| #include <arpa/inet.h> |
| #include <string.h> |
| |
| #include <haproxy/global.h> |
| #include <haproxy/ncbuf-t.h> |
| #include <haproxy/net_helper.h> |
| #include <haproxy/quic_conn.h> |
| #include <haproxy/quic_enc.h> |
| #include <haproxy/quic_tp.h> |
| #include <haproxy/trace.h> |
| |
| #define QUIC_MAX_UDP_PAYLOAD_SIZE 2048 |
| |
| #define TRACE_SOURCE &trace_quic |
| |
| /* This is the values of some QUIC transport parameters when absent. |
| * Should be used to initialize any transport parameters (local or remote) |
| * before updating them with customized values. |
| */ |
| struct quic_transport_params quic_dflt_transport_params = { |
| .max_udp_payload_size = QUIC_TP_DFLT_MAX_UDP_PAYLOAD_SIZE, |
| .ack_delay_exponent = QUIC_TP_DFLT_ACK_DELAY_COMPONENT, |
| .max_ack_delay = QUIC_TP_DFLT_MAX_ACK_DELAY, |
| .active_connection_id_limit = QUIC_TP_DFLT_ACTIVE_CONNECTION_ID_LIMIT, |
| }; |
| |
| /* Initialize <dst> transport parameters with default values (when absent) |
| * from <quic_dflt_transport_params>. |
| * Never fails. |
| */ |
| static void quic_dflt_transport_params_cpy(struct quic_transport_params *dst) |
| { |
| dst->max_udp_payload_size = quic_dflt_transport_params.max_udp_payload_size; |
| dst->ack_delay_exponent = quic_dflt_transport_params.ack_delay_exponent; |
| dst->max_ack_delay = quic_dflt_transport_params.max_ack_delay; |
| dst->active_connection_id_limit = quic_dflt_transport_params.active_connection_id_limit; |
| } |
| |
| /* Initialize <p> transport parameters. <server> is a boolean, set if TPs are |
| * used by a server (haproxy frontend) else this is for a client (haproxy |
| * backend). |
| * |
| * This must only be used for haproxy local parameters. To initialize peer |
| * parameters, see quic_dflt_transport_params_cpy(). |
| * |
| * Never fails. |
| */ |
| void quic_transport_params_init(struct quic_transport_params *p, int server) |
| { |
| const uint64_t ncb_size = global.tune.bufsize - NCB_RESERVED_SZ; |
| const int max_streams_bidi = global.tune.quic_frontend_max_streams_bidi; |
| const int max_streams_uni = 3; |
| |
| /* Set RFC default values for unspecified parameters. */ |
| quic_dflt_transport_params_cpy(p); |
| |
| /* Set the max_udp_payload_size value. If not would equal to |
| * QUIC_TP_DFLT_MAX_UDP_PAYLOAD_SIZE |
| */ |
| p->max_udp_payload_size = QUIC_MAX_UDP_PAYLOAD_SIZE; |
| if (server) |
| p->max_idle_timeout = global.tune.quic_frontend_max_idle_timeout; |
| else |
| p->max_idle_timeout = global.tune.quic_backend_max_idle_timeout; |
| |
| p->initial_max_streams_bidi = max_streams_bidi; |
| p->initial_max_streams_uni = max_streams_uni; |
| p->initial_max_stream_data_bidi_local = ncb_size; |
| p->initial_max_stream_data_bidi_remote = ncb_size; |
| p->initial_max_stream_data_uni = ncb_size; |
| p->initial_max_data = (max_streams_bidi + max_streams_uni) * ncb_size; |
| |
| if (server) { |
| p->with_stateless_reset_token = 1; |
| p->disable_active_migration = 1; |
| } |
| |
| p->active_connection_id_limit = 8; |
| |
| p->retry_source_connection_id.len = 0; |
| } |
| |
| /* Encode <addr> preferred address transport parameter in <buf> without its |
| * "type+len" prefix. Note that the IP addresses must be encoded in network byte |
| * order. |
| * So ->ipv4_addr and ->ipv6_addr, which are buffers, must contained values |
| * already encoded in network byte order. |
| * It is the responsibility of the caller to check there is enough room in <buf> to encode |
| * this address. |
