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Better error message if panic occurs during iptables-save output parsing

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This commit is contained in:
Marko Lukša 2019-05-28 11:38:27 +02:00
parent b49d429f64
commit df23697ae7
1 changed files with 5 additions and 1 deletions
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6
pkg/util/iptables/save_restore.go
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@ -61,7 +61,11 @@ func GetChainLines(table Table, save []byte) map[Chain][]byte {
} else if line[0] == ':' && len(line) > 1 { } else if line[0] == ':' && len(line) > 1 {
// We assume that the <line> contains space - chain lines have 3 fields, // We assume that the <line> contains space - chain lines have 3 fields,
// space delimited. If there is no space, this line will panic. // space delimited. If there is no space, this line will panic.
chain := Chain(line[1:bytes.Index(line, spaceBytes)]) spaceIndex := bytes.Index(line, spaceBytes)
if spaceIndex == -1 {
panic(fmt.Sprintf("Unexpected chain line in iptables-save output: %v", string(line)))
}
chain := Chain(line[1:spaceIndex])
chainsMap[chain] = line chainsMap[chain] = line
} }
} }