added java example
This commit is contained in:
Joseph Henry
185
examples/cpp/simple.cpp
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185
examples/cpp/simple.cpp
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// Comprehensive stress test for socket-like API
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include "ZeroTierSDK.h"
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int main()
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{
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char *nwid = (char *)"e5cd7a9e1c0fd272";
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// Get ZeroTier core version
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char ver[ZT_VER_STR_LEN];
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zts_core_version(ver);
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printf("zts_core_version = %s\n", ver);
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// Get SDK version
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zts_sdk_version(ver);
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printf("zts_sdk_version = %s\n", ver);
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// Spawns a couple threads to support ZeroTier core, userspace network stack, and generates ID in ./zt
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zts_start("./zt");
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// Print the device/app ID (this is also the ID you'd see in ZeroTier Central)
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char id[ZT_ID_LEN + 1];
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zts_get_device_id(id);
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printf("id = %s\n", id);
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// Get the home path of this ZeroTier instance, where we store identity keys, conf files, etc
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char homePath[ZT_HOME_PATH_MAX_LEN+1];
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zts_get_homepath(homePath, ZT_HOME_PATH_MAX_LEN);
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printf("homePath = %s\n", homePath);
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// Wait for ZeroTier service to start
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while(!zts_service_running()) {
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printf("wating for service to start\n");
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sleep(1);
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}
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// Join a network
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zts_join_network(nwid);
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// Wait for ZeroTier service to issue an address to the device on the given network
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while(!zts_has_address("e5cd7a9e1c0fd272")) {
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printf("waiting for service to issue an address\n");
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sleep(1);
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}
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// Begin Socket API calls
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int err;
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int sockfd;
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int port = 7878;
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struct sockaddr_in addr;
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// socket()
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if((sockfd = zts_socket(AF_INET, SOCK_STREAM, 0)) < 0)
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printf("error creating ZeroTier socket");
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else
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printf("sockfd = %d\n", sockfd);
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// connect() IPv6
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if(false)
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{
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struct hostent *server = gethostbyname2("fde5:cd7a:9e1c:0fd2:7299:9367:5993:3b86",AF_INET6);
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struct sockaddr_in6 serv_addr;
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memset((char *) &serv_addr, 0, sizeof(serv_addr));
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serv_addr.sin6_flowinfo = 0;
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serv_addr.sin6_family = AF_INET6;
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memmove((char *) &serv_addr.sin6_addr.s6_addr, (char *) server->h_addr, server->h_length);
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serv_addr.sin6_port = htons( port );
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if((err = zts_connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr))) < 0) {
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printf("error connecting to remote host (%d)\n", err);
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return -1;
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}
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}
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// connect() IPv4
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if(true)
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{
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addr.sin_addr.s_addr = inet_addr("10.9.9.20");
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addr.sin_family = AF_INET;
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addr.sin_port = htons( port );
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if((err = zts_connect(sockfd, (const struct sockaddr *)&addr, sizeof(addr))) < 0) {
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printf("error connecting to remote host (%d)\n", err);
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return -1;
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}
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zts_write(sockfd, "hello", 5);
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sleep(3);
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zts_close(sockfd);
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}
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// bind() ipv4
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if(false)
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{
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//addr.sin_addr.s_addr = INADDR_ANY; // TODO: Requires significant socket multiplexer work
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addr.sin_addr.s_addr = inet_addr("10.9.9.40");
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addr.sin_family = AF_INET;
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addr.sin_port = htons( port );
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if((err = zts_bind(sockfd, (const struct sockaddr *)&addr, sizeof(addr))) < 0) {
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printf("error binding to interface (%d)\n", err);
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return -1;
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}
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zts_listen(sockfd, 1);
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struct sockaddr_in client;
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int c = sizeof(struct sockaddr_in);
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int accept_fd = zts_accept(sockfd, (struct sockaddr *)&client, (socklen_t*)&c);
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printf("reading from buffer\n");
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char newbuf[32];
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memset(newbuf, 0, 32);
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read(accept_fd, newbuf, 20);
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printf("newbuf = %s\n", newbuf);
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}
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// End Socket API calls
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// Get the ipv4 address assigned for this network
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char addr_str[ZT_MAX_IPADDR_LEN];
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zts_get_ipv4_address(nwid, addr_str, ZT_MAX_IPADDR_LEN);
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printf("ipv4 = %s\n", addr_str);
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zts_get_ipv6_address(nwid, addr_str, ZT_MAX_IPADDR_LEN);
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printf("ipv6 = %s\n", addr_str);
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printf("peer_count = %lu\n", zts_get_peer_count());
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while(1)
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{
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sleep(1);
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}
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// ---
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/*
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"Tap Multiplexer"
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- socket() [BEFORE JOIN]: take requests for new sockets
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- Create them, and store them in a temporary holding space until we find out where we should assign them
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- connect():
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- Search SocketTaps for tap with a relevant route
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- None? -> ENETUNREACH
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- Found?
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- Assign previously-held socket to this tap
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- Attempt connection
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- bind():
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- bind on all Interfaces?
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Join Semantics
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- Create : SocketTap
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- Create : rpc.d/nwid unix domain socket (if intercept mode?)
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- Create : Stack Interface
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- Provide : IPs to Interface
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/--- int0: 10. 9.0.0
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stack ---- int1: 172.27.0.0
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\--- int2: ?
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*/
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// zts_join("other_network"); // 10.9.0.0
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// zts_join("whatever"); // 172.27.0.0
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//zts_socket(AF, STREAM, 0);
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//zts_connect("10.9.9.5");
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// ---
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// Stop service, delete tap interfaces, and network stack
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zts_stop();
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return 0;
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}
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