| * Never fails. |
| */ |
| static void quic_transport_param_enc_pref_addr_val(unsigned char **buf, |
| const unsigned char *end, |
| struct tp_preferred_address *addr) |
| { |
| write_n16(*buf, addr->ipv4_port); |
| *buf += sizeof addr->ipv4_port; |
| |
| memcpy(*buf, addr->ipv4_addr, sizeof addr->ipv4_addr); |
| *buf += sizeof addr->ipv4_addr; |
| |
| write_n16(*buf, addr->ipv6_port); |
| *buf += sizeof addr->ipv6_port; |
| |
| memcpy(*buf, addr->ipv6_addr, sizeof addr->ipv6_addr); |
| *buf += sizeof addr->ipv6_addr; |
| |
| *(*buf)++ = addr->cid.len; |
| if (addr->cid.len) { |
| memcpy(*buf, addr->cid.data, addr->cid.len); |
| *buf += addr->cid.len; |
| } |
| |
| memcpy(*buf, addr->stateless_reset_token, sizeof addr->stateless_reset_token); |
| *buf += sizeof addr->stateless_reset_token; |
| } |
| |
| /* Decode into <addr> preferred address transport parameter found in <*buf> buffer. |
| * Returns 1 if succeeded, 0 if not. |
| */ |
| static int quic_transport_param_dec_pref_addr(struct tp_preferred_address *addr, |
| const unsigned char **buf, |
| const unsigned char *end) |
| { |
| ssize_t addr_len; |
| |
| addr_len = sizeof addr->ipv4_port + sizeof addr->ipv4_addr; |
| addr_len += sizeof addr->ipv6_port + sizeof addr->ipv6_addr; |
| addr_len += sizeof addr->cid.len; |
| |
| if (end - *buf < addr_len) |
| return 0; |
| |
| addr->ipv4_port = read_n16(*buf); |
| *buf += sizeof addr->ipv4_port; |
| |
| memcpy(addr->ipv4_addr, *buf, sizeof addr->ipv4_addr); |
| *buf += sizeof addr->ipv4_addr; |
| |
| addr->ipv6_port = read_n16(*buf); |
| *buf += sizeof addr->ipv6_port; |
| |
| memcpy(addr->ipv6_addr, *buf, sizeof addr->ipv6_addr); |
| *buf += sizeof addr->ipv6_addr; |
| |
| addr->cid.len = *(*buf)++; |
| if (addr->cid.len) { |
| if (end - *buf > addr->cid.len || addr->cid.len > sizeof addr->cid.data) |
| return 0; |
| memcpy(addr->cid.data, *buf, addr->cid.len); |
| *buf += addr->cid.len; |
| } |
| |
| if (end - *buf != sizeof addr->stateless_reset_token) |
| return 0; |
| |
| memcpy(addr->stateless_reset_token, *buf, end - *buf); |
| *buf += sizeof addr->stateless_reset_token; |
| |
| return *buf == end; |
| } |
| |
| /* Decode into <v> version information received transport parameters from <*buf> |
| * buffer. <server> must be set to 1 for QUIC clients which receive server |
| * transport parameters, and 0 for QUIC servers which receive client transport |
| * parameters. |
| * Also set the QUIC negotiated version into <tp>. |
| * Return 1 if succeeded, 0 if not. |
| */ |
| static int quic_transport_param_dec_version_info(struct tp_version_information *tp, |
| const unsigned char **buf, |
| const unsigned char *end, int server) |
| { |
| size_t tp_len = end - *buf; |
| const uint32_t *ver; |
| |
| /* <tp_len> must be a multiple of sizeof(uint32_t) */ |
| if (tp_len < sizeof tp->chosen || (tp_len & 0x3)) |
| return 0; |
| |
| tp->chosen = ntohl(*(uint32_t *)*buf); |
| /* Must not be null */ |
| if (!tp->chosen) |
| return 0; |
| |
| *buf += sizeof tp->chosen; |
| tp->others = (const uint32_t *)*buf; |
| |
| /* Others versions must not be null */ |
| for (ver = tp->others; ver < (const uint32_t *)end; ver++) { |
| if (!*ver) |
| return 0; |
| } |
| |
| if (server) |
| /* TODO: not supported */ |
| return 0; |
| |
| tp->nb_others = (end - (const unsigned char *)tp->others) / sizeof *tp->others; |
| for (ver = tp->others; ver < (const uint32_t *)end; ver++) { |
| if (!tp->negotiated_version) { |
| int i; |
| |
| for (i = 0; i < quic_versions_nb; i++) { |
