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