X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Flibsystemd-bus%2Fsd-bus.c;h=4f004add2e72b953be5d47e9eed5c4e5292629d0;hp=6acc59e82c49401ce486e618401a4afbd1c93b78;hb=2b4ac8896bdc6cc5159088d7d208559d53caacf3;hpb=531991b64d1fd28218c48bab364ef8c4e80354fa

diff --git a/src/libsystemd-bus/sd-bus.c b/src/libsystemd-bus/sd-bus.c
index 6acc59e82..4f004add2 100644
--- a/src/libsystemd-bus/sd-bus.c
+++ b/src/libsystemd-bus/sd-bus.c
@@ -37,6 +37,7 @@
 #include "bus-message.h"
 #include "bus-type.h"
 #include "bus-socket.h"
+#include "bus-control.h"
 
 static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec);
 
@@ -47,12 +48,11 @@ static void bus_free(sd_bus *b) {
 
         assert(b);
 
-        if (b->fd >= 0)
-                close_nointr_nofail(b->fd);
+        sd_bus_close(b);
 
         free(b->rbuffer);
         free(b->unique_name);
-        free(b->auth_uid);
+        free(b->auth_buffer);
         free(b->address);
 
         free(b->exec_path);
@@ -84,6 +84,8 @@ static void bus_free(sd_bus *b) {
 
         hashmap_free(b->object_callbacks);
 
+        bus_match_free(&b->match_callbacks);
+
         free(b);
 }
 
@@ -98,7 +100,7 @@ int sd_bus_new(sd_bus **ret) {
                 return -ENOMEM;
 
         r->n_ref = 1;
-        r->fd = -1;
+        r->input_fd = r->output_fd = -1;
         r->message_version = 1;
         r->negotiate_fds = true;
 
@@ -134,15 +136,18 @@ int sd_bus_set_address(sd_bus *bus, const char *address) {
         return 0;
 }
 
-int sd_bus_set_fd(sd_bus *bus, int fd) {
+int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) {
         if (!bus)
                 return -EINVAL;
         if (bus->state != BUS_UNSET)
                 return -EPERM;
-        if (fd < 0)
+        if (input_fd < 0)
+                return -EINVAL;
+        if (output_fd < 0)
                 return -EINVAL;
 
-        bus->fd = fd;
+        bus->input_fd = input_fd;
+        bus->output_fd = output_fd;
         return 0;
 }
 
@@ -197,6 +202,29 @@ int sd_bus_set_negotiate_fds(sd_bus *bus, int b) {
         return 0;
 }
 
+int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) {
+        if (!bus)
+                return -EINVAL;
+        if (!b && !sd_id128_equal(server_id, SD_ID128_NULL))
+                return -EINVAL;
+        if (bus->state != BUS_UNSET)
+                return -EPERM;
+
+        bus->is_server = !!b;
+        bus->server_id = server_id;
+        return 0;
+}
+
+int sd_bus_set_anonymous(sd_bus *bus, int b) {
+        if (!bus)
+                return -EINVAL;
+        if (bus->state != BUS_UNSET)
+                return -EPERM;
+
+        bus->anonymous_auth = !!b;
+        return 0;
+}
+
 static int hello_callback(sd_bus *bus, int error, sd_bus_message *reply, void *userdata) {
         const char *s;
         int r;
@@ -244,11 +272,7 @@ static int bus_send_hello(sd_bus *bus) {
         if (r < 0)
                 return r;
 
-        r = sd_bus_send_with_reply(bus, m, hello_callback, NULL, 0, NULL);
-        if (r < 0)
-                return r;
-
-        return r;
+        return sd_bus_send_with_reply(bus, m, hello_callback, NULL, 0, &bus->hello_serial);
 }
 
 int bus_start_running(sd_bus *bus) {
@@ -507,7 +531,7 @@ static int parse_exec_address(sd_bus *b, const char **p, char **guid) {
 
