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);
234 for (i = 0; i < sysinfo->n_blockdevs; i++) {
235 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
236 len += 4 + optional_strlen(bd_info->name) +
237 4 + optional_strlen(bd_info->uuid) +
238 4 + optional_strlen(bd_info->mountpoint);
244 static int pb_protocol_interface_config_len(struct interface_config *conf)
248 len = sizeof(conf->hwaddr) +
249 4 /* conf->ignore */;
254 len += 4 /* conf->method */;
256 if (conf->method == CONFIG_METHOD_STATIC) {
257 len += 4 + optional_strlen(conf->static_config.address);
258 len += 4 + optional_strlen(conf->static_config.gateway);
264 int pb_protocol_config_len(const struct config *config)
268 len = 4 /* config->autoboot_enabled */ +
269 4 /* config->autoboot_timeout_sec */;
272 for (i = 0; i < config->network.n_interfaces; i++)
273 len += pb_protocol_interface_config_len(
274 config->network.interfaces[i]);
277 for (i = 0; i < config->network.n_dns_servers; i++)
278 len += 4 + optional_strlen(config->network.dns_servers[i]);
281 len += config->n_boot_priorities * 4;
286 int pb_protocol_serialise_device(const struct device *dev,
287 char *buf, int buf_len)
291 pos += pb_protocol_serialise_string(pos, dev->id);
292 *(enum device_type *)pos = dev->type;
293 pos += sizeof(enum device_type);
294 pos += pb_protocol_serialise_string(pos, dev->name);
295 pos += pb_protocol_serialise_string(pos, dev->description);
296 pos += pb_protocol_serialise_string(pos, dev->icon_file);
298 assert(pos <= buf + buf_len);
304 int pb_protocol_serialise_boot_option(const struct boot_option *opt,
305 char *buf, int buf_len)
309 pos += pb_protocol_serialise_string(pos, opt->device_id);
310 pos += pb_protocol_serialise_string(pos, opt->id);
311 pos += pb_protocol_serialise_string(pos, opt->name);
312 pos += pb_protocol_serialise_string(pos, opt->description);
313 pos += pb_protocol_serialise_string(pos, opt->icon_file);
314 pos += pb_protocol_serialise_string(pos, opt->boot_image_file);
315 pos += pb_protocol_serialise_string(pos, opt->initrd_file);
316 pos += pb_protocol_serialise_string(pos, opt->dtb_file);
317 pos += pb_protocol_serialise_string(pos, opt->boot_args);
319 *(bool *)pos = opt->is_default;
322 assert(pos <= buf + buf_len);
328 int pb_protocol_serialise_boot_command(const struct boot_command *boot,
329 char *buf, int buf_len)
333 pos += pb_protocol_serialise_string(pos, boot->option_id);
334 pos += pb_protocol_serialise_string(pos, boot->boot_image_file);
335 pos += pb_protocol_serialise_string(pos, boot->initrd_file);
336 pos += pb_protocol_serialise_string(pos, boot->dtb_file);
337 pos += pb_protocol_serialise_string(pos, boot->boot_args);
339 assert(pos <= buf + buf_len);
345 int pb_protocol_serialise_boot_status(const struct boot_status *status,
346 char *buf, int buf_len)
350 *(uint32_t *)pos = __cpu_to_be32(status->type);
351 pos += sizeof(uint32_t);
353 pos += pb_protocol_serialise_string(pos, status->message);
354 pos += pb_protocol_serialise_string(pos, status->detail);
356 *(uint32_t *)pos = __cpu_to_be32(status->type);
357 pos += sizeof(uint32_t);
359 assert(pos <= buf + buf_len);
365 int pb_protocol_serialise_system_info(const struct system_info *sysinfo,
366 char *buf, int buf_len)
371 pos += pb_protocol_serialise_string(pos, sysinfo->type);
