fwp/mngr/fwp_mngr.c

   1 #define CONFIGURE_FWP_MY_STREAM_ID 3000
   2 #define CONFIGURE_FWP_MNGR_ADDR "127.0.0.1"
   3
   4 #include "fwp_confdefs.h"
   5 #include "fwp.h"
   6
   7 #include "fwp_contract_table.h"
   8 #include "fwp_participant_table.h"
   9 #include "fwp_admctrl.h"
  10 #include "fwp_mngt.h"
  11
  12 #define FWP_MTU         2346
  13 #define BUFFSIZE        FWP_MTU
  14
  15 /* buffer and socket for incomming message */
  16 static unsigned char    buffer[FWP_MTU];
  17
  18 /* Admission control test */
  19 fwp_admctrl_test_t fwp_admctrl_test = &fwp_admctrl_stupid;
  20
  21 /**
  22  * fwp_mngt_input
  23  *
  24  * Function waits for remote or local message
  25  *
  26  * @msgb  received message
  27  * \return
  28  * On success, it returns 0 and the pointer to received message in msgb parameter.
  29  * On error, it returns negative error code
  30  *
  31  */
  32 int fwp_mngr_input(struct fwp_msgb **pmsgb)
  33 {
  34         struct fwp_msgb *msgb;
  35         ssize_t size;
  36
  37         FWP_DEBUG("Waiting for messages\n");
  38         /* TODO: consider to replace with fwp_mngt_recv call */
  39         size = fwp_recv(fwp_participant_this->epointd, buffer, BUFFSIZE, 0);
  40
  41         /* For future: fwp_socket could be allocated behind data in msgb*/
  42         if (!(msgb = fwp_msgb_alloc(size))) {
  43                 perror("No memory available.\n");
  44                 return -ENOMEM;
  45         }
  46         /*memcpy(fwp_msgb_put(msgb, len), buffer, len); */
  47         msgb->data = buffer;
  48         fwp_msgb_put(msgb, size);
  49
  50         *pmsgb = msgb;
  51         return (0);
  52 }
  53
  54 void fwp_mngr_hello(fwp_msgb_t *msgb, fwp_participant_id_t participant_id)
  55 {
  56         fwp_participant_info_t participant_info, my_info;
  57         fwp_participant_t *participant;
  58         fwp_endpoint_attr_t attr;
  59
  60         FWP_DEBUG("Received HELLO msg from nodeid= %d appid= %d\n",
  61                         participant_id.node_id, participant_id.app_id);
  62
  63         fwp_endpoint_attr_init(&attr);
  64         fwp_endpoint_attr_setreliability(&attr, FWP_MNGT_RELIABILITY);
  65         /* Create a new participant */
  66         fwp_msg_hello_out(msgb->data, &participant_info);
  67         participant = fwp_participant_new(&participant_info);
  68         fwp_mngt_service_vres_create(&participant->vresd);
  69         fwp_send_endpoint_create(participant->id.node_id, participant->stream_id,
  70                                         &attr, &participant->epointd);
  71         fwp_send_endpoint_bind(participant->epointd, participant->vresd);
  72         fwp_contract_table_init(&participant->contract_table);
  73
  74         /* Insert participant into table */
  75         fwp_participant_table_insert(participant);
  76
  77         /* Send back hello msg with mngr`s info */
  78         /* prepare hello message */
  79         fwp_msgb_reset_data(msgb);
  80         fwp_msgb_reserve(msgb, sizeof(struct fwp_msg_header));
  81
  82         my_info.id = fwp_participant_this->id;
  83         my_info.stream_id = fwp_participant_this->stream_id;
  84
  85         fwp_msg_hello_in(msgb->tail, &my_info);
  86         fwp_msgb_put(msgb, sizeof(struct fwp_msg_hello));
  87
  88         /* Send hello to manager */
  89         fwp_mngt_send(FWP_MSG_HELLO, msgb,
  90                         fwp_participant_this, participant);
  91
  92         FWP_DEBUG("Sent HELLO msg from nodeid= %d appid= %d\n",
  93                         participant_id.node_id, participant_id.app_id);
  94 }
  95
  96 int fwp_mngr_bye(fwp_msgb_t *msgb, fwp_participant_id_t participant_id)
  97 {
  98         fwp_participant_t *participant;
  99
 100         /* Find participant */
 101         if (!(participant = fwp_participant_table_find(&participant_id))){
 102                 return -EPERM;
 103         }
 104
 105         fwp_participant_table_delete(participant);
 106         fwp_send_endpoint_unbind(participant->epointd);
