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41 lines
986 B
41 lines
986 B
package sdp
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import (
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"bytes"
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"errors"
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"github.com/jart/gosip/util"
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)
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// Origin represents the session origin (o=) line of an SDP. Who knows what
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// this is supposed to do.
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type Origin struct {
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User string // first value in o= line
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ID string // second value in o= line
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Version string // third value in o= line
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Addr string // tracks ip of original user-agent
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}
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func (origin *Origin) Append(b *bytes.Buffer) error {
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if origin.ID == "" {
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return errors.New("sdp missing origin id")
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}
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if origin.Version == "" {
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return errors.New("sdp missing origin version")
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}
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if origin.Addr == "" {
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return errors.New("sdp missing origin address")
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}
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if origin.User == "" {
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origin.User = "-"
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}
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b.WriteString("o=")
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b.WriteString(origin.User + " ")
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b.WriteString(origin.ID + " ")
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b.WriteString(origin.Version)
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if util.IsIPv6(origin.Addr) {
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b.WriteString(" IN IP6 " + origin.Addr + "\r\n")
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} else {
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b.WriteString(" IN IP4 " + origin.Addr + "\r\n")
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}
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return nil
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}
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