7 #include <asm/byteorder.h>
9 #include <talloc/talloc.h>
10 #include <list/list.h>
13 #include "pb-protocol.h"
18 * 4-byte action, determines the remaining message content
19 * 4-byte total payload len
20 * - not including action and payload len header
22 * action = 0x1: device add message
27 * 4-byte len, description
28 * 4-byte len, icon_file
34 * 4-byte len, description
35 * 4-byte len, icon_file
36 * 4-byte len, boot_image_file
37 * 4-byte len, initrd_file
38 * 4-byte len, dtb_file
39 * 4-byte len, boot_args
41 * action = 0x2: device remove message
47 * 4-byte len, boot option id
48 * 4-byte len, boot_image_file
49 * 4-byte len, initrd_file
50 * 4-byte len, dtb_file
51 * 4-byte len, boot_args
55 void pb_protocol_dump_device(const struct device *dev, const char *text,
58 struct boot_option *opt;
60 fprintf(stream, "%snew dev:\n", text);
61 fprintf(stream, "%s\tid: %s\n", text, dev->id);
62 fprintf(stream, "%s\tname: %s\n", text, dev->name);
63 fprintf(stream, "%s\tdesc: %s\n", text, dev->description);
64 fprintf(stream, "%s\ticon: %s\n", text, dev->icon_file);
65 fprintf(stream, "%s\tboot options:\n", text);
66 list_for_each_entry(&dev->boot_options, opt, list) {
67 fprintf(stream, "%s\t\tid: %s\n", text, opt->id);
68 fprintf(stream, "%s\t\tname: %s\n", text, opt->name);
69 fprintf(stream, "%s\t\tdesc: %s\n", text, opt->description);
70 fprintf(stream, "%s\t\ticon: %s\n", text, opt->icon_file);
71 fprintf(stream, "%s\t\tboot: %s\n", text, opt->boot_image_file);
72 fprintf(stream, "%s\t\tinit: %s\n", text, opt->initrd_file);
73 fprintf(stream, "%s\t\tdtb: %s\n", text, opt->dtb_file);
74 fprintf(stream, "%s\t\targs: %s\n", text, opt->boot_args);
78 int pb_protocol_device_cmp(const struct device *a, const struct device *b)
80 return !strcmp(a->id, b->id);
83 int pb_protocol_boot_option_cmp(const struct boot_option *a,
84 const struct boot_option *b)
86 return !strcmp(a->id, b->id);
89 /* Write a string into the buffer, starting at pos.
91 * Returns the total length used for the write, including length header.
93 int pb_protocol_serialise_string(char *pos, const char *str)
100 *(uint32_t *)pos = __cpu_to_be32(len);
101 pos += sizeof(uint32_t);
103 memcpy(pos, str, len);
105 return len + sizeof(uint32_t);
108 /* Read a string from a buffer, allocating the new string as necessary.
110 * @param[in] ctx The talloc context to base the allocation on
111 * @param[in,out] pos Where to start reading
112 * @param[in,out] len The amount of data remaining in the buffer
113 * @param[out] str Pointer to resuling string
114 * @return zero on success, non-zero on failure
116 static int read_string(void *ctx, const char **pos, unsigned int *len,
119 uint32_t str_len, read_len;
121 if (*len < sizeof(uint32_t))
124 str_len = __be32_to_cpu(*(uint32_t *)(*pos));
125 read_len = sizeof(uint32_t);
127 if (read_len + str_len > *len)
133 *str = talloc_strndup(ctx, *pos + read_len, str_len);
137 /* all ok, update the caller's pointers */
144 static int read_u32(const char **pos, unsigned int *len, unsigned int *p)
146 if (*len < sizeof(uint32_t))
149 *p = (unsigned int)__be32_to_cpu(*(uint32_t *)(*pos));
150 *pos += sizeof(uint32_t);
151 *len -= sizeof(uint32_t);
156 char *pb_protocol_deserialise_string(void *ctx,
157 const struct pb_protocol_message *message)
163 len = message->payload_len;
164 buf = message->payload;
166 if (read_string(ctx, &buf, &len, &str))
172 static int optional_strlen(const char *str)
179 int pb_protocol_device_len(const struct device *dev)
181 return 4 + optional_strlen(dev->id) +
183 4 + optional_strlen(dev->name) +
184 4 + optional_strlen(dev->description) +
185 4 + optional_strlen(dev->icon_file);
188 int pb_protocol_boot_option_len(const struct boot_option *opt)
191 return 4 + optional_strlen(opt->device_id) +
192 4 + optional_strlen(opt->id) +
193 4 + optional_strlen(opt->name) +