372 pos += pb_protocol_serialise_string(pos, sysinfo->identifier);
374 *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_interfaces);
375 pos += sizeof(uint32_t);
377 for (i = 0; i < sysinfo->n_interfaces; i++) {
378 struct interface_info *if_info = sysinfo->interfaces[i];
380 *(uint32_t *)pos = __cpu_to_be32(if_info->hwaddr_size);
381 pos += sizeof(uint32_t);
383 memcpy(pos, if_info->hwaddr, if_info->hwaddr_size);
384 pos += if_info->hwaddr_size;
386 pos += pb_protocol_serialise_string(pos, if_info->name);
389 *(uint32_t *)pos = __cpu_to_be32(sysinfo->n_blockdevs);
390 pos += sizeof(uint32_t);
392 for (i = 0; i < sysinfo->n_blockdevs; i++) {
393 struct blockdev_info *bd_info = sysinfo->blockdevs[i];
395 pos += pb_protocol_serialise_string(pos, bd_info->name);
396 pos += pb_protocol_serialise_string(pos, bd_info->uuid);
397 pos += pb_protocol_serialise_string(pos, bd_info->mountpoint);
400 assert(pos <= buf + buf_len);
406 static int pb_protocol_serialise_config_interface(char *buf,
407 struct interface_config *conf)
411 memcpy(pos, conf->hwaddr, sizeof(conf->hwaddr));
412 pos += sizeof(conf->hwaddr);
414 *(uint32_t *)pos = conf->ignore;
420 *(uint32_t *)pos = __cpu_to_be32(conf->method);
423 if (conf->method == CONFIG_METHOD_STATIC) {
424 pos += pb_protocol_serialise_string(pos,
425 conf->static_config.address);
426 pos += pb_protocol_serialise_string(pos,
427 conf->static_config.gateway);
433 int pb_protocol_serialise_config(const struct config *config,
434 char *buf, int buf_len)
439 *(uint32_t *)pos = config->autoboot_enabled;
442 *(uint32_t *)pos = __cpu_to_be32(config->autoboot_timeout_sec);
445 *(uint32_t *)pos = __cpu_to_be32(config->network.n_interfaces);
447 for (i = 0; i < config->network.n_interfaces; i++) {
448 struct interface_config *iface =
449 config->network.interfaces[i];
450 pos += pb_protocol_serialise_config_interface(pos, iface);
453 *(uint32_t *)pos = __cpu_to_be32(config->network.n_dns_servers);
455 for (i = 0; i < config->network.n_dns_servers; i++) {
456 pos += pb_protocol_serialise_string(pos,
457 config->network.dns_servers[i]);
460 *(uint32_t *)pos = __cpu_to_be32(config->n_boot_priorities);
462 for (i = 0; i < config->n_boot_priorities; i++) {
463 *(uint32_t *)pos = __cpu_to_be32(config->boot_priorities[i].type);
467 assert(pos <= buf + buf_len);
473 int pb_protocol_write_message(int fd, struct pb_protocol_message *message)
478 total_len = sizeof(*message) + message->payload_len;
480 message->payload_len = __cpu_to_be32(message->payload_len);
481 message->action = __cpu_to_be32(message->action);
483 for (pos = (void *)message; total_len;) {
484 rc = write(fd, pos, total_len);
493 talloc_free(message);
498 pb_log("%s: failed: %s\n", __func__, strerror(errno));
502 struct pb_protocol_message *pb_protocol_create_message(void *ctx,
503 enum pb_protocol_action action, int payload_len)
505 struct pb_protocol_message *message;
507 if (payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
508 pb_log("%s: payload too big %u/%u\n", __func__, payload_len,
509 PB_PROTOCOL_MAX_PAYLOAD_SIZE);
513 message = talloc_size(ctx, sizeof(*message) + payload_len);
515 /* we convert these to big-endian in write_message() */
516 message->action = action;
517 message->payload_len = payload_len;
523 struct pb_protocol_message *pb_protocol_read_message(void *ctx, int fd)
