connman: Implement subnet route in session

Implement subnet route creation/deletion in session, e.g.

default via 192.168.100.1 dev eth0
192.168.100.0/24 dev eth0

(From OE-Core rev: d6ac8a53d05124cbe34bc6673cb46091b50c7643)

Signed-off-by: Jian Liang <jianliang@tycoint.com>
Signed-off-by: André Draszik <andre.draszik@jci.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

4 files changed, 277 insertions, 0 deletions

diff --git a/meta/recipes-connectivity/connman/connman/0001-inet-Add-prefixlen-to-iproute_default_function.patch b/meta/recipes-connectivity/connman/connman/0001-inet-Add-prefixlen-to-iproute_default_function.patch
new file mode 100644
index 0000000000..dd7b356741
--- /dev/null
+++ b/meta/recipes-connectivity/connman/connman/0001-inet-Add-prefixlen-to-iproute_default_function.patch
@@ -0,0 +1,63 @@
+From 508dc60a1f0758ebc586b6b086478a176d493086 Mon Sep 17 00:00:00 2001
+From: Jian Liang <jianliang@tycoint.com>
+Date: Thu, 5 Oct 2017 09:34:41 +0100
+Subject: [PATCH 1/4] inet: Add prefixlen to iproute_default_function
+To: connman@lists.01.org
+Cc: wagi@monom.org
+
+Add prefixlen parameter to this function in preparation for using
+it also in creating subnet route later, e.g.
+
+default via 192.168.100.1 dev eth0
+192.168.100.0/24 dev eth0
+
+Signed-off-by: Jian Liang <jianliang@tycoint.com>
+
+---
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=edda5b695de2ee79f02314abc9b46fdd46b388e1]
+Signed-off-by: André Draszik <andre.draszik@jci.com>
+ src/inet.c | 7 ++++---
+ 1 file changed, 4 insertions(+), 3 deletions(-)
+
+diff --git a/src/inet.c b/src/inet.c
+index b887aa0..ab8aec8 100644
+--- a/src/inet.c
++++ b/src/inet.c
+@@ -2796,7 +2796,7 @@ int __connman_inet_del_fwmark_rule(uint32_t table_id, int family, uint32_t fwmar
+ }
+ 
+ static int iproute_default_modify(int cmd, uint32_t table_id, int ifindex,
+-                       const char *gateway)
++                       const char *gateway, unsigned char prefixlen)
+ {
+        struct __connman_inet_rtnl_handle rth;
+        unsigned char buf[sizeof(struct in6_addr)];
+@@ -2829,6 +2829,7 @@ static int iproute_default_modify(int cmd, uint32_t table_id, int ifindex,
+        rth.req.u.r.rt.rtm_protocol = RTPROT_BOOT;
+        rth.req.u.r.rt.rtm_scope = RT_SCOPE_UNIVERSE;
+        rth.req.u.r.rt.rtm_type = RTN_UNICAST;
++       rth.req.u.r.rt.rtm_dst_len = prefixlen;
+ 
+        __connman_inet_rtnl_addattr_l(&rth.req.n, sizeof(rth.req), RTA_GATEWAY,
+                                                                buf, len);
+@@ -2860,7 +2861,7 @@ int __connman_inet_add_default_to_table(uint32_t table_id, int ifindex,
+ {
+        /* ip route add default via 1.2.3.4 dev wlan0 table 1234 */
+ 
+-       return iproute_default_modify(RTM_NEWROUTE, table_id, ifindex, gateway);
++       return iproute_default_modify(RTM_NEWROUTE, table_id, ifindex, gateway, 0);
+ }
+ 
+ int __connman_inet_del_default_from_table(uint32_t table_id, int ifindex,
+@@ -2868,7 +2869,7 @@ int __connman_inet_del_default_from_table(uint32_t table_id, int ifindex,
+ {
+        /* ip route del default via 1.2.3.4 dev wlan0 table 1234 */
+ 
+-       return iproute_default_modify(RTM_DELROUTE, table_id, ifindex, gateway);
++       return iproute_default_modify(RTM_DELROUTE, table_id, ifindex, gateway, 0);
+ }
+ 
+ int __connman_inet_get_interface_ll_address(int index, int family,
