/* §5.2 */
static int answer_REQ_VOTE(
struct ticket_config *tk,
struct booth_site *sender,
struct booth_site *leader,
struct boothc_ticket_msg *msg
)
{
int valid;
struct boothc_ticket_msg omsg;
cmd_result_t inappr_reason;
int reason;
inappr_reason = test_reason(tk, sender, leader, msg);
if (inappr_reason)
return send_reject(sender, tk, inappr_reason, msg);
valid = term_time_left(tk);
reason = ntohl(msg->header.reason);
/* valid tickets are not allowed only if the sender thinks
* the ticket got lost */
if (sender != tk->leader && valid && reason != OR_STEPDOWN) {
tk_log_warn("election from %s with reason %s rejected "
"(we have %s as ticket owner), ticket still valid for %ds",
site_string(sender), state_to_string(reason),
site_string(tk->leader), valid);
return send_reject(sender, tk, RLT_TERM_STILL_VALID, msg);
}
if (term_too_low(tk, sender, leader, msg))
return 0;
/* set this, so that we know not to send status for the
* ticket */
tk->in_election = 1;
/* reset ticket's leader on not valid tickets */
if (!valid)
set_leader(tk, NULL);
/* if it's a newer term or ... */
if (newer_term(tk, sender, leader, msg, 1)) {
clear_election(tk);
goto vote_for_sender;
}
/* ... we didn't vote yet, then vote for the sender */
/* §5.2, §5.4 */
if (!tk->voted_for) {
vote_for_sender:
tk->voted_for = sender;
record_vote(tk, sender, leader);
}
init_ticket_msg(&omsg, OP_VOTE_FOR, OP_REQ_VOTE, RLT_SUCCESS, 0, tk);
omsg.ticket.leader = htonl(get_node_id(tk->voted_for));
return booth_udp_send_auth(sender, &omsg, sendmsglen(&omsg));
}
static int do_command(cmd_request_t cmd)
{
struct booth_site *site;
struct boothc_ticket_msg reply;
struct booth_transport const *tpt;
uint32_t leader_id;
int rv;
int reply_cnt = 0, msg_logged = 0;
const char *op_str = "";
if (cmd == CMD_GRANT)
op_str = "grant";
else if (cmd == CMD_REVOKE)
op_str = "revoke";
rv = 0;
site = NULL;
/* Always use TCP for client - at least for now. */
tpt = booth_transport + TCP;
if (!*cl.site)
site = local;
else {
if (!find_site_by_name(cl.site, &site, 1)) {
log_error("Site \"%s\" not configured.", cl.site);
goto out_close;
}
}
if (site->type == ARBITRATOR) {
if (site == local) {
log_error("We're just an arbitrator, cannot grant/revoke tickets here.");
} else {
log_error("%s is just an arbitrator, cannot grant/revoke tickets there.", cl.site);
}
goto out_close;
}
assert(site->type == SITE);
/* We don't check for existence of ticket, so that asking can be
* done without local configuration, too.
* Although, that means that the UDP port has to be specified, too. */
if (!cl.msg.ticket.id[0]) {
/* If the loaded configuration has only a single ticket defined, use that. */
if (booth_conf->ticket_count == 1) {
strncpy(cl.msg.ticket.id, booth_conf->ticket[0].name,
sizeof(cl.msg.ticket.id));
} else {
log_error("No ticket given.");
goto out_close;
}
}
redirect:
init_header(&cl.msg.header, cmd, 0, cl.options, 0, 0, sizeof(cl.msg));
rv = tpt->open(site);
if (rv < 0)
goto out_close;
rv = tpt->send(site, &cl.msg, sendmsglen(&cl.msg));
if (rv < 0)
goto out_close;
read_more:
rv = tpt->recv_auth(site, &reply, sizeof(reply));
if (rv < 0) {
/* print any errors depending on the code sent by the
* server */
(void)test_reply(ntohl(reply.header.result), cmd);
goto out_close;
}
rv = test_reply(ntohl(reply.header.result), cmd);
if (rv == 1) {
tpt->close(site);
leader_id = ntohl(reply.ticket.leader);
if (!find_site_by_id(leader_id, &site)) {
log_error("Message with unknown redirect site %x received", leader_id);
rv = -1;
goto out_close;
}
goto redirect;
} else if (rv == 2 || rv == 3) {
/* the server has more to say */
/* don't wait too long */
if (reply_cnt > 1 && !(cl.options & OPT_WAIT)) {
rv = 0;
log_info("Giving up on waiting for the definite result. "
"Please use \"booth list\" later to "
"see the outcome.");
goto out_close;
}
if (reply_cnt == 0) {
log_info("%s request sent, "
"waiting for the result ...", op_str);
msg_logged++;
} else if (rv == 3 && msg_logged < 2) {
log_info("waiting for the CIB commit ...");
msg_logged++;
}
reply_cnt++;
goto read_more;
}
out_close:
if (site)
tpt->close(site);
return rv;
}
