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_create(&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
  97 fwp_mngr_contract_reserve(fwp_msgb_t *msgb, fwp_participant_id_t participant_id)
  98 {
  99         fwp_participant_t *participant;
 100         fwp_contract_data_t *contdata;
 101
 102         /* Find participant */
 103         if (!(participant = fwp_participant_table_find(&participant_id))){
 104                 return -EPERM;
 105         }
 106
 107         contdata = fwp_contract_data_new();
 108
 109         /* Extract contract header */
 110         fwp_msg_contracthdr_out(msgb->data, &contdata->id, &contdata->status);
 111         fwp_msgb_pull(msgb, sizeof(struct fwp_msg_contracthdr));
 112         /* Extract contract params */
 113         fwp_msg_contract_out(msgb->data, &contdata->contract);
 114         fwp_msgb_pull(msgb, sizeof(struct fwp_msg_contract));
 115
 116         /*launch admission test */
 117         fwp_admctrl_test(contdata);
 118
 119         free(msgb);
 120         msgb = fwp_msgb_alloc(sizeof(struct fwp_msg_header) +
 121                                         sizeof(struct fwp_msg_contract) +
 122                                         sizeof(struct fwp_msg_vres_params));
 123         fwp_msgb_reserve(msgb,sizeof(struct fwp_msg_header));
 124
 125         /*Add contract header*/
 126         fwp_msg_contracthdr_in(msgb->tail, contdata->id, contdata->status);
 127         fwp_msgb_put(msgb, sizeof(struct fwp_msg_contracthdr));
 128         /* Add contract params */
 129         /* No needed to send back if spare capacity is not considered
 130          * fwp_msg_contract_in(msgb->tail, &contdata->contract);
 131          * fwp_msgb_put(msgb, sizeof(struct fwp_msg_contract));
 132          * */
 133
 134         /*Send back contract reservation */
 135         if (contdata->status == FWP_CONT_RESERVED) {
 136                 fwp_msg_vres_params_in(msgb->tail, &contdata->vres_params);
 137                 FWP_DEBUG("Sent vres params budget=%d period=%d ac=%d\n",
 138                                 contdata->vres_params.budget,
 139                                 contdata->vres_params.period_usec,
 140                                 contdata->vres_params.ac_id);
 141                 fwp_msgb_put(msgb, sizeof(struct fwp_msg_vres_params));
 142                 /* Add contract to contract table */
 143                 fwp_contract_table_insert(&participant->contract_table,contdata);
 144                 FWP_DEBUG("Contract id=%d stored in table\n", contdata->id);
 145
 146         } else {
 147                 free(contdata);
 148         }
 149
 150         fwp_mngt_send(FWP_MSG_RESERVE, msgb,
 151                         fwp_participant_this, participant);
 152         return 0;
 153 }
 154
 155 int
 156 fwp_mngr_contract_commit(fwp_msgb_t *msgb, fwp_participant_id_t participant_id)
 157 {
 158         fwp_participant_t *participant;
 159         fwp_contract_data_t *contdata;
 160         fwp_contract_id_t  id;
 161         fwp_contract_status_t  status;
 162
 163         /* Find participant */
 164         if (!(participant = fwp_participant_table_find(&participant_id))){
 165                 return -EPERM;
 166         }
 167
 168         fwp_msg_contracthdr_out(msgb->data, &id, &status);
 169         fwp_msgb_pull(msgb, sizeof(struct fwp_msg_contracthdr));
 170         FWP_DEBUG("Contract id=%d to commit\n", id);
 171
 172         contdata = fwp_contract_table_find(&participant->contract_table, id);
 173         contdata->status = FWP_CONT_NEGOTIATED;
 174
 175         return 0;
 176 }
 177
 178 void fwp_mngr_msg_handler(fwp_msgb_t *msgb)
 179 {
 180         fwp_msg_type_t msg_type;
 181         fwp_participant_id_t    participant_id;
 182
 183         fwp_msg_header_out(msgb->data, &msg_type, &participant_id);
 184         fwp_msgb_pull(msgb, sizeof(struct fwp_msg_header));
 185
 186         switch (msg_type) {
 187                 case  FWP_MSG_HELLO:
 188                         FWP_DEBUG("Message HELLO received from nodeid = %d "
 189                                   "appid = %d\n", participant_id.node_id,
 190                                         participant_id.app_id);
 191                         fwp_mngr_hello(msgb, participant_id);
 192                         break;
 193
 194                 case  FWP_MSG_RESERVE:
 195                         FWP_DEBUG("Message RESERVE received from nodeid = %d "
 196                                   "appid = %d\n", participant_id.node_id,
 197                                         participant_id.app_id);
 198                         fwp_mngr_contract_reserve(msgb, participant_id);
 199                         break;
 200
 201                 case  FWP_MSG_COMMIT:
 202                         FWP_DEBUG("Message COMMIT received from nodeid = %d "
 203                                   "appid = %d\n", participant_id.node_id,
 204                                         participant_id.app_id);
 205                         fwp_mngr_contract_commit(msgb, participant_id);
 206                         break;
 207                 default:
 208                         printf("Invalid message\n.");
 209                         fwp_msgb_free(msgb);
 210         }
 211 }
 212
 213 void fwp_mngr_main_loop()
 214 {
 215         struct fwp_msgb *msgb;
 216
 217         /* start admission control thread */
 218         while (1 /*exit_flag*/){
 219                 fwp_mngr_input(&msgb);
 220                 if (msgb)
 221                         fwp_mngr_msg_handler(msgb);
 222                 FWP_DEBUG("Mngr waiting for next msg.\n");
 223         }
 224 }
 225
 226 #if 0
 227 int fwp_mngr_init()
 228 {
 229         fwp_participant_info_t  my_info;
 230         int rv;
 231
 232         if ((rv = fwp_endpoint_table_init(fwp_configuration.max_endpoints)) ||
 233             (rv = fwp_vres_table_init(fwp_configuration.max_vres))) {
 234
 235                 return rv;
 236         }
 237
 238         /* Create fwp_participant_this */
 239         my_info.id.node_id = inet_addr("127.0.0.1");
 240         my_info.id.app_id = getpid();
 241         my_info.stream_id = FWP_MNGR_STREAM_ID;
 242
 243         fwp_participant_this = fwp_participant_create(&my_info);
 244         fwp_participant_mngr = fwp_participant_this;
 245         fwp_receive_endpoint_create(my_info.stream_id, 0,
 246                                         &fwp_participant_this->epointd);
 247         FWP_DEBUG("Participant_this created node_id id= %d stream id= %d\n",
 248                                fwp_participant_this->id.node_id,
 249                                fwp_participant_this->stream_id);
 250         return 0;
 251
 252 }
 253 #endif
 254
 255 int main()
 256 {
 257         if (fwp_init()) {
 258                 fprintf(stderr,"FWP manager initialization failed.\n");
 259                 exit(1);
 260         }
 261
 262         fwp_mngr_main_loop();
 263
 264         return 0;
 265 }