Hello,
I am new to Genode and currently writing a program in which two
components communicate with each other over virtual ethernet. The
communication using a NIC router works completely fine if started from
the main component, but fails whenever initiated from a thread. Hereby
Error: pthread_self() called from alien thread named 'Broker Thread'
no RM attachment (READ pf_addr=0x4b8 pf_ip=0x10f62dfc from pager_object:
pd='init -> manager' thread='Broker Thread')
is thrown when the 'connect' function is called. I have tried resolving
this by simply allocating some RAM and also by initializing a sliced
heap, both to no avail. Unfortunately it is imperative for the component
to initialize a connection from within a thread. Therefore I would be
very grateful for any help regarding this issue. I have attached the
thread's code to this mail.
Kind regards,
Kevin Burton
struct Broker_thread : public Genode::Thread {
private:
Libc::Env &_env;
Genode::Ram_dataspace_capability &_capability;
Genode::uint8_t _ipv4[4];
Genode::uint16_t _port;
void entry() override {
Libc::with_libc([&] () {
struct sockaddr_in sockaddr = { };
int fd;
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
Genode::log("Socket initialization failed");
return;
}
sockaddr.sin_family = AF_INET;
sockaddr.sin_port = htons(_port);
std::string ip = std::to_string(_ipv4[0]) + "." + std::to_string(_ipv4[1]) + "." + std::to_string(_ipv4[2]) + "." + std::to_string(_ipv4[3]);
sockaddr.sin_addr.s_addr = inet_addr(ip.c_str());
Genode::log("Connecting to ", ip.c_str(), ":", _port);
if (connect(fd, (struct sockaddr *) &sockaddr, sizeof sockaddr) < 0) {
Genode::log("Socket connection failed");
return;
}
});
}
public:
Broker_thread(Libc::Env &env, const Genode::uint8_t ipv4[4], Genode::uint16_t port, Genode::Ram_dataspace_capability &capability)
: Thread(env, "Broker Thread", 1024 * 16), _env(env), _capability(capability), _port(port) {
for (int i = 0; i < 4; i++) _ipv4[i] = ipv4[i];
}
~Broker_thread() { };
};
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