| if (ntohl(*ver) == quic_versions[i].num) { |
| tp->negotiated_version = &quic_versions[i]; |
| break; |
| } |
| } |
| } |
| |
| if (preferred_version && ntohl(*ver) == preferred_version->num) { |
| tp->negotiated_version = preferred_version; |
| goto out; |
| } |
| } |
| |
| out: |
| *buf = end; |
| |
| return 1; |
| } |
| |
| /* Decode into <p> struct a transport parameter found in <*buf> buffer with |
| * <type> as type and <len> as length, depending on <server> boolean value which |
| * must be set to 1 for a server (haproxy listener) or 0 for a client (connection |
| * to an haproxy server). |
| */ |
| static int quic_transport_param_decode(struct quic_transport_params *p, |
| int server, uint64_t type, |
| const unsigned char **buf, size_t len) |
| { |
| const unsigned char *end = *buf + len; |
| |
| switch (type) { |
| case QUIC_TP_ORIGINAL_DESTINATION_CONNECTION_ID: |
| if (!server || len > sizeof p->original_destination_connection_id.data) |
| return 0; |
| |
| if (len) |
| memcpy(p->original_destination_connection_id.data, *buf, len); |
| p->original_destination_connection_id.len = len; |
| *buf += len; |
| p->original_destination_connection_id_present = 1; |
| break; |
| case QUIC_TP_INITIAL_SOURCE_CONNECTION_ID: |
| if (len > sizeof p->initial_source_connection_id.data) |
| return 0; |
| |
| if (len) |
| memcpy(p->initial_source_connection_id.data, *buf, len); |
| p->initial_source_connection_id.len = len; |
| *buf += len; |
| p->initial_source_connection_id_present = 1; |
| break; |
| case QUIC_TP_STATELESS_RESET_TOKEN: |
| if (!server || len != sizeof p->stateless_reset_token) |
| return 0; |
| memcpy(p->stateless_reset_token, *buf, len); |
| *buf += len; |
| p->with_stateless_reset_token = 1; |
| break; |
| case QUIC_TP_PREFERRED_ADDRESS: |
| if (!server) |
| return 0; |
| if (!quic_transport_param_dec_pref_addr(&p->preferred_address, buf, *buf + len)) |
| return 0; |
| p->with_preferred_address = 1; |
| break; |
| case QUIC_TP_MAX_IDLE_TIMEOUT: |
| if (!quic_dec_int(&p->max_idle_timeout, buf, end)) |
| return 0; |
| break; |
| case QUIC_TP_MAX_UDP_PAYLOAD_SIZE: |
| if (!quic_dec_int(&p->max_udp_payload_size, buf, end)) |
| return 0; |
| break; |
| case QUIC_TP_INITIAL_MAX_DATA: |
| if (!quic_dec_int(&p->initial_max_data, buf, end)) |
| return 0; |
| break; |
| case QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL: |
| if (!quic_dec_int(&p->initial_max_stream_data_bidi_local, buf, end)) |
| return 0; |
| break; |
| case QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE: |
| if (!quic_dec_int(&p->initial_max_stream_data_bidi_remote, buf, end)) |
| return 0; |
| break; |
| case QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI: |
| if (!quic_dec_int(&p->initial_max_stream_data_uni, buf, end)) |
| return 0; |
| break; |
| case QUIC_TP_INITIAL_MAX_STREAMS_BIDI: |
| if (!quic_dec_int(&p->initial_max_streams_bidi, buf, end)) |
| return 0; |
| break; |
| case QUIC_TP_INITIAL_MAX_STREAMS_UNI: |
| if (!quic_dec_int(&p->initial_max_streams_uni, buf, end)) |
| return 0; |
| break; |
| case QUIC_TP_ACK_DELAY_EXPONENT: |
| if (!quic_dec_int(&p->ack_delay_exponent, buf, end) || |
| p->ack_delay_exponent > QUIC_TP_ACK_DELAY_EXPONENT_LIMIT) |
| return 0; |
| break; |
| case QUIC_TP_MAX_ACK_DELAY: |
| if (!quic_dec_int(&p->max_ack_delay, buf, end) || |
| p->max_ack_delay > QUIC_TP_MAX_ACK_DELAY_LIMIT) |
| return 0; |
| break; |
| case QUIC_TP_DISABLE_ACTIVE_MIGRATION: |
| /* Zero-length parameter type. */ |
