147 lines
3.7 KiB
Go
147 lines
3.7 KiB
Go
package sdp
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import (
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"fmt"
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"net/url"
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"strconv"
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)
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// SessionDescription is a a well-defined format for conveying sufficient
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// information to discover and participate in a multimedia session.
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type SessionDescription struct {
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// v=0
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// https://tools.ietf.org/html/rfc4566#section-5.1
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Version Version
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// o=<username> <sess-id> <sess-version> <nettype> <addrtype> <unicast-address>
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// https://tools.ietf.org/html/rfc4566#section-5.2
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Origin Origin
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// s=<session name>
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// https://tools.ietf.org/html/rfc4566#section-5.3
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SessionName SessionName
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// i=<session description>
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// https://tools.ietf.org/html/rfc4566#section-5.4
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SessionInformation *Information
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// u=<uri>
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// https://tools.ietf.org/html/rfc4566#section-5.5
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URI *url.URL
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// e=<email-address>
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// https://tools.ietf.org/html/rfc4566#section-5.6
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EmailAddress *EmailAddress
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// p=<phone-number>
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// https://tools.ietf.org/html/rfc4566#section-5.6
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PhoneNumber *PhoneNumber
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// c=<nettype> <addrtype> <connection-address>
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// https://tools.ietf.org/html/rfc4566#section-5.7
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ConnectionInformation *ConnectionInformation
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// b=<bwtype>:<bandwidth>
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// https://tools.ietf.org/html/rfc4566#section-5.8
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Bandwidth []Bandwidth
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// https://tools.ietf.org/html/rfc4566#section-5.9
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// https://tools.ietf.org/html/rfc4566#section-5.10
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TimeDescriptions []TimeDescription
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// z=<adjustment time> <offset> <adjustment time> <offset> ...
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// https://tools.ietf.org/html/rfc4566#section-5.11
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TimeZones []TimeZone
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// k=<method>
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// k=<method>:<encryption key>
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// https://tools.ietf.org/html/rfc4566#section-5.12
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EncryptionKey *EncryptionKey
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// a=<attribute>
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// a=<attribute>:<value>
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// https://tools.ietf.org/html/rfc4566#section-5.13
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Attributes []Attribute
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// https://tools.ietf.org/html/rfc4566#section-5.14
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MediaDescriptions []*MediaDescription
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}
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// Attribute returns the value of an attribute and if it exists
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func (s *SessionDescription) Attribute(key string) (string, bool) {
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for _, a := range s.Attributes {
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if a.Key == key {
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return a.Value, true
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}
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}
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return "", false
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}
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// Version describes the value provided by the "v=" field which gives
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// the version of the Session Description Protocol.
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type Version int
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func (v Version) String() string {
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return strconv.Itoa(int(v))
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}
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// Origin defines the structure for the "o=" field which provides the
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// originator of the session plus a session identifier and version number.
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type Origin struct {
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Username string
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SessionID uint64
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SessionVersion uint64
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NetworkType string
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AddressType string
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UnicastAddress string
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}
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func (o Origin) String() string {
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return fmt.Sprintf(
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"%v %d %d %v %v %v",
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o.Username,
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o.SessionID,
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o.SessionVersion,
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o.NetworkType,
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o.AddressType,
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o.UnicastAddress,
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)
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}
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// SessionName describes a structured representations for the "s=" field
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// and is the textual session name.
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type SessionName string
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func (s SessionName) String() string {
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return string(s)
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}
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// EmailAddress describes a structured representations for the "e=" line
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// which specifies email contact information for the person responsible for
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// the conference.
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type EmailAddress string
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func (e EmailAddress) String() string {
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return string(e)
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}
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// PhoneNumber describes a structured representations for the "p=" line
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// specify phone contact information for the person responsible for the
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// conference.
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type PhoneNumber string
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func (p PhoneNumber) String() string {
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return string(p)
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}
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// TimeZone defines the structured object for "z=" line which describes
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// repeated sessions scheduling.
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type TimeZone struct {
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AdjustmentTime uint64
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Offset int64
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}
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func (z TimeZone) String() string {
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return strconv.FormatUint(z.AdjustmentTime, 10) + " " + strconv.FormatInt(z.Offset, 10)
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}
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