netifd: Add acceptlocal config support

Adds support to accept packets with local source address.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

diff --git a/device.c b/device.c
index d261e25..aa5818f 100644 (file)
--- a/device.c
+++ b/device.c
@@ -40,6 +40,7 @@ static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
        [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
        [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
        [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
+       [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
 };
 
 const struct uci_blob_param_list device_attr_list = {
@@ -156,6 +157,7 @@ device_merge_settings(struct device *dev, struct device_settings *n)
        n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
        n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
        n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
+       n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
        n->flags = s->flags | os->flags;
 }
 
@@ -206,6 +208,11 @@ device_init_settings(struct device *dev, struct blob_attr **tb)
                        DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
        }
 
+       if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
+               s->acceptlocal = blobmsg_get_bool(cur);
+               s->flags |= DEV_OPT_ACCEPTLOCAL;
+       }
+
        device_set_disabled(dev, disabled);
 }
 
@@ -745,6 +752,8 @@ device_dump_status(struct blob_buf *b, struct device *dev)
                        blobmsg_add_u8(b, "promisc", st.promisc);
                if (st.flags & DEV_OPT_RPFILTER)
                        blobmsg_add_u32(b, "rpfilter", st.rpfilter);
+               if (st.flags & DEV_OPT_ACCEPTLOCAL)
+                       blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
        }
 
        s = blobmsg_open_table(b, "statistics");

diff --git a/device.h b/device.h
index 0af65be..8569be7 100644 (file)
--- a/device.h
+++ b/device.h
@@ -34,6 +34,7 @@ enum {
        DEV_ATTR_IPV6,
        DEV_ATTR_PROMISC,
        DEV_ATTR_RPFILTER,
+       DEV_ATTR_ACCEPTLOCAL,
        __DEV_ATTR_MAX,
 };
 
@@ -68,6 +69,7 @@ enum {
        DEV_OPT_IPV6            = (1 << 3),
        DEV_OPT_PROMISC         = (1 << 4),
        DEV_OPT_RPFILTER        = (1 << 5),
+       DEV_OPT_ACCEPTLOCAL     = (1 << 6),
 };
 
 /* events broadcasted to all users of a device */
@@ -116,6 +118,7 @@ struct device_settings {
        bool ipv6;
        bool promisc;
        unsigned int rpfilter;
+       bool acceptlocal;
 };
 
 /*

diff --git a/system-linux.c b/system-linux.c
index bb7ccf9..83827d5 100644 (file)
--- a/system-linux.c
+++ b/system-linux.c
@@ -270,6 +270,11 @@ static void system_set_rpfilter(struct device *dev, const char *val)
        system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/rp_filter", dev->ifname, val);
 }
 
+static void system_set_acceptlocal(struct device *dev, const char *val)
+{
+       system_set_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local", dev->ifname, val);
+}
+
 static int system_get_sysctl(const char *path, char *buf, const size_t buf_sz)
 {
        int fd = -1, ret = -1;
@@ -310,6 +315,12 @@ static int system_get_rpfilter(struct device *dev, char *buf, const size_t buf_s
                        dev->ifname, buf, buf_sz);
 }
 
+static int system_get_acceptlocal(struct device *dev, char *buf, const size_t buf_sz)
+{
+       return system_get_dev_sysctl("/proc/sys/net/ipv4/conf/%s/accept_local",
+                       dev->ifname, buf, buf_sz);
+}
+
 // Evaluate netlink messages
 static int cb_rtnl_event(struct nl_msg *msg, void *arg)
 {
@@ -969,6 +980,11 @@ system_if_get_settings(struct device *dev, struct device_settings *s)
                s->rpfilter = strtoul(buf, NULL, 0);
                s->flags |= DEV_OPT_RPFILTER;
        }
+
+       if (!system_get_acceptlocal(dev, buf, sizeof(buf))) {
+               s->acceptlocal = strtoul(buf, NULL, 0);
+               s->flags |= DEV_OPT_ACCEPTLOCAL;
+       }
 }
 
 void
@@ -1010,6 +1026,8 @@ system_if_apply_settings(struct device *dev, struct device_settings *s, unsigned
                snprintf(buf, sizeof(buf), "%d", s->rpfilter);
                system_set_rpfilter(dev, buf);
        }
+       if (s->flags & DEV_OPT_ACCEPTLOCAL & apply_mask)
+               system_set_acceptlocal(dev, s->acceptlocal ? "1" : "0");
 }
 
 int system_if_up(struct device *dev)