525 struct pb_protocol_message *message, m;
529 /* use the stack for the initial 8-byte read */
531 rc = read(fd, &m, sizeof(m));
535 m.payload_len = __be32_to_cpu(m.payload_len);
536 m.action = __be32_to_cpu(m.action);
538 if (m.payload_len > PB_PROTOCOL_MAX_PAYLOAD_SIZE) {
539 pb_log("%s: payload too big %u/%u\n", __func__, m.payload_len,
540 PB_PROTOCOL_MAX_PAYLOAD_SIZE);
544 message = talloc_size(ctx, sizeof(m) + m.payload_len);
545 memcpy(message, &m, sizeof(m));
547 for (len = 0; len < m.payload_len;) {
548 rc = read(fd, message->payload + len, m.payload_len - len);
551 talloc_free(message);
552 pb_log("%s: failed (%u): %s\n", __func__, len,
564 int pb_protocol_deserialise_device(struct device *dev,
565 const struct pb_protocol_message *message)
571 len = message->payload_len;
572 pos = message->payload;
574 if (read_string(dev, &pos, &len, &dev->id))
577 if (len < sizeof(enum device_type))
579 dev->type = *(enum device_type *)(pos);
580 pos += sizeof(enum device_type);
581 len -= sizeof(enum device_type);
583 if (read_string(dev, &pos, &len, &dev->name))
586 if (read_string(dev, &pos, &len, &dev->description))
589 if (read_string(dev, &pos, &len, &dev->icon_file))
598 int pb_protocol_deserialise_boot_option(struct boot_option *opt,
599 const struct pb_protocol_message *message)
605 len = message->payload_len;
606 pos = message->payload;
608 if (read_string(opt, &pos, &len, &opt->device_id))
611 if (read_string(opt, &pos, &len, &opt->id))
614 if (read_string(opt, &pos, &len, &opt->name))
617 if (read_string(opt, &pos, &len, &opt->description))
620 if (read_string(opt, &pos, &len, &opt->icon_file))
623 if (read_string(opt, &pos, &len, &opt->boot_image_file))
626 if (read_string(opt, &pos, &len, &opt->initrd_file))
629 if (read_string(opt, &pos, &len, &opt->dtb_file))
632 if (read_string(opt, &pos, &len, &opt->boot_args))
635 if (len < sizeof(bool))
637 opt->is_default = *(bool *)(pos);
645 int pb_protocol_deserialise_boot_command(struct boot_command *cmd,
646 const struct pb_protocol_message *message)
652 len = message->payload_len;
653 pos = message->payload;
655 if (read_string(cmd, &pos, &len, &cmd->option_id))
658 if (read_string(cmd, &pos, &len, &cmd->boot_image_file))
661 if (read_string(cmd, &pos, &len, &cmd->initrd_file))
664 if (read_string(cmd, &pos, &len, &cmd->dtb_file))
667 if (read_string(cmd, &pos, &len, &cmd->boot_args))
676 int pb_protocol_deserialise_boot_status(struct boot_status *status,
677 const struct pb_protocol_message *message)
683 len = message->payload_len;
684 pos = message->payload;
686 /* first up, the type enum... */
687 if (len < sizeof(uint32_t))
690 status->type = __be32_to_cpu(*(uint32_t *)(pos));
692 switch (status->type) {
693 case BOOT_STATUS_ERROR:
694 case BOOT_STATUS_INFO:
700 pos += sizeof(uint32_t);
701 len -= sizeof(uint32_t);
703 /* message and detail strings */
704 if (read_string(status, &pos, &len, &status->message))
707 if (read_string(status, &pos, &len, &status->detail))
710 /* and finally, progress */
711 if (len < sizeof(uint32_t))
714 status->progress = __be32_to_cpu(*(uint32_t *)(pos));
717 if (status->progress > 100)
718 status->progress = 100;
726 int pb_protocol_deserialise_system_info(struct system_info *sysinfo,
727 const struct pb_protocol_message *message)
733 len = message->payload_len;
734 pos = message->payload;
