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gh-114917: add support for AI_NUMERICSERV in getaddrinfo emulation #114918

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Mar 18, 2025
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5 changes: 4 additions & 1 deletion Lib/test/test_socket.py
Original file line number Diff line number Diff line change
Expand Up @@ -1662,8 +1662,11 @@ def testGetaddrinfo(self):
# Issue #6697.
self.assertRaises(UnicodeEncodeError, socket.getaddrinfo, 'localhost', '\uD800')

# Issue 17269: test workaround for OS X platform bug segfault
if hasattr(socket, 'AI_NUMERICSERV'):
self.assertRaises(socket.gaierror, socket.getaddrinfo, "localhost", "http",
flags=socket.AI_NUMERICSERV)

# Issue 17269: test workaround for OS X platform bug segfault
try:
# The arguments here are undefined and the call may succeed
# or fail. All we care here is that it doesn't segfault.
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Add support for AI_NUMERICSERV in getaddrinfo emulation
4 changes: 3 additions & 1 deletion Modules/addrinfo.h
Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,7 @@
#undef AI_PASSIVE
#undef AI_CANONNAME
#undef AI_NUMERICHOST
#undef AI_NUMERICSERV
#undef AI_MASK
#undef AI_ALL
#undef AI_V4MAPPED_CFG
Expand All @@ -88,8 +89,9 @@
#define AI_PASSIVE 0x00000001 /* get address to use bind() */
#define AI_CANONNAME 0x00000002 /* fill ai_canonname */
#define AI_NUMERICHOST 0x00000004 /* prevent name resolution */
#define AI_NUMERICSERV 0x00000008 /* prevent service resolution */
/* valid flags for addrinfo */
#define AI_MASK (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST)
#define AI_MASK (AI_PASSIVE | AI_CANONNAME | AI_NUMERICHOST | AI_NUMERICSERV)

#define AI_ALL 0x00000100 /* IPv6 and IPv4-mapped (with AI_V4MAPPED) */
#define AI_V4MAPPED_CFG 0x00000200 /* accept IPv4-mapped if kernel supports */
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4 changes: 4 additions & 0 deletions Modules/getaddrinfo.c
Original file line number Diff line number Diff line change
Expand Up @@ -351,6 +351,10 @@ getaddrinfo(const char*hostname, const char*servname,
struct servent *sp;
const char *proto;

if (ai->ai_flags & AI_NUMERICSERV) {
ERR(EAI_NONAME);
}

proto = NULL;
switch (pai->ai_socktype) {
case GAI_ANY:
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