194 4 + optional_strlen(opt->description) +
195 4 + optional_strlen(opt->icon_file) +
196 4 + optional_strlen(opt->boot_image_file) +
197 4 + optional_strlen(opt->initrd_file) +
198 4 + optional_strlen(opt->dtb_file) +
199 4 + optional_strlen(opt->boot_args) +
200 sizeof(opt->is_default);
203 int pb_protocol_boot_len(const struct boot_command *boot)
205 return 4 + optional_strlen(boot->option_id) +
206 4 + optional_strlen(boot->boot_image_file) +
207 4 + optional_strlen(boot->initrd_file) +
208 4 + optional_strlen(boot->dtb_file) +
209 4 + optional_strlen(boot->boot_args);
212 int pb_protocol_boot_status_len(const struct boot_status *status)
215 4 + optional_strlen(status->message) +
216 4 + optional_strlen(status->detail) +
220 int pb_protocol_system_info_len(const struct system_info *sysinfo)
224 len = 4 + optional_strlen(sysinfo->type) +
225 4 + optional_strlen(sysinfo->identifier) +
228 for (i = 0; i < sysinfo->n_interfaces; i++) {
229 struct interface_info *if_info = sysinfo->interfaces[i];
230 len += 4 + if_info->hwaddr_size +
231 4 + optional_strlen(if_info->name) +
232 sizeof(if_info->link);
235 for (i = 0; i < sysinfo->n_blockdevs; i++) {
236 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
237 len += 4 + optional_strlen(bd_info->name) +
238 4 + optional_strlen(bd_info->uuid) +
239 4 + optional_strlen(bd_info->mountpoint);
245 static int pb_protocol_interface_config_len(struct interface_config *conf)
249 len = sizeof(conf->hwaddr) +
250 4 /* conf->ignore */;
255 len += 4 /* conf->method */;
257 if (conf->method == CONFIG_METHOD_STATIC) {
258 len += 4 + optional_strlen(conf->static_config.address);
259 len += 4 + optional_strlen(conf->static_config.gateway);
265 int pb_protocol_config_len(const struct config *config)
269 len = 4 /* config->autoboot_enabled */ +
270 4 /* config->autoboot_timeout_sec */ +
271 4 /* config->safe_mode */;
274 for (i = 0; i < config->network.n_interfaces; i++)
275 len += pb_protocol_interface_config_len(
276 config->network.interfaces[i]);
279 for (i = 0; i < config->network.n_dns_servers; i++)
280 len += 4 + optional_strlen(config->network.dns_servers[i]);
283 len += config->n_boot_priorities * 8;
285 len += 4 + optional_strlen(config->boot_device);
287 len += 4 + optional_strlen(config->lang);
292 int pb_protocol_url_len(const char *url)
294 /* url + length field */
295 return 4 + optional_strlen(url);
298 int pb_protocol_serialise_device(const struct device *dev,
299 char *buf, int buf_len)
303 pos += pb_protocol_serialise_string(pos, dev->id);
304 *(enum device_type *)pos = dev->type;
305 pos += sizeof(enum device_type);
306 pos += pb_protocol_serialise_string(pos, dev->name);
307 pos += pb_protocol_serialise_string(pos, dev->description);
308 pos += pb_protocol_serialise_string(pos, dev->icon_file);
310 assert(pos <= buf + buf_len);
316 int pb_protocol_serialise_boot_option(const struct boot_option *opt,
317 char *buf, int buf_len)
321 pos += pb_protocol_serialise_string(pos, opt->device_id);
322 pos += pb_protocol_serialise_string(pos, opt->id);
323 pos += pb_protocol_serialise_string(pos, opt->name);
324 pos += pb_protocol_serialise_string(pos, opt->description);
325 pos += pb_protocol_serialise_string(pos, opt->icon_file);
326 pos += pb_protocol_serialise_string(pos, opt->boot_image_file);
327 pos += pb_protocol_serialise_string(pos, opt->initrd_file);
328 pos += pb_protocol_serialise_string(pos, opt->dtb_file);
329 pos += pb_protocol_serialise_string(pos, opt->boot_args);
331 *(bool *)pos = opt->is_default;
334 assert(pos <= buf + buf_len);
340 int pb_protocol_serialise_boot_command(const struct boot_command *boot,
341 char *buf, int buf_len)
345 pos += pb_protocol_serialise_string(pos, boot->option_id);
346 pos += pb_protocol_serialise_string(pos, boot->boot_image_file);
347 pos += pb_protocol_serialise_string(pos, boot->initrd_file);
