ofl_err
ofl_structs_bucket_unpack(struct ofp_bucket *src, size_t *len, uint8_t gtype, struct ofl_bucket **dst, struct ofl_exp *exp, char *errbuf) {
struct ofl_bucket *b;
struct ofp_action_header *act;
size_t blen;
ofl_err error;
size_t i;
if (*len < sizeof(struct ofp_bucket)) {
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received bucket is too short (%zu).", *len);
}
return ofl_error(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
}
if (*len < ntohs(src->len)) {
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received bucket has invalid length (set to %u, but only %zu received).", ntohs(src->len), *len);
}
return ofl_error(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
}
blen = ntohs(src->len) - sizeof(struct ofp_bucket);
if (gtype == OFPGT_SELECT && ntohs(src->weight) == 0) {
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received bucket has no weight for SELECT group.");
}
return ofl_error(OFPET_GROUP_MOD_FAILED, OFPGMFC_INVALID_GROUP);
}
if (gtype != OFPGT_SELECT && ntohs(src->weight) > 0) {
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received bucket has weight for non-SELECT group.");
}
return ofl_error(OFPET_GROUP_MOD_FAILED, OFPGMFC_INVALID_GROUP);
}
b = (struct ofl_bucket *)malloc(sizeof(struct ofl_bucket));
b->weight = ntohs(src->weight);
b->watch_port = ntohl(src->watch_port);
b->watch_group = ntohl(src->watch_group);
error = ofl_utils_count_ofp_actions((uint8_t *)src->actions, blen, &b->actions_num, errbuf);
if (error) {
free(b);
return error;
}
b->actions = (struct ofl_action_header **)malloc(b->actions_num * sizeof(struct ofl_action_header *));
act = src->actions;
for (i = 0; i < b->actions_num; i++) {
error = ofl_actions_unpack(act, &blen, &(b->actions[i]), exp, errbuf);
if (error) {
*len = *len - ntohs(src->len) + blen;
OFL_UTILS_FREE_ARR_FUN3(b->actions, i,
ofl_actions_free, exp, errbuf);
//TODO error
free(b);
return error;
}
act = (struct ofp_action_header *)((uint8_t *)act + ntohs(act->len));
}
if (blen >= 8) {
*len = *len - ntohs(src->len) + blen;
ofl_structs_free_bucket(b, exp, errbuf);
//TODO error
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received bucket has more than 64 bit padding (%zu).", blen);
}
return ofl_error(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
}
*len -= ntohs(src->len);
*dst = b;
return 0;
}
ofl_err
ofl_structs_instructions_unpack(struct ofp_instruction *src, size_t *len, struct ofl_instruction_header **dst, struct ofl_exp *exp) {
size_t ilen;
struct ofl_instruction_header *inst = NULL;
if (*len < sizeof(struct ofp_instruction)) {
OFL_LOG_WARN(LOG_MODULE, "Received instruction is too short (%zu).", *len);
return ofl_error(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
}
if (*len < ntohs(src->len)) {
OFL_LOG_WARN(LOG_MODULE, "Received instruction has invalid length (set to %u, but only %zu received).", ntohs(src->len), *len);
return ofl_error(OFPET_BAD_ACTION, OFPBAC_BAD_LEN);
}
ilen = ntohs(src->len);
switch (ntohs(src->type)) {
case OFPIT_GOTO_TABLE: {
struct ofp_instruction_goto_table *si;
struct ofl_instruction_goto_table *di;
if (ilen < sizeof(struct ofp_instruction_goto_table)) {
OFL_LOG_WARN(LOG_MODULE, "Received GOTO_TABLE instruction has invalid length (%zu).", *len);
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
si = (struct ofp_instruction_goto_table *)src;
if (si->table_id >= PIPELINE_TABLES) {
