ofl_err
ofl_structs_table_stats_unpack(struct ofp_table_stats *src, size_t *len, struct ofl_table_stats **dst) {
struct ofl_table_stats *p;
if (*len < sizeof(struct ofp_table_stats)) {
OFL_LOG_WARN(LOG_MODULE, "Received table stats has invalid length (%zu).", *len);
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
if (src->table_id == 0xff) {
if (OFL_LOG_IS_WARN_ENABLED(LOG_MODULE)) {
char *ts = ofl_table_to_string(src->table_id);
OFL_LOG_WARN(LOG_MODULE, "Received table stats has invalid table_id (%s).", ts);
free(ts);
}
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
*len -= sizeof(struct ofp_table_stats);
p = (struct ofl_table_stats *)malloc(sizeof(struct ofl_table_stats));
p->table_id = src->table_id;
p->active_count = ntohl(src->active_count);
p->lookup_count = ntoh64(src->lookup_count);
p->matched_count = ntoh64(src->matched_count);
*dst = p;
return 0;
}
static ofl_err
ofl_msg_unpack_flow_removed(struct ofp_header *src, size_t *len, struct ofl_msg_header **msg, struct ofl_exp *exp, char *errbuf) {
struct ofp_flow_removed *sr;
struct ofl_msg_flow_removed *dr;
ofl_err error;
if (*len < (sizeof(struct ofp_flow_removed) - sizeof(struct ofp_match))) {
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received FLOW_REMOVED message has invalid length (%zu).", *len);
}
return OFL_ERROR;
}
sr = (struct ofp_flow_removed *)src;
if (sr->table_id == 0xff) {
if (errbuf != NULL) {
char *ts = ofl_table_to_string(sr->table_id);
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received FLOW_REMOVED message has invalid table_id (%s).", ts);
free(ts);
}
return ofl_error(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
}
*len -= (sizeof(struct ofp_flow_removed) - sizeof(struct ofp_match));
dr = (struct ofl_msg_flow_removed *)malloc(sizeof(struct ofl_msg_flow_removed));
dr->reason = (enum ofp_flow_removed_reason)sr->reason;
dr->stats = (struct ofl_flow_stats *)malloc(sizeof(struct ofl_flow_stats));
dr->stats->table_id = sr->table_id;
dr->stats->duration_sec = ntohl( sr->duration_sec);
dr->stats->duration_nsec = ntohl( sr->duration_nsec);
dr->stats->priority = ntoh64(sr->priority);
dr->stats->idle_timeout = ntohs( sr->idle_timeout);
dr->stats->hard_timeout = 0;
dr->stats->cookie = ntoh64(sr->cookie);
dr->stats->packet_count = ntoh64(sr->packet_count);
dr->stats->byte_count = ntoh64(sr->byte_count);
dr->stats->instructions_num = 0;
dr->stats->instructions = NULL;
error = ofl_structs_match_unpack(&(sr->match), len, &(dr->stats->match), exp, errbuf);
if (error) {
free(dr->stats);
free(dr);
return error;
}
*msg = (struct ofl_msg_header *)dr;
return 0;
}
static ofl_err
ofl_msg_unpack_packet_in(struct ofp_header *src, size_t *len, struct ofl_msg_header **msg, char *errbuf) {
struct ofp_packet_in *sp;
struct ofl_msg_packet_in *dp;
if (*len < sizeof(struct ofp_packet_in)) {
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received PACKET_IN message has invalid length (%zu).", *len);
}
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
sp = (struct ofp_packet_in *)src;
if (ntohl(sp->in_port) == 0 ||
(ntohl(sp->in_port) > OFPP_MAX &&
ntohl(sp->in_port) != OFPP_LOCAL)) {
if (errbuf != NULL) {
char *ps = ofl_port_to_string(ntohl(sp->in_port));
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received PACKET_IN message has invalid in_port (%s).", ps);
free(ps);
}
return ofl_error(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
}
if (sp->table_id == 0xff) {
if (errbuf != NULL) {
char *ts = ofl_table_to_string(sp->table_id);
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received PACKET_IN has invalid table_id (%s).", ts);
free(ts);
}
return ofl_error(OFPET_BAD_ACTION, OFPBAC_BAD_ARGUMENT);