348 pos += pb_protocol_serialise_string(pos, boot->dtb_file);
349 pos += pb_protocol_serialise_string(pos, boot->boot_args);
351 assert(pos <= buf + buf_len);
357 int pb_protocol_serialise_boot_status(const struct boot_status *status,
358 char *buf, int buf_len)
362 *(uint32_t *)pos = __cpu_to_be32(status->type);
363 pos += sizeof(uint32_t);
365 pos += pb_protocol_serialise_string(pos, status->message);
366 pos += pb_protocol_serialise_string(pos, status->detail);
368 *(uint32_t *)pos = __cpu_to_be32(status->type);
369 pos += sizeof(uint32_t);
371 assert(pos <= buf + buf_len);
377 int pb_protocol_serialise_system_info(const struct system_info *sysinfo,
378 char *buf, int buf_len)
383 pos += pb_protocol_serialise_string(pos, sysinfo->type);
384 pos += pb_protocol_serialise_string(pos, sysinfo->identifier);
386 *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_interfaces);
387 pos += sizeof(uint32_t);
389 for (i = 0; i < sysinfo->n_interfaces; i++) {
390 struct interface_info *if_info = sysinfo->interfaces[i];
392 *(uint32_t *)pos = __cpu_to_be32(if_info->hwaddr_size);
393 pos += sizeof(uint32_t);
395 memcpy(pos, if_info->hwaddr, if_info->hwaddr_size);
396 pos += if_info->hwaddr_size;
398 pos += pb_protocol_serialise_string(pos, if_info->name);
400 *(bool *)pos = if_info->link;
404 *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_blockdevs);
405 pos += sizeof(uint32_t);
407 for (i = 0; i < sysinfo->n_blockdevs; i++) {
408 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
410 pos += pb_protocol_serialise_string(pos, bd_info->name);
411 pos += pb_protocol_serialise_string(pos, bd_info->uuid);
412 pos += pb_protocol_serialise_string(pos, bd_info->mountpoint);
415 assert(pos <= buf + buf_len);
421 static int pb_protocol_serialise_config_interface(char *buf,
422 struct interface_config *conf)
426 memcpy(pos, conf->hwaddr, sizeof(conf->hwaddr));
427 pos += sizeof(conf->hwaddr);
429 *(uint32_t *)pos = conf->ignore;
435 *(uint32_t *)pos = __cpu_to_be32(conf->method);
438 if (conf->method == CONFIG_METHOD_STATIC) {
439 pos += pb_protocol_serialise_string(pos,
440 conf->static_config.address);
441 pos += pb_protocol_serialise_string(pos,
442 conf->static_config.gateway);
448 int pb_protocol_serialise_config(const struct config *config,
449 char *buf, int buf_len)
454 *(uint32_t *)pos = config->autoboot_enabled;
457 *(uint32_t *)pos = __cpu_to_be32(config->autoboot_timeout_sec);
460 *(uint32_t *)pos = config->safe_mode;
463 *(uint32_t *)pos = __cpu_to_be32(config->network.n_interfaces);
465 for (i = 0; i < config->network.n_interfaces; i++) {
466 struct interface_config *iface =
467 config->network.interfaces[i];
468 pos += pb_protocol_serialise_config_interface(pos, iface);
471 *(uint32_t *)pos = __cpu_to_be32(config->network.n_dns_servers);
473 for (i = 0; i < config->network.n_dns_servers; i++) {
474 pos += pb_protocol_serialise_string(pos,
475 config->network.dns_servers[i]);
478 *(uint32_t *)pos = __cpu_to_be32(config->n_boot_priorities);
480 for (i = 0; i < config->n_boot_priorities; i++) {
482 __cpu_to_be32(config->boot_priorities[i].type);
485 __cpu_to_be32(config->boot_priorities[i].priority);
489 pos += pb_protocol_serialise_string(pos, config->boot_device);
491 pos += pb_protocol_serialise_string(pos, config->lang);
493 assert(pos <= buf + buf_len);
499 int pb_protocol_serialise_url(const char *url, char *buf, int buf_len)
503 pos += pb_protocol_serialise_string(pos, url);
505 assert(pos <=buf+buf_len);
511 int pb_protocol_write_message(int fd, struct pb_protocol_message *message)
516 total_len = sizeof(*message) + message->payload_len;
518 message->payload_len = __cpu_to_be32(message->payload_len);
519 message->action = __cpu_to_be32(message->action);
521 for (pos = (void *)message; total_len;) {
522 rc = write(fd, pos, total_len);
531 talloc_free(message);