if (OFL_LOG_IS_WARN_ENABLED(LOG_MODULE)) {
char *ts = ofl_table_to_string(si->table_id);
OFL_LOG_WARN(LOG_MODULE, "Received GOTO_TABLE instruction has invalid table_id (%s).", ts);
free(ts);
}
return ofl_error(OFPET_BAD_INSTRUCTION, OFPBIC_BAD_TABLE_ID);
}
di = (struct ofl_instruction_goto_table *)malloc(sizeof(struct ofl_instruction_goto_table));
di->table_id = si->table_id;
inst = (struct ofl_instruction_header *)di;
ilen -= sizeof(struct ofp_instruction_goto_table);
break;
}
case OFPIT_WRITE_METADATA: {
struct ofp_instruction_write_metadata *si;
struct ofl_instruction_write_metadata *di;
if (ilen < sizeof(struct ofp_instruction_write_metadata)) {
OFL_LOG_WARN(LOG_MODULE, "Received WRITE_METADATA instruction has invalid length (%zu).", *len);
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
si = (struct ofp_instruction_write_metadata *)src;
di = (struct ofl_instruction_write_metadata *)malloc(sizeof(struct ofl_instruction_write_metadata));
di->metadata = ntoh64(si->metadata);
di->metadata_mask = ntoh64(si->metadata_mask);
inst = (struct ofl_instruction_header *)di;
ilen -= sizeof(struct ofp_instruction_write_metadata);
break;
}
case OFPIT_WRITE_ACTIONS:
case OFPIT_APPLY_ACTIONS: {
struct ofp_instruction_actions *si;
struct ofl_instruction_actions *di;
struct ofp_action_header *act;
ofl_err error;
size_t i;
if (ilen < sizeof(struct ofp_instruction_actions)) {
OFL_LOG_WARN(LOG_MODULE, "Received *_ACTIONS instruction has invalid length (%zu).", *len);
return ofl_error(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
}
ilen -= sizeof(struct ofp_instruction_actions);
si = (struct ofp_instruction_actions *)src;
di = (struct ofl_instruction_actions *)malloc(sizeof(struct ofl_instruction_actions));
error = ofl_utils_count_ofp_actions((uint8_t *)si->actions, ilen, &di->actions_num);
if (error) {
free(di);
return error;
}
di->actions = (struct ofl_action_header **)malloc(di->actions_num * sizeof(struct ofl_action_header *));
act = si->actions;
for (i = 0; i < di->actions_num; i++) {
error = ofl_actions_unpack(act, &ilen, &(di->actions[i]), exp);
if (error) {
*len = *len - ntohs(src->len) + ilen;
OFL_UTILS_FREE_ARR_FUN2(di->actions, i,
ofl_actions_free, exp);
free(di);
return error;
}
act = (struct ofp_action_header *)((uint8_t *)act + ntohs(act->len));
}
inst = (struct ofl_instruction_header *)di;
break;
}
case OFPIT_CLEAR_ACTIONS: {
if (ilen < sizeof(struct ofp_instruction_actions)) {
OFL_LOG_WARN(LOG_MODULE, "Received CLEAR_ACTIONS instruction has invalid length (%zu).", *len);
return ofl_error(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
}
inst = (struct ofl_instruction_header *)malloc(sizeof(struct ofl_instruction_header));
inst->type = (enum ofp_instruction_type)ntohs(src->type);
ilen -= sizeof(struct ofp_instruction_actions);
break;
}
case OFPIT_METER: {
struct ofp_instruction_meter *si;
struct ofl_instruction_meter *di;
if (ilen < sizeof(struct ofp_instruction_meter)) {
OFL_LOG_WARN(LOG_MODULE, "Received METER instruction has invalid length (%zu).", *len);
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
si = (struct ofp_instruction_meter*)src;
di = (struct ofl_instruction_meter *)malloc(sizeof(struct ofl_instruction_meter));
di->meter_id = ntohl(si->meter_id);
inst = (struct ofl_instruction_header *)di;
ilen -= sizeof(struct ofp_instruction_meter);
break;
}
case OFPIT_EXPERIMENTER: {
ofl_err error;
if (exp == NULL || exp->inst == NULL || exp->inst->unpack == NULL) {
