Esempio n. 1
0
int decompress_blob_xz(const void *src, uint64_t src_size,
                       void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max) {

#ifdef HAVE_XZ
        _cleanup_(lzma_end) lzma_stream s = LZMA_STREAM_INIT;
        lzma_ret ret;
        size_t space;

        assert(src);
        assert(src_size > 0);
        assert(dst);
        assert(dst_alloc_size);
        assert(dst_size);
        assert(*dst_alloc_size == 0 || *dst);

        ret = lzma_stream_decoder(&s, UINT64_MAX, 0);
        if (ret != LZMA_OK)
                return -ENOMEM;

        space = MIN(src_size * 2, dst_max ?: (size_t) -1);
        if (!greedy_realloc(dst, dst_alloc_size, space, 1))
                return -ENOMEM;

        s.next_in = src;
        s.avail_in = src_size;

        s.next_out = *dst;
        s.avail_out = space;

        for (;;) {
                size_t used;

                ret = lzma_code(&s, LZMA_FINISH);

                if (ret == LZMA_STREAM_END)
                        break;
                else if (ret != LZMA_OK)
                        return -ENOMEM;

                if (dst_max > 0 && (space - s.avail_out) >= dst_max)
                        break;
                else if (dst_max > 0 && space == dst_max)
                        return -ENOBUFS;

                used = space - s.avail_out;
                space = MIN(2 * space, dst_max ?: (size_t) -1);
                if (!greedy_realloc(dst, dst_alloc_size, space, 1))
                        return -ENOMEM;

                s.avail_out = space - used;
                s.next_out = *dst + used;
        }

        *dst_size = space - s.avail_out;
        return 0;
#else
        return -EPROTONOSUPPORT;
#endif
}
Esempio n. 2
0
int decompress_startswith_xz(const void *src, uint64_t src_size,
                             void **buffer, size_t *buffer_size,
                             const void *prefix, size_t prefix_len,
                             uint8_t extra) {

#ifdef HAVE_XZ
        _cleanup_(lzma_end) lzma_stream s = LZMA_STREAM_INIT;
        lzma_ret ret;

        /* Checks whether the decompressed blob starts with the
         * mentioned prefix. The byte extra needs to follow the
         * prefix */

        assert(src);
        assert(src_size > 0);
        assert(buffer);
        assert(buffer_size);
        assert(prefix);
        assert(*buffer_size == 0 || *buffer);

        ret = lzma_stream_decoder(&s, UINT64_MAX, 0);
        if (ret != LZMA_OK)
                return -EBADMSG;

        if (!(greedy_realloc(buffer, buffer_size, ALIGN_8(prefix_len + 1), 1)))
                return -ENOMEM;

        s.next_in = src;
        s.avail_in = src_size;

        s.next_out = *buffer;
        s.avail_out = *buffer_size;

        for (;;) {
                ret = lzma_code(&s, LZMA_FINISH);

                if (ret != LZMA_STREAM_END && ret != LZMA_OK)
                        return -EBADMSG;

                if (*buffer_size - s.avail_out >= prefix_len + 1)
                        return memcmp(*buffer, prefix, prefix_len) == 0 &&
                                ((const uint8_t*) *buffer)[prefix_len] == extra;

                if (ret == LZMA_STREAM_END)
                        return 0;

                s.avail_out += *buffer_size;

                if (!(greedy_realloc(buffer, buffer_size, *buffer_size * 2, 1)))
                        return -ENOMEM;

                s.next_out = *buffer + *buffer_size - s.avail_out;
        }

#else
        return -EPROTONOSUPPORT;
#endif
}
Esempio n. 3
0
void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) {
        size_t prev;
        uint8_t *q;

        assert(p);
        assert(allocated);

        prev = *allocated;

        q = greedy_realloc(p, allocated, need, size);
        if (!q)
                return NULL;

        if (*allocated > prev)
                memzero(q + prev * size, (*allocated - prev) * size);

        return q;
}
Esempio n. 4
0
int decompress_startswith_lz4(const void *src, uint64_t src_size,
                              void **buffer, size_t *buffer_size,
                              const void *prefix, size_t prefix_len,
                              uint8_t extra) {
#ifdef HAVE_LZ4
        /* Checks whether the decompressed blob starts with the
         * mentioned prefix. The byte extra needs to follow the
         * prefix */

