src/client/client_auth.c

   1 #include <stddef.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <linenoise/linenoise.h>
   5 #include "client.h"
   6 #include "client_auth.h"
   7 #include "interrupt.h"
   8 #include "types.h"
   9
  10 struct ClientAuth client_auth;
  11
  12 #include <string.h>
  13 static void auth_loop()
  14 {
  15         while (!interrupt.set) switch (client_auth.state) {
  16                 case AUTH_INIT:
  17                         if (client_auth.name)
  18                                 linenoiseFree(client_auth.name);
  19
  20                         if (!(client_auth.name = linenoise("Enter name: ")))
  21                                 return;
  22
  23                         printf("[access] authenticating as %s...\n", client_auth.name);
  24                         client_auth.state = AUTH_WAIT;
  25
  26                         dragonnet_peer_send_ToServerAuth(client, &(ToServerAuth) {
  27                                 .name = client_auth.name,
  28                         });
  29
  30                         __attribute__((fallthrough));
  31
  32                 case AUTH_WAIT:
  33                         pthread_cond_wait(&client_auth.cv, &client_auth.mtx);
  34                         break;
  35
  36                 case AUTH_SUCCESS:
  37                         return;
  38         }
  39 }
  40
  41 void client_auth_init()
  42 {
  43         client_auth.name = NULL;
  44         pthread_cond_init(&client_auth.cv, NULL);
  45         pthread_mutex_init(&client_auth.mtx, NULL);
  46
  47         pthread_mutex_lock(&client_auth.mtx);
  48         client_auth.state = AUTH_INIT;
  49         flag_sub(&interrupt, &client_auth.cv); // make sure Ctrl+C will work during AUTH_WAIT
  50
  51         auth_loop();
  52
  53         flag_uns(&interrupt, &client_auth.cv);
  54
  55         if (client_auth.state != AUTH_SUCCESS) {
  56                 fprintf(stderr, "[error] authentication failed due to interruption or read failure\n");
  57                 abort();
  58         }
  59
  60         pthread_mutex_unlock(&client_auth.mtx);
  61 }
  62
  63 void client_auth_deinit()
  64 {
  65         pthread_cond_destroy(&client_auth.cv);
  66         pthread_mutex_destroy(&client_auth.mtx);
  67         linenoiseFree(client_auth.name);
  68 }