akick command

static void do_akick(User *u)
{
    char *chan   = strtok(NULL, " ");
    char *cmd    = strtok(NULL, " ");
    char *mask   = strtok(NULL, " ");
    char *reason = strtok_remaining();
    ChannelInfo *ci = NULL;
    int i;
    int is_list = (cmd && (stricmp(cmd,"LIST") == 0
                           || stricmp(cmd,"VIEW") == 0
                           || stricmp(cmd,"COUNT") == 0));

    if (!chan
     || !cmd
     || (!mask && (stricmp(cmd, "ADD") == 0 || stricmp(cmd, "DEL") == 0))
    ) {
        syntax_error(s_ChanServ, u, "AKICK", CHAN_AKICK_SYNTAX);
    } else if (!(ci = get_channelinfo(chan))) {
        notice_lang(s_ChanServ, u, CHAN_X_NOT_REGISTERED, chan);
    } else if (ci->flags & CF_VERBOTEN) {
        notice_lang(s_ChanServ, u, CHAN_X_FORBIDDEN, chan);
    } else if (!check_access_cmd(u, ci, "AKICK", is_list ? "LIST" : cmd)
               && !is_services_admin(u)) {
        if (ci->founder && valid_ngi(u) && ci->founder == u->ngi->id)
            notice_lang(s_ChanServ, u, CHAN_IDENTIFY_REQUIRED, s_ChanServ,
                        chan);
        else
            notice_lang(s_ChanServ, u, ACCESS_DENIED);

    } else if (stricmp(cmd, "ADD") == 0) {

        char *mask2, *user, *host;
        const char *nick;

        if (readonly) {
            notice_lang(s_ChanServ, u, CHAN_AKICK_DISABLED);
            put_channelinfo(ci);
            return;
        }

        /* Make sure we have a valid nick!user@host mask (fill in missing
         * parts with "*").  Error out on @ in nick (also catches a@b!c),
         * missing host, or empty nick/user/host. */
        mask2 = sstrdup(mask);
        nick = mask2;
        user = strchr(mask2, '!');
        if (user) {
            *user++ = 0;
        } else {
            nick = "*";
            user = mask2;
        }
        host = strchr(user, '@');
        if (host)
            *host++ = 0;
        if (!*nick || !*user || !host || !*host || strchr(nick, '@')) {
            notice_lang(s_ChanServ, u, BAD_NICKUSERHOST_MASK);
            free(mask2);
            put_channelinfo(ci);
            return;
        }
        mask = smalloc(strlen(nick)+strlen(user)+strlen(host)+3);
        sprintf(mask, "%s!%s@%s", nick, user, host);
        free(mask2);

        ARRAY_SEARCH(ci->akick, mask, mask, stricmp, i);
        if (i < ci->akick_count) {
            notice_lang(s_ChanServ, u, CHAN_AKICK_ALREADY_EXISTS,
                        ci->akick[i].mask, chan);
            free(mask);
        } else if (ci->akick_count >= CSAutokickMax) {
            notice_lang(s_ChanServ, u, CHAN_AKICK_REACHED_LIMIT,
                        CSAutokickMax);
            free(mask);
        } else {
            ARRAY_EXTEND(ci->akick);
            ci->akick[i].channel = ci;  /* i points at new entry, from above */
            ci->akick[i].mask = mask;
            ci->akick[i].reason = reason ? sstrdup(reason) : NULL;
            time(&ci->akick[i].set);
            ci->akick[i].lastused = 0;
            memset(ci->akick[i].who, 0, NICKMAX);  // Avoid leaking random data
            strbcpy(ci->akick[i].who, u->nick);
            notice_lang(s_ChanServ, u, CHAN_AKICK_ADDED, mask, chan);
          if (ci->flags & CF_OPNOTICE) {
            char *chan_tmp = smalloc(sizeof(char) * (strlen(chan)+2));
            chan_tmp[0] = '@';
            strcpy(&chan_tmp[1], chan);
            notice(s_ChanServ, chan_tmp, "AKICK command used for %s in %s by %s",
                  mask, chan, u->nick);
            free(chan_tmp);
          }
        }

    } else if (stricmp(cmd, "DEL") == 0) {

        if (readonly) {
            notice_lang(s_ChanServ, u, CHAN_AKICK_DISABLED);
            put_channelinfo(ci);
            return;
        }