Add documentation for kernel QUIC code.

Signed-off-by: Adel Abouchaev adel.abushaev@gmail.com

---

Added quic.rst reference to the index.rst file; identation in quic.rst file. Reported-by: kernel test robot lkp@intel.com

Added SPDX license GPL 2.0. v2: Removed whitespace at EOF. --- Documentation/networking/index.rst | 1 + Documentation/networking/quic.rst | 185 +++++++++++++++++++++++++++++ 2 files changed, 186 insertions(+) create mode 100644 Documentation/networking/quic.rst

diff --git a/Documentation/networking/index.rst b/Documentation/networking/index.rst index 03b215bddde8..656fa1dac26b 100644 --- a/Documentation/networking/index.rst +++ b/Documentation/networking/index.rst @@ -90,6 +90,7 @@ Contents: plip ppp_generic proc_net_tcp + quic radiotap-headers rds regulatory diff --git a/Documentation/networking/quic.rst b/Documentation/networking/quic.rst new file mode 100644 index 000000000000..ed506b4d6bdd --- /dev/null +++ b/Documentation/networking/quic.rst @@ -0,0 +1,185 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=========== +KERNEL QUIC +=========== + +Overview +======== + +QUIC is a secure general-purpose transport protocol that creates a stateful +interaction between a client and a server. QUIC provides end-to-end integrity +and confidentiality. Refer to RFC 9000 for more information on QUIC. + +The kernel Tx side offload covers the encryption of the application streams +in the kernel rather than in the application. These packets are 1RTT packets +in QUIC connection. Encryption of every other packets is still done by the +QUIC library in user space. + + + +User Interface +============== + +Creating a QUIC connection +-------------------------- + +QUIC connection originates and terminates in the application, using one of many +available QUIC libraries. The code instantiates QUIC client and QUIC server in +some form and configures them to use certain addresses and ports for the +source and destination. The client and server negotiate the set of keys to +protect the communication during different phases of the connection, maintain +the connection and perform congestion control. + +Requesting to add QUIC Tx kernel encryption to the connection +------------------------------------------------------------- + +Each flow that should be encrypted by the kernel needs to be registered with +the kernel using socket API. A setsockopt() call on the socket creates an +association between the QUIC connection ID of the flow with the encryption +parameters for the crypto operations: + +.. code-block:: c + + struct quic_connection_info conn_info; + char conn_id[5] = {0x01, 0x02, 0x03, 0x04, 0x05}; + const size_t conn_id_len = sizeof(conn_id); + char conn_key[16] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f}; + char conn_iv[12] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0a, 0x0b}; + char conn_hdr_key[16] = {0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f + }; + + conn_info.cipher_type = TLS_CIPHER_AES_GCM_128; + + memset(&conn_info.key, 0, sizeof(struct quic_connection_info_key)); + conn_info.key.conn_id_length = 5; + memcpy(&conn_info.key.conn_id[QUIC_MAX_CONNECTION_ID_SIZE + - conn_id_len], + &conn_id, conn_id_len); + + memcpy(&conn_info.payload_key, conn_key, sizeof(conn_key)); + memcpy(&conn_info.payload_iv, conn_iv, sizeof(conn_iv)); + memcpy(&conn_info.header_key, conn_hdr_key, sizeof(conn_hdr_key)); + + setsockopt(fd, SOL_UDP, UDP_QUIC_ADD_TX_CONNECTION, &conn_info, + sizeof(conn_info)); + + +Requesting to remove QUIC Tx kernel crypto offload control messages +------------------------------------------------------------------- + +All flows are removed when the socket is closed. To request an explicit remove +of the offload for the connection during the lifetime of the socket the process +is similar to adding the flow. Only the connection ID and its length are +necessary to supply to remove the connection from the offload: + +.. code-block:: c + + memset(&conn_info.key, 0, sizeof(struct quic_connection_info_key)); + conn_info.key.conn_id_length = 5; + memcpy(&conn_info.key.conn_id[QUIC_MAX_CONNECTION_ID_SIZE + - conn_id_len], + &conn_id, conn_id_len); + setsockopt(fd, SOL_UDP, UDP_QUIC_DEL_TX_CONNECTION, &conn_info, + sizeof(conn_info)); + +Sending QUIC application data +----------------------------- + +For QUIC Tx encryption offload, the application should use sendmsg() socket +call and provide ancillary data with information on connection ID length and +offload flags for the kernel to perform the encryption and GSO support if +requested. + +.. code-block:: c + + size_t cmsg_tx_len = sizeof(struct quic_tx_ancillary_data); + uint8_t cmsg_buf[CMSG_SPACE(cmsg_tx_len)]; + struct quic_tx_ancillary_data * anc_data; + size_t quic_data_len = 4500; + struct cmsghdr * cmsg_hdr; + char quic_data[9000]; + struct iovec iov[2]; + int send_len = 9000; + struct msghdr msg; + int err; + + iov[0].iov_base = quic_data; + iov[0].iov_len = quic_data_len; + iov[1].iov_base = quic_data + 4500; + iov[1].iov_len = quic_data_len; + + if (client.addr.sin_family == AF_INET) { + msg.msg_name = &client.addr; + msg.msg_namelen = sizeof(client.addr); + } else { + msg.msg_name = &client.addr6; + msg.msg_namelen = sizeof(client.addr6); + } + + msg.msg_iov = iov; + msg.msg_iovlen = 2; + msg.msg_control = cmsg_buf; + msg.msg_controllen = sizeof(cmsg_buf); + cmsg_hdr = CMSG_FIRSTHDR(&msg); + cmsg_hdr->cmsg_level = IPPROTO_UDP; + cmsg_hdr->cmsg_type = UDP_QUIC_ENCRYPT; + cmsg_hdr->cmsg_len = CMSG_LEN(cmsg_tx_len); + anc_data = CMSG_DATA(cmsg_hdr); + anc_data->flags = 0; + anc_data->next_pkt_num = 0x0d65c9; + anc_data->conn_id_length = conn_id_len; + err = sendmsg(self->sfd, &msg, 0); + +QUIC Tx offload in kernel will read the data from userspace, encrypt and +copy it to the ciphertext within the same operation. + + +Sending QUIC application data with GSO +-------------------------------------- +When GSO is in use, the kernel will use the GSO fragment size as the target +for ciphertext. The packets from the user space should align on the boundary +of GSO fragment size minus the size of the tag for the chosen cipher. For the +GSO fragment 1200, the plain packets should follow each other at every 1184 +bytes, given the tag size of 16. After the encryption, the rest of the UDP +and IP stacks will follow the defined value of GSO fragment which will include +the trailing tag bytes. + +To set up GSO fragmentation: + +.. code-block:: c + + setsockopt(self->sfd, SOL_UDP, UDP_SEGMENT, &frag_size, + sizeof(frag_size)); + +If the GSO fragment size is provided in ancillary data within the sendmsg() +call, the value in ancillary data will take precedence over the segment size +provided in setsockopt to split the payload into packets. This is consistent +with the UDP stack behavior. + +Integrating to userspace QUIC libraries +--------------------------------------- + +Userspace QUIC libraries integration would depend on the implementation of the +QUIC protocol. For MVFST library, the control plane is integrated into the +handshake callbacks to properly configure the flows into the socket; and the +data plane is integrated into the methods that perform encryption and send +the packets to the batch scheduler for transmissions to the socket. + +MVFST library can be found at https://github.com/facebookincubator/mvfst. + +Statistics +========== + +QUIC Tx offload to the kernel has counters +(``/proc/net/quic_stat``): + +- ``QuicCurrTxSw`` - + number of currently active kernel offloaded QUIC connections +- ``QuicTxSw`` - + accumulative total number of offloaded QUIC connections +- ``QuicTxSwError`` - + accumulative total number of errors during QUIC Tx offload to kernel

Define control and data plane structures to pass in control plane for flow add/remove and during packet send within ancillary data. Define constants to use within SOL_UDP to program QUIC sockets.

Signed-off-by: Adel Abouchaev adel.abushaev@gmail.com --- include/uapi/linux/quic.h | 60 +++++++++++++++++++++++++++++++++++++++ include/uapi/linux/udp.h | 3 ++ 2 files changed, 63 insertions(+) create mode 100644 include/uapi/linux/quic.h

diff --git a/include/uapi/linux/quic.h b/include/uapi/linux/quic.h new file mode 100644 index 000000000000..38c54ff62d37 --- /dev/null +++ b/include/uapi/linux/quic.h @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) */ + +#ifndef _UAPI_LINUX_QUIC_H +#define _UAPI_LINUX_QUIC_H + +#include <linux/types.h> +#include <linux/tls.h> + +#define QUIC_MAX_CONNECTION_ID_SIZE 20 + +/* Side by side data for QUIC egress operations */ +#define QUIC_BYPASS_ENCRYPTION 0x01 + +struct quic_tx_ancillary_data { + __aligned_u64 next_pkt_num; + __u8 flags; + __u8 conn_id_length; +}; + +struct quic_connection_info_key { + __u8 conn_id[QUIC_MAX_CONNECTION_ID_SIZE]; + __u8 conn_id_length; +}; + +struct quic_aes_gcm_128 { + __u8 header_key[TLS_CIPHER_AES_GCM_128_KEY_SIZE]; + __u8 payload_key[TLS_CIPHER_AES_GCM_128_KEY_SIZE]; + __u8 payload_iv[TLS_CIPHER_AES_GCM_128_IV_SIZE]; +}; + +struct quic_aes_gcm_256 { + __u8 header_key[TLS_CIPHER_AES_GCM_256_KEY_SIZE]; + __u8 payload_key[TLS_CIPHER_AES_GCM_256_KEY_SIZE]; + __u8 payload_iv[TLS_CIPHER_AES_GCM_256_IV_SIZE]; +}; + +struct quic_aes_ccm_128 { + __u8 header_key[TLS_CIPHER_AES_CCM_128_KEY_SIZE]; + __u8 payload_key[TLS_CIPHER_AES_CCM_128_KEY_SIZE]; + __u8 payload_iv[TLS_CIPHER_AES_CCM_128_IV_SIZE]; +}; + +struct quic_chacha20_poly1305 { + __u8 header_key[TLS_CIPHER_CHACHA20_POLY1305_KEY_SIZE]; + __u8 payload_key[TLS_CIPHER_CHACHA20_POLY1305_KEY_SIZE]; + __u8 payload_iv[TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE]; +}; + +struct quic_connection_info { + __u16 cipher_type; + struct quic_connection_info_key key; + union { + struct quic_aes_gcm_128 aes_gcm_128; + struct quic_aes_gcm_256 aes_gcm_256; + struct quic_aes_ccm_128 aes_ccm_128; + struct quic_chacha20_poly1305 chacha20_poly1305; + }; +}; + +#endif diff --git a/include/uapi/linux/udp.h b/include/uapi/linux/udp.h index 4828794efcf8..0ee4c598e70b 100644 --- a/include/uapi/linux/udp.h +++ b/include/uapi/linux/udp.h @@ -34,6 +34,9 @@ struct udphdr { #define UDP_NO_CHECK6_RX 102 /* Disable accpeting checksum for UDP6 */ #define UDP_SEGMENT 103 /* Set GSO segmentation size */ #define UDP_GRO 104 /* This socket can receive UDP GRO packets */ +#define UDP_QUIC_ADD_TX_CONNECTION 106 /* Add QUIC Tx crypto offload */ +#define UDP_QUIC_DEL_TX_CONNECTION 107 /* Del QUIC Tx crypto offload */ +#define UDP_QUIC_ENCRYPT 108 /* QUIC encryption parameters */

/* UDP encapsulation types */ #define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */

Add connection hash to the context do support add, remove operations on QUIC connections for the control plane and lookup for the data plane. Implement setsockopt and add placeholders to add and delete Tx connections.

Signed-off-by: Adel Abouchaev adel.abushaev@gmail.com

---

Added net/quic/Kconfig reference to net/Kconfig in this commit.

Initialized pointers with NULL vs 0. Restricted AES counter to __le32 Added address space qualifiers to user space addresses. Removed empty lines. Updated code alignment. Removed inlines.

v3: removed ITER_KVEC flag from iov_iter_kvec call. v3: fixed Chacha20 encryption bug. --- include/net/quic.h | 53 ++ net/Kconfig | 1 + net/ipv4/udp.c | 9 + net/quic/Kconfig | 16 + net/quic/Makefile | 8 + net/quic/quic_main.c | 1371 ++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 1458 insertions(+) create mode 100644 include/net/quic.h create mode 100644 net/quic/Kconfig create mode 100644 net/quic/Makefile create mode 100644 net/quic/quic_main.c

