diff options
| -rw-r--r-- | hw/vmware_utils.h | 143 | ||||
| -rw-r--r-- | hw/vmxnet_debug.h | 115 | ||||
| -rw-r--r-- | include/net/eth.h | 347 | ||||
| -rw-r--r-- | net/Makefile.objs | 1 | ||||
| -rw-r--r-- | net/eth.c | 217 |
5 files changed, 823 insertions, 0 deletions
diff --git a/hw/vmware_utils.h b/hw/vmware_utils.h new file mode 100644 index 0000000000..5307e2ccc9 --- /dev/null +++ b/hw/vmware_utils.h @@ -0,0 +1,143 @@ +/* + * QEMU VMWARE paravirtual devices - auxiliary code + * + * Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com) + * + * Developed by Daynix Computing LTD (http://www.daynix.com) + * + * Authors: + * Dmitry Fleytman <dmitry@daynix.com> + * Yan Vugenfirer <yan@daynix.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#ifndef VMWARE_UTILS_H +#define VMWARE_UTILS_H + +#include "qemu/range.h" + +#ifndef VMW_SHPRN +#define VMW_SHPRN(fmt, ...) do {} while (0) +#endif + +/* + * Shared memory access functions with byte swap support + * Each function contains printout for reverse-engineering needs + * + */ +static inline void +vmw_shmem_read(hwaddr addr, void *buf, int len) +{ + VMW_SHPRN("SHMEM r: %" PRIx64 ", len: %d to %p", addr, len, buf); + cpu_physical_memory_read(addr, buf, len); +} + +static inline void +vmw_shmem_write(hwaddr addr, void *buf, int len) +{ + VMW_SHPRN("SHMEM w: %" PRIx64 ", len: %d to %p", addr, len, buf); + cpu_physical_memory_write(addr, buf, len); +} + +static inline void +vmw_shmem_rw(hwaddr addr, void *buf, int len, int is_write) +{ + VMW_SHPRN("SHMEM r/w: %" PRIx64 ", len: %d (to %p), is write: %d", + addr, len, buf, is_write); + + cpu_physical_memory_rw(addr, buf, len, is_write); +} + +static inline void +vmw_shmem_set(hwaddr addr, uint8 val, int len) +{ + int i; + VMW_SHPRN("SHMEM set: %" PRIx64 ", len: %d (value 0x%X)", addr, len, val); + + for (i = 0; i < len; i++) { + cpu_physical_memory_write(addr + i, &val, 1); + } +} + +static inline uint32_t +vmw_shmem_ld8(hwaddr addr) +{ + uint8_t res = ldub_phys(addr); + VMW_SHPRN("SHMEM load8: %" PRIx64 " (value 0x%X)", addr, res); + return res; +} + +static inline void +vmw_shmem_st8(hwaddr addr, uint8_t value) +{ + VMW_SHPRN("SHMEM store8: %" PRIx64 " (value 0x%X)", addr, value); + stb_phys(addr, value); +} + +static inline uint32_t +vmw_shmem_ld16(hwaddr addr) +{ + uint16_t res = lduw_le_phys(addr); + VMW_SHPRN("SHMEM load16: %" PRIx64 " (value 0x%X)", addr, res); + return res; +} + +static inline void +vmw_shmem_st16(hwaddr addr, uint16_t value) +{ + VMW_SHPRN("SHMEM store16: %" PRIx64 " (value 0x%X)", addr, value); + stw_le_phys(addr, value); +} + +static inline uint32_t +vmw_shmem_ld32(hwaddr addr) +{ + uint32_t res = ldl_le_phys(addr); + VMW_SHPRN("SHMEM load32: %" PRIx64 " (value 0x%X)", addr, res); + return res; +} + +static inline void +vmw_shmem_st32(hwaddr addr, uint32_t value) +{ + VMW_SHPRN("SHMEM store32: %" PRIx64 " (value 0x%X)", addr, value); + stl_le_phys(addr, value); +} + +static inline uint64_t +vmw_shmem_ld64(hwaddr addr) +{ + uint64_t res = ldq_le_phys(addr); + VMW_SHPRN("SHMEM load64: %" PRIx64 " (value %" PRIx64 ")", addr, res); + return res; +} + +static inline void +vmw_shmem_st64(hwaddr