                         errno = 0;
                         ul = strtoul(*p + 4, (char**) p, 10);
-                        if (errno != 0 || **p != '=' || ul > 256) {
+                        if (errno > 0 || **p != '=' || ul > 256) {
                                 r = -EINVAL;
                                 goto fail;
                         }
@@ -582,7 +606,7 @@ static void bus_reset_parsed_address(sd_bus *b) {
         free(b->exec_path);
         b->exec_path = NULL;
         b->exec_argv = NULL;
-        b->peer = SD_ID128_NULL;
+        b->server_id = SD_ID128_NULL;
 }
 
 static int bus_parse_next_address(sd_bus *b) {
@@ -642,7 +666,7 @@ static int bus_parse_next_address(sd_bus *b) {
         }
 
         if (guid) {
-                r = sd_id128_from_string(guid, &b->peer);
+                r = sd_id128_from_string(guid, &b->server_id);
                 if (r < 0)
                         return r;
         }
@@ -657,10 +681,7 @@ static int bus_start_address(sd_bus *b) {
         assert(b);
 
         for (;;) {
-                if (b->fd >= 0) {
-                        close_nointr_nofail(b->fd);
-                        b->fd = -1;
-                }
+                sd_bus_close(b);
 
                 if (b->sockaddr.sa.sa_family != AF_UNSPEC) {
 
@@ -698,15 +719,27 @@ static int bus_start_fd(sd_bus *b) {
         int r;
 
         assert(b);
+        assert(b->input_fd >= 0);
+        assert(b->output_fd >= 0);
 
-        r = fd_nonblock(b->fd, true);
+        r = fd_nonblock(b->input_fd, true);
         if (r < 0)
                 return r;
 
-        r = fd_cloexec(b->fd, true);
+        r = fd_cloexec(b->input_fd, true);
         if (r < 0)
                 return r;
 
+        if (b->input_fd != b->output_fd) {
+                r = fd_nonblock(b->output_fd, true);
+                if (r < 0)
+                        return r;
+
+                r = fd_cloexec(b->output_fd, true);
+                if (r < 0)
+                        return r;
+        }
+
         return bus_socket_take_fd(b);
 }
 
@@ -720,9 +753,12 @@ int sd_bus_start(sd_bus *bus) {
 
         bus->state = BUS_OPENING;
 
-        if (bus->fd >= 0)
+        if (bus->is_server && bus->bus_client)
+                return -EINVAL;
+
+        if (bus->input_fd >= 0)
                 r = bus_start_fd(bus);
-        else if (bus->address)
+        else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path)
                 r = bus_start_address(bus);
         else
                 return -EINVAL;
@@ -823,11 +859,13 @@ fail:
 void sd_bus_close(sd_bus *bus) {
         if (!bus)
                 return;
-        if (bus->fd < 0)
-                return;
 
-        close_nointr_nofail(bus->fd);
-        bus->fd = -1;
+        if (bus->input_fd >= 0)
+                close_nointr_nofail(bus->input_fd);
+        if (bus->output_fd >= 0 && bus->output_fd != bus->input_fd)
+                close_nointr_nofail(bus->output_fd);
+
+        bus->input_fd = bus->output_fd = -1;
 }
 
 sd_bus *sd_bus_ref(sd_bus *bus) {
@@ -857,7 +895,7 @@ int sd_bus_is_open(sd_bus *bus) {
         if (!bus)
                 return -EINVAL;
 
-        return bus->state != BUS_UNSET && bus->fd >= 0;
+        return bus->state != BUS_UNSET && bus->input_fd >= 0;
 }
 
 int sd_bus_can_send(sd_bus *bus, char type) {
@@ -865,7 +903,7 @@ int sd_bus_can_send(sd_bus *bus, char type) {
 
         if (!bus)
                 return -EINVAL;
-        if (bus->fd < 0)
+        if (bus->output_fd < 0)
                 return -ENOTCONN;
 
         if (type == SD_BUS_TYPE_UNIX_FD) {
@@ -882,19 +920,19 @@ int sd_bus_can_send(sd_bus *bus, char type) {
         return bus_type_is_valid(type);
 }
 
-int sd_bus_get_peer(sd_bus *bus, sd_id128_t *peer) {
+int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) {
         int r;
 
         if (!bus)
                 return -EINVAL;
-        if (!peer)
+        if (!server_id)
                 return -EINVAL;
 
         r = bus_ensure_running(bus);
         if (r < 0)
                 return r;
 
