add support for launching a long running command from a proto-shell handler that...

diff --git a/dummy/netifd-proto.sh b/dummy/netifd-proto.sh
index 85e8698..c50d776 100755 (executable)
--- a/dummy/netifd-proto.sh
+++ b/dummy/netifd-proto.sh
@@ -47,6 +47,7 @@ proto_init_update() {
        PROTO_ROUTE=
        PROTO_ROUTE6=
        json_init
+       json_add_int action 0
        json_add_string "ifname" "$ifname"
        json_add_boolean "link-up" "$up"
        [ -n "$3" ] && json_add_boolean "address-external" "$external"
@@ -113,6 +114,10 @@ _proto_push_array() {
        json_close_array
 }
 
+_proto_notify() {
+       ubus call network.interface."$interface" notify_proto "$(json_dump)"
+}
+
 proto_send_update() {
        local interface="$1"
 
@@ -120,7 +125,18 @@ proto_send_update() {
        _proto_push_array "ip6addr" "$PROTO_IP6ADDR" _proto_push_ip
        _proto_push_array "route" "$PROTO_ROUTE" _proto_push_route
        _proto_push_array "route6" "$PROTO_ROUTE6" _proto_push_route
-       ubus call network.interface."$interface" notify_proto "$(json_dump)" &
+       _proto_notify
+}
+
+proto_run_command() {
+       json_init
+       json_add_int action 1
+       json_add_array command
+       while [ $# -gt 0 ]; do
+               json_add_string "" "$1"
+               shift
+       done
+       _proto_notify
 }
 
 init_proto() {

diff --git a/dummy/proto/ppp.sh b/dummy/proto/ppp.sh
index adce2ca..13c4ebb 100755 (executable)
--- a/dummy/proto/ppp.sh
+++ b/dummy/proto/ppp.sh
@@ -39,6 +39,7 @@ pppoe_setup() {
        proto_init_update ppp0 1
        proto_add_ipv4_address "192.168.2.1" 32
        proto_send_update "$1"
+       proto_run_command sleep 10
 }
 
 pppoe_teardown() {

diff --git a/proto-shell.c b/proto-shell.c
index 65ade12..ee2366f 100644 (file)
--- a/proto-shell.c
+++ b/proto-shell.c
@@ -39,13 +39,20 @@ struct proto_shell_state {
        struct uloop_process setup_task;
        struct uloop_process teardown_task;
        bool teardown_pending;
+
+       struct uloop_process proto_task;
 };
 
 static int
-run_script(const char **argv, struct uloop_process *proc)
+start_process(const char **argv, struct uloop_process *proc)
 {
        int pid;
 
+       if (proc->pending) {
+               kill(proc->pid, SIGTERM);
+               uloop_process_delete(proc);
+       }
+
        if ((pid = fork()) < 0)
                return -1;
 
@@ -106,7 +113,7 @@ proto_shell_handler(struct interface_proto_state *proto,
                argv[i++] = proto->iface->main_dev.dev->ifname;
        argv[i] = NULL;
 
-       ret = run_script(argv, proc);
+       ret = start_process(argv, proc);
        free(config);
 
        return ret;
@@ -148,6 +155,17 @@ proto_shell_teardown_cb(struct uloop_process *p, int ret)
 }
 
 static void
+proto_shell_task_cb(struct uloop_process *p, int ret)
+{
+       struct proto_shell_state *state;
+
+       state = container_of(p, struct proto_shell_state, proto_task);
+
+       state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
+       proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
+}
+
+static void
 proto_shell_free(struct interface_proto_state *proto)
 {
        struct proto_shell_state *state;
@@ -265,6 +283,8 @@ proto_shell_parse_route_list(struct interface *iface, struct blob_attr *attr,
 
 
 enum {
+       NOTIFY_ACTION,
+       NOTIFY_COMMAND,
        NOTIFY_LINK_UP,
        NOTIFY_IFNAME,
        NOTIFY_ADDR_EXT,
@@ -276,6 +296,8 @@ enum {
 };
 
 static const struct blobmsg_policy notify_attr[__NOTIFY_LAST] = {
+       [NOTIFY_ACTION] = { .name = "action", .type = BLOBMSG_TYPE_INT32 },
+       [NOTIFY_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_ARRAY },
        [NOTIFY_LINK_UP] = { .name = "link-up", .type = BLOBMSG_TYPE_BOOL },
        [NOTIFY_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
        [NOTIFY_ADDR_EXT] = { .name = "address-external", .type = BLOBMSG_TYPE_BOOL },
@@ -286,16 +308,12 @@ static const struct blobmsg_policy notify_attr[__NOTIFY_LAST] = {
 };
 
 static int
-proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
+proto_shell_update_link(struct proto_shell_state *state, struct blob_attr **tb)
 {
-       struct proto_shell_state *state;
-       struct blob_attr *tb[__NOTIFY_LAST], *cur;
+       struct blob_attr *cur;
        bool addr_ext = false;
        bool up;
 
-       state = container_of(proto, struct proto_shell_state, proto);
-
-       blobmsg_parse(notify_attr, __NOTIFY_LAST, tb, blob_data(attr), blob_len(attr));
        if (!tb[NOTIFY_LINK_UP])
                return UBUS_STATUS_INVALID_ARGUMENT;
 
@@ -333,6 +351,59 @@ proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
        return 0;
 }
 
+static int
+proto_shell_run_command(struct proto_shell_state *state, struct blob_attr **tb)
+{
+       struct blob_attr *cur;
+       char *argv[64];
+       int argc = 0;
+       int rem;
+
+       if (!tb[NOTIFY_COMMAND])
+               goto error;
+
+       blobmsg_for_each_attr(cur, tb[NOTIFY_COMMAND], rem) {
+               if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
+                       goto error;
+
+               if (!blobmsg_check_attr(cur, NULL))
+                       goto error;
+
+               argv[argc++] = blobmsg_data(cur);
+               if (argc == ARRAY_SIZE(argv) - 1)
+                       goto error;
+       }
+       argv[argc] = NULL;
+       start_process((const char **) argv, &state->proto_task);
+
+       return 0;
+
+error:
+       return UBUS_STATUS_INVALID_ARGUMENT;
+}
+
+static int
+proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
+{
+       struct proto_shell_state *state;
+       struct blob_attr *tb[__NOTIFY_LAST];
+
+       state = container_of(proto, struct proto_shell_state, proto);
+
+       blobmsg_parse(notify_attr, __NOTIFY_LAST, tb, blob_data(attr), blob_len(attr));
+       if (!tb[NOTIFY_ACTION])
+               return UBUS_STATUS_INVALID_ARGUMENT;
+
+       switch(blobmsg_get_u32(tb[NOTIFY_ACTION])) {
+       case 0:
+               return proto_shell_update_link(state, tb);
+       case 1:
+               return proto_shell_run_command(state, tb);
+       default:
+               return UBUS_STATUS_INVALID_ARGUMENT;
+       }
+}
+
 struct interface_proto_state *
 proto_shell_attach(const struct proto_handler *h, struct interface *iface,
                   struct blob_attr *attr)
@@ -351,6 +422,7 @@ proto_shell_attach(const struct proto_handler *h, struct interface *iface,
        state->setup_timeout.cb = proto_shell_setup_timeout_cb;
        state->setup_task.cb = proto_shell_setup_cb;
        state->teardown_task.cb = proto_shell_teardown_cb;
+       state->proto_task.cb = proto_shell_task_cb;
        state->handler = container_of(h, struct proto_shell_handler, proto);
 
        return &state->proto;