+-- 
+2.7.4
+
diff --git a/meta/recipes-connectivity/connman/connman/0002-inet-Implement-subnet-route-creation-deletion-in-ipr.patch b/meta/recipes-connectivity/connman/connman/0002-inet-Implement-subnet-route-creation-deletion-in-ipr.patch
new file mode 100644
index 0000000000..9c953e5d51
--- /dev/null
+++ b/meta/recipes-connectivity/connman/connman/0002-inet-Implement-subnet-route-creation-deletion-in-ipr.patch
@@ -0,0 +1,69 @@
+From 08cda4004491d3971a8b9df937426c43800d15b1 Mon Sep 17 00:00:00 2001
+From: Jian Liang <jianliang@tycoint.com>
+Date: Thu, 5 Oct 2017 09:37:06 +0100
+Subject: [PATCH 2/4] inet: Implement subnet route creation/deletion in
+ iproute_default_modify
+To: connman@lists.01.org
+Cc: wagi@monom.org
+
+- Calculate subnet address base on gateway address and prefixlen
+- Differentiate creation of routes to gateway and subnet
+
+Signed-off-by: Jian Liang <jianliang@tycoint.com>
+
+---
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=ff7dcf91f12a2a237feebc6e606d0a8e92975528]
+Signed-off-by: André Draszik <andre.draszik@jci.com>
+ src/inet.c | 22 +++++++++++++++++++---
+ 1 file changed, 19 insertions(+), 3 deletions(-)
+
+diff --git a/src/inet.c b/src/inet.c
+index ab8aec8..0ddb030 100644
+--- a/src/inet.c
++++ b/src/inet.c
+@@ -2802,6 +2802,9 @@ static int iproute_default_modify(int cmd, uint32_t table_id, int ifindex,
+        unsigned char buf[sizeof(struct in6_addr)];
+        int ret, len;
+        int family = connman_inet_check_ipaddress(gateway);
++       char *dst = NULL;
++
++       DBG("gateway %s/%u table %u", gateway, prefixlen, table_id);
+ 
+        switch (family) {
+        case AF_INET:
+@@ -2814,7 +2817,19 @@ static int iproute_default_modify(int cmd, uint32_t table_id, int ifindex,
+                return -EINVAL;
+        }
+ 
+-       ret = inet_pton(family, gateway, buf);
++       if (prefixlen) {
++               struct in_addr ipv4_subnet_addr, ipv4_mask;
++
++               memset(&ipv4_subnet_addr, 0, sizeof(ipv4_subnet_addr));
++               ipv4_mask.s_addr = htonl((0xffffffff << (32 - prefixlen)) & 0xffffffff);
++               ipv4_subnet_addr.s_addr = inet_addr(gateway);
++               ipv4_subnet_addr.s_addr &= ipv4_mask.s_addr;
++
++               dst = g_strdup(inet_ntoa(ipv4_subnet_addr));
++       }
++
++       ret = inet_pton(family, dst ? dst : gateway, buf);
++       g_free(dst);
+        if (ret <= 0)
+                return -EINVAL;
+ 
+@@ -2831,8 +2846,9 @@ static int iproute_default_modify(int cmd, uint32_t table_id, int ifindex,
+        rth.req.u.r.rt.rtm_type = RTN_UNICAST;
+        rth.req.u.r.rt.rtm_dst_len = prefixlen;
+ 
+-       __connman_inet_rtnl_addattr_l(&rth.req.n, sizeof(rth.req), RTA_GATEWAY,
+-                                                               buf, len);
++       __connman_inet_rtnl_addattr_l(&rth.req.n, sizeof(rth.req),
++               prefixlen > 0 ? RTA_DST : RTA_GATEWAY, buf, len);
++
+        if (table_id < 256) {
+                rth.req.u.r.rt.rtm_table = table_id;
+        } else {
+-- 
+2.7.4
+
diff --git a/meta/recipes-connectivity/connman/connman/0003-inet-Implement-APIs-for-creating-and-deleting-subnet.patch b/meta/recipes-connectivity/connman/connman/0003-inet-Implement-APIs-for-creating-and-deleting-subnet.patch
new file mode 100644
index 0000000000..56ba5c3f4b
--- /dev/null
