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apps/sntp: Use ip_addr_copy to save server address

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Use ip_addr_copy instead of ip_addr_set to avoid NULL test for
&sntp_last_server_address. This fixes build warning when
SNTP_CHECK_RESPONSE>=1 && LWIP_IPV4=1 && LWIP_IPV6=1.

In file included from ../../../../lwip/src/include/lwip/apps/sntp.h:41:0,
                 from ../../../../lwip/src/apps/sntp/sntp.c:52:
../../../../lwip/src/apps/sntp/sntp.c: In function ‘sntp_send_request’:
../../../../lwip/src/include/lwip/ip_addr.h:105:58: error: the comparison will always evaluate as ‘true’ for the address of ‘sntp_last_server_address’ will never be NULL [-Werror=address]
 #define IP_SET_TYPE(ipaddr, iptype)     do { if((ipaddr) != NULL) { IP_SET_TYPE_VAL(*(ipaddr), iptype); }}while(0)
                                                          ^
../../../../lwip/src/include/lwip/ip_addr.h:157:36: note: in expansion of macro ‘IP_SET_TYPE’
 #define ip_addr_set(dest, src) do{ IP_SET_TYPE(dest, IP_GET_TYPE(src)); if(IP_IS_V6(src)){ \
                                    ^~~~~~~~~~~
../../../../lwip/src/apps/sntp/sntp.c:549:5: note: in expansion of macro ‘ip_addr_set’
     ip_addr_set(&sntp_last_server_address, server_addr);
     ^~~~~~~~~~~

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: goldsimon <goldsimon@gmx.de>
This commit is contained in:
Axel Lin 2017-12-15 14:47:52 +08:00 committed by goldsimon
parent 920ee2d07e
commit ba270c2414
1 changed files with 1 additions and 1 deletions
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2
src/apps/sntp/sntp.c
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@ -546,7 +546,7 @@ sntp_send_request(const ip_addr_t *server_addr)
sys_timeout((u32_t)SNTP_RECV_TIMEOUT, sntp_try_next_server, NULL);
#if SNTP_CHECK_RESPONSE >= 1
/* save server address to verify it in sntp_recv */
ip_addr_set(&sntp_last_server_address, server_addr);
ip_addr_copy(sntp_last_server_address, *server_addr);
#endif /* SNTP_CHECK_RESPONSE >= 1 */
} else {
LWIP_DEBUGF(SNTP_DEBUG_SERIOUS, ("sntp_send_request: Out of memory, trying again in %"U32_F" ms\n",