| if (len != 0) |
| return 0; |
| p->disable_active_migration = 1; |
| break; |
| case QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT: |
| if (!quic_dec_int(&p->active_connection_id_limit, buf, end)) |
| return 0; |
| break; |
| case QUIC_TP_VERSION_INFORMATION: |
| if (!quic_transport_param_dec_version_info(&p->version_information, |
| buf, *buf + len, server)) |
| return 0; |
| break; |
| default: |
| *buf += len; |
| }; |
| |
| return *buf == end; |
| } |
| |
| /* Encode <type> and <len> variable length values in <buf>. |
| * Returns 1 if succeeded, 0 if not. |
| */ |
| static int quic_transport_param_encode_type_len(unsigned char **buf, |
| const unsigned char *end, |
| uint64_t type, uint64_t len) |
| { |
| return quic_enc_int(buf, end, type) && quic_enc_int(buf, end, len); |
| } |
| |
| /* Decode variable length type and length values of a QUIC transport parameter |
| * into <type> and <len> found in <*buf> buffer. |
| * Returns 1 if succeeded, 0 if not. |
| */ |
| static int quic_transport_param_decode_type_len(uint64_t *type, uint64_t *len, |
| const unsigned char **buf, |
| const unsigned char *end) |
| { |
| return quic_dec_int(type, buf, end) && quic_dec_int(len, buf, end); |
| } |
| |
| /* Encode <param> bytes stream with <type> as type and <length> as length into buf. |
| * Returns 1 if succeeded, 0 if not. |
| */ |
| static int quic_transport_param_enc_mem(unsigned char **buf, const unsigned char *end, |
| uint64_t type, void *param, uint64_t length) |
| { |
| if (!quic_transport_param_encode_type_len(buf, end, type, length)) |
| return 0; |
| |
| if (end - *buf < length) |
| return 0; |
| |
| if (length) |
| memcpy(*buf, param, length); |
| *buf += length; |
| |
| return 1; |
| } |
| |
| /* Encode <val> 64-bits value as variable length integer into <buf>. |
| * Returns 1 if succeeded, 0 if not. |
| */ |
| static int quic_transport_param_enc_int(unsigned char **buf, |
| const unsigned char *end, |
| uint64_t type, uint64_t val) |
| { |
| size_t len; |
| |
| len = quic_int_getsize(val); |
| |
| return len && quic_transport_param_encode_type_len(buf, end, type, len) && |
| quic_enc_int(buf, end, val); |
| } |
| |
| /* Returns the required length in bytes to encode <cid> QUIC connection ID. */ |
| static inline size_t sizeof_quic_cid(const struct tp_cid *cid) |
| { |
| return sizeof cid->len + cid->len; |
| } |
| |
| /* Encode <addr> preferred address into <buf>. |
| * Note that the IP addresses must be encoded in network byte order. |
| * So ->ipv4_addr and ->ipv6_addr, which are buffers, must contained |
| * values already encoded in network byte order. |
| * Returns 1 if succeeded, 0 if not. |
| */ |
| static int quic_transport_param_enc_pref_addr(unsigned char **buf, |
| const unsigned char *end, |
| struct tp_preferred_address *addr) |
| { |
| uint64_t addr_len = 0; |
| |
| addr_len += sizeof addr->ipv4_port + sizeof addr->ipv4_addr; |
| addr_len += sizeof addr->ipv6_port + sizeof addr->ipv6_addr; |
| addr_len += sizeof_quic_cid(&addr->cid); |
| addr_len += sizeof addr->stateless_reset_token; |
| |
| if (!quic_transport_param_encode_type_len(buf, end, QUIC_TP_PREFERRED_ADDRESS, addr_len)) |
| return 0; |
| |
| if (end - *buf < addr_len) |
| return 0; |
| |
| quic_transport_param_enc_pref_addr_val(buf, end, addr); |
| |
| return 1; |
| } |
| |
| /* Encode version information transport parameters with <chosen_version> as chosen |
| * version. |
| * Return 1 if succeeded, 0 if not. |