diff --git a/include/net/quic.h b/include/net/quic.h new file mode 100644 index 000000000000..cafe01174e60 --- /dev/null +++ b/include/net/quic.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#ifndef INCLUDE_NET_QUIC_H +#define INCLUDE_NET_QUIC_H + +#include <linux/mutex.h> +#include <linux/rhashtable.h> +#include <linux/skmsg.h> +#include <uapi/linux/quic.h> + +#define QUIC_MAX_SHORT_HEADER_SIZE 25 +#define QUIC_MAX_CONNECTION_ID_SIZE 20 +#define QUIC_HDR_MASK_SIZE 16 +#define QUIC_MAX_GSO_FRAGS 16 + +// Maximum IV and nonce sizes should be in sync with supported ciphers. +#define QUIC_CIPHER_MAX_IV_SIZE 12 +#define QUIC_CIPHER_MAX_NONCE_SIZE 16 + +/* Side by side data for QUIC egress operations */ +#define QUIC_ANCILLARY_FLAGS (QUIC_BYPASS_ENCRYPTION) + +#define QUIC_MAX_IOVEC_SEGMENTS 8 +#define QUIC_MAX_SG_ALLOC_ELEMENTS 32 +#define QUIC_MAX_PLAIN_PAGES 16 +#define QUIC_MAX_CIPHER_PAGES_ORDER 4 + +struct quic_internal_crypto_context { + struct quic_connection_info conn_info; + struct crypto_skcipher *header_tfm; + struct crypto_aead *packet_aead; +}; + +struct quic_connection_rhash { + struct rhash_head node; + struct quic_internal_crypto_context crypto_ctx; + struct rcu_head rcu; +}; + +struct quic_context { + struct proto *sk_proto; + struct rhashtable tx_connections; + struct scatterlist sg_alloc[QUIC_MAX_SG_ALLOC_ELEMENTS]; + struct page *cipher_page; + /** + * To synchronize concurrent sendmsg() requests through the same socket + * and protect preallocated per-context memory. + **/ + struct mutex sendmsg_mux; + struct rcu_head rcu; +}; + +#endif diff --git a/net/Kconfig b/net/Kconfig index 6b78f695caa6..93e3b1308aec 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -63,6 +63,7 @@ menu "Networking options" source "net/packet/Kconfig" source "net/unix/Kconfig" source "net/tls/Kconfig" +source "net/quic/Kconfig" source "net/xfrm/Kconfig" source "net/iucv/Kconfig" source "net/smc/Kconfig" diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 027c4513a9cd..e7cbbea9d8d9 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -113,6 +113,7 @@ #include <net/sock_reuseport.h> #include <net/addrconf.h> #include <net/udp_tunnel.h> +#include <uapi/linux/quic.h> #if IS_ENABLED(CONFIG_IPV6) #include <net/ipv6_stubs.h> #endif @@ -1011,6 +1012,14 @@ static int __udp_cmsg_send(struct cmsghdr *cmsg, u16 *gso_size) return -EINVAL; *gso_size = *(__u16 *)CMSG_DATA(cmsg); return 0; + case UDP_QUIC_ENCRYPT: + /* This option is handled in UDP_ULP and is only checked + * here for the bypass bit + */ + if (cmsg->cmsg_len != + CMSG_LEN(sizeof(struct quic_tx_ancillary_data))) + return -EINVAL; + return 0; default: return -EINVAL; } diff --git a/net/quic/Kconfig b/net/quic/Kconfig new file mode 100644 index 000000000000..661cb989508a --- /dev/null +++ b/net/quic/Kconfig @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# QUIC configuration +# +config QUIC + tristate "QUIC encryption offload" + depends on INET + select CRYPTO + select CRYPTO_AES + select CRYPTO_GCM + help + Enable kernel support for QUIC crypto offload. Currently only TX + encryption offload is supported. The kernel will perform + copy-during-encryption. + + If unsure, say N. diff --git a/net/quic/Makefile b/net/quic/Makefile new file mode 100644 index 000000000000..928239c4d08c --- /dev/null +++ b/net/quic/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for the QUIC subsystem +# + +obj-$(CONFIG_QUIC) += quic.o + +quic-y := quic_main.o diff --git a/net/quic/quic_main.c b/net/quic/quic_main.c new file mode 100644 index 000000000000..95de3a961479 --- /dev/null +++ b/net/quic/quic_main.c @@ -0,0 +1,1371 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <crypto/skcipher.h> +#include <linux/bug.h> +#include <linux/module.h> +#include <linux/rhashtable.h> +// Include header to use TLS constants for AEAD cipher. +#include <net/tls.h> +#include <net/quic.h> +#include <net/udp.h> +#include <uapi/linux/quic.h> + +static unsigned long af_init_done; +static struct proto quic_v4_proto; +static struct proto quic_v6_proto; +static DEFINE_SPINLOCK(quic_proto_lock); + +static u32 quic_tx_connection_hash(const void *data, u32 len, u32 seed) +{ + return jhash(data, len, seed); +} + +static u32 quic_tx_connection_hash_obj(const void *data, u32 len, u32 seed) +{ + const struct quic_connection_rhash *connhash = data; + + return jhash(&connhash->crypto_ctx.conn_info.key, + sizeof(struct quic_connection_info_key), seed); +} + +static int quic_tx_connection_hash_cmp(struct rhashtable_compare_arg *arg, + const void *ptr) +{ + const struct quic_connection_info_key *key = arg->key; + const struct quic_connection_rhash *x = ptr; + + return !!memcmp(&x->crypto_ctx.conn_info.key, + key, + sizeof(struct quic_connection_info_key)); +} + +static const struct rhashtable_params quic_tx_connection_params = { + .key_len = sizeof(struct quic_connection_info_key), + .head_offset = offsetof(struct quic_connection_rhash, node), + .hashfn = quic_tx_connection_hash, + .obj_hashfn = quic_tx_connection_hash_obj, + .obj_cmpfn = quic_tx_connection_hash_cmp, + .automatic_shrinking = true, +}; + +static size_t quic_crypto_key_size(u16 cipher_type) +{ + switch (cipher_type) { + case TLS_CIPHER_AES_GCM_128: + return TLS_CIPHER_AES_GCM_128_KEY_SIZE; + case TLS_CIPHER_AES_GCM_256: + return TLS_CIPHER_AES_GCM_256_KEY_SIZE; + case TLS_CIPHER_AES_CCM_128: + return TLS_CIPHER_AES_CCM_128_KEY_SIZE; + case TLS_CIPHER_CHACHA20_POLY1305: + return TLS_CIPHER_CHACHA20_POLY1305_KEY_SIZE; + default: + break; + } + WARN_ON("Unsupported cipher type"); + return 0; +} + +static size_t quic_crypto_tag_size(u16 cipher_type) +{ + switch (cipher_type) { + case TLS_CIPHER_AES_GCM_128: + return TLS_CIPHER_AES_GCM_128_TAG_SIZE; + case TLS_CIPHER_AES_GCM_256: + return TLS_CIPHER_AES_GCM_256_TAG_SIZE; + case TLS_CIPHER_AES_CCM_128: + return TLS_CIPHER_AES_CCM_128_TAG_SIZE; + case TLS_CIPHER_CHACHA20_POLY1305: + return TLS_CIPHER_CHACHA20_POLY1305_TAG_SIZE; + default: + break; + } + WARN_ON("Unsupported cipher type"); + return 0; +} + +static size_t quic_crypto_nonce_size(u16 cipher_type) +{ + switch (cipher_type) { + case TLS_CIPHER_AES_GCM_128: + BUILD_BUG_ON(TLS_CIPHER_AES_GCM_128_IV_SIZE + + TLS_CIPHER_AES_GCM_128_SALT_SIZE > + QUIC_CIPHER_MAX_NONCE_SIZE); + return TLS_CIPHER_AES_GCM_128_IV_SIZE + + TLS_CIPHER_AES_GCM_128_SALT_SIZE; + case TLS_CIPHER_AES_GCM_256: + BUILD_BUG_ON(TLS_CIPHER_AES_GCM_256_IV_SIZE + + TLS_CIPHER_AES_GCM_256_SALT_SIZE > + QUIC_CIPHER_MAX_NONCE_SIZE); + return TLS_CIPHER_AES_GCM_256_IV_SIZE + + TLS_CIPHER_AES_GCM_256_SALT_SIZE; + case TLS_CIPHER_AES_CCM_128: + BUILD_BUG_ON(TLS_CIPHER_AES_CCM_128_IV_SIZE + + TLS_CIPHER_AES_CCM_128_SALT_SIZE > + QUIC_CIPHER_MAX_NONCE_SIZE); + return TLS_CIPHER_AES_CCM_128_IV_SIZE + + TLS_CIPHER_AES_CCM_128_SALT_SIZE; + case TLS_CIPHER_CHACHA20_POLY1305: + BUILD_BUG_ON(TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE + + TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE > + QUIC_CIPHER_MAX_NONCE_SIZE); + return TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE + + TLS_CIPHER_CHACHA20_POLY1305_SALT_SIZE; + default: + break; + } + WARN_ON("Unsupported cipher type"); + return 0; +} + +static u8 *quic_payload_iv(struct quic_internal_crypto_context *crypto_ctx) +{ + switch (crypto_ctx->conn_info.cipher_type) { + case TLS_CIPHER_AES_GCM_128: + return crypto_ctx->conn_info.aes_gcm_128.payload_iv; + case TLS_CIPHER_AES_GCM_256: + return crypto_ctx->conn_info.aes_gcm_256.payload_iv; + case TLS_CIPHER_AES_CCM_128: + return crypto_ctx->conn_info.aes_ccm_128.payload_iv; + case TLS_CIPHER_CHACHA20_POLY1305: + return crypto_ctx->conn_info.chacha20_poly1305.payload_iv; + default: + break; + } + WARN_ON("Unsupported cipher type"); + return NULL; +} + +static int +quic_config_header_crypto(struct quic_internal_crypto_context *crypto_ctx) +{ + struct crypto_skcipher *tfm; + char *header_cipher; + int rc = 0; + char *key; + + switch (crypto_ctx->conn_info.cipher_type) { + case TLS_CIPHER_AES_GCM_128: + header_cipher = "ecb(aes)"; + key = crypto_ctx->conn_info.aes_gcm_128.header_key; + break; + case TLS_CIPHER_AES_GCM_256: + header_cipher = "ecb(aes)"; + key = crypto_ctx->conn_info.aes_gcm_256.header_key; + break; + case TLS_CIPHER_AES_CCM_128: + header_cipher = "ecb(aes)"; + key = crypto_ctx->conn_info.aes_ccm_128.header_key; + break; + case TLS_CIPHER_CHACHA20_POLY1305: + header_cipher = "chacha20"; + key = crypto_ctx->conn_info.chacha20_poly1305.header_key; + break; + default: + rc = -EINVAL; + goto out; + } + + tfm = crypto_alloc_skcipher(header_cipher, 0, 0); + if (IS_ERR(tfm)) { + rc = PTR_ERR(tfm); + goto out; + } + + rc = crypto_skcipher_setkey(tfm, key, + quic_crypto_key_size(crypto_ctx->conn_info + .cipher_type)); + if (rc) { + crypto_free_skcipher(tfm); + goto out; + } + + crypto_ctx->header_tfm = tfm; + +out: + return rc; +} + +static int +quic_config_packet_crypto(struct quic_internal_crypto_context *crypto_ctx) +{ + struct crypto_aead *aead; + char *cipher_name; + int rc = 0; + char *key; + + switch (crypto_ctx->conn_info.cipher_type) { + case TLS_CIPHER_AES_GCM_128: { + key = crypto_ctx->conn_info.aes_gcm_128.payload_key; + cipher_name = "gcm(aes)"; + break; + } + case TLS_CIPHER_AES_GCM_256: { + key = crypto_ctx->conn_info.aes_gcm_256.payload_key; + cipher_name = "gcm(aes)"; + break; + } + case TLS_CIPHER_AES_CCM_128: { + key = crypto_ctx->conn_info.aes_ccm_128.payload_key; + cipher_name = "ccm(aes)"; + break; + } + case TLS_CIPHER_CHACHA20_POLY1305: { + key = crypto_ctx->conn_info.chacha20_poly1305.payload_key; + cipher_name = "rfc7539(chacha20,poly1305)"; + break; + } + default: + rc = -EINVAL; + goto out; + } + + aead = crypto_alloc_aead(cipher_name, 0, 0); + if (IS_ERR(aead)) { + rc = PTR_ERR(aead); + goto out; + } + + rc = crypto_aead_setkey(aead, key, + quic_crypto_key_size(crypto_ctx->conn_info + .cipher_type)); + if (rc) + goto free_aead; + + rc = crypto_aead_setauthsize(aead, + quic_crypto_tag_size(crypto_ctx->conn_info + .cipher_type)); + if (rc) + goto free_aead; + + crypto_ctx->packet_aead = aead; + goto out; + +free_aead: + crypto_free_aead(aead); + +out: + return rc; +} + +static inline struct quic_context *quic_get_ctx(struct sock *sk) +{ + struct inet_sock *inet = inet_sk(sk); + + return (__force void *)rcu_access_pointer(inet->ulp_data); +} + +static void quic_free_cipher_page(struct page *page) +{ + __free_pages(page, QUIC_MAX_CIPHER_PAGES_ORDER); +} + +static struct quic_context *quic_ctx_create(void) +{ + struct quic_context *ctx; + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return NULL; + + mutex_init(&ctx->sendmsg_mux); + ctx->cipher_page = alloc_pages(GFP_KERNEL, QUIC_MAX_CIPHER_PAGES_ORDER); + if (!ctx->cipher_page) + goto out_err; + + if (rhashtable_init(&ctx->tx_connections, + &quic_tx_connection_params) < 0) { + quic_free_cipher_page(ctx->cipher_page); + goto out_err; + } + + return ctx; + +out_err: + kfree(ctx); + return NULL; +} + +static int quic_getsockopt(struct sock *sk, int level, int optname, + char __user *optval, int __user *optlen) +{ + struct quic_context *ctx = quic_get_ctx(sk); + + return ctx->sk_proto->getsockopt(sk, level, optname, optval, optlen); +} + +static int do_quic_conn_add_tx(struct sock *sk, sockptr_t optval, + unsigned int optlen) +{ + struct quic_internal_crypto_context *crypto_ctx; + struct quic_context *ctx = quic_get_ctx(sk); + struct quic_connection_rhash *connhash; + int rc = 0; + + if (sockptr_is_null(optval)) + return -EINVAL; + + if (optlen != sizeof(struct quic_connection_info)) + return -EINVAL; + + connhash = kzalloc(sizeof(*connhash), GFP_KERNEL); + if (!connhash) + return -EFAULT; + + crypto_ctx = &connhash->crypto_ctx; + rc = copy_from_sockptr(&crypto_ctx->conn_info, optval, + sizeof(crypto_ctx->conn_info)); + if (rc) { + rc = -EFAULT; + goto err_crypto_info; + } + + // create all TLS materials for packet and header decryption + rc = quic_config_header_crypto(crypto_ctx); + if (rc) + goto err_crypto_info; + + rc = quic_config_packet_crypto(crypto_ctx); + if (rc) + goto err_free_skcipher; + + // insert crypto data into hash per connection ID + rc = rhashtable_insert_fast(&ctx->tx_connections, &connhash->node, + quic_tx_connection_params); + if (rc < 0) + goto err_free_ciphers; + + return 0; + +err_free_ciphers: + crypto_free_aead(crypto_ctx->packet_aead); + +err_free_skcipher: + crypto_free_skcipher(crypto_ctx->header_tfm); + +err_crypto_info: + // wipeout all crypto materials; + memzero_explicit(&connhash->crypto_ctx, sizeof(connhash->crypto_ctx)); + kfree(connhash); + return