addr, uint64_t value) +{ + VMW_SHPRN("SHMEM store64: %" PRIx64 " (value %" PRIx64 ")", addr, value); + stq_le_phys(addr, value); +} + +/* Macros for simplification of operations on array-style registers */ + +/* + * Whether <addr> lies inside of array-style register defined by <base>, + * number of elements (<cnt>) and element size (<regsize>) + * +*/ +#define VMW_IS_MULTIREG_ADDR(addr, base, cnt, regsize) \ + range_covers_byte(base, cnt * regsize, addr) + +/* + * Returns index of given register (<addr>) in array-style register defined by + * <base> and element size (<regsize>) + * +*/ +#define VMW_MULTIREG_IDX_BY_ADDR(addr, base, regsize) \ + (((addr) - (base)) / (regsize)) + +#endif diff --git a/hw/vmxnet_debug.h b/hw/vmxnet_debug.h new file mode 100644 index 0000000000..96dae0f916 --- /dev/null +++ b/hw/vmxnet_debug.h @@ -0,0 +1,115 @@ +/* + * QEMU VMWARE VMXNET* paravirtual NICs - debugging facilities + * + * Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com) + * + * Developed by Daynix Computing LTD (http://www.daynix.com) + * + * Authors: + * Dmitry Fleytman <dmitry@daynix.com> + * Tamir Shomer <tamirs@daynix.com> + * Yan Vugenfirer <yan@daynix.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#ifndef _QEMU_VMXNET_DEBUG_H +#define _QEMU_VMXNET_DEBUG_H + +#define VMXNET_DEVICE_NAME "vmxnet3" + +/* #define VMXNET_DEBUG_CB */ +#define VMXNET_DEBUG_WARNINGS +#define VMXNET_DEBUG_ERRORS +/* #define VMXNET_DEBUG_INTERRUPTS */ +/* #define VMXNET_DEBUG_CONFIG */ +/* #define VMXNET_DEBUG_RINGS */ +/* #define VMXNET_DEBUG_PACKETS */ +/* #define VMXNET_DEBUG_SHMEM_ACCESS */ + +#ifdef VMXNET_DEBUG_SHMEM_ACCESS +#define VMW_SHPRN(fmt, ...) \ + do { \ + printf("[%s][SH][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \ + ## __VA_ARGS__); \ + } while (0) +#else +#define VMW_SHPRN(fmt, ...) do {} while (0) +#endif + +#ifdef VMXNET_DEBUG_CB +#define VMW_CBPRN(fmt, ...) \ + do { \ + printf("[%s][CB][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \ + ## __VA_ARGS__); \ + } while (0) +#else +#define VMW_CBPRN(fmt, ...) do {} while (0) +#endif + +#ifdef VMXNET_DEBUG_PACKETS +#define VMW_PKPRN(fmt, ...) \ + do { \ + printf("[%s][PK][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \ + ## __VA_ARGS__); \ + } while (0) +#else +#define VMW_PKPRN(fmt, ...) do {} while (0) +#endif + +#ifdef VMXNET_DEBUG_WARNINGS +#define VMW_WRPRN(fmt, ...) \ + do { \ + printf("[%s][WR][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \ + ## __VA_ARGS__); \ + } while (0) +#else +#define VMW_WRPRN(fmt, ...) do {} while (0) +#endif + +#ifdef VMXNET_DEBUG_ERRORS +#define VMW_ERPRN(fmt, ...) \ + do { \ + printf("[%s][ER][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \ + ## __VA_ARGS__); \ + } while (0) +#else +#define VMW_ERPRN(fmt, ...) do {} while (0) +#endif + +#ifdef VMXNET_DEBUG_INTERRUPTS +#define VMW_IRPRN(fmt, ...) \ + do { \ + printf("[%s][IR][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \ + ## __VA_ARGS__); \ + } while (0) +#else +#define VMW_IRPRN(fmt, ...) do {} while (0) +#endif + +#ifdef VMXNET_DEBUG_CONFIG +#define VMW_CFPRN(fmt, ...) \ + do { \ + printf("[%s][CF][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \ + ## __VA_ARGS__); \ + } while (0) +#else +#define VMW_CFPRN(fmt, ...) do {} while (0) +#endif + +#ifdef VMXNET_DEBUG_RINGS +#define VMW_RIPRN(fmt, ...) \ + do { \ + printf("[%s][RI][%s]: " fmt "\n", VMXNET_DEVICE_NAME, __func__, \ + ## __VA_ARGS__); \ + } while (0) +#else +#define VMW_RIPRN(fmt, ...) do {} while (0) +#endif + +#define VMXNET_MF "%02X:%02X:%02X:%02X:%02X:%02X" +#define VMXNET_MA(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5] + +#endif /* _QEMU_VMXNET3_DEBUG_H */ diff --git a/include/net/eth.h b/include/net/eth.h new file mode 100644 index 0000000000..1d48e06b22 --- /dev/null +++ b/include/net/eth.h @@ -0,0 +1,347 @@ +/* + * QEMU network structures definitions and helper functions + * + * Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com) + * + * Developed by Daynix Computing LTD (http://www.daynix.com) + * + * Portions developed by Free Software Foundation, Inc + * Copyright (C) 1991-1997, 2001, 2003, 2006 Free Software Foundation, Inc. + * See netinet/ip6.h and netinet/in.h (GNU C Library) + * + * Portions developed by Igor Kovalenko + * Copyright (c) 2006 Igor Kovalenko + * See hw/rtl8139.c (QEMU) + * + * Authors: + * Dmitry Fleytman <dmitry@daynix.com> + * Tamir Shomer <tamirs@daynix.com> + * Yan Vugenfirer <yan@daynix.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#ifndef QEMU_ETH_H +#define QEMU_ETH_H + +#include <sys/types.h> +#include <string.h> +#include "qemu/bswap.h" +#include "qemu/iov.h" + +#define ETH_ALEN 6 + +struct eth_header { + uint8_t h_dest[ETH_ALEN]; /* destination eth addr */ + uint8_t h_source[ETH_ALEN]; /* source ether addr */ + uint16_t h_proto; /* packet type ID field */ +}; + +struct vlan_header { + uint16_t h_tci; /* priority and VLAN ID */ + uint16_t h_proto; /* encapsulated protocol */ +}; + +struct ip_header { + uint8_t ip_ver_len; /* version and header length */ + uint8_t ip_tos; /* type of service */ + uint16_t ip_len; /* total length */ + uint16_t ip_id; /* identification */ + uint16_t ip_off; /* fragment offset field */ + uint8_t ip_ttl; /* time to live */ + uint8_t ip_p; /* protocol */ + uint16_t ip_sum; /* checksum */ + uint32_t ip_src, ip_dst; /* source and destination address */ +}; + +typedef struct tcp_header { + uint16_t th_sport; /* source port */ + uint16_t th_dport; /* destination port */ + uint32_t th_seq; /* sequence number */ + uint32_t th_ack; /* acknowledgment number */ + uint16_t th_offset_flags; /* data offset, reserved 6 bits, */ + /* TCP protocol flags */ + uint16_t th_win; /* window */ + uint16_t th_sum; /* checksum */ + uint16_t th_urp; /* urgent pointer */ +} tcp_header; + +typedef struct udp_header { + uint16_t uh_sport; /* source port */ + uint16_t uh_dport; /* destination port */ + uint16_t uh_ulen; /* udp length */ + uint16_t uh_sum; /* udp checksum */ +} udp_header; + +typedef struct ip_pseudo_header { + uint32_t ip_src; + uint32_t ip_dst; + uint8_t zeros; + uint8_t ip_proto; + uint16_t ip_payload; +} ip_pseudo_header; + +/* IPv6 address */ +struct in6_addr { + union { + uint8_t __u6_addr8[16]; + } __in6_u; +}; + +struct ip6_header { + union { + struct ip6_hdrctl { + uint32_t