| */ |
| static int quic_transport_param_enc_version_info(unsigned char **buf, |
| const unsigned char *end, |
| const struct quic_version *chosen_version, |
| int server) |
| { |
| int i; |
| uint64_t tp_len; |
| uint32_t ver; |
| |
| tp_len = sizeof chosen_version->num + quic_versions_nb * sizeof(uint32_t); |
| if (!quic_transport_param_encode_type_len(buf, end, |
| QUIC_TP_VERSION_INFORMATION, |
| tp_len)) |
| return 0; |
| |
| if (end - *buf < tp_len) |
| return 0; |
| |
| /* First: chosen version */ |
| ver = htonl(chosen_version->num); |
| memcpy(*buf, &ver, sizeof ver); |
| *buf += sizeof ver; |
| /* For servers: all supported version, chosen included */ |
| for (i = 0; i < quic_versions_nb; i++) { |
| ver = htonl(quic_versions[i].num); |
| memcpy(*buf, &ver, sizeof ver); |
| *buf += sizeof ver; |
| } |
| |
| return 1; |
| } |
| |
| /* Encode <p> transport parameter into <buf> depending on <server> value which |
| * must be set to 1 for a server (haproxy listener) or 0 for a client |
| * (connection to a haproxy server). |
| * Return the number of bytes consumed if succeeded, 0 if not. |
| */ |
| int quic_transport_params_encode(unsigned char *buf, |
| const unsigned char *end, |
| struct quic_transport_params *p, |
| const struct quic_version *chosen_version, |
| int server) |
| { |
| unsigned char *head; |
| unsigned char *pos; |
| |
| head = pos = buf; |
| if (server) { |
| if (!quic_transport_param_enc_mem(&pos, end, |
| QUIC_TP_ORIGINAL_DESTINATION_CONNECTION_ID, |
| p->original_destination_connection_id.data, |
| p->original_destination_connection_id.len)) |
| return 0; |
| |
| if (p->retry_source_connection_id.len) { |
| if (!quic_transport_param_enc_mem(&pos, end, |
| QUIC_TP_RETRY_SOURCE_CONNECTION_ID, |
| p->retry_source_connection_id.data, |
| p->retry_source_connection_id.len)) |
| return 0; |
| } |
| |
| if (p->with_stateless_reset_token && |
| !quic_transport_param_enc_mem(&pos, end, QUIC_TP_STATELESS_RESET_TOKEN, |
| p->stateless_reset_token, |
| sizeof p->stateless_reset_token)) |
| return 0; |
| if (p->with_preferred_address && |
| !quic_transport_param_enc_pref_addr(&pos, end, &p->preferred_address)) |
| return 0; |
| } |
| |
| if (!quic_transport_param_enc_mem(&pos, end, |
| QUIC_TP_INITIAL_SOURCE_CONNECTION_ID, |
| p->initial_source_connection_id.data, |
| p->initial_source_connection_id.len)) |
| return 0; |
| |
| if (p->max_idle_timeout && |
| !quic_transport_param_enc_int(&pos, end, QUIC_TP_MAX_IDLE_TIMEOUT, p->max_idle_timeout)) |
| return 0; |
| |
| /* |
| * "max_packet_size" transport parameter must be transmitted only if different |
| * of the default value. |
| */ |
| if (p->max_udp_payload_size != QUIC_TP_DFLT_MAX_UDP_PAYLOAD_SIZE && |
| !quic_transport_param_enc_int(&pos, end, QUIC_TP_MAX_UDP_PAYLOAD_SIZE, p->max_udp_payload_size)) |
| return 0; |
| |
| if (p->initial_max_data && |
| !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_DATA, p->initial_max_data)) |
| return 0; |
| |
| if (p->initial_max_stream_data_bidi_local && |
| !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL, |
| p->initial_max_stream_data_bidi_local)) |
| return 0; |
| |
| if (p->initial_max_stream_data_bidi_remote && |
| !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE, |
| p->initial_max_stream_data_bidi_remote)) |
| return 0; |
| |
| if (p->initial_max_stream_data_uni && |
| !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAM_DATA_UNI, |
| p->initial_max_stream_data_uni)) |
| return 0; |
| |
