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// SPDX-License-Identifier: MIT |
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|
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#include <Threads.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include "net.h" |
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#include "util.h" |
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#include "dbuf.h" |
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|
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#define OT_CHECK(x) \ |
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{ \ |
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OTResult _m_res = (x); \ |
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if (_m_res < 0) \ |
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die("OT Error at %s:%d: %ld", \ |
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__FILE__, __LINE__, _m_res); \ |
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} \ |
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|
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#define kConnectionTimeoutSecs 2 |
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|
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static bool gOTInited = false; |
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static InetSvcRef inet_svcs; |
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|
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static OTResult SetFourByteOption(EndpointRef ep, |
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OTXTILevel level, OTXTIName name, UInt32 value); |
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|
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/* Look up the IPv4 address of a given host using DNS. */ |
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short net_dns_lookup(const char* hostname, InetHost *host) |
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{ |
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InetHostInfo hi; |
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memset(&hi, 0, sizeof(InetHostInfo)); |
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|
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if (OTInetStringToAddress(inet_svcs, (char*)hostname, &hi) < 0) |
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return -1; |
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|
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*host = hi.addrs[0]; |
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return 0; |
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} |
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|
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void net_init() |
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{ |
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OSStatus err = noErr; |
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OT_CHECK(InitOpenTransport()); |
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|
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// docs say you should be able to use |
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// nil as a first parameter, but at least |
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// OT 1.1 does _not_ like that. |
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inet_svcs = OTOpenInternetServices( |
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kDefaultInternetServicesPath, 0, &err); |
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|
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OT_CHECK(err); |
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gOTInited = true; |
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} |
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|
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EndpointRef net_create_endpoint() |
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{ |
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EndpointRef ep; |
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OSStatus err = noErr; |
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|
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ep = OTOpenEndpoint( |
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OTCreateConfiguration("tcp"), |
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0, NULL, &err); |
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|
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OT_CHECK(err); |
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OT_CHECK(OTSetSynchronous(ep)); |
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OT_CHECK(OTSetBlocking(ep)); |
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OT_CHECK(OTBind(ep, nil, nil)); |
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OT_CHECK(OTSetNonBlocking(ep)); |
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|
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/* Set reasonable connection timeout (2s) */ |
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|
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OT_CHECK(SetFourByteOption(ep, INET_TCP, TCP_CONN_ABORT_THRESHOLD, |
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kConnectionTimeoutSecs * 1000)); |
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OT_CHECK(SetFourByteOption(ep, INET_TCP, TCP_CONN_NOTIFY_THRESHOLD, |
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(kConnectionTimeoutSecs * 1000 / 2))); |
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|
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return ep; |
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} |
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|
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short net_wait_readable(EndpointRef ep) |
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{ |
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OTResult res; |
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|
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while (true) |
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{ |
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res = OTLook(ep); |
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switch (res) |
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{ |
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case T_DATA: |
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return 0; // readable |
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case T_DISCONNECT: |
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warn("net_wait_readable: unorderly disconnect"); |
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OT_CHECK(OTRcvDisconnect(ep, nil)); |
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return -1; |
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case T_ORDREL: |
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OTRcvOrderlyDisconnect(ep); |
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OTSndOrderlyDisconnect(ep); |
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return -1; |
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case kOTNoError: |
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// nothing doing |
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break; |
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default: |
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warn("unhandled OTLook result: %x (%d)", res, res); |
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break; |
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} |
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YieldToAnyThread(); |
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} |
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} |
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|
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EndpointRef net_connect(const char* hostname, short port) |
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{ |
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EndpointRef ep = net_create_endpoint(); |
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TCall connectCall; |
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InetAddress addr; |
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InetHost host; |
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|
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if (net_dns_lookup(hostname, &host) < 0) |
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goto fail; |
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|
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OTInitInetAddress(&addr, port, host); |
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|
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OTMemzero(&connectCall, sizeof(TCall)); |
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|
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connectCall.addr.buf = (unsigned char*)&addr; |
