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Ensure building and running on non-IPv6 capable hosts works

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* src/process.c (Fmake_network_process) [AF_INET6]: Only build ::1
localhost when IPv6 is supported.
(Fnetwork_lookup_address_info) [AF_INET6]: Move check for Qipv6 inside
ifdef, since its definition depends on AF_INET6.  Don't return IPv6
addresses when they're not supported.

* test/src/process-tests.el (lookup-family-specification,
lookup-google): Only do IPv6 lookup if IPv6 is supported.
This commit is contained in:
Robert Pluim 2019-11-07 16:16:39 +01:00
parent 8232325337
commit 063277c5ec
2 changed files with 22 additions and 13 deletions
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24
src/process.c
View File

@ -4015,9 +4015,11 @@ usage: (make-network-process &rest ARGS) */)
if (family != AF_LOCAL)
#endif
{
#ifdef AF_INET6
if (family == AF_INET6)
host = build_string ("::1");
else
#endif
host = build_string ("127.0.0.1");
}
}
@ -4027,9 +4029,11 @@ usage: (make-network-process &rest ARGS) */)
{
/* Depending on setup, "localhost" may map to different IPv4 and/or
IPv6 addresses, so it's better to be explicit (Bug#6781). */
#ifdef AF_INET6
if (family == AF_INET6)
host = build_string ("::1");
else
#endif
host = build_string ("127.0.0.1");
}
CHECK_STRING (host);
@ -4622,7 +4626,8 @@ DEFUN ("network-lookup-address-info", Fnetwork_lookup_address_info,
Optional parameter FAMILY controls whether to look up IPv4 or IPv6
addresses. The default of nil means both, symbol `ipv4' means IPv4
only, symbol `ipv6' means IPv6 only. Returns a list of addresses, or
nil if none were found. Each address is a vector of integers. */)
nil if none were found. Each address is a vector of integers, as per
the description of ADDRESS in `make-network-process'. */)
(Lisp_Object name, Lisp_Object family)
{
Lisp_Object addresses = Qnil;
@ -4636,12 +4641,9 @@ nil if none were found. Each address is a vector of integers. */)
hints.ai_family = AF_UNSPEC;
else if (EQ (family, Qipv4))
hints.ai_family = AF_INET;
else if (EQ (family, Qipv6))
#ifdef AF_INET6
else if (EQ (family, Qipv6))
hints.ai_family = AF_INET6;
#else
/* If we don't support IPv6, querying will never work anyway */
return addresses;
#endif
else
error ("Unsupported lookup type");
@ -4653,9 +4655,15 @@ nil if none were found. Each address is a vector of integers. */)
else
{
for (lres = res; lres; lres = lres->ai_next)
addresses = Fcons (conv_sockaddr_to_lisp (lres->ai_addr,
lres->ai_addrlen),
addresses);
{
#ifndef AF_INET6
if (lres->ai_family != AF_INET)
continue;
#endif
addresses = Fcons (conv_sockaddr_to_lisp (lres->ai_addr,
lres->ai_addrlen),
addresses);
}
addresses = Fnreverse (addresses);
freeaddrinfo (res);

11
test/src/process-tests.el
View File

@ -337,7 +337,8 @@ See Bug#30460."
(skip-unless (not (getenv "EMACS_HYDRA_CI")))
(should-error (network-lookup-address-info "google.com" 'both))
(should (network-lookup-address-info "google.com" 'ipv4))
(should (network-lookup-address-info "google.com" 'ipv6)))
(when (featurep 'make-network-process '(:family ipv6))
(should (network-lookup-address-info "google.com" 'ipv6))))
(ert-deftest lookup-unicode-domains ()
"Unicode domains should fail"
@ -354,11 +355,11 @@ See Bug#30460."
"Check that we can look up google IP addresses"
(skip-unless (not (getenv "EMACS_HYDRA_CI")))
(let ((addresses-both (network-lookup-address-info "google.com"))
(addresses-v4 (network-lookup-address-info "google.com" 'ipv4))
(addresses-v6 (network-lookup-address-info "google.com" 'ipv6)))
(addresses-v4 (network-lookup-address-info "google.com" 'ipv4)))
(should addresses-both)
(should addresses-v4)
(should addresses-v6)))
(should addresses-v4))
(when (featurep 'make-network-process '(:family ipv6))
(should (network-lookup-address-info "google.com" 'ipv6))))
(ert-deftest non-existent-lookup-failure ()
(skip-unless (not (getenv "EMACS_HYDRA_CI")))