-        *peer = bus->peer;
+        *server_id = bus->server_id;
         return 0;
 }
 
@@ -916,7 +954,7 @@ static int dispatch_wqueue(sd_bus *bus) {
         assert(bus);
         assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
 
-        if (bus->fd < 0)
+        if (bus->output_fd < 0)
                 return -ENOTCONN;
 
         while (bus->wqueue_size > 0) {
@@ -959,7 +997,7 @@ static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) {
         assert(m);
         assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO);
 
-        if (bus->fd < 0)
+        if (bus->input_fd < 0)
                 return -ENOTCONN;
 
         if (bus->rqueue_size > 0) {
@@ -995,7 +1033,7 @@ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) {
                 return -EINVAL;
         if (bus->state == BUS_UNSET)
                 return -ENOTCONN;
-        if (bus->fd < 0)
+        if (bus->output_fd < 0)
                 return -ENOTCONN;
         if (!m)
                 return -EINVAL;
@@ -1092,7 +1130,7 @@ static int timeout_compare(const void *a, const void *b) {
 int sd_bus_send_with_reply(
                 sd_bus *bus,
                 sd_bus_message *m,
-                sd_message_handler_t callback,
+                sd_bus_message_handler_t callback,
                 void *userdata,
                 uint64_t usec,
                 uint64_t *serial) {
@@ -1104,7 +1142,7 @@ int sd_bus_send_with_reply(
                 return -EINVAL;
         if (bus->state == BUS_UNSET)
                 return -ENOTCONN;
-        if (bus->fd < 0)
+        if (bus->output_fd < 0)
                 return -ENOTCONN;
         if (!m)
                 return -EINVAL;
@@ -1186,7 +1224,7 @@ int bus_ensure_running(sd_bus *bus) {
 
         assert(bus);
 
-        if (bus->fd < 0)
+        if (bus->input_fd < 0)
                 return -ENOTCONN;
         if (bus->state == BUS_UNSET)
                 return -ENOTCONN;
@@ -1223,7 +1261,7 @@ int sd_bus_send_with_reply_and_block(
 
         if (!bus)
                 return -EINVAL;
-        if (bus->fd < 0)
+        if (bus->output_fd < 0)
                 return -ENOTCONN;
         if (bus->state == BUS_UNSET)
                 return -ENOTCONN;
@@ -1333,11 +1371,12 @@ int sd_bus_send_with_reply_and_block(
 int sd_bus_get_fd(sd_bus *bus) {
         if (!bus)
                 return -EINVAL;
-
-        if (bus->fd < 0)
+        if (bus->input_fd < 0)
                 return -ENOTCONN;
+        if (bus->input_fd != bus->output_fd)
+                return -EPERM;
 
-        return bus->fd;
+        return bus->input_fd;
 }
 
 int sd_bus_get_events(sd_bus *bus) {
@@ -1347,14 +1386,14 @@ int sd_bus_get_events(sd_bus *bus) {
                 return -EINVAL;
         if (bus->state == BUS_UNSET)
                 return -ENOTCONN;
-        if (bus->fd < 0)
+        if (bus->input_fd < 0)
                 return -ENOTCONN;
 
         if (bus->state == BUS_OPENING)
                 flags |= POLLOUT;
         else if (bus->state == BUS_AUTHENTICATING) {
 
-                if (bus->auth_index < ELEMENTSOF(bus->auth_iovec))
+                if (bus_socket_auth_needs_write(bus))
                         flags |= POLLOUT;
 
                 flags |= POLLIN;
@@ -1378,7 +1417,7 @@ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) {
                 return -EINVAL;
         if (bus->state == BUS_UNSET)
                 return -ENOTCONN;
-        if (bus->fd < 0)
+        if (bus->input_fd < 0)
                 return -ENOTCONN;
 
         if (bus->state == BUS_AUTHENTICATING) {
@@ -1421,6 +1460,28 @@ static int process_timeout(sd_bus *bus) {
         return r < 0 ? r : 1;
 }
 