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connectCall.addr.len = sizeof(InetAddress); |
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|
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if (OTConnect(ep, &connectCall, nil) < 0) |
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goto fail; |
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|
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return ep; |
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|
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fail: |
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OTCloseProvider(ep); |
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return NULL; |
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} |
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|
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EndpointRef |
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net_socks_connect( |
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const char* proxy_host, short proxy_port, |
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const char* host, short port) |
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{ |
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EndpointRef ep; |
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OTResult res; |
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char hello[] = "\x05\x01\x00"; // SOCKSv5, 1 auth method, 00 = no auth |
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long host_len = strlen(host); |
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unsigned char req[384]; |
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unsigned char respBuf[384]; |
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short idx = 0; |
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OTFlags flags; |
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|
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ep = net_connect(proxy_host, proxy_port); |
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if (!ep) |
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return NULL; |
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|
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if (host_len > 253) |
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die("invalid host %s; too long!", host); |
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|
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req[idx++] = 5; // SOCKSv5 |
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req[idx++] = 1; // CMD 1: CONNECT |
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req[idx++] = 0; // reserved |
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req[idx++] = 3; // Address type: DNS |
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|
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req[idx++] = (unsigned char)host_len; // Length of DNS address |
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|
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memcpy(&req[idx], host, host_len); |
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idx += host_len; |
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|
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// 68K and PPC are big-endian, so port |
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// is already in network byte order |
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*((short*)&req[idx]) = port; |
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idx += 2; |
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|
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res = OTSnd(ep, hello, sizeof(hello), 0); |
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OT_CHECK(res); |
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|
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OTSetBlocking(ep); |
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res = OTRcv(ep, respBuf, 2, &flags); |
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|
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if (respBuf[0] != 5 || respBuf[1] != 0) |
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die("invalid response: %d %d", respBuf[0], respBuf[1]); |
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|
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res = OTSnd(ep, req, idx, 0); |
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OT_CHECK(res); |
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|
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res = OTRcv(ep, respBuf, 4, &flags); |
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if (respBuf[0] != 5 || respBuf[1] != 0 || respBuf[3] != 1) |
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die("invalid response: %d %d %d", respBuf[0], respBuf[1], respBuf[3]); |
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|
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res = OTRcv(ep, respBuf + 4, 6, &flags); |
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|
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OTSetNonBlocking(ep); |
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|
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return ep; |
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} |
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|
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static void net_recv_response(EndpointRef ep, struct dbuf* db) |
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{ |
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OTResult res; |
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OTFlags flags; |
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char tmpBuf[256]; |
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|
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while (true) |
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{ |
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short readable = net_wait_readable(ep); |
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if (readable == -1) break; |
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else if (readable == 0) |
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{ |
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res = OTRcv(ep, tmpBuf, sizeof(tmpBuf), &flags); |
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if (res < 0) |
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die("readable socket returned error on read? %ld", res); |
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db_extend(db, (u8*)tmpBuf, res); |
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} |
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} |
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|
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// null-terminate response |
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db_extend(db, (u8*)"\0", 1); |
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} |
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|
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struct dbuf net_post(EndpointRef ep, const char* path, const char* token, const char* content) |
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{ |
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size_t content_length = strlen(content); |
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DB_INIT(db, 8192); |
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OTResult res; |
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|
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db_printf(&db, "POST %s HTTP/1.1\r\n" |
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"Authorization: Bearer %s\r\n" |
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"Host: homeassistant.lan\r\n" |
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"Connection: close\r\n" |
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"Content-Type: application/json\r\n" |
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"Content-Length: %lu\r\n" |
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"\r\n%s\r\n", path, token, content_length, content); |
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|
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res = OTSnd(ep, (void*)&db.buf[0], db.len, 0); |
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OT_CHECK(res); |
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|
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db_clear(&db); |
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|
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net_recv_response(ep, &db); |
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return db; |
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} |
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|
