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m_list: fail on invalid parameters

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Loose port of 6ea60b2297948211925e22bd1f284179d680b4ae. I've chosen to
reduce indentation where it's convenient, and I'm allowing >-[0-9] as a
way of specifying a minimum of 0 because... I don't know, it just seems
neater to me.
This commit is contained in:
Ed Kellett 2021-10-19 23:56:22 +01:00
parent e7f0aea682
commit b5bf350512
1 changed files with 37 additions and 25 deletions
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40
modules/m_list.c
View file

@ -221,22 +221,23 @@ mo_list(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_
if (*args == '<')
{
args++;
if (IsDigit(*args))
{
if (!IsDigit(*args)) goto fail;
params->users_max = atoi(args);
if (params->users_max == 0)
params->users_max = INT_MAX;
else
params->users_max--;
}
}
else if (*args == '>')
{
args++;
if (IsDigit(*args))
params->users_min = atoi(args) + 1;
else
else if (args[0] == '-' && IsDigit(args[1]))
params->users_min = 0;
else
goto fail;
}
else if (*args == 'C' || *args == 'c')
{
@ -245,19 +246,19 @@ mo_list(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_
{
/* Creation time earlier than last x minutes. */
args++;
if (IsDigit(*args))
{
if (!IsDigit(*args)) goto fail;
params->created_max = rb_current_time() - (60 * atoi(args));
}
}
else if (*args == '<')
{
/* Creation time within last x minutes. */
args++;
if (IsDigit(*args))
{
if (!IsDigit(*args)) goto fail;
params->created_min = rb_current_time() - (60 * atoi(args));
}
else
{
goto fail;
}
}
else if (*args == 'T' || *args == 't')
@ -267,19 +268,19 @@ mo_list(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_
{
/* Topic change time earlier than last x minutes. */
args++;
if (IsDigit(*args))
{
if (!IsDigit(*args)) goto fail;
params->topic_max = rb_current_time() - (60 * atoi(args));
}
}
else if (*args == '<')
{
/* Topic change time within last x minutes. */
args++;
if (IsDigit(*args))
{
if (!IsDigit(*args)) goto fail;
params->topic_min = rb_current_time() - (60 * atoi(args));
}
else
{
goto fail;
}
}
else if (*args == '!')
@ -293,6 +294,10 @@ mo_list(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_
rb_free(params->mask);
params->mask = rb_strdup(args);
}
else
{
goto fail;
}
if (EmptyString(p))
break;
@ -302,6 +307,13 @@ mo_list(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_
}
safelist_client_instantiate(source_p, params);
return;
fail:
rb_free(params);
sendto_one(source_p, form_str(RPL_LISTSTART), me.name, source_p->name);
sendto_one_notice(source_p, ":Invalid parameters for /LIST");
sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
}
/*