        int r;

        assert(src);
        assert(src_size > 0);
        assert(buffer);
        assert(buffer_size);
        assert(prefix);
        assert(*buffer_size == 0 || *buffer);

        if (src_size <= 8)
                return -EBADMSG;

        if (!(greedy_realloc(buffer, buffer_size, ALIGN_8(prefix_len + 1), 1)))
                return -ENOMEM;

        r = LZ4_decompress_safe_partial(src + 8, *buffer, src_size - 8,
                                        prefix_len + 1, *buffer_size);

        if (r < 0)
                return -EBADMSG;
        if ((unsigned) r >= prefix_len + 1)
                return memcmp(*buffer, prefix, prefix_len) == 0 &&
                        ((const uint8_t*) *buffer)[prefix_len] == extra;
        else
                return 0;

#else
        return -EPROTONOSUPPORT;
#endif
}
Esempio n. 5
0
static int parse_env_file_internal(
                const char *fname,
                const char *newline,
                int (*push) (const char *key, char *value, void *userdata),
                void *userdata) {

        _cleanup_free_ char *contents = NULL, *key = NULL;
        size_t key_alloc = 0, n_key = 0, value_alloc = 0, n_value = 0, last_value_whitespace = (size_t) -1, last_key_whitespace = (size_t) -1;
        char *p, *value = NULL;
        int r;

        enum {
                PRE_KEY,
                KEY,
                PRE_VALUE,
                VALUE,
                VALUE_ESCAPE,
                SINGLE_QUOTE_VALUE,
                SINGLE_QUOTE_VALUE_ESCAPE,
                DOUBLE_QUOTE_VALUE,
                DOUBLE_QUOTE_VALUE_ESCAPE,
                COMMENT,
                COMMENT_ESCAPE
        } state = PRE_KEY;

        assert(fname);
        assert(newline);

        r = read_full_file(fname, &contents, NULL);
        if (r < 0)
                return r;

        for (p = contents; *p; p++) {
                char c = *p;

                switch (state) {

                case PRE_KEY:
                        if (strchr(COMMENTS, c))
                                state = COMMENT;
                        else if (!strchr(WHITESPACE, c)) {
                                state = KEY;
                                last_key_whitespace = (size_t) -1;

                                if (!greedy_realloc((void**) &key, &key_alloc, n_key+2)) {
                                        r = -ENOMEM;
                                        goto fail;
                                }

                                key[n_key++] = c;
                        }
                        break;

                case KEY:
                        if (strchr(newline, c)) {
                                state = PRE_KEY;
                                n_key = 0;
                        } else if (c == '=') {
                                state = PRE_VALUE;
                                last_value_whitespace = (size_t) -1;
                        } else {
                                if (!strchr(WHITESPACE, c))
                                        last_key_whitespace = (size_t) -1;
                                else if (last_key_whitespace == (size_t) -1)
                                         last_key_whitespace = n_key;

                                if (!greedy_realloc((void**) &key, &key_alloc, n_key+2)) {
                                        r = -ENOMEM;
                                        goto fail;
                                }

                                key[n_key++] = c;
                        }

                        break;

                case PRE_VALUE:
                        if (strchr(newline, c)) {
                                state = PRE_KEY;
                                key[n_key] = 0;

                                if (value)
                                        value[n_value] = 0;

                                /* strip trailing whitespace from key */
                                if (last_key_whitespace != (size_t) -1)
                                        key[last_key_whitespace] = 0;

                                r = push(key, value, userdata);
                                if (r < 0)
                                        goto fail;

                                n_key = 0;
                                value = NULL;
                                value_alloc = n_value = 0;

                        } else if (c == '\'')
                                state = SINGLE_QUOTE_VALUE;
                        else if (c == '\"')
                                state = DOUBLE_QUOTE_VALUE;
                        else if (c == '\\')
                                state = VALUE_ESCAPE;
                        else if (!strchr(WHITESPACE, c)) {
                                state = VALUE;

                                if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
                                        r = -ENOMEM;
                                        goto fail;
                                }

