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faced issue in App crash in Android 13 and above #1

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63 changes: 24 additions & 39 deletions android/app/src/main/c/ipneigh.c
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Original file line number Diff line number Diff line change
Expand Up @@ -314,7 +314,8 @@ void ipneigh_reset_filter(int ifindex) {
filter.index = ifindex;
}

static int do_show_or_flush(FILE *mypipe) {
static int do_show_or_flush(struct rtnl_handle *rth, FILE *mypipe) {
// Construct the request
struct {
struct nlmsghdr n;
struct ndmsg ndm;
Expand All @@ -323,45 +324,23 @@ static int do_show_or_flush(FILE *mypipe) {
.n.nlmsg_type = RTM_GETNEIGH,
.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
};
static int preferred_family = AF_UNSPEC;
ipneigh_reset_filter(0);
if (!filter.family)
filter.family = preferred_family;
filter.state = 0xFF & ~NUD_NOARP;

// RTM_GETLINK forbidden by Android API 30
// ll_init_map(&rth);
req.ndm.ndm_family = filter.family;
if (rtnl_dump_request_n(&rth, &req.n) < 0) {
perror("Cannot send dump request");
exit(1);
}
if (rtnl_dump_filter(&rth, print_neigh, mypipe) < 0) {
fprintf(stderr, "Dump terminated\n");
exit(1);
}
return 0;
}

int Java_com_com_system_1scan_1kt_portauthority_ScanHostsAsyncTask_nativeIPNeigh(JNIEnv *env,
jobject thiz,
jint fileDescriptor) {
// Set up filter options if needed
ipneigh_reset_filter(0);

FILE *mypipe = fdopen(fileDescriptor, "w");
if (mypipe == NULL) {
perror("Cannot fdopen");
exit(EXIT_FAILURE);
// Send the request
if (rtnl_dump_request_n(rth, &req.n) < 0) {
perror("Cannot send dump request");
return EXIT_FAILURE;
}

if (rtnl_open(&rth, 0) < 0)
exit(1);

int res = do_show_or_flush(mypipe);

rtnl_close(&rth);
fclose(mypipe);
// Process the response
if (rtnl_dump_filter(rth, print_neigh, mypipe) < 0) {
fprintf(stderr, "Dump terminated\n");
return EXIT_FAILURE;
}

return res;
return EXIT_SUCCESS;
}

JNIEXPORT jint JNICALL
Expand All @@ -374,13 +353,19 @@ Java_com_system_1scan_1kt_portauthority_ScanHostsAsyncTask_nativeIPNeigh(JNIEnv
exit(EXIT_FAILURE);
}

if (rtnl_open(&rth, 0) < 0)
exit(1);
// Initialize rtnl_handle
struct rtnl_handle rth = {.fd = -1};
if (rtnl_open(&rth, 0) < 0) {
fclose(mypipe);
return EXIT_FAILURE;
}

int res = do_show_or_flush(mypipe);
// Perform the required operation
int res = do_show_or_flush(&rth, mypipe);

// Clean up resources
rtnl_close(&rth);
fclose(mypipe);

return res;
}
}