英文:
Opening a pfring from Go: pfring NewRing error: no such device
问题
我想在Debian 11上使用github.com/google/gopacket/pfring包从Go代码中调用pf_ring，但无法在Debian 11上使其正常工作（我的代码在Debian 10上可以工作）。
这是我的Go代码：
package main
import (
"github.com/google/gopacket/pfring"
"log"
)
func main() {
_, err := pfring.NewRing("eno1@0", 1574, pfring.FlagPromisc|pfring.Flag(1<<14))
if err == nil {
log.Printf("Success!")
return
}
log.Fatalf("Failure: %s", err)
}
当我运行它时：
# ./test-go
2023/01/24 10:12:25 Failure: pfring NewRing error: no such device
显然，eno1接口是存在的：
# pf_ringcfg --list-interfaces
Name: eno1 Driver: i40e RSS: 12 [Supported by ZC]
Name: enp3s0f1 Driver: i40e RSS: 12 [Supported by ZC]
Name: enx0a229512eeb9 Driver: cdc_ether RSS: 1 [Linux Driver]
奇怪的是，相同的C代码可以工作：
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <pfring.h>
int main() {
pfring* ring = pfring_open("eno1@0", 1574, PF_RING_PROMISC | PF_RING_ZC_NOT_REPROGRAM_RSS);
if (ring != NULL) {
printf("Success!\n");
exit(0);
}
int e = errno;
char* msg = strerror(e);
printf("Failure %d: %s\n", e, msg);
exit(1);
}
# ./test-c
Success!
有什么想法吗？
英文:
I want to call pf_ring from Go code using the github.com/google/gopacket/pfring package and cannot get it working on a Debian 11 (my code is working on Debian 10).
This is my Go code:
package main
import (
"github.com/google/gopacket/pfring"
"log"
)
func main() {
_, err := pfring.NewRing("eno1@0", 1574, pfring.FlagPromisc|pfring.Flag(1<<14))
if err == nil {
log.Printf("Success!")
return
}
log.Fatalf("Failure: %s", err)
}
And when I run it:
# ./test-go
2023/01/24 10:12:25 Failure: pfring NewRing error: no such device
Obviously the eno1 interface exists:
# pf_ringcfg --list-interfaces
Name: eno1 Driver: i40e RSS: 12 [Supported by ZC]
Name: enp3s0f1 Driver: i40e RSS: 12 [Supported by ZC]
Name: enx0a229512eeb9 Driver: cdc_ether RSS: 1 [Linux Driver]
The odd thing is that the same code written in C works:
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <pfring.h>
int main() {
pfring* ring = pfring_open("eno1@0", 1574, PF_RING_PROMISC | PF_RING_ZC_NOT_REPROGRAM_RSS);
if (ring != NULL) {
printf("Success!\n");
exit(0);
}
int e = errno;
char* msg = strerror(e);
printf("Failure %d: %s\n", e, msg);
exit(1);
}
# ./test-c
Success!
Any idea?
答案1
得分: 0
这是gopacket/pfring中的一个错误，详见问题 #147和修复。该库调用pfring_open时没有报告错误，但是库错误地解释了返回代码。
英文:
It turns out this is a bug in gopacket/pfring, see issue #147 and the fix. The call to pfring_open made by this library reported no error, but the library misinterpreted the return code.
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