github.com/inspektor-gadget/inspektor-gadget@v0.28.1/pkg/gadgets/helpers_all.go (about)

     1  // Copyright 2023-2024 The Inspektor Gadget authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // This file contains generic helpers that are not specific to an operating system nor architecture.
    16  
    17  package gadgets
    18  
    19  import (
    20  	"fmt"
    21  	"syscall"
    22  )
    23  
    24  func ProtoString(proto int) string {
    25  	// proto definitions:
    26  	// https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
    27  	protoStr := fmt.Sprintf("UNKNOWN#%d", proto)
    28  	switch proto {
    29  	case syscall.IPPROTO_TCP:
    30  		protoStr = "TCP"
    31  	case syscall.IPPROTO_UDP:
    32  		protoStr = "UDP"
    33  	}
    34  	return protoStr
    35  }
    36  
    37  func FromCString(in []byte) string {
    38  	for i := 0; i < len(in); i++ {
    39  		if in[i] == 0 {
    40  			return string(in[:i])
    41  		}
    42  	}
    43  	return string(in)
    44  }
    45  
    46  func FromCStringN(in []byte, length int) string {
    47  	l := len(in)
    48  	if length < l {
    49  		l = length
    50  	}
    51  
    52  	for i := 0; i < l; i++ {
    53  		if in[i] == 0 {
    54  			return string(in[:i])
    55  		}
    56  	}
    57  	return string(in[:l])
    58  }