All curl requests gets the error "ssloc inet_ntop() failed"

Hello all,

This is curl 8.6.0 just installed on HP-UX. *Every* connection attempt gets the same error:

     curl: (7) ssloc inet_ntop() failed with errno 225: Address family not supported by protocol family

Note that every connection request ALSO reports an error trying to set TCP_NODELAY. The reference to "ssloc" seems to imply an interaction with openssl could be the culprit, but I don't know how to debug the internals of curl.

Here's an example:

# curl -v -o ms.html https://www.microsoft.com/
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0* Host www.microsoft.com:443 was resolved.
* IPv6: (none)
* IPv4: 23.200.197.152
*   Trying 23.200.197.152:443...
* Could not set TCP_NODELAY: Invalid argument
* ssloc inet_ntop() failed with errno 225: Address family not supported by protocol family
* ssloc inet_ntop() failed with errno 225: Address family not supported by protocol family
* connect to 23.200.197.152 port 443 from  port 0 failed: Invalid argument
* Failed to connect to www.microsoft.com port 443 after 128 ms: Couldn't connect to server
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
* Closing connection
curl: (7) ssloc inet_ntop() failed with errno 225: Address family not supported by protocol family

===============================================

Output of curl --version

curl 8.6.0 (ia64-hp-hpux11.31) libcurl/8.6.0 OpenSSL/3.0.12 zlib/1.3.1 zstd/1.5.5 libidn2/2.3.4 libssh2/1.11.0 OpenLDAP/2.6.6
Release-Date: 2024-01-31
Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns ldap ldaps mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: alt-svc AsynchDNS HSTS HTTPS-proxy IDN IPv6 Largefile libz NTLM SSL threadsafe TLS-SRP UnixSockets zstd
===============================================

The inability to set TCP_NODELAY is one possible issue, since the most recent versions of curl enabled that as a default.

I ran curl under the 'tusc' command to see if any system calls could help.  Here's a subset of that output - Note the errno #22 EINVAL to the TCP_NODELAY option:

gettimeofday(0x9fffffffffffe910, NULL) ............................................................................... = 0
socket(AF_INET, SOCK_STREAM, 6) ...................................................................................... = 7
write(2, "*   ", 2) .................................................................................................. = 2
write(2, "    T r y i n g   1 5 9 . 2 5 3 ".., 30) ................................................................... = 30
setsockopt(7, 0x6, TCP_NODELAY, 0x9fffffffffffe820, 8) ............................................................... ERR#22 EINVAL
write(2, "*   ", 2) .................................................................................................. = 2
write(2, "C o u l d   n o t   s e t   T C ".., 44) ................................................................... = 44
setsockopt(7, SOL_SOCKET, SO_KEEPALIVE, 0x9fffffffffffe910, 4) ....................................................... = 0
setsockopt(7, 0x6, 0x3, 0x9fffffffffffe910, 4) ....................................................................... = 0
setsockopt(7, 0x6, 0x4, 0x9fffffffffffe910, 4) ....................................................................... = 0
fcntl(7, F_GETFL, 0) ................................................................................................. = 2
fcntl(7, F_SETFL, 65538) ............................................................................................. = 0
connect(7, 0x6000000000029738, 16) ................................................................................... ERR#245 EINPROGRESS
getsockname(7, 0x9fffffffffffe720, 0x9fffffffffffe710) ............................................................... = 0
write(2, "*   ", 2) .................................................................................................. = 2
write(2, "s s l o c   i n e t _ n t o p ( ".., 89) ................................................................... = 89
gettimeofday(0x9fffffffffffea40, NULL) ............................................................................... = 0
sigaction(SIGPIPE, 0x9fffffffffffeab0, NULL) ......................................................................... = 0
gettimeofday(0x9fffffffffffea10, NULL) ............................................................................... = 0
poll(0x9fffffffffffeaa0, 2, 49) ...................................................................................... = 0


1. Is anyone else seeing this error in their environment?

2. Any ideas for me on how to debug or resolve the issue?

__________________________
William Barto
CTO Data Transformation Corp.
[email protected]

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