| if (p->initial_max_streams_bidi && |
| !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAMS_BIDI, |
| p->initial_max_streams_bidi)) |
| return 0; |
| |
| if (p->initial_max_streams_uni && |
| !quic_transport_param_enc_int(&pos, end, QUIC_TP_INITIAL_MAX_STREAMS_UNI, |
| p->initial_max_streams_uni)) |
| return 0; |
| |
| /* |
| * "ack_delay_exponent" transport parameter must be transmitted only if different |
| * of the default value. |
| */ |
| if (p->ack_delay_exponent != QUIC_TP_DFLT_ACK_DELAY_COMPONENT && |
| !quic_transport_param_enc_int(&pos, end, QUIC_TP_ACK_DELAY_EXPONENT, p->ack_delay_exponent)) |
| return 0; |
| |
| /* |
| * "max_ack_delay" transport parameter must be transmitted only if different |
| * of the default value. |
| */ |
| if (p->max_ack_delay != QUIC_TP_DFLT_MAX_ACK_DELAY && |
| !quic_transport_param_enc_int(&pos, end, QUIC_TP_MAX_ACK_DELAY, p->max_ack_delay)) |
| return 0; |
| |
| /* 0-length value */ |
| if (p->disable_active_migration && |
| !quic_transport_param_encode_type_len(&pos, end, QUIC_TP_DISABLE_ACTIVE_MIGRATION, 0)) |
| return 0; |
| |
| if (p->active_connection_id_limit && |
| p->active_connection_id_limit != QUIC_TP_DFLT_ACTIVE_CONNECTION_ID_LIMIT && |
| !quic_transport_param_enc_int(&pos, end, QUIC_TP_ACTIVE_CONNECTION_ID_LIMIT, |
| p->active_connection_id_limit)) |
| return 0; |
| |
| if (!quic_transport_param_enc_version_info(&pos, end, chosen_version, server)) |
| return 0; |
| |
| return pos - head; |
| } |
| |
| /* Decode transport parameters found in <buf> buffer into <p>, depending on |
| * <server> boolean value which must be set to 1 for a server (haproxy listener) |
| * or 0 for a client (connection to a haproxy server). |
| * Returns 1 if succeeded, 0 if not. |
| */ |
| static int quic_transport_params_decode(struct quic_transport_params *p, int server, |
| const unsigned char *buf, |
| const unsigned char *end) |
| { |
| const unsigned char *pos; |
| uint64_t type, len = 0; |
| |
| pos = buf; |
| |
| while (pos != end) { |
| if (!quic_transport_param_decode_type_len(&type, &len, &pos, end)) |
| return 0; |
| |
| if (end - pos < len) |
| return 0; |
| |
| if (!quic_transport_param_decode(p, server, type, &pos, len)) |
| return 0; |
| } |
| |
| /* |
| * A server MUST send original_destination_connection_id transport parameter. |
| * initial_source_connection_id must be present both for server and client. |
| */ |
| if ((server && !p->original_destination_connection_id_present) || |
| !p->initial_source_connection_id_present) |
| return 0; |
| |
| /* Note that if not received by the peer, active_connection_id_limit will |
| * have QUIC_TP_DFLT_ACTIVE_CONNECTION_ID_LIMIT as default value. This |
| * is also the minimum value for this transport parameter. |
| */ |
| if (p->active_connection_id_limit < QUIC_TP_DFLT_ACTIVE_CONNECTION_ID_LIMIT) |
| return 0; |
| |
| return 1; |
| } |
| |
| /* Store transport parameters found in <buf> buffer into <qc> QUIC connection |
| * depending on <server> value which must be 1 for a server (haproxy listener) |
| * or 0 for a client (connection to a haproxy server). |
| * Note that peer transport parameters are stored in the TX part of the connection: |
| * they are used to send packets to the peer with its transport parameters as |
| * limitations. |
| * Returns 1 if succeeded, 0 if not. |
| */ |
| int quic_transport_params_store(struct quic_conn *qc, int server, |
| const unsigned char *buf, |
| const unsigned char *end) |
| { |