+++ b/meta/recipes-connectivity/connman/connman/0003-inet-Implement-APIs-for-creating-and-deleting-subnet.patch
@@ -0,0 +1,68 @@
+From a9243f13d6e1aadd69bfcc27f75f69c38be51677 Mon Sep 17 00:00:00 2001
+From: Jian Liang <jianliang@tycoint.com>
+Date: Wed, 4 Oct 2017 17:30:17 +0100
+Subject: [PATCH 3/4] inet: Implement APIs for creating and deleting subnet
+ route
+To: connman@lists.01.org
+Cc: wagi@monom.org
+
+Signed-off-by: Jian Liang <jianliang@tycoint.com>
+
+---
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=3a15b0b7fccd053aff91da2cc68585509d0c509b]
+Signed-off-by: André Draszik <andre.draszik@jci.com>
+ src/connman.h |  4 ++++
+ src/inet.c    | 14 ++++++++++++++
+ 2 files changed, 18 insertions(+)
+
+diff --git a/src/connman.h b/src/connman.h
+index 21b7080..da4446a 100644
+--- a/src/connman.h
++++ b/src/connman.h
+@@ -240,7 +240,11 @@ int __connman_inet_rtnl_addattr32(struct nlmsghdr *n, size_t maxlen,
+ int __connman_inet_add_fwmark_rule(uint32_t table_id, int family, uint32_t fwmark);
+ int __connman_inet_del_fwmark_rule(uint32_t table_id, int family, uint32_t fwmark);
+ int __connman_inet_add_default_to_table(uint32_t table_id, int ifindex, const char *gateway);
++int __connman_inet_add_subnet_to_table(uint32_t table_id, int ifindex,
++                       const char *gateway, unsigned char prefixlen);
+ int __connman_inet_del_default_from_table(uint32_t table_id, int ifindex, const char *gateway);
++int __connman_inet_del_subnet_from_table(uint32_t table_id, int ifindex,
++                       const char *gateway, unsigned char prefixlen);
+ int __connman_inet_get_address_netmask(int ifindex,
+                struct sockaddr_in *address, struct sockaddr_in *netmask);
+ 
+diff --git a/src/inet.c b/src/inet.c
+index 0ddb030..dcd1ab2 100644
+--- a/src/inet.c
++++ b/src/inet.c
+@@ -2880,6 +2880,13 @@ int __connman_inet_add_default_to_table(uint32_t table_id, int ifindex,
+        return iproute_default_modify(RTM_NEWROUTE, table_id, ifindex, gateway, 0);
+ }
+ 
++int __connman_inet_add_subnet_to_table(uint32_t table_id, int ifindex,
++                                               const char *gateway, unsigned char prefixlen)
++{
++       /* ip route add 1.2.3.4/24 dev eth0 table 1234 */
++       return iproute_default_modify(RTM_NEWROUTE, table_id, ifindex, gateway, prefixlen);
++}
++
+ int __connman_inet_del_default_from_table(uint32_t table_id, int ifindex,
+                                                const char *gateway)
+ {
+@@ -2888,6 +2895,13 @@ int __connman_inet_del_default_from_table(uint32_t table_id, int ifindex,
+        return iproute_default_modify(RTM_DELROUTE, table_id, ifindex, gateway, 0);
+ }
+ 
++int __connman_inet_del_subnet_from_table(uint32_t table_id, int ifindex,
++                                               const char *gateway, unsigned char prefixlen)
++{
++       /* ip route del 1.2.3.4/24 dev eth0 table 1234 */
++       return iproute_default_modify(RTM_DELROUTE, table_id, ifindex, gateway, prefixlen);
++}
++
+ int __connman_inet_get_interface_ll_address(int index, int family,
+                                                                void *address)
+ {
+-- 
+2.7.4
+
diff --git a/meta/recipes-connectivity/connman/connman/0004-session-Use-subnet-route-creation-and-deletion-APIs.patch b/meta/recipes-connectivity/connman/connman/0004-session-Use-subnet-route-creation-and-deletion-APIs.patch