+static int process_hello(sd_bus *bus, sd_bus_message *m) {
+        assert(bus);
+        assert(m);
+
+        if (bus->state != BUS_HELLO)
+                return 0;
+
+        /* Let's make sure the first message on the bus is the HELLO
+         * reply. But note that we don't actually parse the message
+         * here (we leave that to the usual handling), we just verify
+         * we don't let any earlier msg through. */
+
+        if (m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_RETURN &&
+            m->header->type != SD_BUS_MESSAGE_TYPE_METHOD_ERROR)
+                return -EIO;
+
+        if (m->reply_serial != bus->hello_serial)
+                return -EIO;
+
+        return 0;
+}
+
 static int process_reply(sd_bus *bus, sd_bus_message *m) {
         struct reply_callback *c;
         int r;
@@ -1449,6 +1510,9 @@ static int process_filter(sd_bus *bus, sd_bus_message *m) {
         struct filter_callback *l;
         int r;
 
+        assert(bus);
+        assert(m);
+
         LIST_FOREACH(callbacks, l, bus->filter_callbacks) {
                 r = l->callback(bus, 0, m, l->userdata);
                 if (r != 0)
@@ -1458,6 +1522,13 @@ static int process_filter(sd_bus *bus, sd_bus_message *m) {
         return 0;
 }
 
+static int process_match(sd_bus *bus, sd_bus_message *m) {
+        assert(bus);
+        assert(m);
+
+        return bus_match_run(bus, &bus->match_callbacks, 0, m);
+}
+
 static int process_builtin(sd_bus *bus, sd_bus_message *m) {
         _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
         int r;
@@ -1675,6 +1746,10 @@ static int process_message(sd_bus *bus, sd_bus_message *m) {
         assert(bus);
         assert(m);
 
+        r = process_hello(bus, m);
+        if (r != 0)
+                return r;
+
         r = process_reply(bus, m);
         if (r != 0)
                 return r;
@@ -1683,6 +1758,10 @@ static int process_message(sd_bus *bus, sd_bus_message *m) {
         if (r != 0)
                 return r;
 
+        r = process_match(bus, m);
+        if (r != 0)
+                return r;
+
         r = process_builtin(bus, m);
         if (r != 0)
                 return r;
@@ -1759,7 +1838,7 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
 
         if (!bus)
                 return -EINVAL;
-        if (bus->fd < 0)
+        if (bus->input_fd < 0)
                 return -ENOTCONN;
 
         switch (bus->state) {
@@ -1794,14 +1873,14 @@ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) {
 }
 
 static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) {
-        struct pollfd p;
-        int r, e;
+        struct pollfd p[2];
+        int r, e, n;
         struct timespec ts;
         usec_t until, m;
 
         assert(bus);
 
-        if (bus->fd < 0)
+        if (bus->input_fd < 0)
                 return -ENOTCONN;
 
         e = sd_bus_get_events(bus);
@@ -1817,19 +1896,28 @@ static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) {
         if (r == 0)
                 m = (uint64_t) -1;
         else {
-                usec_t n;
-                n = now(CLOCK_MONOTONIC);
-                m = until > n ? until - n : 0;
+                usec_t nw;
+                nw = now(CLOCK_MONOTONIC);
+                m = until > nw ? until - nw : 0;
         }
 
         if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m))
                 m = timeout_usec;
 
         zero(p);
-        p.fd = bus->fd;
-        p.events = e;
+        p[0].fd = bus->input_fd;
+
+        if (bus->output_fd == bus->input_fd) {
+                p[0].events = e;
+                n = 1;
+        } else {
+                p[0].events = e & POLLIN;
+                p[1].fd = bus->output_fd;
+                p[1].events = e & POLLOUT;
+                n = 2;
+        }
 
-        r = ppoll(&p, 1, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL);
+        r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL);
         if (r < 0)
                 return -errno;
 