OFL_LOG_WARN(LOG_MODULE, "Received EXPERIMENTER instruction, but no callback was given.");
return ofl_error(OFPET_BAD_INSTRUCTION, OFPBIC_UNSUP_INST);
}
error = exp->inst->unpack(src, &ilen, &inst);
if (error) {
return error;
}
break;
}
default:
OFL_LOG_WARN(LOG_MODULE, "The received instruction type (%u) is invalid.", ntohs(src->type));
return ofl_error(OFPET_BAD_INSTRUCTION, OFPBIC_UNKNOWN_INST);
}
// must set type before check, so free works correctly
inst->type = (enum ofp_instruction_type)ntohs(src->type);
if (ilen != 0) {
*len = *len - ntohs(src->len) + ilen;
OFL_LOG_WARN(LOG_MODULE, "The received instruction contained extra bytes (%zu).", ilen);
ofl_structs_free_instruction(inst, exp);
return ofl_error(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
}
*len -= ntohs(src->len);
(*dst) = inst;
return 0;
}
static ofl_err
ofl_msg_unpack_packet_out(struct ofp_header *src, size_t *len, struct ofl_msg_header **msg, struct ofl_exp *exp, char *errbuf) {
struct ofp_packet_out *sp;
struct ofl_msg_packet_out *dp;
struct ofp_action_header *act;
uint8_t *data;
ofl_err error;
size_t i, actions_num;
if (*len < sizeof(struct ofp_packet_out)) {
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received PACKET_OUT message has invalid length (%zu).", *len);
}
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
sp = (struct ofp_packet_out *)src;
if (ntohl(sp->in_port) == 0 ||
(ntohl(sp->in_port) > OFPP_MAX && ntohl(sp->in_port) != OFPP_CONTROLLER)) {
if (errbuf != NULL) {
char *ps = ofl_port_to_string(ntohl(sp->in_port));
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received PACKET_OUT message with invalid in_port (%s).", ps);
free(ps);
}
return ofl_error(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
}
if (ntohl(sp->buffer_id) != 0xffffffff &&
*len != sizeof(struct ofp_packet_out) + ntohs(sp->actions_len)) {
if (errbuf != NULL) {
char *bs = ofl_buffer_to_string(ntohl(sp->buffer_id));
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received PACKET_OUT message with data and buffer_id (%s).", bs);
free(bs);
}
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
*len -= sizeof(struct ofp_packet_out);
dp = (struct ofl_msg_packet_out *)malloc(sizeof(struct ofl_msg_packet_out));
dp->buffer_id = ntohl(sp->buffer_id);
dp->in_port = ntohl(sp->in_port);
if (*len < ntohs(sp->actions_len)) {
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received PACKET_OUT message has invalid action length (%zu).", *len);
}
free(dp);
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
error = ofl_utils_count_ofp_actions(&(sp->actions), ntohs(sp->actions_len), &actions_num, errbuf);
if (error) {
free(dp);
return error;
}
dp->actions_num = actions_num;
dp->actions = (struct ofl_action_header **)malloc(dp->actions_num * sizeof(struct ofp_action_header *));
// TODO Zoltan: Output actions can contain OFPP_TABLE
act = sp->actions;
for (i = 0; i < dp->actions_num; i++) {
error = ofl_actions_unpack(act, len, &(dp->actions[i]), exp, errbuf);
if (error) {
OFL_UTILS_FREE_ARR_FUN3(dp->actions, i,
ofl_actions_free, exp, errbuf);
free(dp);
}
act = (struct ofp_action_header *)((uint8_t *)act + ntohs(act->len));
}
data = ((uint8_t *)sp->actions) + ntohs(sp->actions_len);
dp->data_length = *len;
dp->data = *len > 0 ? (uint8_t *)memcpy(malloc(*len), data, *len) : NULL;
*len = 0;
*msg = (struct ofl_msg_header *)dp;
return 0;
}