rc; +} + +static int do_quic_conn_del_tx(struct sock *sk, sockptr_t optval, + unsigned int optlen) +{ + struct quic_internal_crypto_context *crypto_ctx; + struct quic_context *ctx = quic_get_ctx(sk); + struct quic_connection_rhash *connhash; + struct quic_connection_info conn_info; + + if (sockptr_is_null(optval)) + return -EINVAL; + + if (optlen != sizeof(struct quic_connection_info)) + return -EINVAL; + + if (copy_from_sockptr(&conn_info, optval, optlen)) + return -EFAULT; + + connhash = rhashtable_lookup_fast(&ctx->tx_connections, + &conn_info.key, + quic_tx_connection_params); + if (!connhash) + return -EINVAL; + + rhashtable_remove_fast(&ctx->tx_connections, + &connhash->node, + quic_tx_connection_params); + + crypto_ctx = &connhash->crypto_ctx; + + crypto_free_skcipher(crypto_ctx->header_tfm); + crypto_free_aead(crypto_ctx->packet_aead); + memzero_explicit(crypto_ctx, sizeof(*crypto_ctx)); + kfree(connhash); + + return 0; +} + +static int do_quic_setsockopt(struct sock *sk, int optname, sockptr_t optval, + unsigned int optlen) +{ + int rc = 0; + + switch (optname) { + case UDP_QUIC_ADD_TX_CONNECTION: + lock_sock(sk); + rc = do_quic_conn_add_tx(sk, optval, optlen); + release_sock(sk); + break; + case UDP_QUIC_DEL_TX_CONNECTION: + lock_sock(sk); + rc = do_quic_conn_del_tx(sk, optval, optlen); + release_sock(sk); + break; + default: + rc = -ENOPROTOOPT; + break; + } + + return rc; +} + +static int quic_setsockopt(struct sock *sk, int level, int optname, + sockptr_t optval, unsigned int optlen) +{ + struct quic_context *ctx; + struct proto *sk_proto; + + rcu_read_lock(); + ctx = quic_get_ctx(sk); + sk_proto = ctx->sk_proto; + rcu_read_unlock(); + + if (level == SOL_UDP && + (optname == UDP_QUIC_ADD_TX_CONNECTION || + optname == UDP_QUIC_DEL_TX_CONNECTION)) + return do_quic_setsockopt(sk, optname, optval, optlen); + + return sk_proto->setsockopt(sk, level, optname, optval, optlen); +} + +static int +quic_extract_ancillary_data(struct msghdr *msg, + struct quic_tx_ancillary_data *ancillary_data, + u16 *udp_pkt_size) +{ + struct cmsghdr *cmsg_hdr = NULL; + void *ancillary_data_ptr = NULL; + + if (!msg->msg_controllen) + return -EINVAL; + + for_each_cmsghdr(cmsg_hdr, msg) { + if (!CMSG_OK(msg, cmsg_hdr)) + return -EINVAL; + + if (cmsg_hdr->cmsg_level != IPPROTO_UDP) + continue; + + if (cmsg_hdr->cmsg_type == UDP_QUIC_ENCRYPT) { + if (cmsg_hdr->cmsg_len != + CMSG_LEN(sizeof(struct quic_tx_ancillary_data))) + return -EINVAL; + memcpy((void *)ancillary_data, CMSG_DATA(cmsg_hdr), + sizeof(struct quic_tx_ancillary_data)); + ancillary_data_ptr = cmsg_hdr; + } else if (cmsg_hdr->cmsg_type == UDP_SEGMENT) { + if (cmsg_hdr->cmsg_len != CMSG_LEN(sizeof(u16))) + return -EINVAL; + memcpy((void *)udp_pkt_size, CMSG_DATA(cmsg_hdr), + sizeof(u16)); + } + } + + if (!ancillary_data_ptr) + return -EINVAL; + + return 0; +} + +static int quic_sendmsg_validate(struct msghdr *msg) +{ + if (!iter_is_iovec(&msg->msg_iter)) + return -EINVAL; + + if (!msg->msg_controllen) + return -EINVAL; + + return 0; +} + +static struct quic_connection_rhash +*quic_lookup_connection(struct quic_context *ctx, + u8 *conn_id, + struct quic_tx_ancillary_data *ancillary_data) +{ + struct quic_connection_info_key conn_key; + + // Lookup connection information by the connection key. + memset(&conn_key, 0, sizeof(struct quic_connection_info_key)); + // fill the connection id up to the max connection ID length + if (ancillary_data->conn_id_length > QUIC_MAX_CONNECTION_ID_SIZE) + return NULL; + + conn_key.conn_id_length = ancillary_data->conn_id_length; + if (ancillary_data->conn_id_length) + memcpy(conn_key.conn_id, + conn_id, + ancillary_data->conn_id_length); + return rhashtable_lookup_fast(&ctx->tx_connections, + &conn_key, + quic_tx_connection_params); +} + +static int quic_sg_capacity_from_msg(const size_t pkt_size, + const off_t offset, + const size_t length) +{ + size_t pages = 0; + size_t pkts = 0; + + pages = DIV_ROUND_UP(offset + length, PAGE_SIZE); + pkts = DIV_ROUND_UP(length, pkt_size); + return pages + pkts + 1; +} + +static void quic_put_plain_user_pages(struct page **pages, size_t nr_pages) +{ + int i; + + for (i = 0; i < nr_pages; ++i) + if (i == 0 || pages[i] != pages[i - 1]) + put_page(pages[i]); +} + +static int quic_get_plain_user_pages(struct msghdr * const msg, + struct page **pages, + int *page_indices) +{ + size_t nr_mapped = 0; + size_t nr_pages = 0; + void __user *data_addr; + void *page_addr; + size_t count = 0; + off_t data_off; + int ret = 0; + int i; + + for (i = 0; i < msg->msg_iter.nr_segs; ++i) { + data_addr = msg->msg_iter.iov[i].iov_base; + if (!i) + data_addr += msg->msg_iter.iov_offset; + page_addr = + (void *)((unsigned long)data_addr & PAGE_MASK); + + data_off = (unsigned long)data_addr & ~PAGE_MASK; + nr_pages = + DIV_ROUND_UP(data_off + msg->msg_iter.iov[i].iov_len, + PAGE_SIZE); + if (nr_mapped + nr_pages > QUIC_MAX_PLAIN_PAGES) { + quic_put_plain_user_pages(pages, nr_mapped); + ret = -ENOMEM; + goto out; + } + + count = get_user_pages((unsigned long)page_addr, nr_pages, 1, + pages, NULL); + if (count < nr_pages) { + quic_put_plain_user_pages(pages, nr_mapped + count); + ret = -ENOMEM; + goto out; + } + + page_indices[i] = nr_mapped; + nr_mapped += count; + pages += count; + } + ret = nr_mapped; + +out: + return ret; +} + +static int quic_sg_plain_from_mapped_msg(struct msghdr * const msg, + struct page **plain_pages, + void **iov_base_ptrs, + void **iov_data_ptrs, + const size_t plain_size, + const size_t pkt_size, + struct scatterlist * const sg_alloc, + const size_t max_sg_alloc, + struct scatterlist ** const sg_pkts, + size_t *nr_plain_pages) +{ + int iov_page_indices[QUIC_MAX_IOVEC_SEGMENTS]; + struct scatterlist *sg; + unsigned int pkt_i = 0; + ssize_t left_on_page; + size_t pkt_left; + unsigned int i; + size_t seg_len; + off_t page_ofs; + off_t seg_ofs; + int ret = 0; + int page_i; + + if (msg->msg_iter.nr_segs >= QUIC_MAX_IOVEC_SEGMENTS) { + ret = -ENOMEM; + goto out; + } + + ret = quic_get_plain_user_pages(msg, plain_pages, iov_page_indices); + if (ret < 0) + goto out; + + *nr_plain_pages = ret; + sg = sg_alloc; + sg_pkts[pkt_i] = sg; + sg_unmark_end(sg); + pkt_left = pkt_size; + for (i = 0; i < msg->msg_iter.nr_segs; ++i) { + page_ofs = ((unsigned long)msg->msg_iter.iov[i].iov_base + & (PAGE_SIZE - 1)); + page_i = 0; + if (!i) { + page_ofs += msg->msg_iter.iov_offset; + while (page_ofs >= PAGE_SIZE) { + page_ofs -= PAGE_SIZE; + page_i++; + } + } + + seg_len = msg->msg_iter.iov[i].iov_len; + page_i += iov_page_indices[i]; + + if (page_i >= QUIC_MAX_PLAIN_PAGES) + return -EFAULT; + + seg_ofs = 0; + while (seg_ofs < seg_len) { + if (sg - sg_alloc > max_sg_alloc) + return -EFAULT; + + sg_unmark_end(sg); + left_on_page = min_t(size_t, PAGE_SIZE - page_ofs, + seg_len - seg_ofs); + if (left_on_page <= 0) + return -EFAULT; + + if (left_on_page > pkt_left) { + sg_set_page(sg, plain_pages[page_i], pkt_left, + page_ofs); + pkt_i++; + seg_ofs += pkt_left; + page_ofs += pkt_left; + sg_mark_end(sg); + sg++; + sg_pkts[pkt_i] = sg; + pkt_left = pkt_size; + continue; + } + sg_set_page(sg, plain_pages[page_i], left_on_page, + page_ofs); + page_i++; + page_ofs = 0; + seg_ofs += left_on_page; + pkt_left -= left_on_page; + if (pkt_left == 0 || + (seg_ofs == seg_len && + i == msg->msg_iter.nr_segs - 1)) { + sg_mark_end(sg); + pkt_i++; + sg++; + sg_pkts[pkt_i] = sg; + pkt_left = pkt_size; + } else { + sg++; + } + } + } + + if (pkt_left && pkt_left != pkt_size) { + pkt_i++; + sg_mark_end(sg); + } + ret = pkt_i; + +out: + return ret; +} + +/* sg_alloc: allocated zeroed array of scatterlists + * cipher_page: preallocated compound page + */ +static int quic_sg_cipher_from_pkts(const size_t cipher_tag_size, + const size_t plain_pkt_size, + const size_t plain_size, + struct page * const cipher_page, + struct scatterlist * const sg_alloc, + const size_t nr_sg_alloc, + struct scatterlist ** const sg_cipher) +{ + const size_t cipher_pkt_size = plain_pkt_size + cipher_tag_size; + size_t pkts = DIV_ROUND_UP(plain_size, plain_pkt_size); + struct scatterlist *sg = sg_alloc; + int pkt_i; + void *ptr; + + if (pkts > nr_sg_alloc) + return -EINVAL; + + ptr = page_address(cipher_page); + for (pkt_i = 0; pkt_i < pkts; + ++pkt_i, ptr += cipher_pkt_size, ++sg) { + sg_set_buf(sg, ptr, cipher_pkt_size); + sg_mark_end(sg); + sg_cipher[pkt_i] = sg; + } + return pkts; +} + +/* fast copy from scatterlist to a buffer assuming that all pages are + * available in kernel memory. + */ +static int quic_sg_pcopy_to_buffer_kernel(struct scatterlist *sg, + u8 *buffer, + size_t bytes_to_copy, + off_t offset_to_read) +{ + off_t sg_remain = sg->length; + size_t to_copy; + + if (!bytes_to_copy) + return 0; + + // skip to offset first + while (offset_to_read > 0) { + if (!sg_remain) + return -EINVAL; + if (offset_to_read < sg_remain) { + sg_remain -= offset_to_read; + break; + } + offset_to_read -= sg_remain; + sg = sg_next(sg); + if (!sg) + return -EINVAL; + sg_remain = sg->length; + } + + // traverse sg list from offset to offset + bytes_to_copy + while (bytes_to_copy) { + to_copy = min_t(size_t, bytes_to_copy, sg_remain); + if (!to_copy) + return -EINVAL; + memcpy(buffer, sg_virt(sg) + (sg->length - sg_remain), to_copy); + buffer += to_copy; + bytes_to_copy -= to_copy; + if (bytes_to_copy) { + sg = sg_next(sg); + if (!sg) + return -EINVAL; + sg_remain = sg->length; + } + } + + return 0; +} + +static int quic_copy_header(struct scatterlist *sg_plain, + u8 *buf, const size_t buf_len, + const size_t conn_id_len) +{ + u8 *pkt = sg_virt(sg_plain); + size_t hdr_len; + + hdr_len = 1 + conn_id_len + ((*pkt & 0x03) + 1); + if (hdr_len > QUIC_MAX_SHORT_HEADER_SIZE || hdr_len > buf_len) + return -EINVAL; + + WARN_ON_ONCE(quic_sg_pcopy_to_buffer_kernel(sg_plain, buf, hdr_len, 0)); + return hdr_len; +} + +static u64 quic_unpack_pkt_num(struct quic_tx_ancillary_data * const control, + const u8 * const hdr, + const off_t payload_crypto_off) +{ + u64 truncated_pn = 0; + u64 candidate_pn; + u64 expected_pn; + u64 pn_hwin; + u64 pn_mask; + u64 pn_len; + u64 pn_win; + int i; + + pn_len = (hdr[0] & 0x03) + 1; + expected_pn = control->next_pkt_num; + + for (i = 1 + control->conn_id_length; i < payload_crypto_off; ++i) { + truncated_pn <<= 8; + truncated_pn |= hdr[i]; + } + + pn_win = 1ULL << (pn_len << 3); + pn_hwin = pn_win >> 1; + pn_mask = pn_win - 1; + candidate_pn = (expected_pn & ~pn_mask) | truncated_pn; + + if (expected_pn > pn_hwin && + candidate_pn <= expected_pn - pn_hwin && + candidate_pn < (1ULL << 62) - pn_win) + return candidate_pn + pn_win; + + if (candidate_pn > expected_pn + pn_hwin && + candidate_pn >= pn_win) + return candidate_pn - pn_win; + + return candidate_pn; +} + +static int +quic_construct_header_prot_mask(struct quic_internal_crypto_context *crypto_ctx, + struct skcipher_request *hdr_mask_req, + struct scatterlist *sg_cipher_pkt, + off_t sample_offset, + u8 *hdr_mask) +{ + u8 *sample = sg_virt(sg_cipher_pkt) + sample_offset; + u8 hdr_ctr[sizeof(u32) + QUIC_CIPHER_MAX_IV_SIZE]; + u8 chacha20_zeros[5] = {0, 0, 0, 0, 0}; + struct scatterlist sg_cipher_sample; + struct scatterlist sg_hdr_mask; + struct crypto_wait wait_header; + __le32 counter; + + BUILD_BUG_ON(QUIC_HDR_MASK_SIZE + < sizeof(u32) + QUIC_CIPHER_MAX_IV_SIZE); + + sg_init_one(&sg_hdr_mask, hdr_mask, QUIC_HDR_MASK_SIZE); + skcipher_request_set_callback(hdr_mask_req, 0, crypto_req_done, + &wait_header); + + if (crypto_ctx->conn_info.cipher_type == TLS_CIPHER_CHACHA20_POLY1305) { + sg_init_one(&sg_cipher_sample, (u8 *)chacha20_zeros, + sizeof(chacha20_zeros)); + counter = cpu_to_le32(*((u32 *)sample)); + memset(hdr_ctr, 0, sizeof(hdr_ctr)); + memcpy((u8 *)hdr_ctr, (u8 *)&counter, sizeof(u32)); + memcpy((u8 *)hdr_ctr + sizeof(u32), + (sample + sizeof(u32)), + QUIC_CIPHER_MAX_IV_SIZE); + skcipher_request_set_crypt(hdr_mask_req, &sg_cipher_sample, + &sg_hdr_mask, 5, hdr_ctr); + } else { + // cipher pages are continuous, get the pointer to the sg data + // directly, pages are allocated in kernel + sg_init_one(&sg_cipher_sample, sample, QUIC_HDR_MASK_SIZE); + skcipher_request_set_crypt(hdr_mask_req, &sg_cipher_sample, + &sg_hdr_mask, QUIC_HDR_MASK_SIZE, + NULL); + } + + return crypto_wait_req(crypto_skcipher_encrypt(hdr_mask_req), + &wait_header); +} + +static int quic_protect_header(struct quic_internal_crypto_context *crypto_ctx, + struct quic_tx_ancillary_data *control, + struct skcipher_request *hdr_mask_req, + struct scatterlist *sg_cipher_pkt, + int payload_crypto_off) +{ + u8 hdr_mask[QUIC_HDR_MASK_SIZE]; + off_t