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Implement unit test for bug #54670: 127.0.0.1 sent out to netif_default?

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This commit is contained in:
Dirk Ziegelmeier 2018-11-01 21:35:46 +01:00
parent 0c34597b9e
commit 48c2056d5b
1 changed files with 73 additions and 2 deletions
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75
test/unit/ip4/test_ip4.c
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@ -1,6 +1,7 @@
#include "test_ip4.h"
#include "lwip/ip4.h"
#include "lwip/etharp.h"
#include "lwip/inet_chksum.h"
#include "lwip/stats.h"
#include "lwip/prot/ip.h"
@ -12,6 +13,55 @@
#error "This tests needs LWIP_IPV4, IP_REASSEMBLY; MIB2- and IPFRAG-statistics enabled"
#endif
static struct netif test_netif;
static ip4_addr_t test_ipaddr, test_netmask, test_gw;
static int linkoutput_ctr;
/* reference internal lwip variable in netif.c */
static err_t
test_netif_linkoutput(struct netif *netif, struct pbuf *p)
{
fail_unless(netif == &test_netif);
fail_unless(p != NULL);
linkoutput_ctr++;
return ERR_OK;
}
static err_t
test_netif_init(struct netif *netif)
{
fail_unless(netif != NULL);
netif->linkoutput = test_netif_linkoutput;
netif->output = etharp_output;
netif->mtu = 1500;
netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
netif->hwaddr_len = ETHARP_HWADDR_LEN;
return ERR_OK;
}
static void
test_netif_add(void)
{
IP4_ADDR(&test_gw, 192,168,0,1);
IP4_ADDR(&test_ipaddr, 192,168,0,1);
IP4_ADDR(&test_netmask, 255,255,0,0);
fail_unless(netif_default == NULL);
netif_add(&test_netif, &test_ipaddr, &test_netmask, &test_gw,
NULL, test_netif_init, NULL);
netif_set_default(&test_netif);
netif_set_up(&test_netif);
}
static void
test_netif_remove(void)
{
if (netif_default == &test_netif) {
netif_remove(&test_netif);
}
}
/* Helper functions */
static void
create_ip4_input_fragment(u16_t ip_id, u16_t start, u16_t len, int last)
@ -71,11 +121,11 @@ ip4_teardown(void)
/* poll until all memory is released... */
tcpip_thread_poll_one();
lwip_check_ensure_no_alloc(SKIP_POOL(MEMP_SYS_TIMEOUT));
test_netif_remove();
netif_set_up(netif_get_loopif());
}
/* Test functions */
START_TEST(test_ip4_reass)
{
const u16_t ip_id = 128;
@ -148,6 +198,26 @@ START_TEST(test_ip4_reass)
}
END_TEST
/* packets to 127.0.0.1 shall not be sent out to netif_default */
START_TEST(test_127_0_0_1)
{
ip4_addr_t localhost;
struct pbuf* p;
LWIP_UNUSED_ARG(_i);
test_netif_add();
netif_set_down(netif_get_loopif());
IP4_ADDR(&localhost, 127, 0, 0, 1);
p = pbuf_alloc(PBUF_IP, 10, PBUF_POOL);
if(ip4_output(p, netif_ip4_addr(netif_default), &localhost, 0, 0, IP_PROTO_UDP) != ERR_OK) {
pbuf_free(p);
}
fail_unless(linkoutput_ctr == 0);
}
END_TEST
/** Create the suite including all tests for this module */
Suite *
@ -155,6 +225,7 @@ ip4_suite(void)
{
testfunc tests[] = {
TESTFUNC(test_ip4_reass),
TESTFUNC(test_127_0_0_1),
};
return create_suite("IPv4", tests, sizeof(tests)/sizeof(testfunc), ip4_setup, ip4_teardown);
}