}
*len -= sizeof(struct ofp_packet_in);
dp = (struct ofl_msg_packet_in *)malloc(sizeof(struct ofl_msg_packet_in));
dp->buffer_id = ntohl(sp->buffer_id);
dp->in_port = ntohl(sp->in_port);
dp->in_phy_port = ntohl(sp->in_phy_port);
dp->total_len = ntohs(sp->total_len);
dp->reason = (enum ofp_packet_in_reason)sp->reason;
dp->table_id = sp->table_id;
dp->data_length = *len;
dp->data = *len > 0 ? (uint8_t *)memcpy(malloc(*len), sp->data, *len) : NULL;
*len = 0;
*msg = (struct ofl_msg_header *)dp;
return 0;
}
ofl_err
ofl_structs_table_stats_unpack(struct ofp_table_stats *src, size_t *len, struct ofl_table_stats **dst, char *errbuf) {
struct ofl_table_stats *p;
if (*len < sizeof(struct ofp_table_stats)) {
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received table stats has invalid length (%zu).", *len);
}
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
if (src->table_id == 0xff) {
if (errbuf != NULL) {
char *ts = ofl_table_to_string(src->table_id);
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received table stats has invalid table_id (%s).", ts);
free(ts);
}
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
*len -= sizeof(struct ofp_table_stats);
p = (struct ofl_table_stats *)malloc(sizeof(struct ofl_table_stats));
p->table_id = src->table_id;
p->name = strcpy((char *)malloc(strlen(src->name) + 1), src->name);
p->wildcards = ntohl(src->wildcards);
p->match = ntohl(src->match);
p->instructions = ntohl(src->instructions);
p->write_actions = ntohl(src->write_actions);
p->apply_actions = ntohl(src->apply_actions);
p->config = ntohl(src->config);
p->max_entries = ntohl(src->max_entries);
p->active_count = ntohl(src->active_count);
p->lookup_count = ntoh64(src->lookup_count);
p->matched_count = ntoh64(src->matched_count);
*dst = p;
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;
}
ofl_err
ofl_structs_flow_stats_unpack(struct ofp_flow_stats *src, size_t *len, struct ofl_flow_stats **dst, struct ofl_exp *exp, char *errbuf) {
struct ofl_flow_stats *s;
struct ofp_instruction *inst;
ofl_err error;
size_t slen;
size_t i;
if (*len < (sizeof(struct ofp_flow_stats) - sizeof(struct ofp_match))) {
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received flow stats has invalid length (%zu).", *len);
}
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
if (*len < ntohs(src->length)) {
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received flow stats reply has invalid length (set to %u, but only %zu received).", ntohs(src->length), *len);
}
return ofl_error(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
}
if (src->table_id == 0xff) {
if (errbuf != NULL) {
char *ts = ofl_table_to_string(src->table_id);
snprintf(errbuf, OFL_ERRBUF_SIZE, "Received flow stats has invalid table_id (%s).", ts);
free(ts);
}
return ofl_error(OFPET_BAD_ACTION, OFPBRC_BAD_LEN);
}
slen = ntohs(src->length) - (sizeof(struct ofp_flow_stats) - sizeof(struct ofp_match));
s = (struct ofl_flow_stats *)malloc(sizeof(struct ofl_flow_stats));
s->table_id = src->table_id;
s->duration_sec = ntohl( src->duration_sec);
s->duration_nsec = ntohl( src->duration_nsec);
s->priority = ntohs( src->priority);
s->idle_timeout = ntohs( src->idle_timeout);
s->hard_timeout = ntohs( src->hard_timeout);
s->cookie = ntoh64(src->cookie);
s->packet_count = ntoh64(src->packet_count);
s->byte_count = ntoh64(src->byte_count);
error = ofl_structs_match_unpack(&(src->match), &slen, &(s->match), exp, errbuf);
if (error) {
free(s);
return error;
}
error = ofl_utils_count_ofp_instructions(src->instructions, slen, &s->instructions_num, errbuf);
if (error) {
ofl_structs_free_match(s->match, exp, NULL);
