/**
* @brief linkstatd -- monitor interface status
*
* @param link_up [in] callback when link up
* @param link_down [in] callback when link down
*
* @return 0, if succ; -1, if failed
*/
int linkstatd(void (*link_up)(const char *ifname), void (*link_down)(const char *ifname))
{
int fd = -1;
char ifname[64] = {0};
char msg[1024] = {0};
struct sockaddr_nl sa = {0};
struct ifinfomsg *ifi = NLMSG_DATA(msg);
sa.nl_family = AF_NETLINK;
sa.nl_groups = RTMGRP_LINK;
if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE)) < 0)
perror("linkstatd socket create");
socket_bind(fd, (struct sockaddr *)&sa);
while (read(fd, msg, sizeof(msg)))
{
if_indextoname(ifi->ifi_index, ifname);
if (ifi->ifi_flags & IFF_RUNNING)
{
if (link_up != NULL) link_up(ifname);
}
else
{
if (link_up != NULL) link_down(ifname);
}
}
return 0;
}
// process any channel timeouts based on the current/given time
link_t link_process(link_t link, uint32_t now)
{
if(!link || !now) return LOG("bad args");
link->chans = link_process_chan(link->chans, now);
if(link->csid) return link;
// flagged to remove, do that now
link_down(link);
link_free(link);
return NULL;
}
void handle_input(char *input, char *itc_file , int node_id)
{
int quit_len;
char *inp_ptr;
pthread_t thread;
int srv_len = strlen("start_service");
int exit_len = strlen("exit");
int stop_srv_len = strlen("stop_service");
int connect_len = strlen("connect");
int download_len = strlen("download");
int dump_len = strlen("route_table");
int set_gar_len = strlen("set_garbler");
int link_up_len = strlen("link_up");
int link_down_len = strlen("link_down");
char file_name[NAME_MAX];
int max_connections;
char *app_buffer= (char *)malloc(APP_HEADER_SIZE);
int code;
int dest_node;
int window_size;
quit_len = strlen("quit");
inp_ptr = input;
srand(time(NULL));
if ( strncmp(input,"quit",quit_len) == 0 )
{
printf("\n Quiting ... \n");
exit(EXIT_SUCCESS);
}
if ( strncmp(input,"exit",exit_len) == 0 )
{
printf("\n Quiting ... \n");
exit(EXIT_SUCCESS);
}
if ( strncmp(input,"start_service",srv_len) == 0 )
{
printf("\n Starting Server Thread : SID = %d \n" , rand()% 10000 );
inp_ptr += srv_len ;
sscanf(inp_ptr,"%d", &max_connections);
printf("\n Max connections = %d \n" , max_connections );
init_state(&__max_connections);
set_state(&__max_connections,max_connections);
handle_start_server(itc_file , node_id , inp_ptr , &thread);
}
if ( strncmp(input,"stop_service",stop_srv_len) == 0 )
{
printf("\n stoping the serivce ... \n");
pthread_cancel(thread);
}
if ( strncmp(input,"connect",connect_len) == 0)
{
inp_ptr += connect_len;
sscanf(inp_ptr,"%d",&dest_node);
sscanf(inp_ptr,"%d",&window_size);
nfd_send_buffer_transport("Donkey!" ,8,2);
}
if ( strncmp(input,"route_table",dump_len) == 0)
{
dump_route_table();
printf("\n Route table dumped to file \n");
}
if ( strncmp(input,"link_up",link_up_len) == 0)
{
inp_ptr+=link_up_len;
sscanf(inp_ptr,"%d",&dest_node);
link_up(dest_node);
printf("\n Link upped :) \n");
}
if ( strncmp(input,"link_down",link_down_len) == 0)
{
inp_ptr += link_down_len;
sscanf(inp_ptr,"%d",&dest_node);
link_down(dest_node);
printf("\n Link downed!\n");
}
if ( strncmp(input,"download",download_len) == 0 )
{
inp_ptr += download_len;
sscanf(inp_ptr , "%d%s" , &dest_node , file_name);
code = CODE_GET ;
pack_into_packet(app_buffer, CODE_OFFSET , &code , CODE_SIZE);
pack_into_packet(app_buffer ,FILENAME_OFFSET , file_name , strlen(file_name) +1 );
printf("\n Currnet node = %d " , __current_node );
pack_into_packet(app_buffer , SRC_ID_OFFSET , &__current_node , SRC_ID_SIZE);
nfd_send_buffer_transport(app_buffer,APP_HEADER_SIZE,dest_node);
}
if ( strncmp(input,"set_garbler",set_gar_len) == 0)
{
inp_ptr += connect_len;
sscanf(inp_ptr,"%d%d",&__loss_frac , &__corr_fact);
fprintf(stderr ,"\n garbler charecteristics set ... \n");
}
}