quic_pkt_num_off; + u8 quic_pkt_num_len; + u8 *cipher_hdr; + int err; + int i; + + quic_pkt_num_off = 1 + control->conn_id_length; + quic_pkt_num_len = payload_crypto_off - quic_pkt_num_off; + + if (quic_pkt_num_len > 4) + return -EPERM; + + err = quic_construct_header_prot_mask(crypto_ctx, hdr_mask_req, + sg_cipher_pkt, + payload_crypto_off + + (4 - quic_pkt_num_len), + hdr_mask); + if (unlikely(err)) + return err; + + cipher_hdr = sg_virt(sg_cipher_pkt); + // protect the public flags + cipher_hdr[0] ^= (hdr_mask[0] & 0x1f); + + for (i = 0; i < quic_pkt_num_len; ++i) + cipher_hdr[quic_pkt_num_off + i] ^= hdr_mask[1 + i]; + + return 0; +} + +static +void quic_construct_ietf_nonce(u8 *nonce, + struct quic_internal_crypto_context *crypto_ctx, + u64 quic_pkt_num) +{ + u8 *iv = quic_payload_iv(crypto_ctx); + int i; + + for (i = quic_crypto_nonce_size(crypto_ctx->conn_info.cipher_type) - 1; + i >= 0 && quic_pkt_num; + --i, quic_pkt_num >>= 8) + nonce[i] = iv[i] ^ (u8)quic_pkt_num; + + for (; i >= 0; --i) + nonce[i] = iv[i]; +} + +static ssize_t quic_sendpage(struct quic_context *ctx, + struct sock *sk, + struct msghdr *msg, + const size_t cipher_size, + struct page * const cipher_page) +{ + struct kvec iov; + ssize_t ret; + + iov.iov_base = page_address(cipher_page); + iov.iov_len = cipher_size; + iov_iter_kvec(&msg->msg_iter, WRITE, &iov, 1, cipher_size); + ret = security_socket_sendmsg(sk->sk_socket, msg, msg_data_left(msg)); + if (ret) + return ret; + + ret = ctx->sk_proto->sendmsg(sk, msg, msg_data_left(msg)); + WARN_ON(ret == -EIOCBQUEUED); + return ret; +} + +static int quic_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) +{ + struct quic_internal_crypto_context *crypto_ctx = NULL; + struct scatterlist *sg_cipher_pkts[QUIC_MAX_GSO_FRAGS]; + struct scatterlist *sg_plain_pkts[QUIC_MAX_GSO_FRAGS]; + struct page *plain_pages[QUIC_MAX_PLAIN_PAGES]; + void *plain_base_ptrs[QUIC_MAX_IOVEC_SEGMENTS]; + void *plain_data_ptrs[QUIC_MAX_IOVEC_SEGMENTS]; + struct msghdr msg_cipher = { + .msg_name = msg->msg_name, + .msg_namelen = msg->msg_namelen, + .msg_flags = msg->msg_flags, + .msg_control = msg->msg_control, + .msg_controllen = msg->msg_controllen, + }; + struct quic_connection_rhash *connhash = NULL; + struct quic_context *ctx = quic_get_ctx(sk); + u8 hdr_buf[QUIC_MAX_SHORT_HEADER_SIZE]; + struct skcipher_request *hdr_mask_req; + struct quic_tx_ancillary_data control; + u8 nonce[QUIC_CIPHER_MAX_NONCE_SIZE]; + struct aead_request *aead_req = NULL; + struct scatterlist *sg_cipher = NULL; + struct udp_sock *up = udp_sk(sk); + struct scatterlist *sg_plain = NULL; + u16 gso_pkt_size = up->gso_size; + size_t last_plain_pkt_size = 0; + off_t payload_crypto_offset; + struct crypto_aead *tfm = NULL; + size_t nr_plain_pages = 0; + struct crypto_wait waiter; + size_t nr_sg_cipher_pkts; + size_t nr_sg_plain_pkts; + ssize_t hdr_buf_len = 0; + size_t nr_sg_alloc = 0; + size_t plain_pkt_size; + u64 full_pkt_num; + size_t cipher_size; + size_t plain_size; + size_t pkt_size; + size_t tag_size; + int ret = 0; + int pkt_i; + int err; + + memset(&hdr_buf[0], 0, QUIC_MAX_SHORT_HEADER_SIZE); + hdr_buf_len = copy_from_iter(hdr_buf, QUIC_MAX_SHORT_HEADER_SIZE, + &msg->msg_iter); + if (hdr_buf_len <= 0) { + ret = -EINVAL; + goto out; + } + iov_iter_revert(&msg->msg_iter, hdr_buf_len); + + ctx = quic_get_ctx(sk); + + // Bypass for anything that is guaranteed not QUIC. + plain_size = len; + + if (plain_size < 2) + return ctx->sk_proto->sendmsg(sk, msg, len); + + // Bypass for other than short header. + if ((hdr_buf[0] & 0xc0) != 0x40) + return ctx->sk_proto->sendmsg(sk, msg, len); + + // Crypto adds a tag after the packet. Corking a payload would produce + // a crypto tag after each portion. Use GSO instead. + if ((msg->msg_flags & MSG_MORE) || up->pending) { + ret = -EINVAL; + goto out; + } + + ret = quic_sendmsg_validate(msg); + if (ret) + goto out; + + ret = quic_extract_ancillary_data(msg, &control, &gso_pkt_size); + if (ret) + goto out; + + // Reserved bits with ancillary data present are an error. + if (control.flags & ~QUIC_ANCILLARY_FLAGS) { + ret = -EINVAL; + goto out; + } + + // Bypass offload on request. First packet bypass applies to all + // packets in the GSO pack. + if (control.flags & QUIC_BYPASS_ENCRYPTION) + return ctx->sk_proto->sendmsg(sk, msg, len); + + if (hdr_buf_len < 1 + control.conn_id_length) { + ret = -EINVAL; + goto out; + } + + // Fetch the flow + connhash = quic_lookup_connection(ctx, &hdr_buf[1], &control); + if (!connhash) { + ret = -EINVAL; + goto out; + } + + crypto_ctx = &connhash->crypto_ctx; + + tag_size = quic_crypto_tag_size(crypto_ctx->conn_info.cipher_type); + + // For GSO, use the GSO size minus cipher tag size as the packet size; + // for non-GSO, use the size of the whole plaintext. + // Reduce the packet size by tag size to keep the original packet size + // for the rest of the UDP path in the stack. + if (!gso_pkt_size) { + plain_pkt_size = plain_size; + } else { + if (gso_pkt_size < tag_size) + goto out; + + plain_pkt_size = gso_pkt_size - tag_size; + } + + // Build scatterlist from the input data, split by GSO minus the + // crypto tag size. + nr_sg_alloc = quic_sg_capacity_from_msg(plain_pkt_size, + msg->msg_iter.iov_offset, + plain_size); + if ((nr_sg_alloc * 2) >= QUIC_MAX_SG_ALLOC_ELEMENTS) { + ret = -ENOMEM; + goto out; + } + + sg_plain = ctx->sg_alloc; + sg_cipher = sg_plain + nr_sg_alloc; + + ret = quic_sg_plain_from_mapped_msg(msg, plain_pages, + plain_base_ptrs, + plain_data_ptrs, plain_size, + plain_pkt_size, sg_plain, + nr_sg_alloc, sg_plain_pkts, + &nr_plain_pages); + + if (ret < 0) + goto out; + + nr_sg_plain_pkts = ret; + last_plain_pkt_size = plain_size % plain_pkt_size; + if (!last_plain_pkt_size) + last_plain_pkt_size = plain_pkt_size; + + // Build scatterlist for the ciphertext, split by GSO. + cipher_size = plain_size + nr_sg_plain_pkts * tag_size; + + if (DIV_ROUND_UP(cipher_size, PAGE_SIZE) + >= (1 << QUIC_MAX_CIPHER_PAGES_ORDER)) { + ret = -ENOMEM; + goto out_put_pages; + } + + ret = quic_sg_cipher_from_pkts(tag_size, plain_pkt_size, plain_size, + ctx->cipher_page, sg_cipher, nr_sg_alloc, + sg_cipher_pkts); + if (ret < 0) + goto out_put_pages; + + nr_sg_cipher_pkts = ret; + + if (nr_sg_plain_pkts != nr_sg_cipher_pkts) { + ret = -EPERM; + goto out_put_pages; + } + + // Encrypt and protect header for each packet individually. + tfm = crypto_ctx->packet_aead; + crypto_aead_clear_flags(tfm, ~0); + aead_req = aead_request_alloc(tfm, GFP_KERNEL); + if (!aead_req) { + aead_request_free(aead_req); + ret = -ENOMEM; + goto out_put_pages; + } + + hdr_mask_req = skcipher_request_alloc(crypto_ctx->header_tfm, + GFP_KERNEL); + if (!hdr_mask_req) { + aead_request_free(aead_req); + ret = -ENOMEM; + goto out_put_pages; + } + + for (pkt_i = 0; pkt_i < nr_sg_plain_pkts; ++pkt_i) { + payload_crypto_offset = + quic_copy_header(sg_plain_pkts[pkt_i], + hdr_buf, + sizeof(hdr_buf), + control.conn_id_length); + + full_pkt_num = quic_unpack_pkt_num(&control, hdr_buf, + payload_crypto_offset); + + pkt_size = (pkt_i + 1 < nr_sg_plain_pkts + ? plain_pkt_size + : last_plain_pkt_size) + - payload_crypto_offset; + if (pkt_size < 0) { + aead_request_free(aead_req); + skcipher_request_free(hdr_mask_req); + ret = -EINVAL; + goto out_put_pages; + } + + /* Construct nonce and initialize request */ + quic_construct_ietf_nonce(nonce, crypto_ctx, full_pkt_num); + + /* Encrypt the body */ + aead_request_set_callback(aead_req, + CRYPTO_TFM_REQ_MAY_BACKLOG + | CRYPTO_TFM_REQ_MAY_SLEEP, + crypto_req_done, &waiter); + aead_request_set_crypt(aead_req, sg_plain_pkts[pkt_i], + sg_cipher_pkts[pkt_i], + pkt_size, + nonce); + aead_request_set_ad(aead_req, payload_crypto_offset); + err = crypto_wait_req(crypto_aead_encrypt(aead_req), &waiter); + if (unlikely(err)) { + ret = err; + aead_request_free(aead_req); + skcipher_request_free(hdr_mask_req); + goto out_put_pages; + } + + /* Protect the header */ + memcpy(sg_virt(sg_cipher_pkts[pkt_i]), hdr_buf, + payload_crypto_offset); + + err = quic_protect_header(crypto_ctx, &control, + hdr_mask_req, + sg_cipher_pkts[pkt_i], + payload_crypto_offset); + if (unlikely(err)) { + ret = err; + aead_request_free(aead_req); + skcipher_request_free(hdr_mask_req); + goto out_put_pages; + } + } + skcipher_request_free(hdr_mask_req); + aead_request_free(aead_req); + + // Deliver to the next layer. + if (ctx->sk_proto->sendpage) { + msg_cipher.msg_flags |= MSG_MORE; + err = ctx->sk_proto->sendmsg(sk, &msg_cipher, 0); + if (err < 0) { + ret = err; + goto out_put_pages; + } + + err = ctx->sk_proto->sendpage(sk, ctx->cipher_page, 0, + cipher_size, 0); + if (err < 0) { + ret = err; + goto out_put_pages; + } + if (err != cipher_size) { + ret = -EINVAL; + goto out_put_pages; + } + ret = plain_size; + } else { + ret = quic_sendpage(ctx, sk, &msg_cipher, cipher_size, + ctx->cipher_page); + // indicate full plaintext transmission to the caller. + if (ret > 0) + ret = plain_size; + } + +out_put_pages: + quic_put_plain_user_pages(plain_pages, nr_plain_pages); + +out: + return ret; +} + +static int quic_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t len) +{ + struct quic_context *ctx; + int ret; + + rcu_read_lock(); + ctx = quic_get_ctx(sk); + rcu_read_unlock(); + if (!ctx) + return -EINVAL; + + mutex_lock(&ctx->sendmsg_mux); + ret = quic_sendmsg(sk, msg, len); + mutex_unlock(&ctx->sendmsg_mux); + return ret; +} + +static void quic_release_resources(struct sock *sk) +{ + struct quic_internal_crypto_context *crypto_ctx; + struct quic_connection_rhash *connhash; + struct inet_sock *inet = inet_sk(sk); + struct rhashtable_iter hti; + struct quic_context *ctx; + struct proto *sk_proto; + + rcu_read_lock(); + ctx = quic_get_ctx(sk); + if (!ctx) { + rcu_read_unlock(); + return; + } + + sk_proto = ctx->sk_proto; + + rhashtable_walk_enter(&ctx->tx_connections, &hti); + rhashtable_walk_start(&hti); + + while ((connhash = rhashtable_walk_next(&hti))) { + if (IS_ERR(connhash)) { + if (PTR_ERR(connhash) == -EAGAIN) + continue; + break; + } + + crypto_ctx = &connhash->crypto_ctx; + crypto_free_aead(crypto_ctx->packet_aead); + crypto_free_skcipher(crypto_ctx->header_tfm); + memzero_explicit(crypto_ctx, sizeof(*crypto_ctx)); + } + + rhashtable_walk_stop(&hti); + rhashtable_walk_exit(&hti); + rhashtable_destroy(&ctx->tx_connections); + + if (ctx->cipher_page) { + quic_free_cipher_page(ctx->cipher_page); + ctx->cipher_page = NULL; + } + + rcu_read_unlock(); + + write_lock_bh(&sk->sk_callback_lock); + rcu_assign_pointer(inet->ulp_data, NULL); + WRITE_ONCE(sk->sk_prot, sk_proto); + write_unlock_bh(&sk->sk_callback_lock); + + kfree_rcu(ctx, rcu); +} + +static void +quic_prep_protos(unsigned int af, struct proto *proto, const struct proto *base) +{ + if (likely(test_bit(af, &af_init_done))) + return; + + spin_lock(&quic_proto_lock); + if (test_bit(af, &af_init_done)) + goto out_unlock; + + *proto = *base; + proto->setsockopt = quic_setsockopt; + proto->getsockopt = quic_getsockopt; + proto->sendmsg = quic_sendmsg_locked; + + smp_mb__before_atomic(); /* proto calls should be visible first */ + set_bit(af, &af_init_done); + +out_unlock: + spin_unlock(&quic_proto_lock); +} + +static void quic_update_proto(struct sock *sk, struct quic_context *ctx) +{ + struct proto *udp_proto, *quic_proto; + struct inet_sock *inet = inet_sk(sk); + + udp_proto = READ_ONCE(sk->sk_prot); + ctx->sk_proto = udp_proto; + quic_proto = sk->sk_family == AF_INET ? &quic_v4_proto : &quic_v6_proto; + + quic_prep_protos(sk->sk_family, quic_proto, udp_proto); + + write_lock_bh(&sk->sk_callback_lock); + rcu_assign_pointer(inet->ulp_data, ctx); + WRITE_ONCE(sk->sk_prot, quic_proto); + write_unlock_bh(&sk->sk_callback_lock); +} + +static int quic_init(struct sock *sk) +{ + struct quic_context *ctx; + + ctx = quic_ctx_create(); + if (!ctx) + return -ENOMEM; + + quic_update_proto(sk, ctx); + + return 0; +} + +static void quic_release(struct sock *sk) +{ + lock_sock(sk); + quic_release_resources(sk); + release_sock(sk); +} + +static struct udp_ulp_ops quic_ulp_ops __read_mostly = { + .name = "quic-crypto", + .owner = THIS_MODULE, + .init = quic_init, + .release = quic_release, +}; + +static int __init quic_register(void) +{ + udp_register_ulp(&quic_ulp_ops); + return 0; +} + +static void __exit quic_unregister(void) +{ + udp_unregister_ulp(&quic_ulp_ops); +} + +module_init(quic_register); +module_exit(quic_unregister); + +MODULE_DESCRIPTION("QUIC crypto ULP"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS_UDP_ULP("quic-crypto");

