[LEDE-DEV] [PATCH v2 4/9] firewall3: add UBUS support for redirect sections
pme.lebleu at gmail.com
pme.lebleu at gmail.com
Thu May 4 01:52:54 PDT 2017
From: Pierre Lebleu <pme.lebleu at gmail.com>
It gives the ability to create redirect rules via
procd services and netifd interface firewall data.
Signed-off-by: Pierre Lebleu <pme.lebleu at gmail.com>
---
Notes:
v1->v2:
- remove the assignements within the "if"
- add a new function check_redirect()
- use warn_section() rather than warn()
main.c | 2 +-
redirects.c | 282 ++++++++++++++++++++++++++++++++++-------------------------
redirects.h | 10 ++-
3 files changed, 170 insertions(+), 124 deletions(-)
diff --git a/main.c b/main.c
index e38963d..5888ab5 100644
--- a/main.c
+++ b/main.c
@@ -104,7 +104,7 @@ build_state(bool runtime)
fw3_load_ipsets(state, p);
fw3_load_zones(state, p);
fw3_load_rules(state, p, b.head);
- fw3_load_redirects(state, p);
+ fw3_load_redirects(state, p, b.head);
fw3_load_snats(state, p, b.head);
fw3_load_forwards(state, p);
fw3_load_includes(state, p);
diff --git a/redirects.c b/redirects.c
index a657b6d..e651ddd 100644
--- a/redirects.c
+++ b/redirects.c
@@ -175,159 +175,201 @@ check_local(struct uci_element *e, struct fw3_redirect *redir,
return redir->local;
}
-void
-fw3_load_redirects(struct fw3_state *state, struct uci_package *p)
+static bool
+check_redirect(struct fw3_state *state, struct fw3_redirect *redir, struct uci_element *e)
{
- struct uci_section *s;
- struct uci_element *e;
- struct fw3_redirect *redir;
-
bool valid;
- INIT_LIST_HEAD(&state->redirects);
+ if (!redir->enabled)
+ return false;
- uci_foreach_element(&p->sections, e)
+ if (redir->src.invert)
{
- s = uci_to_section(e);
+ warn_section("redirect", redir, e, "must not have an inverted source");
+ return false;
+ }
+ else if (redir->src.set && !redir->src.any &&
+ !(redir->_src = fw3_lookup_zone(state, redir->src.name)))
+ {
+ warn_section("redirect", redir, e, "refers to not existing zone '%s'",
+ redir->src.name);
+ return false;
+ }
+ else if (redir->dest.set && !redir->dest.any &&
+ !(redir->_dest = fw3_lookup_zone(state, redir->dest.name)))
+ {
+ warn_section("redirect", redir, e, "refers to not existing zone '%s'",
+ redir->dest.name);
+ return false;
+ }
+ else if (redir->ipset.set && state->disable_ipsets)
+ {
+ warn_section("redirect", redir, e, "skipped due to disabled ipset support",
+ redir->name);
+ return false;
+ }
+ else if (redir->ipset.set &&
+ !(redir->ipset.ptr = fw3_lookup_ipset(state, redir->ipset.name)))
+ {
+ warn_section("redirect", redir, e, "refers to unknown ipset '%s'", redir->name,
+ redir->ipset.name);
+ return false;
+ }
- if (strcmp(s->type, "redirect"))
- continue;
+ if (!check_families(e, redir))
+ return false;
- redir = calloc(1, sizeof(*redir));
- if (!redir)
- continue;
+ if (redir->target == FW3_FLAG_UNSPEC)
+ {
+ warn_section("redirect", redir, e, "has no target specified, defaulting to DNAT");
+ redir->target = FW3_FLAG_DNAT;
+ }
+ else if (redir->target < FW3_FLAG_DNAT || redir->target > FW3_FLAG_SNAT)
+ {
+ warn_section("redirect", redir, e, "has invalid target specified, defaulting to DNAT");
+ redir->target = FW3_FLAG_DNAT;
+ }
- INIT_LIST_HEAD(&redir->proto);
- INIT_LIST_HEAD(&redir->mac_src);
+ valid = false;
- redir->enabled = true;
- redir->reflection = true;
+ if (redir->target == FW3_FLAG_DNAT)
+ {
+ if (redir->src.any)
