) In our test, setting SO_PRIORITY showed no error, but wireshark traffic revealed that it's not set.Įthernet 802.1p tagging is done by setting setsockopt(SO_PRIORITY) option of the socket, then with the set_egress_map option of the vconfig utility to convert this to set vlan-qos field of the packet.ĭSCP is settable with setsockopt() on Windows 2000 or older, but Windows would silently ignore this call on WinXP or later, unless administrator modifies the registry. ![]() PJLIB) cannot directly change the DSCP and WMM prio settings.ġ) Via PJSUA2 API TransportConfig, fields qosType and qosParams.Ģ) On win32, sock_qos_dummy.c is used by default. For example, on Windows Mobile 6 (WM6), both DSCP and WMM priority can be changed by the OS, but these settings are applied based on IP_DSCP_TRAFFIC_TYPE and user (i.e. Whether that setting can be controlled programmatically depends on "XXX is user settable" row. "XXX is supported" row shows whether the OS is able to set that QoS setting. The following table summarizes the availability/accessability of various QoS settings on platforms that PJSIP supports. Other mechanisms exist (such as RSVP, IntServ) but this will not be implemented. As defined in RFC 2472, the DSCP value is the high-order 6 bits of the IP version 4 (IPv4) TOS field and the IP version 6 (IPv6) Traffic Class field. #DIFFSERV SIP DEFINITION CODE#Wireless access points (APs) must have WMM enabled.Īt the Internet layer, you can use Differentiated Services/Diffserv and set the value of the Differentiated Services Code Point (DSCP) in the IP header. #DIFFSERV SIP DEFINITION DRIVERS#Host support for WMM prioritization requires that both wireless network adapters and their drivers support WMM. These access categories are (in order of highest to lowest priority) voice, video, best-effort, and background. ![]() The VLAN header is placed inside the Ethernet header, between the Source Address field and either the Length field (for an IEEE 802.3 frame) or the EtherType field (for an Ethernet II frame).Īt the Network Interface layer for IEEE 802.11 wireless, the Wi-Fi Alliance certification for Wi-Fi Multimedia (WMM) defines four access categories for prioritizing network traffic. IEEE 802.1p tagging will mark frames sent by a host for prioritized delivery using a 3-bit Priority field in the virtual local area network (VLAN) header of the Ethernet frame. QoS settings are available for both Layer 2 and Layer 3 of TCP/IP protocols: #DIFFSERV SIP DEFINITION HOW TO#This article describes the QoS support in PJSIP and how to use it. ![]()
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