@@ -1842,7 +1930,7 @@ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) {
                 return -EINVAL;
         if (bus->state == BUS_UNSET)
                 return -ENOTCONN;
-        if (bus->fd < 0)
+        if (bus->input_fd < 0)
                 return -ENOTCONN;
         if (bus->rqueue_size > 0)
                 return 0;
@@ -1857,7 +1945,7 @@ int sd_bus_flush(sd_bus *bus) {
                 return -EINVAL;
         if (bus->state == BUS_UNSET)
                 return -ENOTCONN;
-        if (bus->fd < 0)
+        if (bus->output_fd < 0)
                 return -ENOTCONN;
 
         r = bus_ensure_running(bus);
@@ -1881,7 +1969,7 @@ int sd_bus_flush(sd_bus *bus) {
         }
 }
 
-int sd_bus_add_filter(sd_bus *bus, sd_message_handler_t callback, void *userdata) {
+int sd_bus_add_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) {
         struct filter_callback *f;
 
         if (!bus)
@@ -1899,7 +1987,7 @@ int sd_bus_add_filter(sd_bus *bus, sd_message_handler_t callback, void *userdata
         return 0;
 }
 
-int sd_bus_remove_filter(sd_bus *bus, sd_message_handler_t callback, void *userdata) {
+int sd_bus_remove_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) {
         struct filter_callback *f;
 
         if (!bus)
@@ -1922,7 +2010,7 @@ static int bus_add_object(
                 sd_bus *bus,
                 bool fallback,
                 const char *path,
-                sd_message_handler_t callback,
+                sd_bus_message_handler_t callback,
                 void *userdata) {
 
         struct object_callback *c;
@@ -1967,7 +2055,7 @@ static int bus_remove_object(
                 sd_bus *bus,
                 bool fallback,
                 const char *path,
-                sd_message_handler_t callback,
+                sd_bus_message_handler_t callback,
                 void *userdata) {
 
         struct object_callback *c;
@@ -1994,18 +2082,63 @@ static int bus_remove_object(
         return 1;
 }
 
-int sd_bus_add_object(sd_bus *bus, const char *path, sd_message_handler_t callback, void *userdata) {
+int sd_bus_add_object(sd_bus *bus, const char *path, sd_bus_message_handler_t callback, void *userdata) {
         return bus_add_object(bus, false, path, callback, userdata);
 }
 
-int sd_bus_remove_object(sd_bus *bus, const char *path, sd_message_handler_t callback, void *userdata) {
+int sd_bus_remove_object(sd_bus *bus, const char *path, sd_bus_message_handler_t callback, void *userdata) {
         return bus_remove_object(bus, false, path, callback, userdata);
 }
 
-int sd_bus_add_fallback(sd_bus *bus, const char *prefix, sd_message_handler_t callback, void *userdata) {
+int sd_bus_add_fallback(sd_bus *bus, const char *prefix, sd_bus_message_handler_t callback, void *userdata) {
         return bus_add_object(bus, true, prefix, callback, userdata);
 }
 
-int sd_bus_remove_fallback(sd_bus *bus, const char *prefix, sd_message_handler_t callback, void *userdata) {
+int sd_bus_remove_fallback(sd_bus *bus, const char *prefix, sd_bus_message_handler_t callback, void *userdata) {
         return bus_remove_object(bus, true, prefix, callback, userdata);
 }
+
+int sd_bus_add_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) {
+        int r = 0;
+
+        if (!bus)
+                return -EINVAL;
+        if (!match)
+                return -EINVAL;
+
+        if (bus->bus_client) {
+                r = bus_add_match_internal(bus, match);
+                if (r < 0)
+                        return r;
+        }
+
+        if (callback) {
+                r = bus_match_add(&bus->match_callbacks, match, callback, userdata, NULL);
+                if (r < 0) {
+
+                        if (bus->bus_client)
+                                bus_remove_match_internal(bus, match);
+                }
+        }
+
+        return r;
+}
+
+int sd_bus_remove_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) {
+        int r = 0, q = 0;
+
+        if (!bus)
+                return -EINVAL;
+        if (!match)
+                return -EINVAL;
+
+        if (bus->bus_client)
+                r = bus_remove_match_internal(bus, match);
+
+        if (callback)
+                q = bus_match_remove(&bus->match_callbacks, match, callback, userdata);
+
+        if (r < 0)
+                return r;
+        return q;
+}