736 /* type and identifier strings */
737 if (read_string(sysinfo, &pos, &len, &sysinfo->type))
740 if (read_string(sysinfo, &pos, &len, &sysinfo->identifier))
743 /* number of interfaces */
744 if (read_u32(&pos, &len, &sysinfo->n_interfaces))
747 sysinfo->interfaces = talloc_array(sysinfo, struct interface_info *,
748 sysinfo->n_interfaces);
750 for (i = 0; i < sysinfo->n_interfaces; i++) {
751 struct interface_info *if_info = talloc(sysinfo,
752 struct interface_info);
754 if (read_u32(&pos, &len, &if_info->hwaddr_size))
757 if (len < if_info->hwaddr_size)
760 if_info->hwaddr = talloc_memdup(if_info, pos,
761 if_info->hwaddr_size);
762 pos += if_info->hwaddr_size;
763 len -= if_info->hwaddr_size;
765 if (read_string(if_info, &pos, &len, &if_info->name))
768 sysinfo->interfaces[i] = if_info;
771 /* number of interfaces */
772 if (read_u32(&pos, &len, &sysinfo->n_blockdevs))
775 sysinfo->blockdevs = talloc_array(sysinfo, struct blockdev_info *,
776 sysinfo->n_blockdevs);
778 for (i = 0; i < sysinfo->n_blockdevs; i++) {
779 struct blockdev_info *bd_info = talloc(sysinfo,
780 struct blockdev_info);
782 if (read_string(bd_info, &pos, &len, &bd_info->name))
785 if (read_string(bd_info, &pos, &len, &bd_info->uuid))
788 if (read_string(bd_info, &pos, &len, &bd_info->mountpoint))
791 sysinfo->blockdevs[i] = bd_info;
799 static int pb_protocol_deserialise_config_interface(const char **buf,
800 unsigned int *len, struct interface_config *iface)
804 if (*len < sizeof(iface->hwaddr))
807 memcpy(iface->hwaddr, *buf, sizeof(iface->hwaddr));
808 *buf += sizeof(iface->hwaddr);
809 *len -= sizeof(iface->hwaddr);
811 if (read_u32(buf, len, &tmp))
813 iface->ignore = !!tmp;
818 if (read_u32(buf, len, &iface->method))
821 if (iface->method == CONFIG_METHOD_STATIC) {
822 if (read_string(iface, buf, len, &iface->static_config.address))
825 if (read_string(iface, buf, len, &iface->static_config.gateway))
832 int pb_protocol_deserialise_config(struct config *config,
833 const struct pb_protocol_message *message)
835 unsigned int len, i, tmp;
839 len = message->payload_len;
840 pos = message->payload;
842 if (read_u32(&pos, &len, &tmp))
844 config->autoboot_enabled = !!tmp;
846 if (read_u32(&pos, &len, &config->autoboot_timeout_sec))
849 if (read_u32(&pos, &len, &config->network.n_interfaces))
852 config->network.interfaces = talloc_array(config,
853 struct interface_config *, config->network.n_interfaces);
855 for (i = 0; i < config->network.n_interfaces; i++) {
856 struct interface_config *iface = talloc_zero(
857 config->network.interfaces,
858 struct interface_config);
859 if (pb_protocol_deserialise_config_interface(&pos, &len, iface))
861 config->network.interfaces[i] = iface;
864 if (read_u32(&pos, &len, &config->network.n_dns_servers))
866 config->network.dns_servers = talloc_array(config, const char *,
867 config->network.n_dns_servers);
869 for (i = 0; i < config->network.n_dns_servers; i++) {
871 if (read_string(config->network.dns_servers, &pos, &len, &tmp))
873 config->network.dns_servers[i] = tmp;
876 if (read_u32(&pos, &len, &config->n_boot_priorities))
878 config->boot_priorities = talloc_array(config, struct boot_priority,
879 config->n_boot_priorities);
881 for (i = 0; i < config->n_boot_priorities; i++) {
882 if (read_u32(&pos, &len, &tmp))
884 config->boot_priorities[i].type = tmp;