bus: add support for serializing to gvariant

[elogind.git] / src / libsystemd-bus / bus-message.h

diff --git a/src/libsystemd-bus/bus-message.h b/src/libsystemd-bus/bus-message.h
index 8eea46baf17edb35d0b12553682d45db763dc91a..b862cb9443b60cde358d2b7d91faab032ee22585 100644 (file)
--- a/src/libsystemd-bus/bus-message.h
+++ b/src/libsystemd-bus/bus-message.h
@@ -29,15 +29,23 @@
 #include "sd-bus.h"
 #include "kdbus.h"
 #include "time-util.h"
+#include "bus-creds.h"
+#include "bus-protocol.h"
 
 struct bus_container {
         char enclosing;
 
+        unsigned index, saved_index;
+
         char *signature;
-        unsigned index;
 
         uint32_t *array_size;
-        size_t begin;
+        size_t before, begin;
+
+        size_t *offsets;
+        size_t n_offsets, n_allocated;
+
+        bool need_offsets;
 };
 
 struct bus_header {
@@ -50,9 +58,23 @@ struct bus_header {
         uint32_t fields_size;
 } _packed_;
 
+struct bus_body_part {
+        struct bus_body_part *next;
+        void *data;
+        size_t size;
+        size_t mapped;
+        int memfd;
+        bool free_this:1;
+        bool munmap_this:1;
+        bool sealed:1;
+        bool is_zero:1;
+};
+
 struct sd_bus_message {
         unsigned n_ref;
 
+        sd_bus *bus;
+
         uint32_t reply_serial;
 
         const char *path;
@@ -63,32 +85,29 @@ struct sd_bus_message {
 
         sd_bus_error error;
 
-        uid_t uid;
-        gid_t gid;
-        pid_t pid;
-        pid_t tid;
-        usec_t pid_starttime;
-        usec_t timestamp;
+        sd_bus_creds creds;
+
+        usec_t monotonic;
+        usec_t realtime;
 
         bool sealed:1;
         bool dont_send:1;
         bool allow_fds:1;
-        bool uid_valid:1;
-        bool gid_valid:1;
         bool free_header:1;
-        bool free_fields:1;
-        bool free_body:1;
         bool free_kdbus:1;
         bool free_fds:1;
+        bool release_kdbus:1;
+        bool poisoned:1;
+        bool is_gvariant:1;
 
         struct bus_header *header;
-        void *fields;
-        void *body;
-        struct kdbus_msg *kdbus;
-
-        char *label;
+        struct bus_body_part body;
+        struct bus_body_part *body_end;
+        unsigned n_body_parts;
 
         size_t rindex;
+        struct bus_body_part *cached_rindex_part;
+        size_t cached_rindex_part_begin;
 
         uint32_t n_fds;
         int *fds;
@@ -96,18 +115,29 @@ struct sd_bus_message {
         struct bus_container root_container, *containers;
         unsigned n_containers;
 
-        struct iovec iovec[4];
+        struct iovec *iovec;
+        struct iovec iovec_fixed[2];
         unsigned n_iovec;
 
+        struct kdbus_msg *kdbus;
+
         char *peeked_signature;
 
+        /* If set replies to this message must carry the signature
+         * specified here to successfully seal. This is initialized
+         * from the vtable data */
+        const char *enforced_reply_signature;
+
         usec_t timeout;
 
         char sender_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
         char destination_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
+
+        size_t header_offsets[_BUS_MESSAGE_HEADER_MAX];
+        unsigned n_header_offsets;
 };
 
-#define BUS_MESSAGE_NEED_BSWAP(m) ((m)->header->endian != SD_BUS_NATIVE_ENDIAN)
+#define BUS_MESSAGE_NEED_BSWAP(m) ((m)->header->endian != BUS_NATIVE_ENDIAN)
 
 static inline uint16_t BUS_MESSAGE_BSWAP16(sd_bus_message *m, uint16_t u) {
         return BUS_MESSAGE_NEED_BSWAP(m) ? bswap_16(u) : u;
@@ -140,18 +170,22 @@ static inline uint32_t BUS_MESSAGE_SIZE(sd_bus_message *m) {
                 BUS_MESSAGE_BODY_SIZE(m);
 }
 
-static inline void bus_message_unrefp(sd_bus_message **m) {
-        sd_bus_message_unref(*m);
+static inline uint32_t BUS_MESSAGE_BODY_BEGIN(sd_bus_message *m) {
+        return
+                sizeof(struct bus_header) +
+                ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m));
 }
 
-#define _cleanup_bus_message_unref_ __attribute__((cleanup(bus_message_unrefp)))
+static inline void* BUS_MESSAGE_FIELDS(sd_bus_message *m) {
+        return (uint8_t*) m->header + sizeof(struct bus_header);
+}
 
 int bus_message_seal(sd_bus_message *m, uint64_t serial);
-int bus_message_dump(sd_bus_message *m);
 int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz);
 int bus_message_read_strv_extend(sd_bus_message *m, char ***l);
 
 int bus_message_from_header(
+                sd_bus *bus,
                 void *header,
                 size_t length,
                 int *fds,
@@ -162,6 +196,7 @@ int bus_message_from_header(
                 sd_bus_message **ret);
 
 int bus_message_from_malloc(
+                sd_bus *bus,
                 void *buffer,
                 size_t length,
                 int *fds,
@@ -176,4 +211,17 @@ int bus_message_append_ap(sd_bus_message *m, const char *types, va_list ap);
 
 int bus_message_parse_fields(sd_bus_message *m);
 
-int bus_header_size(struct bus_header *h, size_t *sum);
+bool bus_header_is_complete(struct bus_header *h, size_t size);
+int bus_header_message_size(struct bus_header *h, size_t *sum);
+
+struct bus_body_part *message_append_part(sd_bus_message *m);
+
+#define MESSAGE_FOREACH_PART(part, i, m) \
+        for ((i) = 0, (part) = &(m)->body; (i) < (m)->n_body_parts; (i)++, (part) = (part)->next)
+
+int bus_body_part_map(struct bus_body_part *part);
+void bus_body_part_unmap(struct bus_body_part *part);
+
+int bus_message_to_errno(sd_bus_message *m);
+
+int bus_message_new_synthetic_error(sd_bus *bus, uint64_t serial, const sd_bus_error *e, sd_bus_message **m);