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Add some more safety checks to the item system.

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While I cannot guarantee the class of glitches that allows for additional items to be thrown/dropped has been completely obliterated, this DOES prevent the class of exploits that allows for "infinite items" (really just negative quantities not completely bounds-checked for).
This commit is contained in:
toaster 2018-08-15 14:40:06 +01:00
parent 8c5d4dd270
commit 7f066fbf60
1 changed files with 44 additions and 14 deletions
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50
src/k_kart.c
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@ -2840,6 +2840,13 @@ static void K_MoveHeldObjects(player_t *player)
if (!player->mo->hnext)
{
player->kartstuff[k_bananadrag] = 0;
if (player->kartstuff[k_eggmanheld])
player->kartstuff[k_eggmanheld] = 0;
else if (player->kartstuff[k_itemheld])
{
player->kartstuff[k_itemamount] = player->kartstuff[k_itemheld] = 0;
player->kartstuff[k_itemtype] = KITEM_NONE;
}
return;
}
@ -2848,6 +2855,13 @@ static void K_MoveHeldObjects(player_t *player)
// we need this here too because this is done in afterthink - pointers are cleaned up at the START of each tic...
P_SetTarget(&player->mo->hnext, NULL);
player->kartstuff[k_bananadrag] = 0;
if (player->kartstuff[k_eggmanheld])
player->kartstuff[k_eggmanheld] = 0;
else if (player->kartstuff[k_itemheld])
{
player->kartstuff[k_itemamount] = player->kartstuff[k_itemheld] = 0;
player->kartstuff[k_itemtype] = KITEM_NONE;
}
return;
}
@ -3718,6 +3732,10 @@ void K_MoveKartPlayer(player_t *player, boolean onground)
if (player->kartstuff[k_rocketsneakertimer] < 1)
player->kartstuff[k_rocketsneakertimer] = 1;
}
else if (player->kartstuff[k_itemamount] <= 0)
{
player->kartstuff[k_itemamount] = player->kartstuff[k_itemheld] = 0;
}
else
{
switch (player->kartstuff[k_itemtype])
@ -3770,6 +3788,11 @@ void K_MoveKartPlayer(player_t *player, boolean onground)
for (moloop = 0; moloop < player->kartstuff[k_itemamount]; moloop++)
{
mo = P_SpawnMobj(player->mo->x, player->mo->y, player->mo->z, MT_BANANA_SHIELD);
if (!mo)
{
player->kartstuff[k_itemamount] = moloop;
break;
}
mo->flags |= MF_NOCLIPTHING;
mo->threshold = 10;
mo->movecount = player->kartstuff[k_itemamount];
@ -3784,8 +3807,7 @@ void K_MoveKartPlayer(player_t *player, boolean onground)
{
K_ThrowKartItem(player, false, MT_BANANA, -1, false);
K_PlayTauntSound(player->mo);
player->kartstuff[k_itemamount]--;
if (!player->kartstuff[k_itemamount])
if (!(--player->kartstuff[k_itemamount]))
player->kartstuff[k_itemheld] = 0;
}
break;
@ -3797,12 +3819,12 @@ void K_MoveKartPlayer(player_t *player, boolean onground)
player->kartstuff[k_eggmanheld] = 1;
S_StartSound(player->mo, sfx_s254);
mo = P_SpawnMobj(player->mo->x, player->mo->y, player->mo->z, MT_FAKESHIELD);
if (mo)
{
mo->flags |= MF_NOCLIPTHING;
mo->threshold = 10;
mo->movecount = 1;
mo->lastlook = 1;
if (mo)
{
P_SetTarget(&mo->target, player->mo);
P_SetTarget(&player->mo->hnext, mo);
}
@ -3828,6 +3850,11 @@ void K_MoveKartPlayer(player_t *player, boolean onground)
newx = player->mo->x + P_ReturnThrustX(player->mo, newangle, 64*FRACUNIT);
newy = player->mo->y + P_ReturnThrustY(player->mo, newangle, 64*FRACUNIT);
mo = P_SpawnMobj(newx, newy, player->mo->z, MT_ORBINAUT_SHIELD);
if (!mo)
{
player->kartstuff[k_itemamount] = moloop;
break;
}
mo->flags |= MF_NOCLIPTHING;
mo->angle = newangle;
mo->threshold = 10;
@ -3845,8 +3872,7 @@ void K_MoveKartPlayer(player_t *player, boolean onground)
K_ThrowKartItem(player, true, MT_ORBINAUT, 1, false);
K_PlayTauntSound(player->mo);
player->kartstuff[k_itemamount]--;
if (!player->kartstuff[k_itemamount])
if (!(--player->kartstuff[k_itemamount]))
player->kartstuff[k_itemheld] = 0;
}
break;
@ -3870,6 +3896,11 @@ void K_MoveKartPlayer(player_t *player, boolean onground)
newx = player->mo->x + P_ReturnThrustX(player->mo, newangle, 64*FRACUNIT);
newy = player->mo->y + P_ReturnThrustY(player->mo, newangle, 64*FRACUNIT);
mo = P_SpawnMobj(newx, newy, player->mo->z, MT_JAWZ_SHIELD);
if (!mo)
{
player->kartstuff[k_itemamount] = moloop;
break;
}
mo->flags |= MF_NOCLIPTHING;
mo->angle = newangle;
mo->threshold = 10;
@ -3889,8 +3920,7 @@ void K_MoveKartPlayer(player_t *player, boolean onground)
K_ThrowKartItem(player, true, MT_JAWZ_DUD, -1, false);
K_PlayTauntSound(player->mo);
player->kartstuff[k_itemamount]--;
if (!player->kartstuff[k_itemamount])
if (!(--player->kartstuff[k_itemamount]))
player->kartstuff[k_itemheld] = 0;
}
break;
@ -3901,12 +3931,12 @@ void K_MoveKartPlayer(player_t *player, boolean onground)
player->kartstuff[k_itemheld] = 1;
S_StartSound(player->mo, sfx_s254);
mo = P_SpawnMobj(player->mo->x, player->mo->y, player->mo->z, MT_SSMINE_SHIELD);
if (mo)
{
mo->flags |= MF_NOCLIPTHING;
mo->threshold = 10;
mo->movecount = 1;
mo->lastlook = 1;
if (mo)
{
P_SetTarget(&mo->target, player->mo);
P_SetTarget(&player->mo->hnext, mo);
}