Add self tests for ULP operations, flow setup and crypto tests.

Signed-off-by: Adel Abouchaev adel.abushaev@gmail.com

---

Restored the test build. Changed the QUIC context reference variable names for the keys and iv to match the uAPI.

Updated alignment, added SPDX license line.

v3: Added Chacha20-Poly1305 test. --- tools/testing/selftests/net/.gitignore | 4 +- tools/testing/selftests/net/Makefile | 3 +- tools/testing/selftests/net/quic.c | 1153 ++++++++++++++++++++++++ tools/testing/selftests/net/quic.sh | 46 + 4 files changed, 1204 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/net/quic.c create mode 100755 tools/testing/selftests/net/quic.sh

diff --git a/tools/testing/selftests/net/.gitignore b/tools/testing/selftests/net/.gitignore index 0e5751af6247..9e4d00e13238 100644 --- a/tools/testing/selftests/net/.gitignore +++ b/tools/testing/selftests/net/.gitignore @@ -39,4 +39,6 @@ toeplitz tun cmsg_sender unix_connect -tap \ No newline at end of file +tap +unix_connect +quic diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index c0ee2955fe54..1a6cbb24a636 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -42,6 +42,7 @@ TEST_PROGS += arp_ndisc_evict_nocarrier.sh TEST_PROGS += ndisc_unsolicited_na_test.sh TEST_PROGS += arp_ndisc_untracked_subnets.sh TEST_PROGS += stress_reuseport_listen.sh +TEST_PROGS += quic.sh TEST_PROGS_EXTENDED := in_netns.sh setup_loopback.sh setup_veth.sh TEST_PROGS_EXTENDED += toeplitz_client.sh toeplitz.sh TEST_GEN_FILES = socket nettest @@ -57,7 +58,7 @@ TEST_GEN_FILES += ipsec TEST_GEN_FILES += ioam6_parser TEST_GEN_FILES += gro TEST_GEN_PROGS = reuseport_bpf reuseport_bpf_cpu reuseport_bpf_numa -TEST_GEN_PROGS += reuseport_dualstack reuseaddr_conflict tls tun tap +TEST_GEN_PROGS += reuseport_dualstack reuseaddr_conflict tls tun tap quic TEST_GEN_FILES += toeplitz TEST_GEN_FILES += cmsg_sender TEST_GEN_FILES += stress_reuseport_listen diff --git a/tools/testing/selftests/net/quic.c b/tools/testing/selftests/net/quic.c new file mode 100644 index 000000000000..2aa5e1564f5f --- /dev/null +++ b/tools/testing/selftests/net/quic.c @@ -0,0 +1,1153 @@ +// SPDX-License-Identifier: GPL-2.0 + +#define _GNU_SOURCE + +#include <arpa/inet.h> +#include <errno.h> +#include <error.h> +#include <fcntl.h> +#include <poll.h> +#include <sched.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include <linux/limits.h> +#include <linux/quic.h> +#include <linux/socket.h> +#include <linux/tls.h> +#include <linux/tcp.h> +#include <linux/types.h> +#include <linux/udp.h> + +#include <sys/ioctl.h> +#include <sys/types.h> +#include <sys/sendfile.h> +#include <sys/socket.h> +#include <sys/stat.h> + +#include "../kselftest_harness.h" + +#define UDP_ULP 105 + +#ifndef SOL_UDP +#define SOL_UDP 17 +#endif + +// 1. QUIC ULP Registration Test + +FIXTURE(quic_ulp) +{ + int sfd; + socklen_t len_s; + union { + struct sockaddr_in addr; + struct sockaddr_in6 addr6; + } server; + int default_net_ns_fd; + int server_net_ns_fd; +}; + +FIXTURE_VARIANT(quic_ulp) +{ + unsigned int af_server; + char *server_address; + unsigned short server_port; +}; + +FIXTURE_VARIANT_ADD(quic_ulp, ipv4) +{ + .af_server = AF_INET, + .server_address = "10.0.0.2", + .server_port = 7101, +}; + +FIXTURE_VARIANT_ADD(quic_ulp, ipv6) +{ + .af_server = AF_INET6, + .server_address = "2001::2", + .server_port = 7102, +}; + +FIXTURE_SETUP(quic_ulp) +{ + char path[PATH_MAX]; + int optval = 1; + + snprintf(path, sizeof(path), "/proc/%d/ns/net", getpid()); + self->default_net_ns_fd = open(path, O_RDONLY); + ASSERT_GE(self->default_net_ns_fd, 0); + strcpy(path, "/var/run/netns/ns2"); + self->server_net_ns_fd = open(path, O_RDONLY); + ASSERT_GE(self->server_net_ns_fd, 0); + + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + self->sfd = socket(variant->af_server, SOCK_DGRAM, 0); + ASSERT_NE(setsockopt(self->sfd, SOL_SOCKET, SO_REUSEPORT, &optval, + sizeof(optval)), -1); + if (variant->af_server == AF_INET) { + self->len_s = sizeof(self->server.addr); + self->server.addr.sin_family = variant->af_server; + inet_pton(variant->af_server, variant->server_address, + &self->server.addr.sin_addr); + self->server.addr.sin_port = htons(variant->server_port); + ASSERT_EQ(bind(self->sfd, &self->server.addr, self->len_s), 0); + ASSERT_EQ(getsockname(self->sfd, &self->server.addr, + &self->len_s), 0); + } else { + self->len_s = sizeof(self->server.addr6); + self->server.addr6.sin6_family = variant->af_server; + inet_pton(variant->af_server, variant->server_address, + &self->server.addr6.sin6_addr); + self->server.addr6.sin6_port = htons(variant->server_port); + ASSERT_EQ(bind(self->sfd, &self->server.addr6, self->len_s), 0); + ASSERT_EQ(getsockname(self->sfd, &self->server.addr6, + &self->len_s), 0); + } + ASSERT_NE(setns(self->default_net_ns_fd, 0), -1); +}; + +FIXTURE_TEARDOWN(quic_ulp) +{ + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + close(self->sfd); + ASSERT_NE(setns(self->default_net_ns_fd, 0), -1); +}; + +TEST_F(quic_ulp, request_nonexistent_udp_ulp) +{ + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, UDP_ULP, + "nonexistent", sizeof("nonexistent")), -1); + // If UDP_ULP option is not present, the error would be ENOPROTOOPT. + ASSERT_EQ(errno, ENOENT); + ASSERT_NE(setns(self->default_net_ns_fd, 0), -1); +}; + +TEST_F(quic_ulp, request_quic_crypto_udp_ulp) +{ + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, UDP_ULP, + "quic-crypto", sizeof("quic-crypto")), 0); + ASSERT_NE(setns(self->default_net_ns_fd, 0), -1); +}; + +// 2. QUIC Data Path Operation Tests + +#define DO_NOT_SETUP_FLOW 0 +#define SETUP_FLOW 1 + +#define DO_NOT_USE_CLIENT 0 +#define USE_CLIENT 1 + +FIXTURE(quic_data) +{ + int sfd, c1fd, c2fd; + socklen_t len_c1; + socklen_t len_c2; + socklen_t len_s; + + union { + struct sockaddr_in addr; + struct sockaddr_in6 addr6; + } client_1; + union { + struct sockaddr_in addr; + struct sockaddr_in6 addr6; + } client_2; + union { + struct sockaddr_in addr; + struct sockaddr_in6 addr6; + } server; + int default_net_ns_fd; + int client_1_net_ns_fd; + int client_2_net_ns_fd; + int server_net_ns_fd; +}; + +FIXTURE_VARIANT(quic_data) +{ + unsigned int af_client_1; + char *client_1_address; + unsigned short client_1_port; + uint8_t conn_id_1[8]; + uint8_t conn_1_key[16]; + uint8_t conn_1_iv[12]; + uint8_t conn_1_hdr_key[16]; + size_t conn_id_1_len; + bool setup_flow_1; + bool use_client_1; + unsigned int af_client_2; + char *client_2_address; + unsigned short client_2_port; + uint8_t conn_id_2[8]; + uint8_t conn_2_key[16]; + uint8_t conn_2_iv[12]; + uint8_t conn_2_hdr_key[16]; + size_t conn_id_2_len; + bool setup_flow_2; + bool use_client_2; + unsigned int af_server; + char *server_address; + unsigned short server_port; +}; + +FIXTURE_VARIANT_ADD(quic_data, ipv4) +{ + .af_client_1 = AF_INET, + .client_1_address = "10.0.0.1", + .client_1_port = 6667, + .conn_id_1 = {0x11, 0x12, 0x13, 0x14}, + .conn_id_1_len = 4, + .setup_flow_1 = SETUP_FLOW, + .use_client_1 = USE_CLIENT, + .af_client_2 = AF_INET, + .client_2_address = "10.0.0.3", + .client_2_port = 6668, + .conn_id_2 = {0x21, 0x22, 0x23, 0x24}, + .conn_id_2_len = 4, + .setup_flow_2 = SETUP_FLOW, + //.use_client_2 = USE_CLIENT, + .af_server = AF_INET, + .server_address = "10.0.0.2", + .server_port = 6669, +}; + +FIXTURE_VARIANT_ADD(quic_data, ipv6_mapped_ipv4_two_conns) +{ + .af_client_1 = AF_INET6, + .client_1_address = "::ffff:10.0.0.1", + .client_1_port = 6670, + .conn_id_1 = {0x11, 0x12, 0x13, 0x14}, + .conn_id_1_len = 4, + .setup_flow_1 = SETUP_FLOW, + .use_client_1 = USE_CLIENT, + .af_client_2 = AF_INET6, + .client_2_address = "::ffff:10.0.0.3", + .client_2_port = 6671, + .conn_id_2 = {0x21, 0x22, 0x23, 0x24}, + .conn_id_2_len = 4, + .setup_flow_2 = SETUP_FLOW, + .use_client_2 = USE_CLIENT, + .af_server = AF_INET6, + .server_address = "::ffff:10.0.0.2", + .server_port = 6672, +}; + +FIXTURE_VARIANT_ADD(quic_data, ipv6_mapped_ipv4_setup_ipv4_one_conn) +{ + .af_client_1 = AF_INET, + .client_1_address = "10.0.0.3", + .client_1_port = 6676, + .conn_id_1 = {0x11, 0x12, 0x13, 0x14}, + .conn_id_1_len = 4, + .setup_flow_1 = SETUP_FLOW, + .use_client_1 = DO_NOT_USE_CLIENT, + .af_client_2 = AF_INET6, + .client_2_address = "::ffff:10.0.0.3", + .client_2_port = 6676, + .conn_id_2 = {0x11, 0x12, 0x13, 0x14}, + .conn_id_2_len = 4, + .setup_flow_2 = DO_NOT_SETUP_FLOW, + .use_client_2 = USE_CLIENT, + .af_server = AF_INET6, + .server_address = "::ffff:10.0.0.2", + .server_port = 6677, +}; + +FIXTURE_VARIANT_ADD(quic_data, ipv6_mapped_ipv4_setup_ipv6_one_conn) +{ + .af_client_1 = AF_INET6, + .client_1_address = "::ffff:10.0.0.3", + .client_1_port = 6678, + .conn_id_1 = {0x11, 0x12, 0x13, 0x14}, + .setup_flow_1 = SETUP_FLOW, + .use_client_1 = DO_NOT_USE_CLIENT, + .af_client_2 = AF_INET, + .client_2_address = "10.0.0.3", + .client_2_port = 6678, + .conn_id_2 = {0x11, 0x12, 0x13, 0x14}, + .setup_flow_2 = DO_NOT_SETUP_FLOW, + .use_client_2 = USE_CLIENT, + .af_server = AF_INET6, + .server_address = "::ffff:10.0.0.2", + .server_port = 6679, +}; + +FIXTURE_SETUP(quic_data) +{ + char path[PATH_MAX]; + int optval = 1; + + if (variant->af_client_1 == AF_INET) { + self->len_c1 = sizeof(self->client_1.addr); + self->client_1.addr.sin_family = variant->af_client_1; + inet_pton(variant->af_client_1, variant->client_1_address, + &self->client_1.addr.sin_addr); + self->client_1.addr.sin_port = htons(variant->client_1_port); + } else { + self->len_c1 = sizeof(self->client_1.addr6); + self->client_1.addr6.sin6_family = variant->af_client_1; + inet_pton(variant->af_client_1, variant->client_1_address, + &self->client_1.addr6.sin6_addr); + self->client_1.addr6.sin6_port = htons(variant->client_1_port); + } + + if (variant->af_client_2 == AF_INET) { + self->len_c2 = sizeof(self->client_2.addr); + self->client_2.addr.sin_family = variant->af_client_2; + inet_pton(variant->af_client_2, variant->client_2_address, + &self->client_2.addr.sin_addr); + self->client_2.addr.sin_port = htons(variant->client_2_port); + } else { + self->len_c2 = sizeof(self->client_2.addr6); + self->client_2.addr6.sin6_family = variant->af_client_2; + inet_pton(variant->af_client_2, variant->client_2_address, + &self->client_2.addr6.sin6_addr); + self->client_2.addr6.sin6_port = htons(variant->client_2_port); + } + + if (variant->af_server == AF_INET) { + self->len_s = sizeof(self->server.addr); + self->server.addr.sin_family = variant->af_server; + inet_pton(variant->af_server, variant->server_address, + &self->server.addr.sin_addr); + self->server.addr.sin_port = htons(variant->server_port); + } else { + self->len_s = sizeof(self->server.addr6); + self->server.addr6.sin6_family = variant->af_server; + inet_pton(variant->af_server, variant->server_address, + &self->server.addr6.sin6_addr); + self->server.addr6.sin6_port = htons(variant->server_port); + } + + snprintf(path, sizeof(path), "/proc/%d/ns/net", getpid()); + self->default_net_ns_fd = open(path, O_RDONLY); + ASSERT_GE(self->default_net_ns_fd, 0); + strcpy(path, "/var/run/netns/ns11"); + self->client_1_net_ns_fd = open(path, O_RDONLY); + ASSERT_GE(self->client_1_net_ns_fd, 0); + strcpy(path, "/var/run/netns/ns12"); + self->client_2_net_ns_fd = open(path, O_RDONLY); + ASSERT_GE(self->client_2_net_ns_fd, 0); + strcpy(path, "/var/run/netns/ns2"); + self->server_net_ns_fd = open(path, O_RDONLY); + ASSERT_GE(self->server_net_ns_fd, 0); + + if (variant->use_client_1) { + ASSERT_NE(setns(self->client_1_net_ns_fd, 0), -1); + self->c1fd = socket(variant->af_client_1, SOCK_DGRAM, 0); + ASSERT_NE(setsockopt(self->c1fd, SOL_SOCKET, SO_REUSEPORT, + &optval, sizeof(optval)), -1); + if (variant->af_client_1 == AF_INET) { + ASSERT_EQ(bind(self->c1fd, &self->client_1.addr, + self->len_c1), 0); + ASSERT_EQ(getsockname(self->c1fd, &self->client_1.addr, + &self->len_c1), 0); + } else { + ASSERT_EQ(bind(self->c1fd, &self->client_1.addr6, + self->len_c1), 0); + ASSERT_EQ(getsockname(self->c1fd, &self->client_1.addr6, + &self->len_c1), 0); + } + } + + if (variant->use_client_2) { + ASSERT_NE(setns(self->client_2_net_ns_fd, 0), -1); + self->c2fd = socket(variant->af_client_2, SOCK_DGRAM, 0); + ASSERT_NE(setsockopt(self->c2fd, SOL_SOCKET, SO_REUSEPORT, + &optval, sizeof(optval)), -1); + if (variant->af_client_2 == AF_INET) { + ASSERT_EQ(bind(self->c2fd, &self->client_2.addr, + self->len_c2), 0); + ASSERT_EQ(getsockname(self->c2fd, &self->client_2.addr, + &self->len_c2), 0); + } else { + ASSERT_EQ(bind(self->c2fd, &self->client_2.addr6, + self->len_c2), 0); + ASSERT_EQ(getsockname(self->c2fd, &self->client_2.addr6, + &self->len_c2), 0); + } + } + + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + self->sfd = socket(variant->af_server, SOCK_DGRAM, 0); + ASSERT_NE(setsockopt(self->sfd, SOL_SOCKET, SO_REUSEPORT, &optval, + sizeof(optval)), -1); + if (variant->af_server == AF_INET) { + ASSERT_EQ(bind(self->sfd, &self->server.addr, self->len_s), 0); + ASSERT_EQ(getsockname(self->sfd, &self->server.addr, + &self->len_s), 0); + } else { + ASSERT_EQ(bind(self->sfd, &self->server.addr6, self->len_s), 0); + ASSERT_EQ(getsockname(self->sfd, &self->server.addr6, + &self->len_s), 0); + } + + ASSERT_EQ(setsockopt(self->sfd, IPPROTO_UDP, UDP_ULP, + "quic-crypto", sizeof("quic-crypto")), 0); + + ASSERT_NE(setns(self->default_net_ns_fd, 0), -1); +} + +FIXTURE_TEARDOWN(quic_data) +{ + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + close(self->sfd); + ASSERT_NE(setns(self->client_1_net_ns_fd, 0), -1); + close(self->c1fd); + ASSERT_NE(setns(self->client_2_net_ns_fd, 0), -1); + close(self->c2fd); + ASSERT_NE(setns(self->default_net_ns_fd, 0), -1); +} + +TEST_F(quic_data, send_fail_no_flow) +{ + char const *test_str = "test_read"; + int send_len = 10; + + ASSERT_EQ(strlen(test_str) + 1, send_len); + EXPECT_EQ(sendto(self->sfd, test_str, send_len, 0, + &self->client_1.addr, self->len_c1), -1); +}; + +TEST_F(quic_data, encrypt_two_conn_gso_1200_iov_2_size_9000_aesgcm128) +{ + size_t cmsg_tx_len = sizeof(struct quic_tx_ancillary_data); + uint8_t cmsg_buf[CMSG_SPACE(cmsg_tx_len)]; + struct quic_connection_info conn_1_info; + struct quic_connection_info conn_2_info; + struct quic_tx_ancillary_data *anc_data; + socklen_t recv_addr_len_1; + socklen_t recv_addr_len_2; + struct cmsghdr *cmsg_hdr; + int frag_size = 1200; + int send_len = 9000; + struct iovec iov[2]; + int msg_len = 4500; + struct msghdr msg; + char *test_str_1; + char *test_str_2; + char *buf_1; + char *buf_2; + int i; + + test_str_1 = (char *)malloc(9000); + test_str_2 = (char *)malloc(9000); + memset(test_str_1, 0, 9000); + memset(test_str_2, 0, 9000); + + buf_1 = (char *)malloc(10000); + buf_2 = (char *)malloc(10000); + for (i = 0; i < 9000; i += (1200 - 16)) { + test_str_1[i] = 0x40; + memcpy(&test_str_1[i + 1], &variant->conn_id_1, + variant->conn_id_1_len); + test_str_1[i + 1 + variant->conn_id_1_len] = 0xca; + + test_str_2[i] = 0x40; + memcpy(&test_str_2[i + 1], &variant->conn_id_2, + variant->conn_id_2_len); + test_str_2[i + 1 + variant->conn_id_2_len] = 0xca; + } + + // program the connection into the offload + conn_1_info.cipher_type = TLS_CIPHER_AES_GCM_128; + memset(&conn_1_info.key, 0, sizeof(struct quic_connection_info_key)); + conn_1_info.key.conn_id_length = variant->conn_id_1_len; + memcpy(conn_1_info.key.conn_id, + &variant->conn_id_1, + variant->conn_id_1_len); + + conn_2_info.cipher_type = TLS_CIPHER_AES_GCM_128; + memset(&conn_2_info.key, 0, sizeof(struct quic_connection_info_key)); + conn_2_info.key.conn_id_length = variant->conn_id_2_len; + memcpy(conn_2_info.key.conn_id, + &variant->conn_id_2, + variant->conn_id_2_len); + + memcpy(&conn_1_info.aes_gcm_128.payload_key, + &variant->conn_1_key, 16); + memcpy(&conn_1_info.aes_gcm_128.payload_iv, + &variant->conn_1_iv, 12); + memcpy(&conn_1_info.aes_gcm_128.header_key, + &variant->conn_1_hdr_key, 16); + memcpy(&conn_2_info.aes_gcm_128.payload_key, + &variant->conn_2_key, 16); + memcpy(&conn_2_info.aes_gcm_128.payload_iv, + &variant->conn_2_iv, 12); + memcpy(&conn_2_info.aes_gcm_128.header_key, + &variant->conn_2_hdr_key, + 16); + + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, UDP_SEGMENT, &frag_size, + sizeof(frag_size)), 0); + + if (variant->setup_flow_1) + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, + UDP_QUIC_ADD_TX_CONNECTION, + &conn_1_info, sizeof(conn_1_info)), 0); + + if (variant->setup_flow_2) + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, + UDP_QUIC_ADD_TX_CONNECTION, + &conn_2_info, sizeof(conn_2_info)), 0); + + recv_addr_len_1 = self->len_c1; + recv_addr_len_2 = self->len_c2; + + iov[0].iov_base = test_str_1; + iov[0].iov_len = msg_len; + iov[1].iov_base = (void *)test_str_1 + 4500; + iov[1].iov_len = msg_len; + + msg.msg_name = (self->client_1.addr.sin_family == AF_INET) + ? (void *)&self->client_1.addr + : (void *)&self->client_1.addr6; + msg.msg_namelen = self->len_c1; + msg.msg_iov = iov; + msg.msg_iovlen = 2; + msg.msg_control = cmsg_buf; + msg.msg_controllen = sizeof(cmsg_buf); + cmsg_hdr = CMSG_FIRSTHDR(&msg); + cmsg_hdr->cmsg_level = IPPROTO_UDP; + cmsg_hdr->cmsg_type = UDP_QUIC_ENCRYPT; + cmsg_hdr->cmsg_len = CMSG_LEN(cmsg_tx_len); + anc_data = (struct quic_tx_ancillary_data *)CMSG_DATA(cmsg_hdr); + anc_data->next_pkt_num = 0x0d65c9; + anc_data->flags = 0; + anc_data->conn_id_length = variant->conn_id_1_len; + + if (variant->use_client_1) + EXPECT_EQ(sendmsg(self->sfd, &msg, 0), send_len); + + iov[0].iov_base = test_str_2; + iov[0].iov_len = msg_len; + iov[1].iov_base = (void *)test_str_2 + 4500; + iov[1].iov_len = msg_len; + msg.msg_name = (self->client_2.addr.sin_family == AF_INET) + ? (void *)&self->client_2.addr + : (void *)&self->client_2.addr6; + msg.msg_namelen = self->len_c2; + cmsg_hdr = CMSG_FIRSTHDR(&msg); + anc_data = (struct quic_tx_ancillary_data *)CMSG_DATA(cmsg_hdr); + anc_data->next_pkt_num = 0x0d65c9; + anc_data->conn_id_length = variant->conn_id_2_len; + anc_data->flags = 0; + + if (variant->use_client_2) + EXPECT_EQ(sendmsg(self->sfd, &msg, 0), send_len); + + if (variant->use_client_1) { + ASSERT_NE(setns(self->client_1_net_ns_fd, 0), -1); + if (variant->af_client_1 == AF_INET) { + for (i = 0; i < 7; ++i) { + EXPECT_EQ(recvfrom(self->c1fd, buf_1, 9000, 0, + &self->client_1.addr, + &recv_addr_len_1), + 1200); + // Validate framing is intact. + EXPECT_EQ(memcmp((void *)buf_1 + 1, + &variant->conn_id_1, + variant->conn_id_1_len), 0); + } + EXPECT_EQ(recvfrom(self->c1fd, buf_1, 9000, 0, + &self->client_1.addr, + &recv_addr_len_1), + 728); + EXPECT_EQ(memcmp((void *)buf_1 + 1, + &variant->conn_id_1, + variant->conn_id_1_len), 0); + } else { + for (i = 0; i < 7; ++i) { + EXPECT_EQ(recvfrom(self->c1fd, buf_1, 9000, 0, + &self->client_1.addr6, + &recv_addr_len_1), + 1200); + } + EXPECT_EQ(recvfrom(self->c1fd, buf_1, 9000, 0, + &self->client_1.addr6, + &recv_addr_len_1), + 728); + EXPECT_EQ(memcmp((void *)buf_1 + 1, + &variant->conn_id_1, + variant->conn_id_1_len), 0); + } + EXPECT_NE(memcmp(buf_1, test_str_1, send_len), 0); + } + + if (variant->use_client_2) { + ASSERT_NE(setns(self->client_2_net_ns_fd, 0), -1); + if (variant->af_client_2 == AF_INET) { + for (i = 0; i < 7; ++i) { + EXPECT_EQ(recvfrom(self->c2fd, buf_2, 9000, 0, + &self->client_2.addr, + &recv_addr_len_2), + 