536 pb_log("%s: failed: %s\n", __func__, strerror(errno));
540 struct pb_protocol_message *pb_protocol_create_message(void *ctx,
541 enum pb_protocol_action action, int payload_len)
543 struct pb_protocol_message *message;
545 if (payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
546 pb_log("%s: payload too big %u/%u\n", __func__, payload_len,
547 PB_PROTOCOL_MAX_PAYLOAD_SIZE);
551 message = talloc_size(ctx, sizeof(*message) + payload_len);
553 /* we convert these to big-endian in write_message() */
554 message->action = action;
555 message->payload_len = payload_len;
561 struct pb_protocol_message *pb_protocol_read_message(void *ctx, int fd)
563 struct pb_protocol_message *message, m;
567 /* use the stack for the initial 8-byte read */
569 rc = read(fd, &m, sizeof(m));
573 m.payload_len = __be32_to_cpu(m.payload_len);
574 m.action = __be32_to_cpu(m.action);
576 if (m.payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
577 pb_log("%s: payload too big %u/%u\n", __func__, m.payload_len,
578 PB_PROTOCOL_MAX_PAYLOAD_SIZE);
582 message = talloc_size(ctx, sizeof(m) + m.payload_len);
583 memcpy(message, &m, sizeof(m));
585 for (len = 0; len < m.payload_len;) {
586 rc = read(fd, message->payload + len, m.payload_len - len);
589 talloc_free(message);
590 pb_log("%s: failed (%u): %s\n", __func__, len,
602 int pb_protocol_deserialise_device(struct device *dev,
603 const struct pb_protocol_message *message)
609 len = message->payload_len;
610 pos = message->payload;
612 if (read_string(dev, &pos, &len, &dev->id))
615 if (len < sizeof(enum device_type))
617 dev->type = *(enum device_type *)(pos);
618 pos += sizeof(enum device_type);
619 len -= sizeof(enum device_type);
621 if (read_string(dev, &pos, &len, &dev->name))
624 if (read_string(dev, &pos, &len, &dev->description))
627 if (read_string(dev, &pos, &len, &dev->icon_file))
636 int pb_protocol_deserialise_boot_option(struct boot_option *opt,
637 const struct pb_protocol_message *message)
643 len = message->payload_len;
644 pos = message->payload;
646 if (read_string(opt, &pos, &len, &opt->device_id))
649 if (read_string(opt, &pos, &len, &opt->id))
652 if (read_string(opt, &pos, &len, &opt->name))
655 if (read_string(opt, &pos, &len, &opt->description))
658 if (read_string(opt, &pos, &len, &opt->icon_file))
661 if (read_string(opt, &pos, &len, &opt->boot_image_file))
664 if (read_string(opt, &pos, &len, &opt->initrd_file))
667 if (read_string(opt, &pos, &len, &opt->dtb_file))
670 if (read_string(opt, &pos, &len, &opt->boot_args))
673 if (len < sizeof(bool))
675 opt->is_default = *(bool *)(pos);
683 int pb_protocol_deserialise_boot_command(struct boot_command *cmd,
684 const struct pb_protocol_message *message)
690 len = message->payload_len;
691 pos = message->payload;
693 if (read_string(cmd, &pos, &len, &cmd->option_id))
696 if (read_string(cmd, &pos, &len, &cmd->boot_image_file))
699 if (read_string(cmd, &pos, &len, &cmd->initrd_file))
702 if (read_string(cmd, &pos, &len, &cmd->dtb_file))
705 if (read_string(cmd, &pos, &len, &cmd->boot_args))
714 int pb_protocol_deserialise_boot_status(struct boot_status *status,
715 const struct pb_protocol_message *message)
721 len = message->payload_len;
722 pos = message->payload;
724 /* first up, the type enum... */
725 if (len < sizeof(uint32_t))
728 status->type = __be32_to_cpu(*(uint32_t *)(pos));
730 switch (status->type) {
731 case BOOT_STATUS_ERROR:
732 case BOOT_STATUS_INFO:
738 pos += sizeof(uint32_t);
739 len -= sizeof(uint32_t);
741 /* message and detail strings */
742 if (read_string(status, &pos, &len, &status->message))
745 if (read_string(status, &pos, &len, &status->detail))
748 /* and finally, progress */
749 if (len < sizeof(uint32_t))
752 status->progress = __be32_to_cpu(*(uint32_t *)(pos));
755 if (status->progress > 100)
756 status->progress = 100;
