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Diffstat (limited to 'include/haproxy/mqtt.h')
| -rw-r--r-- | include/haproxy/mqtt.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/include/haproxy/mqtt.h b/include/haproxy/mqtt.h new file mode 100644 index 0000000..6720bb7 --- /dev/null +++ b/include/haproxy/mqtt.h @@ -0,0 +1,118 @@ +/* + * include/haproxt/mqtt.h + * This file contains structure declarations for MQTT protocol. + * + * Copyright 2020 Baptiste Assmann <bedis9@gmail.com> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation, version 2.1 + * exclusively. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef _HAPROXY_MQTT_H +#define _HAPROXY_MQTT_H + +#include <import/ist.h> + +#include <haproxy/mqtt-t.h> +#include <haproxy/tools.h> + +/* expected flags for control packets */ +extern uint8_t mqtt_cpt_flags[MQTT_CPT_ENTRIES]; + +/* MQTT field string names */ +extern const struct ist mqtt_fields_string[MQTT_FN_ENTRIES]; + +/* list of supported capturable field names for each MQTT control packet type */ +extern const uint64_t mqtt_fields_per_packet[MQTT_CPT_ENTRIES]; + +int mqtt_validate_message(const struct ist msg, struct mqtt_pkt *mpkt); +struct ist mqtt_field_value(const struct ist msg, int type, int fieldname_id); + +/* + * Return a MQTT packet type ID based found in <str>. + * <str> can be a number or a string and returned value will always be the numeric value. + * + * If <str> can't be translated into an ID, then MQTT_CPT_INVALID (0) is returned. + */ +static inline int mqtt_typeid(struct ist str) +{ + int id; + + id = strl2ui(str.ptr, istlen(str)); + if ((id >= MQTT_CPT_CONNECT) && (id < MQTT_CPT_ENTRIES)) + return id; + + else if (isteqi(str, ist("CONNECT")) != 0) + return MQTT_CPT_CONNECT; + else if (isteqi(str, ist("CONNACK")) != 0) + return MQTT_CPT_CONNACK; + else if (isteqi(str, ist("PUBLISH")) != 0) + return MQTT_CPT_PUBLISH; + else if (isteqi(str, ist("PUBACK")) != 0) + return MQTT_CPT_PUBACK; + else if (isteqi(str, ist("PUBREC")) != 0) + return MQTT_CPT_PUBREC; + else if (isteqi(str, ist("PUBREL")) != 0) + return MQTT_CPT_PUBREL; + else if (isteqi(str, ist("PUBCOMP")) != 0) + return MQTT_CPT_PUBCOMP; + else if (isteqi(str, ist("SUBSCRIBE")) != 0) + return MQTT_CPT_SUBSCRIBE; + else if (isteqi(str, ist("SUBACK")) != 0) + return MQTT_CPT_SUBACK; + else if (isteqi(str, ist("UNSUBSCRIBE")) != 0) + return MQTT_CPT_UNSUBSCRIBE; + else if (isteqi(str, ist("UNSUBACK")) != 0) + return MQTT_CPT_UNSUBACK; + else if (isteqi(str, ist("PINGREQ")) != 0) + return MQTT_CPT_PINGREQ; + else if (isteqi(str, ist("PINGRESP")) != 0) + return MQTT_CPT_PINGRESP; + else if (isteqi(str, ist("DISCONNECT")) != 0) + return MQTT_CPT_DISCONNECT; + else if (isteqi(str, ist("AUTH")) != 0) + return MQTT_CPT_AUTH; + + return MQTT_CPT_INVALID; +} + +/* + * validate that <str> is a field that can be extracted from a <type> MQTT packet + * + * return the field name ID (MQTT_FN_*) if a match is found, MQTT_FN_INVALID (0) otherwise. + */ +static inline int mqtt_check_type_fieldname(int type, struct ist str) +{ + int i, id = MQTT_FN_INVALID; + + for (i = 0; i < MQTT_FN_ENTRIES; i++) { + if (isteqi(str, mqtt_fields_string[i])) { + if (mqtt_fields_per_packet[type] & (1ULL << i)) + id = i; + break; + } + } + + return id; + +} + +#endif /* _HAPROXY_MQTT_H */ + +/* + * Local variables: + * c-indent-level: 8 + * c-basic-offset: 8 + * End: + */ |