 107         fwp_endpoint_destroy(participant->epointd);
 108         fwp_vres_destroy(participant->vresd);
 109         /* TODO: iterate through contract table and delete contracts */
 110         fwp_participant_delete(participant);
 111
 112         FWP_DEBUG("BYE nodeid = %d appid = %d\n", participant_id.node_id,
 113                         participant_id.app_id);
 114
 115         return 0;
 116 }
 117
 118 int
 119 fwp_mngr_contract_reserve(fwp_msgb_t *msgb, fwp_participant_id_t participant_id)
 120 {
 121         fwp_participant_t *participant;
 122         fwp_contract_data_t *contdata;
 123
 124         /* Find participant */
 125         if (!(participant = fwp_participant_table_find(&participant_id))){
 126                 return -EPERM;
 127         }
 128
 129         contdata = fwp_contract_data_new();
 130
 131         /* Extract contract header */
 132         fwp_msg_contracthdr_out(msgb->data, &contdata->id, &contdata->status);
 133         fwp_msgb_pull(msgb, sizeof(struct fwp_msg_contracthdr));
 134         /* Extract contract params */
 135         fwp_msg_contract_out(msgb->data, &contdata->contract);
 136         fwp_msgb_pull(msgb, sizeof(struct fwp_msg_contract));
 137
 138         /*launch admission test */
 139         fwp_admctrl_test(contdata);
 140
 141         free(msgb);
 142         msgb = fwp_msgb_alloc(sizeof(struct fwp_msg_header) +
 143                                         sizeof(struct fwp_msg_contract) +
 144                                         sizeof(struct fwp_msg_vres_params));
 145         fwp_msgb_reserve(msgb,sizeof(struct fwp_msg_header));
 146
 147         /*Add contract header*/
 148         fwp_msg_contracthdr_in(msgb->tail, contdata->id, contdata->status);
 149         fwp_msgb_put(msgb, sizeof(struct fwp_msg_contracthdr));
 150         /* Add contract params */
 151         /* No needed to send back if spare capacity is not considered
 152          * fwp_msg_contract_in(msgb->tail, &contdata->contract);
 153          * fwp_msgb_put(msgb, sizeof(struct fwp_msg_contract));
 154          * */
 155
 156         /*Send back contract reservation */
 157         if (contdata->status == FWP_CONT_RESERVED) {
 158                 fwp_msg_vres_params_in(msgb->tail, &contdata->vres_params);
 159                 FWP_DEBUG("Sent vres params budget=%d period=%d ac=%d\n",
 160                                 contdata->vres_params.budget,
 161                                 contdata->vres_params.period_usec,
 162                                 contdata->vres_params.ac_id);
 163                 fwp_msgb_put(msgb, sizeof(struct fwp_msg_vres_params));
 164                 /* Add contract to contract table */
 165                 fwp_contract_table_insert(&participant->contract_table,contdata);
 166                 FWP_DEBUG("Contract id=%d stored in table\n", contdata->id);
 167
 168         } else {
 169                 free(contdata);
 170         }
 171
 172         fwp_mngt_send(FWP_MSG_RESERVE, msgb,
 173                         fwp_participant_this, participant);
 174         return 0;
 175 }
 176
 177 int
 178 fwp_mngr_contract_commit(fwp_msgb_t *msgb, fwp_participant_id_t participant_id)
 179 {
 180         fwp_participant_t *participant;
 181         fwp_contract_data_t *contdata;
 182         fwp_contract_id_t  id;
 183         fwp_contract_status_t  status;
 184
 185         /* Find participant */
 186         if (!(participant = fwp_participant_table_find(&participant_id))){
 187                 return -EPERM;
 188         }
 189
 190         fwp_msg_contracthdr_out(msgb->data, &id, &status);
 191         fwp_msgb_pull(msgb, sizeof(struct fwp_msg_contracthdr));
 192         FWP_DEBUG("Contract id=%d to commit\n", id);
 193
 194         contdata = fwp_contract_table_find(&participant->contract_table, id);
 195         contdata->status = FWP_CONT_NEGOTIATED;
 196
 197         return 0;
 198 }
 199
 200 int
 201 fwp_mngr_contract_cancel(fwp_msgb_t *msgb, fwp_participant_id_t participant_id)
 202 {
 203         fwp_participant_t *participant;