free(s);
return error;
}
s->instructions = (struct ofl_instruction_header **)malloc(s->instructions_num * sizeof(struct ofl_instruction_header *));
inst = src->instructions;
for (i = 0; i < s->instructions_num; i++) {
error = ofl_structs_instructions_unpack(inst, &slen, &(s->instructions[i]), exp, errbuf);
if (error) {
OFL_UTILS_FREE_ARR_FUN3(s->instructions, i,
ofl_structs_free_instruction, exp, errbuf);
free(s);
return error;
}
inst = (struct ofp_instruction *)((uint8_t *)inst + ntohs(inst->len));
}
if (slen != 0) {
*len = *len - ntohs(src->length) + slen;
if (errbuf != NULL) {
snprintf(errbuf, OFL_ERRBUF_SIZE, "The received flow stats contained extra bytes (%zu).", slen);
}
ofl_structs_free_flow_stats(s, exp, errbuf);
return ofl_error(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
}
*len -= ntohs(src->length);
*dst = s;
return 0;
}
ofl_err
ofl_structs_flow_stats_unpack(struct ofp_flow_stats *src, uint8_t *buf, size_t *len, struct ofl_flow_stats **dst, struct ofl_exp *exp) {
struct ofl_flow_stats *s;
struct ofp_instruction *inst;
ofl_err error;
size_t slen;
size_t i;
int match_pos;
if (*len < ( (sizeof(struct ofp_flow_stats) - sizeof(struct ofp_match)) + ROUND_UP(ntohs(src->match.length),8))) {
OFL_LOG_WARN(LOG_MODULE, "Received flow stats has invalid length (%zu).", *len);
return ofl_error(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
}
if (*len < ntohs(src->length)) {
OFL_LOG_WARN(LOG_MODULE, "Received flow stats reply has invalid length (set to %u, but only %zu received).", ntohs(src->length), *len);
return ofl_error(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
}
if (src->table_id >= PIPELINE_TABLES) {
if (OFL_LOG_IS_WARN_ENABLED(LOG_MODULE)) {
char *ts = ofl_table_to_string(src->table_id);
OFL_LOG_WARN(LOG_MODULE, "Received flow stats has invalid table_id (%s).", ts);
free(ts);
}
return ofl_error(OFPET_BAD_REQUEST, OFPBRC_BAD_TABLE_ID);
}
slen = ntohs(src->length) - (sizeof(struct ofp_flow_stats) - sizeof(struct ofp_match));
s = (struct ofl_flow_stats *)malloc(sizeof(struct ofl_flow_stats));
s->table_id = src->table_id;
s->duration_sec = ntohl( src->duration_sec);
s->duration_nsec = ntohl( src->duration_nsec);
s->priority = ntohs( src->priority);
s->idle_timeout = ntohs( src->idle_timeout);
s->hard_timeout = ntohs( src->hard_timeout);
s->cookie = ntoh64(src->cookie);
s->packet_count = ntoh64(src->packet_count);
s->byte_count = ntoh64(src->byte_count);
match_pos = sizeof(struct ofp_flow_stats) - 4;
error = ofl_structs_match_unpack(&(src->match),buf + match_pos , &slen, &(s->match), exp);
if (error) {
free(s);
return error;
}
error = ofl_utils_count_ofp_instructions((struct ofp_instruction *) (buf + ROUND_UP(match_pos + s->match->length,8)),
slen, &s->instructions_num);
if (error) {
ofl_structs_free_match(s->match, exp);
free(s);
return error;
}
s->instructions = (struct ofl_instruction_header **)malloc(s->instructions_num * sizeof(struct ofl_instruction_header *));
inst = (struct ofp_instruction *) (buf + ROUND_UP(match_pos + s->match->length,8));
for (i = 0; i < s->instructions_num; i++) {
error = ofl_structs_instructions_unpack(inst, &slen, &(s->instructions[i]), exp);
if (error) {
OFL_UTILS_FREE_ARR_FUN2(s->instructions, i,
ofl_structs_free_instruction, exp);
free(s);
return error;
}
inst = (struct ofp_instruction *)((uint8_t *)inst + ntohs(inst->len));
}
if (slen != 0) {
*len = *len - ntohs(src->length) + slen;
OFL_LOG_WARN(LOG_MODULE, "The received flow stats contained extra bytes (%zu).", slen);
ofl_structs_free_flow_stats(s, exp);
return ofl_error(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
}
*len -= ntohs(src->length);
*dst = s;
return 0;
}
