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Rework buffer access in roll-tm.c

This commit is contained in:
Simon Duquennoy 2018-10-17 17:30:12 +02:00
parent 0531c555e8
commit 3384de64b7
1 changed files with 6 additions and 7 deletions
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13
os/net/ipv6/multicast/roll-tm.c
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@ -456,9 +456,8 @@ static uint16_t last_seq;
/*---------------------------------------------------------------------------*/
/* uIPv6 Pointers */
/*---------------------------------------------------------------------------*/
#define UIP_EXT_BUF ((struct uip_ext_hdr *)&uip_buf[UIP_LLH_LEN + UIP_IPH_LEN])
#define UIP_EXT_BUF_NEXT ((uint8_t *)&uip_buf[UIP_LLH_LEN + UIP_IPH_LEN + HBHO_TOTAL_LEN])
#define UIP_EXT_OPT_FIRST ((struct hbho_mcast *)&uip_buf[UIP_LLH_LEN + UIP_IPH_LEN + 2])
#define UIP_EXT_BUF_NEXT ((uint8_t *)(UIP_IP_PAYLOAD(HBHO_TOTAL_LEN)))
#define UIP_EXT_OPT_FIRST ((struct hbho_mcast *)(UIP_IP_PAYLOAD(0) + 2))
extern uint16_t uip_slen;
/*---------------------------------------------------------------------------*/
/* Local function prototypes */
@ -1322,11 +1321,11 @@ out()
}
/* Slide 'right' by HBHO_TOTAL_LEN bytes */
memmove(UIP_EXT_BUF_NEXT, UIP_EXT_BUF, uip_len - UIP_IPH_LEN);
memset(UIP_EXT_BUF, 0, HBHO_TOTAL_LEN);
memmove(UIP_EXT_BUF_NEXT, UIP_EXT_BUF(0), uip_len - UIP_IPH_LEN);
memset(UIP_EXT_BUF(0), 0, HBHO_TOTAL_LEN);
UIP_EXT_BUF->next = UIP_IP_BUF->proto;
UIP_EXT_BUF->len = 0;
UIP_EXT_BUF(0)->next = UIP_IP_BUF->proto;
UIP_EXT_BUF(0)->len = 0;
lochbhmptr = UIP_EXT_OPT_FIRST;
lochbhmptr->type = HBHO_OPT_TYPE_TRICKLE;