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Merge branch 'feature/lwip_allocate_a_new_random_local_tcp_port' into 'master'

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feat:Make lallocate a new local TCP port is random

See merge request sdk/ESP8266_RTOS_SDK!616
This commit is contained in:
Wu Jian Gang
2018-12-21 08:36:18 +08:00
parent fc6c39e51c a66d130b1a
commit b05de84bbf
1 changed files with 8 additions and 0 deletions
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8
components/lwip/lwip/src/core/tcp.c
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@ -62,6 +62,10 @@
#include <string.h>
#if ESP_LWIP
#include "arch/sys_arch.h"
#endif
#ifdef LWIP_HOOK_FILENAME
#include LWIP_HOOK_FILENAME
#endif
@ -847,9 +851,13 @@ tcp_new_port(void)
struct tcp_pcb *pcb;
again:
#if ESP_LWIP
tcp_port = (u16_t)(esp_random() % (TCP_LOCAL_PORT_RANGE_END - TCP_LOCAL_PORT_RANGE_START)) + TCP_LOCAL_PORT_RANGE_START;
#else
if (tcp_port++ == TCP_LOCAL_PORT_RANGE_END) {
tcp_port = TCP_LOCAL_PORT_RANGE_START;
}
#endif
/* Check all PCB lists. */
for (i = 0; i < NUM_TCP_PCB_LISTS; i++) {
for (pcb = *tcp_pcb_lists[i]; pcb != NULL; pcb = pcb->next) {