1200); + EXPECT_EQ(memcmp((void *)buf_2 + 1, + &variant->conn_id_2, + variant->conn_id_2_len), 0); + } + EXPECT_EQ(recvfrom(self->c2fd, buf_2, 9000, 0, + &self->client_2.addr, + &recv_addr_len_2), + 728); + EXPECT_EQ(memcmp((void *)buf_2 + 1, + &variant->conn_id_2, + variant->conn_id_2_len), 0); + } else { + for (i = 0; i < 7; ++i) { + EXPECT_EQ(recvfrom(self->c2fd, buf_2, 9000, 0, + &self->client_2.addr6, + &recv_addr_len_2), + 1200); + EXPECT_EQ(memcmp((void *)buf_2 + 1, + &variant->conn_id_2, + variant->conn_id_2_len), 0); + } + EXPECT_EQ(recvfrom(self->c2fd, buf_2, 9000, 0, + &self->client_2.addr6, + &recv_addr_len_2), + 728); + EXPECT_EQ(memcmp((void *)buf_2 + 1, + &variant->conn_id_2, + variant->conn_id_2_len), 0); + } + EXPECT_NE(memcmp(buf_2, test_str_2, send_len), 0); + } + + if (variant->use_client_1 && variant->use_client_2) + EXPECT_NE(memcmp(buf_1, buf_2, send_len), 0); + + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + if (variant->setup_flow_1) { + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, + UDP_QUIC_DEL_TX_CONNECTION, + &conn_1_info, sizeof(conn_1_info)), + 0); + } + if (variant->setup_flow_2) { + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, + UDP_QUIC_DEL_TX_CONNECTION, + &conn_2_info, sizeof(conn_2_info)), + 0); + } + free(test_str_1); + free(test_str_2); + free(buf_1); + free(buf_2); + ASSERT_NE(setns(self->default_net_ns_fd, 0), -1); +} + +// 3. QUIC Encryption Tests + +FIXTURE(quic_crypto) +{ + int sfd, cfd; + socklen_t len_c; + socklen_t len_s; + union { + struct sockaddr_in addr; + struct sockaddr_in6 addr6; + } client; + union { + struct sockaddr_in addr; + struct sockaddr_in6 addr6; + } server; + int default_net_ns_fd; + int client_net_ns_fd; + int server_net_ns_fd; +}; + +FIXTURE_VARIANT(quic_crypto) +{ + unsigned int af_client; + char *client_address; + unsigned short client_port; + uint32_t algo; + size_t conn_key_len; + uint8_t conn_id[8]; + union { + uint8_t conn_key_16[16]; + uint8_t conn_key_32[32]; + } conn_key; + uint8_t conn_iv[12]; + union { + uint8_t conn_hdr_key_16[16]; + uint8_t conn_hdr_key_32[32]; + } conn_hdr_key; + size_t conn_id_len; + bool setup_flow; + bool use_client; + unsigned int af_server; + char *server_address; + unsigned short server_port; + char plain[128]; + size_t plain_len; + char match[128]; + size_t match_len; + uint32_t next_pkt_num; +}; + +FIXTURE_SETUP(quic_crypto) +{ + char path[PATH_MAX]; + int optval = 1; + + if (variant->af_client == AF_INET) { + self->len_c = sizeof(self->client.addr); + self->client.addr.sin_family = variant->af_client; + inet_pton(variant->af_client, variant->client_address, + &self->client.addr.sin_addr); + self->client.addr.sin_port = htons(variant->client_port); + } else { + self->len_c = sizeof(self->client.addr6); + self->client.addr6.sin6_family = variant->af_client; + inet_pton(variant->af_client, variant->client_address, + &self->client.addr6.sin6_addr); + self->client.addr6.sin6_port = htons(variant->client_port); + } + + if (variant->af_server == AF_INET) { + self->len_s = sizeof(self->server.addr); + self->server.addr.sin_family = variant->af_server; + inet_pton(variant->af_server, variant->server_address, + &self->server.addr.sin_addr); + self->server.addr.sin_port = htons(variant->server_port); + } else { + self->len_s = sizeof(self->server.addr6); + self->server.addr6.sin6_family = variant->af_server; + inet_pton(variant->af_server, variant->server_address, + &self->server.addr6.sin6_addr); + self->server.addr6.sin6_port = htons(variant->server_port); + } + + snprintf(path, sizeof(path), "/proc/%d/ns/net", getpid()); + self->default_net_ns_fd = open(path, O_RDONLY); + ASSERT_GE(self->default_net_ns_fd, 0); + strcpy(path, "/var/run/netns/ns11"); + self->client_net_ns_fd = open(path, O_RDONLY); + ASSERT_GE(self->client_net_ns_fd, 0); + strcpy(path, "/var/run/netns/ns2"); + self->server_net_ns_fd = open(path, O_RDONLY); + ASSERT_GE(self->server_net_ns_fd, 0); + + if (variant->use_client) { + ASSERT_NE(setns(self->client_net_ns_fd, 0), -1); + self->cfd = socket(variant->af_client, SOCK_DGRAM, 0); + ASSERT_NE(setsockopt(self->cfd, SOL_SOCKET, SO_REUSEPORT, + &optval, sizeof(optval)), -1); + if (variant->af_client == AF_INET) { + ASSERT_EQ(bind(self->cfd, &self->client.addr, + self->len_c), 0); + ASSERT_EQ(getsockname(self->cfd, &self->client.addr, + &self->len_c), 0); + } else { + ASSERT_EQ(bind(self->cfd, &self->client.addr6, + self->len_c), 0); + ASSERT_EQ(getsockname(self->cfd, &self->client.addr6, + &self->len_c), 0); + } + } + + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + self->sfd = socket(variant->af_server, SOCK_DGRAM, 0); + ASSERT_NE(setsockopt(self->sfd, SOL_SOCKET, SO_REUSEPORT, &optval, + sizeof(optval)), -1); + if (variant->af_server == AF_INET) { + ASSERT_EQ(bind(self->sfd, &self->server.addr, self->len_s), 0); + ASSERT_EQ(getsockname(self->sfd, &self->server.addr, + &self->len_s), + 0); + } else { + ASSERT_EQ(bind(self->sfd, &self->server.addr6, self->len_s), 0); + ASSERT_EQ(getsockname(self->sfd, &self->server.addr6, + &self->len_s), + 0); + } + + ASSERT_EQ(setsockopt(self->sfd, IPPROTO_UDP, UDP_ULP, + "quic-crypto", sizeof("quic-crypto")), 0); + + ASSERT_NE(setns(self->default_net_ns_fd, 0), -1); +} + +FIXTURE_TEARDOWN(quic_crypto) +{ + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + close(self->sfd); + ASSERT_NE(setns(self->client_net_ns_fd, 0), -1); + close(self->cfd); + ASSERT_NE(setns(self->default_net_ns_fd, 0), -1); +} + +FIXTURE_VARIANT_ADD(quic_crypto, ipv4_aes_gcm_128) +{ + .af_client = AF_INET, + .client_address = "10.0.0.1", + .client_port = 7667, + .algo = TLS_CIPHER_AES_GCM_128, + .conn_key_len = 16, + .conn_id = {0x08, 0x6b, 0xbf, 0x88, 0x82, 0xb9, 0x12, 0x49}, + .conn_key = { + .conn_key_16 = {0x87, 0x71, 0xea, 0x1d, + 0xfb, 0xbe, 0x7a, 0x45, + 0xbb, 0xe2, 0x7e, 0xbc, + 0x0b, 0x53, 0x94, 0x99 + }, + }, + .conn_iv = {0x3A, 0xA7, 0x46, 0x72, 0xE9, 0x83, 0x6B, 0x55, 0xDA, + 0x66, 0x7B, 0xDA}, + .conn_hdr_key = { + .conn_hdr_key_16 = {0xc9, 0x8e, 0xfd, 0xf2, + 0x0b, 0x64, 0x8c, 0x57, + 0xb5, 0x0a, 0xb2, 0xd2, + 0x21, 0xd3, 0x66, 0xa5}, + }, + .conn_id_len = 8, + .setup_flow = SETUP_FLOW, + .use_client = USE_CLIENT, + .af_server = AF_INET, + .server_address = "10.0.0.2", + .server_port = 7669, + .plain = { 0x40, 0x08, 0x6b, 0xbf, 0x88, 0x82, 0xb9, 0x12, + 0x49, 0xca, + // payload + 0x02, 0x80, 0xde, 0x40, 0x39, 0x40, 0xf6, 0x00, + 0x01, 0x0b, 0x00, 0x0f, 0x65, 0x63, 0x68, 0x6f, + 0x20, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, + 0x37, 0x38, 0x39 + }, + .plain_len = 37, + .match = { + 0x46, 0x08, 0x6b, 0xbf, 0x88, 0x82, 0xb9, 0x12, + 0x49, 0x1c, 0x44, 0xb8, 0x41, 0xbb, 0xcf, 0x6e, + 0x0a, 0x2a, 0x24, 0xfb, 0xb4, 0x79, 0x62, 0xea, + 0x59, 0x38, 0x1a, 0x0e, 0x50, 0x1e, 0x59, 0xed, + 0x3f, 0x8e, 0x7e, 0x5a, 0x70, 0xe4, 0x2a, 0xbc, + 0x2a, 0xfa, 0x2b, 0x54, 0xeb, 0x89, 0xc3, 0x2c, + 0xb6, 0x8c, 0x1e, 0xab, 0x2d + }, + .match_len = 53, + .next_pkt_num = 0x0d65c9, +}; + +FIXTURE_VARIANT_ADD(quic_crypto, ipv4_chacha20_poly1305) +{ + .af_client = AF_INET, + .client_address = "10.0.0.1", + .client_port = 7801, + .algo = TLS_CIPHER_CHACHA20_POLY1305, + .conn_key_len = 32, + .conn_id = {}, + .conn_id_len = 0, + .conn_key = { + .conn_key_32 = { + 0x3b, 0xfc, 0xdd, 0xd7, 0x2b, 0xcf, 0x02, 0x54, + 0x1d, 0x7f, 0xa0, 0xdd, 0x1f, 0x5f, 0x9e, 0xee, + 0xa8, 0x17, 0xe0, 0x9a, 0x69, 0x63, 0xa0, 0xe6, + 0xc7, 0xdf, 0x0f, 0x9a, 0x1b, 0xab, 0x90, 0xf2, + }, + }, + .conn_iv = { + 0xa6, 0xb5, 0xbc, 0x6a, 0xb7, 0xda, 0xfc, 0xe3, + 0x0f, 0xff, 0xf5, 0xdd, + }, + .conn_hdr_key = { + .conn_hdr_key_32 = { + 0xd6, 0x59, 0x76, 0x0d, 0x2b, 0xa4, 0x34, 0xa2, + 0x26, 0xfd, 0x37, 0xb3, 0x5c, 0x69, 0xe2, 0xda, + 0x82, 0x11, 0xd1, 0x0c, 0x4f, 0x12, 0x53, 0x87, + 0x87, 0xd6, 0x56, 0x45, 0xd5, 0xd1, 0xb8, 0xe2, + }, + }, + .setup_flow = SETUP_FLOW, + .use_client = USE_CLIENT, + .af_server = AF_INET, + .server_address = "10.0.0.2", + .server_port = 7802, + .plain = { 0x42, 0x00, 0xbf, 0xf4, 0x01 }, + .plain_len = 5, + .match = { 0x55, 0x58, 0xb1, 0xc6, 0x0a, 0xe7, 0xb6, 0xb9, + 0x32, 0xbc, 0x27, 0xd7, 0x86, 0xf4, 0xbc, 0x2b, + 0xb2, 0x0f, 0x21, 0x62, 0xba }, + .match_len = 21, + .next_pkt_num = 0x2700bff5, +}; + +FIXTURE_VARIANT_ADD(quic_crypto, ipv6_aes_gcm_128) +{ + .af_client = AF_INET6, + .client_address = "2001::1", + .client_port = 7673, + .algo = TLS_CIPHER_AES_GCM_128, + .conn_key_len = 16, + .conn_id = {0x08, 0x6b, 0xbf, 0x88, 0x82, 0xb9, 0x12, 0x49}, + .conn_key = { + .conn_key_16 = {0x87, 0x71, 0xea, 0x1d, + 0xfb, 0xbe, 0x7a, 0x45, + 0xbb, 0xe2, 0x7e, 0xbc, + 0x0b, 0x53, 0x94, 0x99 + }, + }, + .conn_iv = {0x3a, 0xa7, 0x46, 0x72, 0xe9, 0x83, 0x6b, 0x55, 0xda, + 0x66, 0x7b, 0xda}, + .conn_hdr_key = { + .conn_hdr_key_16 = {0xc9, 0x8e, 0xfd, 0xf2, + 0x0b, 0x64, 0x8c, 0x57, + 0xb5, 0x0a, 0xb2, 0xd2, + 0x21, 0xd3, 0x66, 0xa5}, + }, + .conn_id_len = 8, + .setup_flow = SETUP_FLOW, + .use_client = USE_CLIENT, + .af_server = AF_INET6, + .server_address = "2001::2", + .server_port = 7675, + .plain = { 0x40, 0x08, 0x6b, 0xbf, 0x88, 0x82, 0xb9, 0x12, + 0x49, 0xca, + // Payload + 0x02, 0x80, 0xde, 0x40, 0x39, 0x40, 0xf6, 0x00, + 0x01, 0x0b, 0x00, 0x0f, 0x65, 0x63, 0x68, 0x6f, + 0x20, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, + 0x37, 0x38, 0x39 + }, + .plain_len = 37, + .match = { + 0x46, 0x08, 0x6b, 0xbf, 0x88, 0x82, 0xb9, 0x12, + 0x49, 0x1c, 0x44, 0xb8, 0x41, 0xbb, 0xcf, 0x6e, + 0x0a, 0x2a, 0x24, 0xfb, 0xb4, 0x79, 0x62, 0xea, + 0x59, 0x38, 0x1a, 0x0e, 0x50, 0x1e, 0x59, 0xed, + 0x3f, 0x8e, 0x7e, 0x5a, 0x70, 0xe4, 0x2a, 0xbc, + 0x2a, 0xfa, 0x2b, 0x54, 0xeb, 0x89, 0xc3, 