                                value[n_value++] = c;
                        }

                        break;

                case VALUE:
                        if (strchr(newline, c)) {
                                state = PRE_KEY;

                                key[n_key] = 0;

                                if (value)
                                        value[n_value] = 0;

                                /* Chomp off trailing whitespace from value */
                                if (last_value_whitespace != (size_t) -1)
                                        value[last_value_whitespace] = 0;

                                /* strip trailing whitespace from key */
                                if (last_key_whitespace != (size_t) -1)
                                        key[last_key_whitespace] = 0;

                                r = push(key, value, userdata);
                                if (r < 0)
                                        goto fail;

                                n_key = 0;
                                value = NULL;
                                value_alloc = n_value = 0;

                        } else if (c == '\\') {
                                state = VALUE_ESCAPE;
                                last_value_whitespace = (size_t) -1;
                        } else {
                                if (!strchr(WHITESPACE, c))
                                        last_value_whitespace = (size_t) -1;
                                else if (last_value_whitespace == (size_t) -1)
                                        last_value_whitespace = n_value;

                                if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
                                        r = -ENOMEM;
                                        goto fail;
                                }

                                value[n_value++] = c;
                        }

                        break;

                case VALUE_ESCAPE:
                        state = VALUE;

                        if (!strchr(newline, c)) {
                                /* Escaped newlines we eat up entirely */
                                if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
                                        r = -ENOMEM;
                                        goto fail;
                                }

                                value[n_value++] = c;
                        }
                        break;

                case SINGLE_QUOTE_VALUE:
                        if (c == '\'')
                                state = PRE_VALUE;
                        else if (c == '\\')
                                state = SINGLE_QUOTE_VALUE_ESCAPE;
                        else {
                                if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
                                        r = -ENOMEM;
                                        goto fail;
                                }

                                value[n_value++] = c;
                        }

                        break;

                case SINGLE_QUOTE_VALUE_ESCAPE:
                        state = SINGLE_QUOTE_VALUE;

                        if (!strchr(newline, c)) {
                                if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
                                        r = -ENOMEM;
                                        goto fail;
                                }

                                value[n_value++] = c;
                        }
                        break;

                case DOUBLE_QUOTE_VALUE:
                        if (c == '\"')
                                state = PRE_VALUE;
                        else if (c == '\\')
                                state = DOUBLE_QUOTE_VALUE_ESCAPE;
                        else {
                                if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
                                        r = -ENOMEM;
                                        goto fail;
                                }

                                value[n_value++] = c;
                        }

                        break;

                case DOUBLE_QUOTE_VALUE_ESCAPE:
                        state = DOUBLE_QUOTE_VALUE;

                        if (!strchr(newline, c)) {
                                if (!greedy_realloc((void**) &value, &value_alloc, n_value+2)) {
                                        r = -ENOMEM;
                                        goto fail;
                                }

                                value[n_value++] = c;
                        }
                        break;

                case COMMENT:
                        if (c == '\\')
                                state = COMMENT_ESCAPE;
                        else if (strchr(newline, c))
                                state = PRE_KEY;
                        break;

                case COMMENT_ESCAPE:
                        state = COMMENT;
                        break;
                }
        }

        if (state == PRE_VALUE ||
            state == VALUE ||
            state == VALUE_ESCAPE ||
            state == SINGLE_QUOTE_VALUE ||
            state == SINGLE_QUOTE_VALUE_ESCAPE ||
            state == DOUBLE_QUOTE_VALUE ||
            state == DOUBLE_QUOTE_VALUE_ESCAPE) {

                key[n_key] = 0;

                if (value)
                        value[n_value] = 0;

                if (state == VALUE)
                        if (last_value_whitespace != (size_t) -1)
                                value[last_value_whitespace] = 0;