new file mode 100644
index 0000000000..ca213eb18b
--- /dev/null
+++ b/meta/recipes-connectivity/connman/connman/0004-session-Use-subnet-route-creation-and-deletion-APIs.patch
@@ -0,0 +1,77 @@
+From deb9372db8396da4f7cd20555ce7c9a8b3ad96bd Mon Sep 17 00:00:00 2001
+From: Jian Liang <jianliang@tycoint.com>
+Date: Fri, 6 Oct 2017 11:40:16 +0100
+Subject: [PATCH 4/4] session: Use subnet route creation and deletion APIs
+To: connman@lists.01.org
+Cc: wagi@monom.org
+
+As subnet route is address and session specific in this case, so add
+prefixlen into struct connman_session, and update it along with ipconfig.
+Then use it in subnet route related APIs.
+
+Signed-off-by: Jian Liang <jianliang@tycoint.com>
+
+---
+Upstream-Status: Backport [https://git.kernel.org/pub/scm/network/connman/connman.git/commit/?id=285f25ef6cc9e4a43dab83523f3e2eab4365ac26]
+Signed-off-by: André Draszik <andre.draszik@jci.com>
+ src/session.c | 20 ++++++++++++++++----
+ 1 file changed, 16 insertions(+), 4 deletions(-)
+
+diff --git a/src/session.c b/src/session.c
+index 965ac06..7b7a14b 100644
+--- a/src/session.c
++++ b/src/session.c
+@@ -67,6 +67,7 @@ struct connman_session {
+        int index;
+        char *addr;
+        char *gateway;
++       unsigned char prefixlen;
+        bool policy_routing;
+        bool snat_enabled;
+ };
+@@ -357,13 +358,17 @@ static void del_default_route(struct connman_session *session)
+        if (!session->gateway)
+                return;
+ 
+-       DBG("index %d routing table %d default gateway %s",
+-               session->index, session->mark, session->gateway);
++       DBG("index %d routing table %d default gateway %s/%u",
++               session->index, session->mark, session->gateway, session->prefixlen);
++
++               __connman_inet_del_subnet_from_table(session->mark,
++                       session->index, session->gateway, session->prefixlen);
+ 
+        __connman_inet_del_default_from_table(session->mark,
+                                        session->index, session->gateway);
+        g_free(session->gateway);
+        session->gateway = NULL;
++       session->prefixlen = 0;
+        session->index = -1;
+ }
+ 
+@@ -383,13 +388,20 @@ static void add_default_route(struct connman_session *session)
+        if (!session->gateway)
+                session->gateway = g_strdup(inet_ntoa(addr));
+ 
+-       DBG("index %d routing table %d default gateway %s",
+-               session->index, session->mark, session->gateway);
++       session->prefixlen = __connman_ipconfig_get_prefixlen(ipconfig);
++
++       DBG("index %d routing table %d default gateway %s/%u",
++               session->index, session->mark, session->gateway, session->prefixlen);
+ 
+        err = __connman_inet_add_default_to_table(session->mark,
+                                        session->index, session->gateway);
+        if (err < 0)
+                DBG("session %p %s", session, strerror(-err));
++
++       err = __connman_inet_add_subnet_to_table(session->mark,
++                                       session->index, session->gateway, session->prefixlen);
++       if (err < 0)
++               DBG("session add subnet route %p %s", session, strerror(-err));
+ }
+ 
+ static void del_nat_rules(struct connman_session *session)
+-- 
+2.7.4
+