764 int pb_protocol_deserialise_system_info(struct system_info *sysinfo,
765 const struct pb_protocol_message *message)
771 len = message->payload_len;
772 pos = message->payload;
774 /* type and identifier strings */
775 if (read_string(sysinfo, &pos, &len, &sysinfo->type))
778 if (read_string(sysinfo, &pos, &len, &sysinfo->identifier))
781 /* number of interfaces */
782 if (read_u32(&pos, &len, &sysinfo->n_interfaces))
785 sysinfo->interfaces = talloc_array(sysinfo, struct interface_info *,
786 sysinfo->n_interfaces);
788 for (i = 0; i < sysinfo->n_interfaces; i++) {
789 struct interface_info *if_info = talloc(sysinfo,
790 struct interface_info);
792 if (read_u32(&pos, &len, &if_info->hwaddr_size))
795 if (len < if_info->hwaddr_size)
798 if_info->hwaddr = talloc_memdup(if_info, pos,
799 if_info->hwaddr_size);
800 pos += if_info->hwaddr_size;
801 len -= if_info->hwaddr_size;
803 if (read_string(if_info, &pos, &len, &if_info->name))
806 if_info->link = *(bool *)pos;
807 pos += sizeof(if_info->link);
809 sysinfo->interfaces[i] = if_info;
812 /* number of interfaces */
813 if (read_u32(&pos, &len, &sysinfo->n_blockdevs))
816 sysinfo->blockdevs = talloc_array(sysinfo, struct blockdev_info *,
817 sysinfo->n_blockdevs);
819 for (i = 0; i < sysinfo->n_blockdevs; i++) {
820 struct blockdev_info *bd_info = talloc(sysinfo,
821 struct blockdev_info);
823 if (read_string(bd_info, &pos, &len, &bd_info->name))
826 if (read_string(bd_info, &pos, &len, &bd_info->uuid))
829 if (read_string(bd_info, &pos, &len, &bd_info->mountpoint))
832 sysinfo->blockdevs[i] = bd_info;
840 static int pb_protocol_deserialise_config_interface(const char **buf,
841 unsigned int *len, struct interface_config *iface)
845 if (*len < sizeof(iface->hwaddr))
848 memcpy(iface->hwaddr, *buf, sizeof(iface->hwaddr));
849 *buf += sizeof(iface->hwaddr);
850 *len -= sizeof(iface->hwaddr);
852 if (read_u32(buf, len, &tmp))
854 iface->ignore = !!tmp;
859 if (read_u32(buf, len, &iface->method))
862 if (iface->method == CONFIG_METHOD_STATIC) {
863 if (read_string(iface, buf, len, &iface->static_config.address))
866 if (read_string(iface, buf, len, &iface->static_config.gateway))
873 int pb_protocol_deserialise_config(struct config *config,
874 const struct pb_protocol_message *message)
876 unsigned int len, i, tmp;
881 len = message->payload_len;
882 pos = message->payload;
884 if (read_u32(&pos, &len, &tmp))
886 config->autoboot_enabled = !!tmp;
888 if (read_u32(&pos, &len, &config->autoboot_timeout_sec))
891 if (read_u32(&pos, &len, &tmp))
893 config->safe_mode = !!tmp;
895 if (read_u32(&pos, &len, &config->network.n_interfaces))
898 config->network.interfaces = talloc_array(config,
899 struct interface_config *, config->network.n_interfaces);
901 for (i = 0; i < config->network.n_interfaces; i++) {
902 struct interface_config *iface = talloc_zero(
903 config->network.interfaces,
904 struct interface_config);
905 if (pb_protocol_deserialise_config_interface(&pos, &len, iface))
907 config->network.interfaces[i] = iface;
910 if (read_u32(&pos, &len, &config->network.n_dns_servers))
912 config->network.dns_servers = talloc_array(config, const char *,
913 config->network.n_dns_servers);
915 for (i = 0; i < config->network.n_dns_servers; i++) {
916 if (read_string(config->network.dns_servers, &pos, &len, &str))
918 config->network.dns_servers[i] = str;
921 if (read_u32(&pos, &len, &config->n_boot_priorities))
923 config->boot_priorities = talloc_array(config, struct boot_priority,
924 config->n_boot_priorities);
926 for (i = 0; i < config->n_boot_priorities; i++) {
927 if (read_u32(&pos, &len, &tmp))
929 config->boot_priorities[i].priority = (int)tmp;
930 if (read_u32(&pos, &len, &tmp))
932 config->boot_priorities[i].type = tmp;
935 if (read_string(config, &pos, &len, &str))
938 config->boot_device = str;
940 if (read_string(config, &pos, &len, &str))