 204         fwp_contract_data_t *contdata;
 205         fwp_contract_id_t  id;
 206         fwp_contract_status_t  status;
 207
 208         /* Find participant */
 209         if (!(participant = fwp_participant_table_find(&participant_id))){
 210                 return -EPERM;
 211         }
 212
 213         fwp_msg_contracthdr_out(msgb->data, &id, &status);
 214         fwp_msgb_pull(msgb, sizeof(struct fwp_msg_contracthdr));
 215
 216         contdata = fwp_contract_table_find(&participant->contract_table, id);
 217         contdata->status = FWP_CONT_NOTNEGOTIATED;
 218         /* release vres - success only for local vres */
 219         fwp_vres_destroy(contdata->vresd);
 220         /* delete contract from contract table */
 221         fwp_contract_table_delete(&participant->contract_table, contdata);
 222         fwp_contract_destroy(contdata);
 223
 224         FWP_DEBUG("Contract id=%d to canceled\n", id);
 225
 226         return 0;
 227 }
 228
 229 void fwp_mngr_msg_handler(fwp_msgb_t *msgb)
 230 {
 231         fwp_msg_type_t msg_type;
 232         fwp_participant_id_t    participant_id;
 233
 234         fwp_msg_header_out(msgb->data, &msg_type, &participant_id);
 235         fwp_msgb_pull(msgb, sizeof(struct fwp_msg_header));
 236
 237         switch (msg_type) {
 238                 case  FWP_MSG_HELLO:
 239                         FWP_DEBUG("Message HELLO received from nodeid = %d "
 240                                   "appid = %d\n", participant_id.node_id,
 241                                         participant_id.app_id);
 242                         fwp_mngr_hello(msgb, participant_id);
 243                         break;
 244
 245                 case  FWP_MSG_BYE:
 246                         FWP_DEBUG("Message BYE received from nodeid = %d "
 247                                   "appid = %d\n", participant_id.node_id,
 248                                         participant_id.app_id);
 249                         fwp_mngr_bye(msgb, participant_id);
 250                         break;
 251
 252
 253                 case  FWP_MSG_RESERVE:
 254                         FWP_DEBUG("Message RESERVE received from nodeid = %d "
 255                                   "appid = %d\n", participant_id.node_id,
 256                                         participant_id.app_id);
 257                         fwp_mngr_contract_reserve(msgb, participant_id);
 258                         break;
 259
 260                 case  FWP_MSG_COMMIT:
 261                         FWP_DEBUG("Message COMMIT received from nodeid = %d "
 262                                   "appid = %d\n", participant_id.node_id,
 263                                         participant_id.app_id);
 264                         fwp_mngr_contract_commit(msgb, participant_id);
 265                         break;
 266
 267                 case  FWP_MSG_CANCEL:
 268                         FWP_DEBUG("Message CANCEL received from nodeid = %d "
 269                                   "appid = %d\n", participant_id.node_id,
 270                                         participant_id.app_id);
 271                         fwp_mngr_contract_cancel(msgb, participant_id);
 272                         break;
 273
 274                 default:
 275                         printf("Invalid message\n.");
 276                         fwp_msgb_free(msgb);
 277         }
 278 }
 279
 280 void fwp_mngr_main_loop()
 281 {
 282         struct fwp_msgb *msgb;
 283
 284         /* start admission control thread */
 285         while (1 /*exit_flag*/){
 286                 fwp_mngr_input(&msgb);
 287                 if (msgb)
 288                         fwp_mngr_msg_handler(msgb);
 289                 FWP_DEBUG("Mngr waiting for next msg.\n");
 290         }
 291 }
 292
 293 int main()
 294 {
 295         if (fwp_init()) {
 296                 fprintf(stderr,"FWP manager initialization failed.\n");
 297                 exit(1);
 298         }
 299
 300         fwp_mngr_main_loop();
 301
 302         return 0;
 303 }