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struct dbuf net_get(EndpointRef ep, const char* path, const char* token) |
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{ |
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OTResult res; |
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DB_INIT(db, 8192); |
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|
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db_printf(&db, "GET %s HTTP/1.1\r\n" |
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"Authorization: Bearer %s\r\n" |
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"Host: homeassistant.lan\r\n" |
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"Connection: close\r\n" |
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"\r\n", path, token); |
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|
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res = OTSnd(ep, (void*)&db.buf[0], db.len, 0); |
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OT_CHECK(res); |
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|
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db_clear(&db); |
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|
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net_recv_response(ep, &db); |
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return db; |
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} |
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|
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/* Get a pointer to the content in an HTTP response. */ |
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char* net_http_response_content(const char* response) |
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{ |
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char* s = strstr(response, "\r\n\r\n"); |
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if (!s) |
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return NULL; |
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return s + 4; |
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} |
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|
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short net_test_socks() |
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{ |
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EndpointRef ep = net_socks_connect("192.168.1.187", 1080, "httpbin.org", 443); |
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struct dbuf respBuf; |
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|
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if (!ep) |
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return -1; |
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|
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respBuf = net_get(ep, "/uuid", ""); |
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|
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info("%s", respBuf.buf); |
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db_destroy(&respBuf); |
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OTCloseProvider(ep); |
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|
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return 0; |
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} |
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|
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/* Taken from the OT sample code here: |
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* https://lists.apple.com/archives/macnetworkprog/2004/Jan/msg00145.html |
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*/ |
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static OTResult SetFourByteOption(EndpointRef ep, |
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OTXTILevel level, OTXTIName name, UInt32 value) |
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// level and name must denote a four byte option that is |
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// appropriate for the endpoint ep. This routine sets the |
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// option to value. ep is assumed to be in synchronous |
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// mode. |
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// |
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// If all goes well, the result is noErr. If an error |
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// occurs, the result is negative. If the option could not |
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// be negotiated, a positive result being one of (T_FAILURE, |
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// T_PARTSUCCESS, T_READONLY, T_NOTSUPPORT) is returned |
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{ |
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OTResult err; |
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TOption option; |
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TOptMgmt request; |
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TOptMgmt result; |
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// Set up the option buffer to reflect the specific option |
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// and value we want to set. We use a TOption structure |
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// to represent the option buffer. TOption is specifically |
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// defined to allow easy construction of 4 byte options. |
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// If you want to negotiate different size options, or |
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// multiple options in a single call, then constructing |
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// the option buffer is a little trickier |
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option.len = kOTFourByteOptionSize; |
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option.level = level; |
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option.name = name; |
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option.status = 0; |
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option.value[0] = value; |
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|
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// Set up the request for OTOptionManagement to point |
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// to the option buffer we just filled out, and tell |
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// it that we want to negotiate (ie set) the option. |
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request.opt.buf = (UInt8 *) &option; |
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request.opt.len = sizeof(option); |
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request.flags = T_NEGOTIATE; |
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|
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// Set up the reply for OTOptionManagement. This is where |
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// OTOptionManagement puts the result of the negotiation. |
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result.opt.buf = (UInt8 *) &option; |
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result.opt.maxlen = sizeof(option); |
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|
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// Call OTOptionManagement and then check that the value |
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// was negotiated successfully. Any value other than |
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// T_SUCCESS is reported via the error result. |
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err = OTOptionManagement(ep, &request, &result); |
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|
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if (err == noErr) { |
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if (option.status != T_SUCCESS) { |
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err = option.status; |
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} |
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} |
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|
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return (err); |
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} |
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|
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void net_fini() |
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{ |
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if (gOTInited) |
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{ |
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OTCloseProvider(inet_svcs); |
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CloseOpenTransport(); |
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} |
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} |