+ warn_section("redirect", redir, e, "must not have source '*' for DNAT target");
+ else if (!redir->_src)
+ warn_section("redirect", redir, e, "has no source specified");
+ else
+ {
+ set(redir->_src->flags, FW3_FAMILY_V4, redir->target);
+ valid = true;
- valid = false;
+ if (!check_local(e, redir, state) && !redir->dest.set &&
+ resolve_dest(e, redir, state))
+ {
+ warn_section("redirect", redir, e,
+ "does not specify a destination, assuming '%s'",
+ redir->dest.name);
+ }
- if (!fw3_parse_options(redir, fw3_redirect_opts, s))
- {
- warn_elem(e, "skipped due to invalid options");
- fw3_free_redirect(redir);
- continue;
+ if (redir->reflection && redir->_dest && redir->_src->masq)
+ {
+ set(redir->_dest->flags, FW3_FAMILY_V4, FW3_FLAG_ACCEPT);
+ set(redir->_dest->flags, FW3_FAMILY_V4, FW3_FLAG_DNAT);
+ set(redir->_dest->flags, FW3_FAMILY_V4, FW3_FLAG_SNAT);
+ }
}
-
- if (!redir->enabled)
+ }
+ else
+ {
+ if (redir->dest.any)
+ warn_section("redirect", redir, e,
+ "must not have destination '*' for SNAT target");
+ else if (!redir->_dest)
+ warn_section("redirect", redir, e, "has no destination specified");
+ else if (!redir->ip_dest.set)
+ warn_section("redirect", redir, e, "has no src_dip option specified");
+ else if (!list_empty(&redir->mac_src))
+ warn_section("redirect", redir, e, "must not use 'src_mac' option for SNAT target");
+ else
{
- fw3_free_redirect(redir);
- continue;
+ set(redir->_dest->flags, FW3_FAMILY_V4, redir->target);
+ valid = true;
}
+ }
- if (redir->src.invert)
- {
- warn_elem(e, "must not have an inverted source");
- fw3_free_redirect(redir);
- continue;
- }
- else if (redir->src.set && !redir->src.any &&
- !(redir->_src = fw3_lookup_zone(state, redir->src.name)))
- {
- warn_elem(e, "refers to not existing zone '%s'", redir->src.name);
- fw3_free_redirect(redir);
+ if (list_empty(&redir->proto))
+ {
+ warn_section("redirect", redir, e, "does not specify a protocol, assuming TCP+UDP");
+ fw3_parse_protocol(&redir->proto, "tcpudp", true);
+ }
+
+ if (!valid)
+ return false;
+
+ if (!redir->port_redir.set)
+ redir->port_redir = redir->port_dest;
+
+ return true;
+}
+
+static struct fw3_redirect *
+fw3_alloc_redirect(struct fw3_state *state)
+{
+ struct fw3_redirect *redir;
+
+ redir = calloc(1, sizeof(*redir));
+ if (!redir)
+ return NULL;
+
+ INIT_LIST_HEAD(&redir->proto);
+ INIT_LIST_HEAD(&redir->mac_src);
+
+ redir->enabled = true;
+ redir->reflection = true;
+
+ list_add_tail(&redir->list, &state->redirects);
+
+ return redir;
+}
+
+void
+fw3_load_redirects(struct fw3_state *state, struct uci_package *p,
+ struct blob_attr *a)
+{
+ struct uci_section *s;
+ struct uci_element *e;
+ struct fw3_redirect *redir;
+ struct blob_attr *entry;
+ unsigned rem;
+
+ INIT_LIST_HEAD(&state->redirects);
+
+ blob_for_each_attr(entry, a, rem)
+ {
+ const char *type;
+ const char *name = "ubus redirect";
+
+ if (!fw3_attr_parse_name_type(entry, &name, &type))
continue;
- }
- else if (redir->dest.set && !redir->dest.any &&
- !(redir->_dest = fw3_lookup_zone(state, redir->dest.name)))
- {
- warn_elem(e, "refers to not existing zone '%s'", redir->dest.name);
- fw3_free_redirect(redir);
+
+ if (strcmp(type, "redirect"))
continue;
- }
- else if (redir->ipset.set && state->disable_ipsets)
- {
- warn_elem(e, "skipped due to disabled ipset support");
- fw3_free_redirect(redir);
+
+ redir = fw3_alloc_redirect(state);
+ if (!redir)
continue;
- }
