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bpo-40280: Disable AF_UNIX, AF_PACKET, SO_REUSE* on Emscripten (#31829)
Emscripten's socket emulation is limited. AF_UNIX, AF_PACKET, setsockopt(), and most SO_* constants are not supported.
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@ -465,9 +465,9 @@ def server_bind(self):
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May be overridden.
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"""
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if self.allow_reuse_address:
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if self.allow_reuse_address and hasattr(socket, "SO_REUSEADDR"):
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self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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if self.allow_reuse_port:
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if self.allow_reuse_port and hasattr(socket, "SO_REUSEPORT"):
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self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
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self.socket.bind(self.server_address)
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self.server_address = self.socket.getsockname()
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@ -7933,7 +7933,7 @@ PyInit__socket(void)
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#ifdef IPPROTO_VRRP
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PyModule_AddIntMacro(m, IPPROTO_VRRP);
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#endif
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#if defined(IPPROTO_SCTP) && !defined(__EMSCRIPTEN__)
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#ifdef IPPROTO_SCTP
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PyModule_AddIntMacro(m, IPPROTO_SCTP);
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#endif
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#ifdef IPPROTO_BIP
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@ -192,6 +192,21 @@ typedef int socklen_t;
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#endif /* HAVE_SOCKADDR_ALG */
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#ifdef __EMSCRIPTEN__
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// wasm32-emscripten sockets only support subset of IPv4 and IPv6.
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// SCTP protocol crashes runtime.
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#ifdef IPPROTO_SCTP
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# undef IPPROTO_SCTP
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#endif
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// setsockopt() fails with ENOPROTOOPT, getsockopt only supports SO_ERROR.
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// undef SO_REUSEADDR and SO_REUSEPORT so they cannot be used.
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#ifdef SO_REUSEADDR
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# undef SO_REUSEADDR
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#endif
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#ifdef SO_REUSEPORT
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# undef SO_REUSEPORT
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#endif
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#endif // __EMSCRIPTEN__
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#ifndef Py__SOCKET_H
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#define Py__SOCKET_H
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@ -74,8 +74,10 @@ ac_cv_func_posix_fallocate=no
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ac_cv_func_utimensat=no
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ac_cv_header_sys_ioctl_h=no
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# sockets are supported, but only in non-blocking mode
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# ac_cv_header_sys_socket_h=no
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# sockets are supported, but only AF_INET / AF_INET6 in non-blocking mode.
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# Disable AF_UNIX and AF_PACKET support, see socketmodule.h.
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ac_cv_header_sys_un_h=no
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ac_cv_header_netpacket_packet_h=no
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# aborts with bad ioctl
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ac_cv_func_openpty=no
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