                /* strip trailing whitespace from key */
                if (last_key_whitespace != (size_t) -1)
                        key[last_key_whitespace] = 0;

                r = push(key, value, userdata);
                if (r < 0)
                        goto fail;
        }

        return 0;

fail:
        free(value);
        return r;
}
Esempio n. 6
0
/* returns the number of bytes sent, or a negative error code */
int socket_write_message(sd_rtnl *nl, sd_rtnl_message *m) {
        union {
                struct sockaddr sa;
                struct sockaddr_nl nl;
        } addr = {
                .nl.nl_family = AF_NETLINK,
        };
        ssize_t k;

        assert(nl);
        assert(m);
        assert(m->hdr);

        k = sendto(nl->fd, m->hdr, m->hdr->nlmsg_len,
                        0, &addr.sa, sizeof(addr));
        if (k < 0)
                return (errno == EAGAIN) ? 0 : -errno;

        return k;
}

static int socket_recv_message(int fd, struct iovec *iov, uint32_t *_group, bool peek) {
        uint8_t cred_buffer[CMSG_SPACE(sizeof(struct ucred)) +
                            CMSG_SPACE(sizeof(struct nl_pktinfo))];
        struct msghdr msg = {
                .msg_iov = iov,
                .msg_iovlen = 1,
                .msg_control = cred_buffer,
                .msg_controllen = sizeof(cred_buffer),
        };
        struct cmsghdr *cmsg;
        uint32_t group = 0;
        bool auth = false;
        int r;

        assert(fd >= 0);
        assert(iov);

        r = recvmsg(fd, &msg, MSG_TRUNC | (peek ? MSG_PEEK : 0));
        if (r < 0) {
                /* no data */
                if (errno == ENOBUFS)
                        log_debug("rtnl: kernel receive buffer overrun");

                return (errno == EAGAIN) ? 0 : -errno;
        } else if (r == 0)
                /* connection was closed by the kernel */
                return -ECONNRESET;

        for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
                if (cmsg->cmsg_level == SOL_SOCKET &&
                    cmsg->cmsg_type == SCM_CREDENTIALS &&
                    cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) {
                        struct ucred *ucred = (void *)CMSG_DATA(cmsg);

                        /* from the kernel */
                        if (ucred->uid == 0 && ucred->pid == 0)
                                auth = true;
                } else if (cmsg->cmsg_level == SOL_NETLINK &&
                           cmsg->cmsg_type == NETLINK_PKTINFO &&
                           cmsg->cmsg_len == CMSG_LEN(sizeof(struct nl_pktinfo))) {
                        struct nl_pktinfo *pktinfo = (void *)CMSG_DATA(cmsg);

                        /* multi-cast group */
                        group = pktinfo->group;
                }
        }

        if (!auth)
                /* not from the kernel, ignore */
                return 0;

        if (group)
                *_group = group;

        return r;
}

/* On success, the number of bytes received is returned and *ret points to the received message
 * which has a valid header and the correct size.
 * If nothing useful was received 0 is returned.
 * On failure, a negative error code is returned.
 */
int socket_read_message(sd_rtnl *rtnl) {
        _cleanup_rtnl_message_unref_ sd_rtnl_message *first = NULL;
        struct iovec iov = {};
        uint32_t group = 0;
        bool multi_part = false, done = false;
        struct nlmsghdr *new_msg;
        size_t len;
        int r;
        unsigned i = 0;

        assert(rtnl);
        assert(rtnl->rbuffer);
        assert(rtnl->rbuffer_allocated >= sizeof(struct nlmsghdr));

        /* read nothing, just get the pending message size */
        r = socket_recv_message(rtnl->fd, &iov, &group, true);
        if (r <= 0)
                return r;
        else
                len = (size_t)r;

        /* make room for the pending message */
        if (!greedy_realloc((void **)&rtnl->rbuffer,
                            &rtnl->rbuffer_allocated,
                            len, sizeof(uint8_t)))
                return -ENOMEM;

        iov.iov_base = rtnl->rbuffer;
        iov.iov_len = rtnl->rbuffer_allocated;

