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backport fix for https://github.com/espressif/esp-idf/issues/631 (#2006) 

* backport fix for https://github.com/espressif/esp-idf/issues/631
* remove code from intermediate fix
This commit is contained in:
Arnim Läuger 2017-06-20 21:59:12 +02:00 committed by Marcel Stör
parent 827642b49a
commit 435a4cf5a1
2 changed files with 37 additions and 19 deletions
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6
app/include/lwip/app/dhcpserver.h
View File

@ -5,8 +5,6 @@
#define USE_DNS
#define DHCP_MSGOPTIONS_MIN_LEN 312
typedef struct dhcps_state{
sint16_t state;
} dhcps_state;
@ -23,9 +21,7 @@ typedef struct dhcps_msg {
uint8_t chaddr[16];
uint8_t sname[64];
uint8_t file[128];
// Recommendation from Espressif:
// To avoid crash in DHCP big packages modify option length from 312 to MTU - IPHEAD(20) - UDPHEAD(8) - DHCPHEAD(236).
uint8_t options[IP_FRAG_MAX_MTU - 20 - 8 - 236];
uint8_t options[312];
}dhcps_msg;
#ifndef LWIP_OPEN_SRC

50
app/lwip/app/dhcpserver.c
View File

@ -277,6 +277,21 @@ static void ICACHE_FLASH_ATTR create_msg(struct dhcps_msg *m)
uint32 magic_cookie1 = magic_cookie;
os_memcpy((char *) m->options, &magic_cookie1, sizeof(magic_cookie1));
}
struct pbuf * dhcps_pbuf_alloc(u16_t len)
{
u16_t mlen = sizeof(struct dhcps_msg);
if (len > mlen) {
#if DHCPS_DEBUG
DHCPS_LOG("dhcps: len=%d mlen=%d", len, mlen);
#endif
mlen = len;
}
return pbuf_alloc(PBUF_TRANSPORT, mlen, PBUF_RAM);
}
///////////////////////////////////////////////////////////////////////////////////
/*
* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>OFFER
@ -284,7 +299,7 @@ static void ICACHE_FLASH_ATTR create_msg(struct dhcps_msg *m)
* @param -- m ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>͵<EFBFBD>DHCP msg<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
*/
///////////////////////////////////////////////////////////////////////////////////
static void ICACHE_FLASH_ATTR send_offer(struct dhcps_msg *m)
static void ICACHE_FLASH_ATTR send_offer(struct dhcps_msg *m, u16_t len)
{
uint8_t *end;
struct pbuf *p, *q;
@ -298,8 +313,7 @@ static void ICACHE_FLASH_ATTR send_offer(struct dhcps_msg *m)
end = add_offer_options(end);
end = add_end(end);
// ensure that not more than the minimum options length is transmitted
p = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcps_msg) - sizeof(m->options) + DHCP_MSGOPTIONS_MIN_LEN, PBUF_RAM);
p = dhcps_pbuf_alloc(len);
#if DHCPS_DEBUG
os_printf("udhcp: send_offer>>p->ref = %d\n", p->ref);
#endif
@ -345,7 +359,7 @@ static void ICACHE_FLASH_ATTR send_offer(struct dhcps_msg *m)
* @param m ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>͵<EFBFBD>DHCP msg<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
*/
///////////////////////////////////////////////////////////////////////////////////
static void ICACHE_FLASH_ATTR send_nak(struct dhcps_msg *m)
static void ICACHE_FLASH_ATTR send_nak(struct dhcps_msg *m, u16_t len)
{
u8_t *end;
@ -359,8 +373,7 @@ static void ICACHE_FLASH_ATTR send_nak(struct dhcps_msg *m)
end = add_msg_type(&m->options[4], DHCPNAK);
end = add_end(end);
// ensure that not more than the minimum options length is transmitted
p = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcps_msg) - sizeof(m->options) + DHCP_MSGOPTIONS_MIN_LEN, PBUF_RAM);
p = dhcps_pbuf_alloc(len);
#if DHCPS_DEBUG
os_printf("udhcp: send_nak>>p->ref = %d\n", p->ref);
#endif
@ -406,7 +419,7 @@ static void ICACHE_FLASH_ATTR send_nak(struct dhcps_msg *m)
* @param m ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>͵<EFBFBD>DHCP msg<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
*/
///////////////////////////////////////////////////////////////////////////////////
static void ICACHE_FLASH_ATTR send_ack(struct dhcps_msg *m)
static void ICACHE_FLASH_ATTR send_ack(struct dhcps_msg *m, u16_t len)
{
u8_t *end;
@ -421,8 +434,7 @@ static void ICACHE_FLASH_ATTR send_ack(struct dhcps_msg *m)
end = add_offer_options(end);
end = add_end(end);
// ensure that not more than the minimum options length is transmitted
p = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcps_msg) - sizeof(m->options) + DHCP_MSGOPTIONS_MIN_LEN, PBUF_RAM);
p = dhcps_pbuf_alloc(len);
#if DHCPS_DEBUG
os_printf("udhcp: send_ack>>p->ref = %d\n", p->ref);
#endif
@ -605,7 +617,7 @@ static void ICACHE_FLASH_ATTR handle_dhcp(void *arg,
uint16_t port)
{
struct dhcps_msg *pmsg_dhcps = NULL;
sint16_t tlen = 0;
sint16_t tlen = 0, malloc_len;
u16_t i = 0;
u16_t dhcps_msg_cnt = 0;
u8_t *p_dhcps_msg = NULL;
@ -616,11 +628,21 @@ static void ICACHE_FLASH_ATTR handle_dhcp(void *arg,
#endif
if (p==NULL) return;
pmsg_dhcps = (struct dhcps_msg *)os_zalloc(sizeof(struct dhcps_msg));
malloc_len = sizeof(struct dhcps_msg);
#if DHCPS_DEBUG
DHCPS_LOG("dhcps: handle_dhcp malloc_len=%d rx_len=%d", malloc_len, p->tot_len);
#endif
if (malloc_len < p->tot_len) {
malloc_len = p->tot_len;
}
pmsg_dhcps = (struct dhcps_msg *)os_malloc(malloc_len);
if (NULL == pmsg_dhcps){
pbuf_free(p);
return;
}
memset(pmsg_dhcps , 0x00 , malloc_len);
p_dhcps_msg = (u8_t *)pmsg_dhcps;
tlen = p->tot_len;
data = p->payload;
@ -660,19 +682,19 @@ static void ICACHE_FLASH_ATTR handle_dhcp(void *arg,
#if DHCPS_DEBUG
os_printf("dhcps: handle_dhcp-> DHCPD_STATE_OFFER\n");
#endif
send_offer(pmsg_dhcps);
send_offer(pmsg_dhcps, malloc_len);
break;
case DHCPS_STATE_ACK://3
#if DHCPS_DEBUG
os_printf("dhcps: handle_dhcp-> DHCPD_STATE_ACK\n");
#endif
send_ack(pmsg_dhcps);
send_ack(pmsg_dhcps, malloc_len);
break;
case DHCPS_STATE_NAK://4
#if DHCPS_DEBUG
os_printf("dhcps: handle_dhcp-> DHCPD_STATE_NAK\n");
#endif
send_nak(pmsg_dhcps);
send_nak(pmsg_dhcps, malloc_len);
break;
default :
break;