int main(int argc, char **argv)
{
int is_leader;
if (argc < 3) {
fprintf(stderr,"Not enough arguments\n");
exit(0);
}
my_jobid = atoi(argv[1]);
my_stepid = atoi(argv[2]);
snprintf(linkname, FILENAME_MAX, "%s.%d", FILENAME_PREFIX, my_jobid);
snprintf(usockname, FILENAME_MAX, "%s.%d", linkname, my_stepid);
snprintf(lockname, FILENAME_MAX, "%s.lock",usockname);
if (0 > (lockfd = pmix_create_locked(lockname))) {
fprintf(stderr,"Can't create lock file %s\n", lockname);
exit(0);
}
sfd = prepare_srv_socket(usockname);
int i = 0;
while(1) {
int fd = run_discovery(my_jobid, my_stepid, &is_leader);
if (is_leader) {
fprintf("Iteration %d. I am the leader\n", i);
service_requests(fd);
} else {
monitor_leader(fd);
printf("server closed connection. Repeat resolution\n");
}
i++;
}
}
/**
* Run discovery for on address (eg broadcast 255.255.255.255)
*/
static int cw_run_discovery(struct conn *conn, const char *acaddr)
{
/* get addr of destination */
struct addrinfo hints;
struct addrinfo *res, *res0;
memset(&hints, 0, sizeof(hints));
hints.ai_socktype = SOCK_DGRAM;
hints.ai_family = PF_UNSPEC;
int rc = getaddrinfo(acaddr, conf_control_port, &hints, &res0);
if (rc) {
cw_log(LOG_ERR, "Can't connect to AC %s: %s", acaddr, gai_strerror(rc));
return 0;
}
for (res = res0; res; res = res->ai_next) {
int sockfd;
int opt;
sockfd = socket(res->ai_family, SOCK_DGRAM, 0);
if (sockfd == -1) {
cw_log(LOG_ERR, "Can't create socket for %s: %s", acaddr,
strerror(errno));
continue;
}
opt = 1;
if (setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, &opt, sizeof(opt)) < 0) {
cw_log(LOG_ERR, "Can't set broadcast sockopt");
}
sock_set_recvtimeout(sockfd, 1);
sock_set_dontfrag(sockfd, 0);
sock_copyaddr(&conn->addr, res->ai_addr);
if (conf_ip){
struct sockaddr bind_address;
sock_strtoaddr(conf_ip,&bind_address);
int brc = bind(sockfd,&bind_address,sock_addrlen(&bind_address));
if (brc<0) {
cw_log(LOG_ERR,"Can't bind to %s",sock_addr2str(&bind_address));
return 0;
}
}
conn->sock = sockfd;
conn->readfrom = conn_recvfrom_packet;
run_discovery(conn);
conn->readfrom=NULL;
close(sockfd);
}
freeaddrinfo(res0);
return 0;
}
int
main(int argc, char **argv)
{
isns_server_t *server;
isns_source_t *source;
isns_db_t *db;
int c;
#ifdef MTRACE
mtrace();
#endif
while ((c = getopt_long(argc, argv, "46c:d:Efhr:", options, NULL)) != -1) {
switch (c) {
case '4':
opt_af = AF_INET;
break;
case '6':
opt_af = AF_INET6;
break;
case 'c':
opt_configfile = optarg;
break;
case 'd':
isns_enable_debugging(optarg);
break;
case 'E':
opt_esi = 0;
break;
case 'f':
opt_foreground = 1;
break;
case 'h':
usage(0, NULL);
case 'r':
if (!strcasecmp(optarg, "initiator"))
opt_role = ROLE_INITIATOR;
else
if (!strcasecmp(optarg, "control")
|| !strcasecmp(optarg, "monitor"))
opt_role = ROLE_MONITOR;
else {
isns_error("Unknown role \"%s\"\n", optarg);
usage(1, NULL);
}
break;
case 'V':
printf("Open-iSNS version %s\n"
"Copyright (C) 2007, Olaf Kirch <*****@*****.**>\n",
OPENISNS_VERSION_STRING);
return 0;
default:
usage(1, "Unknown option");
}
}
if (optind != argc)
usage(1, NULL);
/* If the config code derives the source name
* automatically, we want it to be distinct from
* any other source name (chosen by eg the iSCSI
* initiator). Adding a suffix of ":isns" is a
* somewhat lame attempt.
*/
isns_config.ic_source_suffix = "isns";
isns_read_config(opt_configfile);
if (!isns_config.ic_source_name)
usage(1, "Please specify an iSNS source name");
source = isns_source_create_iscsi(isns_config.ic_source_name);
isns_write_pidfile(isns_config.ic_pidfile);
if (!opt_foreground) {
if (daemon(0, 0) < 0)
isns_fatal("Unable to background server process\n");
isns_log_background();
isns_update_pidfile(isns_config.ic_pidfile);
}
install_sighandler(SIGTERM, sig_cleanup);
install_sighandler(SIGINT, sig_cleanup);
install_sighandler(SIGUSR2, sig_reread);
/* Create a DB object that shadows our portal list. This is for ESI -
* when an ESI comes in, the library will look up the portal in this
* database, and update its mtime. By checking the mtime at regular
* intervals, we can verify whether the server's ESIs actually
* reach us.
*/
db = isns_db_open_shadow(&local_portals);
server = isns_create_server(source, db, &isns_callback_service_ops);
isns_server_set_scn_callback(server, scn_callback);
run_discovery(server);
return 0;
}