        /* read the pending message */
        r = socket_recv_message(rtnl->fd, &iov, &group, false);
        if (r <= 0)
                return r;
        else
                len = (size_t)r;

        if (len > rtnl->rbuffer_allocated)
                /* message did not fit in read buffer */
                return -EIO;

        if (NLMSG_OK(rtnl->rbuffer, len) && rtnl->rbuffer->nlmsg_flags & NLM_F_MULTI) {
                multi_part = true;

                for (i = 0; i < rtnl->rqueue_partial_size; i++) {
                        if (rtnl_message_get_serial(rtnl->rqueue_partial[i]) ==
                            rtnl->rbuffer->nlmsg_seq) {
                                first = rtnl->rqueue_partial[i];
                                break;
                        }
                }
        }

        for (new_msg = rtnl->rbuffer; NLMSG_OK(new_msg, len); new_msg = NLMSG_NEXT(new_msg, len)) {
                _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
                const NLType *nl_type;

                if (!group && new_msg->nlmsg_pid != rtnl->sockaddr.nl.nl_pid)
                        /* not broadcast and not for us */
                        continue;

                if (new_msg->nlmsg_type == NLMSG_NOOP)
                        /* silently drop noop messages */
                        continue;

                if (new_msg->nlmsg_type == NLMSG_DONE) {
                        /* finished reading multi-part message */
                        done = true;
                        break;
                }

                /* check that we support this message type */
                r = type_system_get_type(NULL, &nl_type, new_msg->nlmsg_type);
                if (r < 0) {
                        if (r == -ENOTSUP)
                                log_debug("sd-rtnl: ignored message with unknown type: %u",
                                          new_msg->nlmsg_type);

                        continue;
                }

                /* check that the size matches the message type */
                if (new_msg->nlmsg_len < NLMSG_LENGTH(nl_type->size))
                        continue;

                r = message_new_empty(rtnl, &m);
                if (r < 0)
                        return r;

                m->hdr = memdup(new_msg, new_msg->nlmsg_len);
                if (!m->hdr)
                        return -ENOMEM;

                /* seal and parse the top-level message */
                r = sd_rtnl_message_rewind(m);
                if (r < 0)
                        return r;

                /* push the message onto the multi-part message stack */
                if (first)
                        m->next = first;
                first = m;
                m = NULL;
        }

        if (len)
                log_debug("sd-rtnl: discarding %zu bytes of incoming message", len);

        if (!first)
                return 0;

        if (!multi_part || done) {
                /* we got a complete message, push it on the read queue */
                r = rtnl_rqueue_make_room(rtnl);
                if (r < 0)
                        return r;

                rtnl->rqueue[rtnl->rqueue_size ++] = first;
                first = NULL;

                if (multi_part && (i < rtnl->rqueue_partial_size)) {
                        /* remove the message form the partial read queue */
                        memmove(rtnl->rqueue_partial + i,rtnl->rqueue_partial + i + 1,
                                sizeof(sd_rtnl_message*) * (rtnl->rqueue_partial_size - i - 1));
                        rtnl->rqueue_partial_size --;
                }

                return 1;
        } else {
                /* we only got a partial multi-part message, push it on the
                   partial read queue */
                if (i < rtnl->rqueue_partial_size) {
                        rtnl->rqueue_partial[i] = first;
                } else {
                        r = rtnl_rqueue_partial_make_room(rtnl);
                        if (r < 0)
                                return r;

                        rtnl->rqueue_partial[rtnl->rqueue_partial_size ++] = first;
                }
                first = NULL;

                return 0;
        }
}
Esempio n. 7
0
size_t buxton_serialize_message(uint8_t **dest, BuxtonControlMessage message,
				uint32_t msgid, BuxtonArray *list)
{
	uint16_t i = 0;
	uint8_t *data = NULL;
	size_t ret = 0;
	size_t offset = 0;
	size_t size = 0;
	size_t curSize = 0;
	uint16_t control, msg;

	assert(dest);
	assert(list);

	buxton_debug("Serializing message...\n");

	if (list->len > BUXTON_MESSAGE_MAX_PARAMS) {
		errno = EINVAL;
		return ret;
	}

	if (message >= BUXTON_CONTROL_MAX || message < BUXTON_CONTROL_SET) {
		errno = EINVAL;
		return ret;
	}

	/*
	 * initial size =
	 * control code + control message (uint16_t * 2) +
	 * message size (uint32_t) +
	 * message id (uint32_t) +
	 * param count (uint32_t)
	 */
	data = malloc0(sizeof(uint32_t) + sizeof(uint32_t) + sizeof(uint32_t) +
		       sizeof(uint32_t));
	if (!data) {
		errno = ENOMEM;
		goto end;
	}

	control = BUXTON_CONTROL_CODE;
	memcpy(data, &control, sizeof(uint16_t));
	offset += sizeof(uint16_t);

	msg = (uint16_t)message;
	memcpy(data+offset, &msg, sizeof(uint16_t));
	offset += sizeof(uint16_t);

