Created
August 7, 2024 17:52
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| // Maybe https://stackoverflow.com/questions/67274905/c-c-resolving-docker-compose-services-to-same-ip can help | |
| // https://man7.org/linux/man-pages/man3/getaddrinfo.3.html | |
| template <class F> | |
| bool getaddr(const char* host, const char* service, F&& f) | |
| { | |
| addrinfo hints{}; | |
| addrinfo* result; | |
| //hints.ai_family = AF_UNSPEC; /* Allow IPv4 or IPv6 */ | |
| hints.ai_family = PF_INET; /* Allow IPv4 or IPv6 */ | |
| hints.ai_socktype = SOCK_DGRAM; /* Datagram socket */ | |
| hints.ai_flags = AI_PASSIVE; /* For wildcard IP address */ | |
| hints.ai_protocol = 0; /* Any protocol */ | |
| hints.ai_canonname = NULL; | |
| hints.ai_addr = NULL; | |
| hints.ai_next = NULL; | |
| int ret = getaddrinfo(host, service, &hints, &result); | |
| if(ret != 0) | |
| { | |
| std::cerr << gai_strerror(ret) << std::endl; | |
| return false; | |
| //exit(-1); | |
| } | |
| for(const addrinfo* i = result; i != nullptr; i = i->ai_next) | |
| { | |
| f(*i); | |
| } | |
| freeaddrinfo(result); | |
| return true; | |
| } |
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