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Fix compiling ACD without LWIP_RAND

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Copy bad rand implementation from old one in autoip.c

Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
This commit is contained in:
Simon Goldschmidt 2018-10-12 21:05:19 +02:00
parent e16cc67b70
commit 0d4e1beec4
1 changed files with 24 additions and 7 deletions
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31
src/core/ipv4/acd.c
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@ -76,12 +76,28 @@
#define ACD_TICKS_PER_SECOND (1000 / ACD_TMR_INTERVAL)
/* Define good random function (LWIP_RAND) in lwipopts.h */
#define ACD_RANDOM_PROBE_WAIT (LWIP_RAND() % \
(PROBE_WAIT * ACD_TICKS_PER_SECOND))
#ifdef LWIP_RAND
#define LWIP_ACD_RAND(netif, acd) LWIP_RAND()
#else /* LWIP_RAND */
#ifdef LWIP_AUTOIP_RAND
#include "lwip/autoip.h"
#define LWIP_ACD_RAND(netif, acd) LWIP_AUTOIP_RAND(netif) /* for backwards compatibility */
#else
#define LWIP_ACD_RAND(netif, acd) ((((u32_t)((netif->hwaddr[5]) & 0xff) << 24) | \
((u32_t)((netif->hwaddr[3]) & 0xff) << 16) | \
((u32_t)((netif->hwaddr[2]) & 0xff) << 8) | \
((u32_t)((netif->hwaddr[4]) & 0xff))) + \
(acd->sent_num))
#endif /* LWIP_AUTOIP_RAND */
#endif /* LWIP_RAND */
#define ACD_RANDOM_PROBE_INTERVAL ((LWIP_RAND() % ((PROBE_MAX - PROBE_MIN) \
* ACD_TICKS_PER_SECOND)) + \
(PROBE_MIN * ACD_TICKS_PER_SECOND ))
#define ACD_RANDOM_PROBE_WAIT(netif, acd) (LWIP_ACD_RAND(netif, acd) % \
(PROBE_WAIT * ACD_TICKS_PER_SECOND))
#define ACD_RANDOM_PROBE_INTERVAL(netif, acd) ((LWIP_ACD_RAND(netif, acd) % \
((PROBE_MAX - PROBE_MIN) * ACD_TICKS_PER_SECOND)) + \
(PROBE_MIN * ACD_TICKS_PER_SECOND ))
/* Function definitions */
static void acd_restart(struct netif *netif, struct acd *acd);
@ -138,6 +154,7 @@ acd_start(struct netif *netif, struct acd *acd, ip4_addr_t ipaddr)
{
err_t result = ERR_OK;
LWIP_UNUSED_ARG(netif);
LWIP_DEBUGF(ACD_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("acd_start(netif=%p) %c%c%"U16_F"\n",
(void *)netif, netif->name[0],
@ -149,7 +166,7 @@ acd_start(struct netif *netif, struct acd *acd, ip4_addr_t ipaddr)
ip4_addr_copy(acd->ipaddr, ipaddr);
acd->state = ACD_STATE_PROBE_WAIT;
acd->ttw = (u16_t)(ACD_RANDOM_PROBE_WAIT);
acd->ttw = (u16_t)(ACD_RANDOM_PROBE_WAIT(netif, acd));
return result;
}
@ -229,7 +246,7 @@ acd_tmr(void)
acd->ttw = (u16_t)(ANNOUNCE_WAIT * ACD_TICKS_PER_SECOND);
} else {
/* calculate time to wait to next probe */
acd->ttw = (u16_t)(ACD_RANDOM_PROBE_INTERVAL);
acd->ttw = (u16_t)(ACD_RANDOM_PROBE_INTERVAL(netif, acd));
}
}
break;