	/* Save room for final size */
	offset += sizeof(uint32_t);

	memcpy(data+offset, &msgid, sizeof(uint32_t));
	offset += sizeof(uint32_t);

	/* Now write the parameter count */
	memcpy(data+offset, &(list->len), sizeof(uint32_t));
	offset += sizeof(uint32_t);

	size = offset;

	/* Deal with parameters */
	BuxtonData *param;
	size_t p_length = 0;
	for (i=0; i < list->len; i++) {
		param = buxton_array_get(list, i);
		if (!param) {
			errno = EINVAL;
			goto fail;
		}

		switch (param->type) {
		case BUXTON_TYPE_STRING:
			p_length = param->store.d_string.length;
			break;
		case BUXTON_TYPE_INT32:
			p_length = sizeof(int32_t);
			break;
		case BUXTON_TYPE_UINT32:
			p_length = sizeof(uint32_t);
			break;
		case BUXTON_TYPE_INT64:
			p_length = sizeof(int64_t);
			break;
		case BUXTON_TYPE_UINT64:
			p_length = sizeof(uint64_t);
			break;
		case BUXTON_TYPE_FLOAT:
			p_length = sizeof(float);
			break;
		case BUXTON_TYPE_DOUBLE:
			p_length = sizeof(double);
			break;
		case BUXTON_TYPE_BOOLEAN:
			p_length = sizeof(bool);
			break;
		default:
			errno = EINVAL;
			buxton_log("Invalid parameter type %lu\n", param->type);
			goto fail;
		};

		buxton_debug("offset: %lu\n", offset);
		buxton_debug("value length: %lu\n", p_length);

		/* Need to allocate enough room to hold this data */
		size += sizeof(uint16_t) + sizeof(uint32_t) + p_length;

		if (curSize < size) {
			if (!(data = greedy_realloc((void**)&data, &curSize, size))) {
				errno = ENOMEM;
				goto fail;
			}
			memzero(data+offset, size - offset);
		}

		/* Copy data type */
		memcpy(data+offset, &(param->type), sizeof(uint16_t));
		offset += sizeof(uint16_t);

		/* Write out the length of value */
		memcpy(data+offset, &p_length, sizeof(uint32_t));
		offset += sizeof(uint32_t);

		switch (param->type) {
		case BUXTON_TYPE_STRING:
			memcpy(data+offset, param->store.d_string.value, p_length);
			break;
		case BUXTON_TYPE_INT32:
			memcpy(data+offset, &(param->store.d_int32), sizeof(int32_t));
			break;
		case BUXTON_TYPE_UINT32:
			memcpy(data+offset, &(param->store.d_uint32), sizeof(uint32_t));
			break;
		case BUXTON_TYPE_INT64:
			memcpy(data+offset, &(param->store.d_int64), sizeof(int64_t));
			break;
		case BUXTON_TYPE_UINT64:
			memcpy(data+offset, &(param->store.d_uint64), sizeof(uint64_t));
			break;
		case BUXTON_TYPE_FLOAT:
			memcpy(data+offset, &(param->store.d_float), sizeof(float));
			break;
		case BUXTON_TYPE_DOUBLE:
			memcpy(data+offset, &(param->store.d_double), sizeof(double));
			break;
		case BUXTON_TYPE_BOOLEAN:
			memcpy(data+offset, &(param->store.d_boolean), sizeof(bool));
			break;
		default:
			/* already tested this above, can't get here
			 * normally */
			assert(0);
		};
		offset += p_length;
		p_length = 0;
	}

	memcpy(data+BUXTON_LENGTH_OFFSET, &offset, sizeof(uint32_t));

	ret = offset;
	*dest = data;

fail:
	/* Clean up */
	if (ret == 0) {
		free(data);
	}
end:
	buxton_debug("Serializing returned:%lu\n", ret);
	return ret;
}