- else if (redir->ipset.set &&
- !(redir->ipset.ptr = fw3_lookup_ipset(state, redir->ipset.name)))
+
+ if (!fw3_parse_blob_options(redir, fw3_redirect_opts, entry, name))
{
- warn_elem(e, "refers to unknown ipset '%s'", redir->ipset.name);
+ warn_section("redirect", redir, NULL, "skipped due to invalid options");
fw3_free_redirect(redir);
continue;
}
- if (!check_families(e, redir))
- {
+ if (!check_redirect(state, redir, NULL))
fw3_free_redirect(redir);
- continue;
- }
+ }
- if (redir->target == FW3_FLAG_UNSPEC)
- {
- warn_elem(e, "has no target specified, defaulting to DNAT");
- redir->target = FW3_FLAG_DNAT;
- }
- else if (redir->target < FW3_FLAG_DNAT || redir->target > FW3_FLAG_SNAT)
- {
- warn_elem(e, "has invalid target specified, defaulting to DNAT");
- redir->target = FW3_FLAG_DNAT;
- }
+ uci_foreach_element(&p->sections, e)
+ {
+ s = uci_to_section(e);
- if (redir->target == FW3_FLAG_DNAT)
- {
- if (redir->src.any)
- warn_elem(e, "must not have source '*' for DNAT target");
- else if (!redir->_src)
- warn_elem(e, "has no source specified");
- else
- {
- set(redir->_src->flags, FW3_FAMILY_V4, redir->target);
- valid = true;
-
- if (!check_local(e, redir, state) && !redir->dest.set &&
- resolve_dest(e, redir, state))
- {
- warn_elem(e, "does not specify a destination, assuming '%s'",
- redir->dest.name);
- }
-
- if (redir->reflection && redir->_dest && redir->_src->masq)
- {
- set(redir->_dest->flags, FW3_FAMILY_V4, FW3_FLAG_ACCEPT);
- set(redir->_dest->flags, FW3_FAMILY_V4, FW3_FLAG_DNAT);
- set(redir->_dest->flags, FW3_FAMILY_V4, FW3_FLAG_SNAT);
- }
- }
- }
- else
- {
- if (redir->dest.any)
- warn_elem(e, "must not have destination '*' for SNAT target");
- else if (!redir->_dest)
- warn_elem(e, "has no destination specified");
- else if (!redir->ip_dest.set)
- warn_elem(e, "has no src_dip option specified");
- else if (!list_empty(&redir->mac_src))
- warn_elem(e, "must not use 'src_mac' option for SNAT target");
- else
- {
- set(redir->_dest->flags, FW3_FAMILY_V4, redir->target);
- valid = true;
- }
- }
+ if (strcmp(s->type, "redirect"))
+ continue;
- if (list_empty(&redir->proto))
- {
- warn_elem(e, "does not specify a protocol, assuming TCP+UDP");
- fw3_parse_protocol(&redir->proto, "tcpudp", true);
- }
+ redir = fw3_alloc_redirect(state);
+ if (!redir)
+ continue;
- if (!valid)
+ if (!fw3_parse_options(redir, fw3_redirect_opts, s))
{
+ warn_elem(e, "skipped due to invalid options");
fw3_free_redirect(redir);
continue;
}
- if (!redir->port_redir.set)
- redir->port_redir = redir->port_dest;
-
- list_add_tail(&redir->list, &state->redirects);
+ if (!check_redirect(state, redir, e))
+ fw3_free_redirect(redir);
}
}
diff --git a/redirects.h b/redirects.h
index b52d8c3..ac625f4 100644
--- a/redirects.h
+++ b/redirects.h
@@ -27,11 +27,15 @@
extern const struct fw3_option fw3_redirect_opts[];
-void fw3_load_redirects(struct fw3_state *state, struct uci_package *p);
+void fw3_load_redirects(struct fw3_state *state, struct uci_package *p,
+ struct blob_attr *a);
void fw3_print_redirects(struct fw3_ipt_handle *handle,
struct fw3_state *state);
-#define fw3_free_redirect(redir) \
- fw3_free_object(redir, fw3_redirect_opts)
+static inline void fw3_free_redirect(struct fw3_redirect *redir)
+{
+ list_del(&redir->list);
+ fw3_free_object(redir, fw3_redirect_opts);
+}
#endif
--
1.7.9.5
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