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net: report IsNotFound when getnameinfo returns EAI_NONAME

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Fixes #57548

Change-Id: I4092624b1e906fbcd520f43aa4bc71c144dea3b6
GitHub-Last-Rev: ab04835947
GitHub-Pull-Request: golang/go#57549
Reviewed-on: https://go-review.googlesource.com/c/go/+/460255
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Mateusz Poliwczak 2023-01-31 18:38:01 +00:00 committed by Gopher Robot
parent 780db9a63d
commit de2efc2aa1
1 changed files with 5 additions and 1 deletions
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6
src/net/cgo_unix.go
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@ -260,17 +260,21 @@ func cgoLookupAddrPTR(addr string, sa *_C_struct_sockaddr, salen _C_socklen_t) (
} }
} }
if gerrno != 0 { if gerrno != 0 {
isErrorNoSuchHost := false
isTemporary := false isTemporary := false
switch gerrno { switch gerrno {
case _C_EAI_SYSTEM: case _C_EAI_SYSTEM:
if err == nil { // see golang.org/issue/6232 if err == nil { // see golang.org/issue/6232
err = syscall.EMFILE err = syscall.EMFILE
} }
case _C_EAI_NONAME:
err = errNoSuchHost
isErrorNoSuchHost = true
default: default:
err = addrinfoErrno(gerrno) err = addrinfoErrno(gerrno)
isTemporary = addrinfoErrno(gerrno).Temporary() isTemporary = addrinfoErrno(gerrno).Temporary()
} }
return nil, &DNSError{Err: err.Error(), Name: addr, IsTemporary: isTemporary} return nil, &DNSError{Err: err.Error(), Name: addr, IsTemporary: isTemporary, IsNotFound: isErrorNoSuchHost}
} }
for i := 0; i < len(b); i++ { for i := 0; i < len(b); i++ {
if b[i] == 0 { if b[i] == 0 {