31 lines
1.2 KiB
C++
31 lines
1.2 KiB
C++
// Copyright (C) 2020 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <dlfcn.h>
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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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static int (*real_bind)(int sockfd, const sockaddr* addr, socklen_t addrlen) =
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(int (*)(int, const sockaddr*, socklen_t))dlsym(RTLD_NEXT, "bind");
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extern "C" int bind(int sockfd, const sockaddr* addr, socklen_t addrlen) {
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if (addr->sa_family != AF_INET) return real_bind(sockfd, addr, addrlen);
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const sockaddr_in* sin = (const sockaddr_in*)addr;
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if (sin->sin_addr.s_addr != 0) return real_bind(sockfd, addr, addrlen);
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sockaddr_in new_sin = *sin;
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new_sin.sin_addr.s_addr = 0x0100007f;
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return real_bind(sockfd, (sockaddr*)&new_sin, addrlen);
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}
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