| struct quic_transport_params *tx_params = &qc->tx.params; |
| struct quic_transport_params *rx_params = &qc->rx.params; |
| /* Initial source connection ID */ |
| struct tp_cid *iscid; |
| |
| /* initialize peer TPs to RFC default value */ |
| quic_dflt_transport_params_cpy(tx_params); |
| |
| if (!quic_transport_params_decode(tx_params, server, buf, end)) |
| return 0; |
| |
| /* Update the connection from transport parameters received */ |
| if (tx_params->version_information.negotiated_version && |
| tx_params->version_information.negotiated_version != qc->original_version) |
| qc->negotiated_version = |
| qc->tx.params.version_information.negotiated_version; |
| |
| if (tx_params->max_ack_delay) |
| qc->max_ack_delay = tx_params->max_ack_delay; |
| |
| if (tx_params->max_idle_timeout && rx_params->max_idle_timeout) |
| qc->max_idle_timeout = |
| QUIC_MIN(tx_params->max_idle_timeout, rx_params->max_idle_timeout); |
| else |
| qc->max_idle_timeout = |
| QUIC_MAX(tx_params->max_idle_timeout, rx_params->max_idle_timeout); |
| TRACE_PROTO("\nTX(remote) transp. params.", QUIC_EV_TRANSP_PARAMS, qc, tx_params); |
| |
| /* Check that the "initial_source_connection_id" transport parameter matches |
| * the SCID received which is also the DCID of the connection. |
| */ |
| iscid = &tx_params->initial_source_connection_id; |
| if (qc->dcid.len != iscid->len || |
| (qc->dcid.len && memcmp(qc->dcid.data, iscid->data, qc->dcid.len))) { |
| TRACE_PROTO("initial_source_connection_id transport parameter mismatch", |
| QUIC_EV_TRANSP_PARAMS, qc); |
| /* Kill the connection as soon as possible */ |
| qc_kill_conn(qc); |
| } |
| |
| return 1; |
| } |
| |
| /* QUIC server (or haproxy listener) only function. |
| * Initialize the local transport parameters <rx_params> from <listener_params> |
| * coming from configuration and Initial packet information (destination |
| * connection ID, source connection ID, original destination connection ID) from |
| * client token. |
| * Returns 1 if succeeded, 0 if not. |
| */ |
| int qc_lstnr_params_init(struct quic_conn *qc, |
| const struct quic_transport_params *listener_params, |
| const unsigned char *stateless_reset_token, |
| const unsigned char *dcid, size_t dcidlen, |
| const unsigned char *scid, size_t scidlen, |
| const struct quic_cid *token_odcid) |
| { |
| struct quic_transport_params *rx_params = &qc->rx.params; |
| struct tp_cid *odcid_param = &rx_params->original_destination_connection_id; |
| |
| /* Copy the transport parameters. */ |
| *rx_params = *listener_params; |
| /* Copy the stateless reset token */ |
| memcpy(rx_params->stateless_reset_token, stateless_reset_token, |
| sizeof rx_params->stateless_reset_token); |
| /* Copy original_destination_connection_id transport parameter. */ |
| if (token_odcid->len) { |
| memcpy(odcid_param->data, token_odcid->data, token_odcid->len); |
| odcid_param->len = token_odcid->len; |
| /* Copy retry_source_connection_id transport parameter. */ |
| memcpy(rx_params->retry_source_connection_id.data, dcid, dcidlen); |
| rx_params->retry_source_connection_id.len = dcidlen; |
| } |
| else { |
| memcpy(odcid_param->data, dcid, dcidlen); |
| odcid_param->len = dcidlen; |
| } |
| |
| /* Copy the initial source connection ID. */ |
| memcpy(rx_params->initial_source_connection_id.data, scid, scidlen); |
| rx_params->initial_source_connection_id.len = scidlen; |
| TRACE_PROTO("\nRX(local) transp. params.", QUIC_EV_TRANSP_PARAMS, qc, rx_params); |
| |
| return 1; |
| } |
| |