0x2c, + 0xb6, 0x8c, 0x1e, 0xab, 0x2d + }, + .match_len = 53, + .next_pkt_num = 0x0d65c9, +}; + +FIXTURE_VARIANT_ADD(quic_crypto, ipv6_chacha20_poly1305) +{ + .af_client = AF_INET6, + .client_address = "2001::1", + .client_port = 7803, + .algo = TLS_CIPHER_CHACHA20_POLY1305, + .conn_key_len = 32, + .conn_id = {}, + .conn_id_len = 0, + .conn_key = { + .conn_key_32 = { + 0x3b, 0xfc, 0xdd, 0xd7, 0x2b, 0xcf, 0x02, 0x54, + 0x1d, 0x7f, 0xa0, 0xdd, 0x1f, 0x5f, 0x9e, 0xee, + 0xa8, 0x17, 0xe0, 0x9a, 0x69, 0x63, 0xa0, 0xe6, + 0xc7, 0xdf, 0x0f, 0x9a, 0x1b, 0xab, 0x90, 0xf2, + }, + }, + .conn_iv = { + 0xa6, 0xb5, 0xbc, 0x6a, 0xb7, 0xda, 0xfc, 0xe3, + 0x0f, 0xff, 0xf5, 0xdd, + }, + .conn_hdr_key = { + .conn_hdr_key_32 = { + 0xd6, 0x59, 0x76, 0x0d, 0x2b, 0xa4, 0x34, 0xa2, + 0x26, 0xfd, 0x37, 0xb3, 0x5c, 0x69, 0xe2, 0xda, + 0x82, 0x11, 0xd1, 0x0c, 0x4f, 0x12, 0x53, 0x87, + 0x87, 0xd6, 0x56, 0x45, 0xd5, 0xd1, 0xb8, 0xe2, + }, + }, + .setup_flow = SETUP_FLOW, + .use_client = USE_CLIENT, + .af_server = AF_INET6, + .server_address = "2001::2", + .server_port = 7804, + .plain = { 0x42, 0x00, 0xbf, 0xf4, 0x01 }, + .plain_len = 5, + .match = { 0x55, 0x58, 0xb1, 0xc6, 0x0a, 0xe7, 0xb6, 0xb9, + 0x32, 0xbc, 0x27, 0xd7, 0x86, 0xf4, 0xbc, 0x2b, + 0xb2, 0x0f, 0x21, 0x62, 0xba }, + .match_len = 21, + .next_pkt_num = 0x2700bff5, +}; + +TEST_F(quic_crypto, encrypt_test_vector_single_flow_gso_in_control) +{ + uint8_t cmsg_buf[CMSG_SPACE(sizeof(struct quic_tx_ancillary_data)) + + CMSG_SPACE(sizeof(uint16_t))]; + struct quic_tx_ancillary_data *anc_data; + struct quic_connection_info conn_info; + uint16_t frag_size = 1200; + struct cmsghdr *cmsg_hdr; + int wrong_frag_size = 26; + socklen_t recv_addr_len; + struct iovec iov; + struct msghdr msg; + char *buf; + + buf = (char *)malloc(9000); + conn_info.cipher_type = variant->algo; + memset(&conn_info.key, 0, sizeof(struct quic_connection_info_key)); + conn_info.key.conn_id_length = variant->conn_id_len; + memcpy(conn_info.key.conn_id, + &variant->conn_id, + variant->conn_id_len); + ASSERT_TRUE(variant->algo == TLS_CIPHER_AES_GCM_128 || + variant->algo == TLS_CIPHER_CHACHA20_POLY1305); + switch (variant->algo) { + case TLS_CIPHER_AES_GCM_128: + memcpy(&conn_info.aes_gcm_128.payload_key, + &variant->conn_key, 16); + memcpy(&conn_info.aes_gcm_128.payload_iv, + &variant->conn_iv, 12); + memcpy(&conn_info.aes_gcm_128.header_key, + &variant->conn_hdr_key, 16); + break; + case TLS_CIPHER_CHACHA20_POLY1305: + memcpy(&conn_info.chacha20_poly1305.payload_key, + &variant->conn_key, 32); + memcpy(&conn_info.chacha20_poly1305.payload_iv, + &variant->conn_iv, 12); + memcpy(&conn_info.chacha20_poly1305.header_key, + &variant->conn_hdr_key, 32); + break; + } + + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, UDP_SEGMENT, &wrong_frag_size, + sizeof(wrong_frag_size)), 0); + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, UDP_QUIC_ADD_TX_CONNECTION, + &conn_info, sizeof(conn_info)), 0); + + recv_addr_len = self->len_c; + iov.iov_base = (void *)variant->plain; + iov.iov_len = variant->plain_len; + memset(cmsg_buf, 0, sizeof(cmsg_buf)); + msg.msg_name = (self->client.addr.sin_family == AF_INET) + ? (void *)&self->client.addr + : (void *)&self->client.addr6; + msg.msg_namelen = self->len_c; + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + msg.msg_control = cmsg_buf; + msg.msg_controllen = sizeof(cmsg_buf); + cmsg_hdr = CMSG_FIRSTHDR(&msg); + cmsg_hdr->cmsg_level = IPPROTO_UDP; + cmsg_hdr->cmsg_type = UDP_QUIC_ENCRYPT; + cmsg_hdr->cmsg_len = CMSG_LEN(sizeof(struct quic_tx_ancillary_data)); + anc_data = (struct quic_tx_ancillary_data *)CMSG_DATA(cmsg_hdr); + anc_data->flags = 0; + anc_data->next_pkt_num = variant->next_pkt_num; + anc_data->conn_id_length = variant->conn_id_len; + cmsg_hdr = CMSG_NXTHDR(&msg, cmsg_hdr); + cmsg_hdr->cmsg_level = IPPROTO_UDP; + cmsg_hdr->cmsg_type = UDP_SEGMENT; + cmsg_hdr->cmsg_len = CMSG_LEN(sizeof(uint16_t)); + memcpy(CMSG_DATA(cmsg_hdr), (void *)&frag_size, sizeof(frag_size)); + + EXPECT_EQ(sendmsg(self->sfd, &msg, 0), variant->plain_len); + ASSERT_NE(setns(self->client_net_ns_fd, 0), -1); + if (variant->af_client == AF_INET) { + EXPECT_EQ(recvfrom(self->cfd, buf, 9000, 0, + &self->client.addr, &recv_addr_len), + variant->match_len); + } else { + EXPECT_EQ(recvfrom(self->cfd, buf, 9000, 0, + &self->client.addr6, &recv_addr_len), + variant->match_len); + } + EXPECT_STREQ(buf, variant->match); + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, UDP_QUIC_DEL_TX_CONNECTION, + &conn_info, sizeof(conn_info)), 0); + free(buf); + ASSERT_NE(setns(self->default_net_ns_fd, 0), -1); +} + +TEST_F(quic_crypto, encrypt_test_vector_single_flow_gso_in_setsockopt) +{ + uint8_t cmsg_buf[CMSG_SPACE(sizeof(struct quic_tx_ancillary_data))]; + struct quic_tx_ancillary_data *anc_data; + struct quic_connection_info conn_info; + int frag_size = 1200; + struct cmsghdr *cmsg_hdr; + socklen_t recv_addr_len; + struct iovec iov; + struct msghdr msg; + char *buf; + + buf = (char *)malloc(9000); + conn_info.cipher_type = variant->algo; + memset(&conn_info.key, 0, sizeof(struct quic_connection_info_key)); + conn_info.key.conn_id_length = variant->conn_id_len; + memcpy(conn_info.key.conn_id, + &variant->conn_id, + variant->conn_id_len); + ASSERT_TRUE(variant->algo == TLS_CIPHER_AES_GCM_128 || + variant->algo == TLS_CIPHER_CHACHA20_POLY1305); + switch (variant->algo) { + case TLS_CIPHER_AES_GCM_128: + memcpy(&conn_info.aes_gcm_128.payload_key, + &variant->conn_key, 16); + memcpy(&conn_info.aes_gcm_128.payload_iv, + &variant->conn_iv, 12); + memcpy(&conn_info.aes_gcm_128.header_key, + &variant->conn_hdr_key, 16); + break; + case TLS_CIPHER_CHACHA20_POLY1305: + memcpy(&conn_info.chacha20_poly1305.payload_key, + &variant->conn_key, 32); + memcpy(&conn_info.chacha20_poly1305.payload_iv, + &variant->conn_iv, 12); + memcpy(&conn_info.chacha20_poly1305.header_key, + &variant->conn_hdr_key, 32); + break; + } + + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, UDP_SEGMENT, &frag_size, + sizeof(frag_size)), 0); + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, UDP_QUIC_ADD_TX_CONNECTION, + &conn_info, sizeof(conn_info)), 0); + + recv_addr_len = self->len_c; + iov.iov_base = (void *)variant->plain; + iov.iov_len = variant->plain_len; + memset(cmsg_buf, 0, sizeof(cmsg_buf)); + msg.msg_name = (self->client.addr.sin_family == AF_INET) + ? (void *)&self->client.addr + : (void *)&self->client.addr6; + msg.msg_namelen = self->len_c; + msg.msg_iov = &iov; + msg.msg_iovlen = 1; + msg.msg_control = cmsg_buf; + msg.msg_controllen = sizeof(cmsg_buf); + cmsg_hdr = CMSG_FIRSTHDR(&msg); + cmsg_hdr->cmsg_level = IPPROTO_UDP; + cmsg_hdr->cmsg_type = UDP_QUIC_ENCRYPT; + cmsg_hdr->cmsg_len = CMSG_LEN(sizeof(struct quic_tx_ancillary_data)); + anc_data = (struct quic_tx_ancillary_data *)CMSG_DATA(cmsg_hdr); + anc_data->flags = 0; + anc_data->next_pkt_num = variant->next_pkt_num; + anc_data->conn_id_length = variant->conn_id_len; + + EXPECT_EQ(sendmsg(self->sfd, &msg, 0), variant->plain_len); + ASSERT_NE(setns(self->client_net_ns_fd, 0), -1); + if (variant->af_client == AF_INET) { + EXPECT_EQ(recvfrom(self->cfd, buf, 9000, 0, + &self->client.addr, &recv_addr_len), + variant->match_len); + } else { + EXPECT_EQ(recvfrom(self->cfd, buf, 9000, 0, + &self->client.addr6, &recv_addr_len), + variant->match_len); + } + EXPECT_STREQ(buf, variant->match); + ASSERT_NE(setns(self->server_net_ns_fd, 0), -1); + ASSERT_EQ(setsockopt(self->sfd, SOL_UDP, UDP_QUIC_DEL_TX_CONNECTION, + &conn_info, sizeof(conn_info)), 0); + free(buf); + ASSERT_NE(setns(self->default_net_ns_fd, 0), -1); +} + +TEST_HARNESS_MAIN diff --git a/tools/testing/selftests/net/quic.sh b/tools/testing/selftests/net/quic.sh new file mode 100755 index 000000000000..8ff8bc494671 --- /dev/null +++ b/tools/testing/selftests/net/quic.sh @@ -0,0 +1,46 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +sudo ip netns add ns11 +sudo ip netns add ns12 +sudo ip netns add ns2 +sudo ip link add veth11 type veth peer name br-veth11 +sudo ip link add veth12 type veth peer name br-veth12 +sudo ip link add veth2 type veth peer name br-veth2 +sudo ip link set veth11 netns ns11 +sudo ip link set veth12 netns ns12 +sudo ip link set veth2 netns ns2 +sudo ip netns exec ns11 ip addr add 10.0.0.1/24 dev veth11 +sudo ip netns exec ns11 ip addr add ::ffff:10.0.0.1/96 dev veth11 +sudo ip netns exec ns11 ip addr add 2001::1/64 dev veth11 +sudo ip netns exec ns12 ip addr add 10.0.0.3/24 dev veth12 +sudo ip netns exec ns12 ip addr add ::ffff:10.0.0.3/96 dev veth12 +sudo ip netns exec ns12 ip addr add 2001::3/64 dev veth12 +sudo ip netns exec ns2 ip addr add 10.0.0.2/24 dev veth2 +sudo ip netns exec ns2 ip addr add ::ffff:10.0.0.2/96 dev veth2 +sudo ip netns exec ns2 ip addr add 2001::2/64 dev veth2 +sudo ip link add name br1 type bridge forward_delay 0 +sudo ip link set br1 up +sudo ip link set br-veth11 up +sudo ip link set br-veth12 up +sudo ip link set br-veth2 up +sudo ip netns exec ns11 ip link set veth11 up +sudo ip netns exec ns12 ip link set veth12 up +sudo ip netns exec ns2 ip link set veth2 up +sudo ip link set br-veth11 master br1 +sudo ip link set br-veth12 master br1 +sudo ip link set br-veth2 master br1 +sudo ip netns exec ns2 cat /proc/net/quic_stat + +printf "%s" "Waiting for bridge to start fowarding ..." +while ! timeout 0.5 sudo ip netns exec ns2 ping -c 1 -n 2001::1 &> /dev/null +do + printf "%c" "." +done +printf "\n%s\n" "Bridge is operational" + +sudo ./quic +sudo ip netns exec ns2 cat /proc/net/quic_stat +sudo ip netns delete ns2 +sudo ip netns delete ns12 +sudo ip netns delete ns11