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58 lines
1.4 KiB
58 lines
1.4 KiB
// Copyright 2020 Justine Alexandra Roberts Tunney
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sip
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import (
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"bytes"
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"fmt"
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)
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type MsgIncompleteError struct {
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Msg []byte
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}
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func (err MsgIncompleteError) Error() string {
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return fmt.Sprintf("Incomplete SIP message:\n%s", err.Msg)
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}
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type MsgParseError struct {
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Msg []byte
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Offset int
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}
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func (err MsgParseError) Error() string {
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lines := bytes.Split(err.Msg, []byte("\r\n"))
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var b bytes.Buffer
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o := 0
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line := 0
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lineOffset := 0
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for i := 0; i < len(lines); i++ {
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b.Write(lines[i])
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if o <= err.Offset && err.Offset < o+len(lines[i]) {
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line = i + 1
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lineOffset = err.Offset - o
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b.WriteByte('\n')
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for j := 0; j < lineOffset; j++ {
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b.WriteByte(' ')
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}
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b.WriteByte('^')
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}
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o += len(lines[i]) + 2
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if i < len(lines)-1 {
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b.WriteByte('\n')
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}
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}
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return fmt.Sprintf("Error in SIP message at line %d offset %d:\n%s", line, lineOffset, b.String())
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}
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