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libnetlink: break up dump function

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Indentation is deep here.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
This commit is contained in:
Stephen Hemminger 2016-12-13 10:40:49 -08:00
parent 1949f82cdf
commit 892a25e286
1 changed files with 48 additions and 30 deletions
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78
lib/libnetlink.c
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@ -261,6 +261,48 @@ int rtnl_dump_request_n(struct rtnl_handle *rth, struct nlmsghdr *n)
return sendmsg(rth->fd, &msg, 0);
}
static int rtnl_dump_done(const struct rtnl_handle *rth,
struct nlmsghdr *h)
{
int len = *(int *)NLMSG_DATA(h);
if (rth->proto == NETLINK_SOCK_DIAG) {
if (h->nlmsg_len < NLMSG_LENGTH(sizeof(int))) {
fprintf(stderr, "DONE truncated\n");
return -1;
}
if (len < 0) {
errno = -len;
if (errno == ENOENT || errno == EOPNOTSUPP)
return -1;
perror("RTNETLINK answers");
return len;
}
}
return 0;
}
static void rtnl_dump_error(const struct rtnl_handle *rth,
struct nlmsghdr *h)
{
if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) {
fprintf(stderr, "ERROR truncated\n");
} else {
const struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(h);
errno = -err->error;
if (rth->proto == NETLINK_SOCK_DIAG &&
(errno == ENOENT ||
errno == EOPNOTSUPP))
return;
perror("RTNETLINK answers");
}
}
int rtnl_dump_filter_l(struct rtnl_handle *rth,
const struct rtnl_dump_filter_arg *arg)
{
@ -320,40 +362,16 @@ int rtnl_dump_filter_l(struct rtnl_handle *rth,
dump_intr = 1;
if (h->nlmsg_type == NLMSG_DONE) {
if (rth->proto == NETLINK_SOCK_DIAG) {
if (h->nlmsg_len < NLMSG_LENGTH(sizeof(int))) {
fprintf(stderr, "DONE truncated\n");
return -1;
} else {
int len = *(int *)NLMSG_DATA(h);
if (len < 0) {
errno = -len;
if (errno == ENOENT ||
errno == EOPNOTSUPP)
return -1;
perror("RTNETLINK answers");
return len;
}
}
}
err = rtnl_dump_done(rth, h);
if (err < 0)
return -1;
found_done = 1;
break; /* process next filter */
}
if (h->nlmsg_type == NLMSG_ERROR) {
struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(h);
if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) {
fprintf(stderr,
"ERROR truncated\n");
} else {
errno = -err->error;
if (rth->proto == NETLINK_SOCK_DIAG &&
(errno == ENOENT ||
errno == EOPNOTSUPP))
return -1;
perror("RTNETLINK answers");
}
rtnl_dump_error(rth, h);
return -1;
}