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#include <netdb.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
/// Tries to create, bind and start listening on INET server socket.
/// \param node Hostname
/// \param service Port
/// \return File descriptor of the socket or -1 in case of an error
/// \see getaddrinfo(3)
// TODO: Handle UNIX sockets
int make_server(const char * node, const char * service)
{
struct addrinfo hints = {
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_STREAM,
.ai_flags = AI_PASSIVE,
};
struct addrinfo * result;
struct addrinfo * it;
if (0 != getaddrinfo(node, service, &hints, &result))
{
return -1; // TODO: Handle errors properly
}
int server;
for (it = result; it != NULL; it = it->ai_next)
{
server = socket(it->ai_family, it->ai_socktype, it->ai_protocol);
if (-1 == server)
continue;
if (0 == bind(server, it->ai_addr,it->ai_addrlen))
break;
close(server);
}
if (it == NULL)
{
server = -1; // TODO: Handle errors properly
}
freeaddrinfo(result);
if (-1 == server || -1 == listen(server, 5))
{
return -1; // TODO: Handle errors properly
}
return server;
}
/// Standard entry point for the program.
/// \param argc Argument count
/// \param argv Argument array
/// \return Error code
int main(int argc, char ** argv)
{
if (2 != argc)
{
return 4;
}
int server = make_server(NULL, argv[1]);
int client;
static const char * response =
"HTTP/1.1 200 OK\r\n"
"Content-Type: text/plain; charset=utf-8\r\n"
"\r\n"
"plop\n";
for (;;)
{
if (-1 != (client = accept(server, NULL, NULL)))
{
if (-1 == send(client, response, strlen(response), 0))
{
// TODO: Handle errors properly
}
// Ignore the close-related error mess.
close(client);
}
}
}
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