ip6_un1_flow; /* 4 bits version, 8 bits TC, + 20 bits flow-ID */ + uint16_t ip6_un1_plen; /* payload length */ + uint8_t ip6_un1_nxt; /* next header */ + uint8_t ip6_un1_hlim; /* hop limit */ + } ip6_un1; + uint8_t ip6_un2_vfc; /* 4 bits version, top 4 bits tclass */ + struct ip6_ecn_access { + uint8_t ip6_un3_vfc; /* 4 bits version, top 4 bits tclass */ + uint8_t ip6_un3_ecn; /* 2 bits ECN, top 6 bits payload length */ + } ip6_un3; + } ip6_ctlun; + struct in6_addr ip6_src; /* source address */ + struct in6_addr ip6_dst; /* destination address */ +}; + +struct ip6_ext_hdr { + uint8_t ip6r_nxt; /* next header */ + uint8_t ip6r_len; /* length in units of 8 octets */ +}; + +struct udp_hdr { + uint16_t uh_sport; /* source port */ + uint16_t uh_dport; /* destination port */ + uint16_t uh_ulen; /* udp length */ + uint16_t uh_sum; /* udp checksum */ +}; + +struct tcp_hdr { + u_short th_sport; /* source port */ + u_short th_dport; /* destination port */ + uint32_t th_seq; /* sequence number */ + uint32_t th_ack; /* acknowledgment number */ +#ifdef HOST_WORDS_BIGENDIAN + u_char th_off : 4, /* data offset */ + th_x2:4; /* (unused) */ +#else + u_char th_x2 : 4, /* (unused) */ + th_off:4; /* data offset */ +#endif + +#define TH_ELN 0x1 /* explicit loss notification */ +#define TH_ECN 0x2 /* explicit congestion notification */ +#define TH_FS 0x4 /* fast start */ + + u_char th_flags; +#define TH_FIN 0x01 +#define TH_SYN 0x02 +#define TH_RST 0x04 +#define TH_PUSH 0x08 +#define TH_ACK 0x10 +#define TH_URG 0x20 + u_short th_win; /* window */ + u_short th_sum; /* checksum */ + u_short th_urp; /* urgent pointer */ +}; + +#define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt +#define ip6_ecn_acc ip6_ctlun.ip6_un3.ip6_un3_ecn + +#define PKT_GET_ETH_HDR(p) \ + ((struct eth_header *)(p)) +#define PKT_GET_VLAN_HDR(p) \ + ((struct vlan_header *) (((uint8_t *)(p)) + sizeof(struct eth_header))) +#define PKT_GET_DVLAN_HDR(p) \ + (PKT_GET_VLAN_HDR(p) + 1) +#define PKT_GET_IP_HDR(p) \ + ((struct ip_header *)(((uint8_t *)(p)) + eth_get_l2_hdr_length(p))) +#define IP_HDR_GET_LEN(p) \ + ((((struct ip_header *)p)->ip_ver_len & 0x0F) << 2) +#define PKT_GET_IP_HDR_LEN(p) \ + (IP_HDR_GET_LEN(PKT_GET_IP_HDR(p))) +#define PKT_GET_IP6_HDR(p) \ + ((struct ip6_header *) (((uint8_t *)(p)) + eth_get_l2_hdr_length(p))) +#define IP_HEADER_VERSION(ip) \ + ((ip->ip_ver_len >> 4)&0xf) + +#define ETH_P_IP (0x0800) +#define ETH_P_IPV6 (0x86dd) +#define ETH_P_VLAN (0x8100) +#define ETH_P_DVLAN (0x88a8) +#define VLAN_VID_MASK 0x0fff +#define IP_HEADER_VERSION_4 (4) +#define IP_HEADER_VERSION_6 (6) +#define IP_PROTO_TCP (6) +#define IP_PROTO_UDP (17) +#define IPTOS_ECN_MASK 0x03 +#define IPTOS_ECN(x) ((x) & IPTOS_ECN_MASK) +#define IPTOS_ECN_CE 0x03 +#define IP6_ECN_MASK 0xC0 +#define IP6_ECN(x) ((x) & IP6_ECN_MASK) +#define IP6_ECN_CE 0xC0 +#define IP4_DONT_FRAGMENT_FLAG (1 << 14) + +#define IS_SPECIAL_VLAN_ID(x) \ + (((x) == 0) || ((x) == 0xFFF)) + +#define ETH_MAX_L2_HDR_LEN \ + (sizeof(struct eth_header) + 2 * sizeof(struct vlan_header)) + +#define ETH_MAX_IP4_HDR_LEN (60) +#define ETH_MAX_IP_DGRAM_LEN (0xFFFF) + +#define IP_FRAG_UNIT_SIZE (8) +#define IP_FRAG_ALIGN_SIZE(x) ((x) & ~0x7) +#define IP_RF 0x8000 /* reserved fragment flag */ +#define IP_DF 0x4000 /* don't fragment flag */ +#define IP_MF 0x2000 /* more fragments flag */ +#define IP_OFFMASK 0x1fff /* mask for fragmenting bits */ + +#define IP6_EXT_GRANULARITY (8) /* Size granularity for + IPv6 extension headers */ + +/* IP6 extension header types */ +#define IP6_HOP_BY_HOP (0) +#define IP6_ROUTING (43) +#define IP6_FRAGMENT (44) +#define IP6_ESP (50) +#define IP6_AUTHENTICATION (51) +#define IP6_NONE (59) +#define IP6_DESTINATON (60) +#define IP6_MOBILITY (135) + +static inline int is_multicast_ether_addr(const uint8_t *addr) +{ + return 0x01 & addr[0]; +} + +static inline int is_broadcast_ether_addr(const uint8_t *addr) +{ + return (addr[0] & addr[1] & addr[2] & addr[3] & addr[4] & addr[5]) == 0xff; +} + +static inline int is_unicast_ether_addr(const uint8_t *addr) +{ + return !is_multicast_ether_addr(addr); +} + +typedef enum { + ETH_PKT_UCAST = 0xAABBCC00, + ETH_PKT_BCAST, + ETH_PKT_MCAST +} eth_pkt_types_e; + +static inline eth_pkt_types_e +get_eth_packet_type(const struct eth_header *ehdr) +{ + if (is_broadcast_ether_addr(ehdr->h_dest)) { + return ETH_PKT_BCAST; + } else if (is_multicast_ether_addr(ehdr->h_dest)) { + return ETH_PKT_MCAST; + } else { /* unicast */ + return ETH_PKT_UCAST; + } +} + +static inline uint32_t +eth_get_l2_hdr_length(const void *p) +{ + uint16_t proto = be16_to_cpu(PKT_GET_ETH_HDR(p)->h_proto); + struct vlan_header *hvlan = PKT_GET_VLAN_HDR(p); + switch (proto) { + case ETH_P_VLAN: + return sizeof(struct eth_header) + sizeof(struct vlan_header); + case ETH_P_DVLAN: + if (hvlan->h_proto == ETH_P_VLAN) { + return sizeof(struct eth_header) + 2 * sizeof(struct vlan_header); + } else { + return sizeof(struct eth_header) + sizeof(struct vlan_header); + } + default: + return sizeof(struct eth_header); + } +} + +static inline uint16_t +eth_get_pkt_tci(const void *p) +{ + uint16_t proto = be16_to_cpu(PKT_GET_ETH_HDR(p)->h_proto); + struct vlan_header *hvlan = PKT_GET_VLAN_HDR(p); + switch (proto) { + case ETH_P_VLAN: + case ETH_P_DVLAN: + return be16_to_cpu(hvlan->h_tci); + default: + return 0; + } +} + +static inline bool +eth_strip_vlan(const void *p, uint8_t *new_ehdr_buf, + uint16_t *payload_offset, uint16_t *tci) +{ + uint16_t proto = be16_to_cpu(PKT_GET_ETH_HDR(p)->h_proto); + struct vlan_header *hvlan = PKT_GET_VLAN_HDR(p); + struct eth_header *new_ehdr = (struct eth_header *) new_ehdr_buf; + + switch (proto) { + case ETH_P_VLAN: + case ETH_P_DVLAN: + memcpy(new_ehdr->h_source, PKT_GET_ETH_HDR(p)->h_source, ETH_ALEN); + memcpy(new_ehdr->h_dest, PKT_GET_ETH_HDR(p)->h_dest, ETH_ALEN); + new_ehdr->h_proto = hvlan->h_proto; + *tci = be16_to_cpu(hvlan->h_tci); + *payload_offset = + sizeof(struct eth_header) + sizeof(struct vlan_header); + if (be16_to_cpu(new_ehdr->h_proto) == ETH_P_VLAN) { + memcpy(PKT_GET_VLAN_HDR(new_ehdr), + PKT_GET_DVLAN_HDR(p), + sizeof(struct vlan_header)); + *payload_offset += sizeof(struct vlan_header); + } + return true; + default: + return false; + } +} + +static inline uint16_t +eth_get_l3_proto(const void *l2hdr, size_t l2hdr_len) +{ + uint8_t *proto_ptr = (uint8_t *) l2hdr + l2hdr_len - sizeof(uint16_t); + return be16_to_cpup((uint16_t *)proto_ptr); +} + +void eth_setup_vlan_headers(struct eth_header *ehdr, uint16_t vlan_tag, + bool *is_new); + +uint8_t eth_get_gso_type(uint16_t l3_proto, uint8_t *l3_hdr, uint8_t l4proto); + +void eth_get_protocols(const uint8_t *headers, + uint32_t hdr_length, + bool *isip4, bool *isip6, + bool *isudp, bool *istcp); + +void eth_setup_ip4_fragmentation(const void *l2hdr, size_t l2hdr_len, + void *l3hdr, size_t l3hdr_len, + size_t l3payload_len, + size_t frag_offset, bool more_frags); + +void +eth_fix_ip4_checksum(void *l3hdr, size_t l3hdr_len); + +uint32_t +eth_calc_pseudo_hdr_csum(struct ip_header *iphdr, uint16_t csl); + +bool +eth_parse_ipv6_hdr(struct iovec *pkt, int pkt_frags, + size_t ip6hdr_off, uint8_t *l4proto, + size_t *full_hdr_len); + +#endif diff --git a/net/Makefile.objs b/net/Makefile.objs index a08cd14e2e..4854a14fe4 100644 --- a/net/Makefile.objs +++ b/net/Makefile.objs @@ -1,6 +1,7 @@ common-obj-y = net.o queue.o checksum.o util.o hub.o common-obj-y += socket.o common-obj-y += dump.o +common-obj-y += eth.o common-obj-$(CONFIG_POSIX) += tap.o common-obj-$(CONFIG_LINUX) += tap-linux.o common-obj-$(CONFIG_WIN32) += tap-win32.o diff --git a/net/eth.c b/net/eth.c new file mode 100644 index 0000000000..1d7494d5e5 --- /dev/null +++ b/net/eth.c @@ -0,0 +1,217 @@ +/* + * QEMU network structures definitions and helper functions + * + * Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com) + * + * Developed by Daynix Computing LTD (http://www.daynix.com) + * + * Authors: + * Dmitry Fleytman <dmitry@daynix.com> + * Tamir Shomer <tamirs@daynix.com> + * Yan Vugenfirer <yan@daynix.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "net/eth.h" +#include "net/checksum.h" +#include "qemu-common.h" +#include "net/tap.h" + +void eth_setup_vlan_headers(struct eth_header *ehdr, uint16_t vlan_tag, + bool *is_new) +{ + struct vlan_header *vhdr = PKT_GET_VLAN_HDR(ehdr); + + switch (be16_to_cpu(ehdr->h_proto)) { + case ETH_P_VLAN: + case ETH_P_DVLAN: + /* vlan hdr exists */ + *is_new = false; + break; + + default: + /* No VLAN header, put a new one */ + vhdr->h_proto = ehdr->h_proto; + ehdr->h_proto = cpu_to_be16(ETH_P_VLAN); + *is_new = true; + break; + } + vhdr->h_tci = cpu_to_be16(vlan_tag); +} + +uint8_t +eth_get_gso_type(uint16_t l3_proto, uint8_t *l3_hdr, uint8_t l4proto) +{ + uint8_t ecn_state = 0; + + if (l3_proto == ETH_P_IP) { + struct ip_header *iphdr = (struct ip_header *) l3_hdr; + + if (IP_HEADER_VERSION(iphdr) == IP_HEADER_VERSION_4) { + if (IPTOS_ECN(iphdr->ip_tos) == IPTOS_ECN_CE) { + ecn_state = VIRTIO_NET_HDR_GSO_ECN; + } + if (l4proto == IP_PROTO_TCP) { + return VIRTIO_NET_HDR_GSO_TCPV4 | ecn_state; + } else if (l4proto == IP_PROTO_UDP) { + return VIRTIO_NET_HDR_GSO_UDP | ecn_state; + } + } + } else if (l3_proto == ETH_P_IPV6) { + struct ip6_header *ip6hdr = (struct ip6_header *) l3_hdr; + + if (IP6_ECN(ip6hdr->ip6_ecn_acc) == IP6_ECN_CE) { + ecn_state = VIRTIO_NET_HDR_GSO_ECN; + } + + if (l4proto == IP_PROTO_TCP) { + return VIRTIO_NET_HDR_GSO_TCPV6 | ecn_state; + } + } + + /* Unsupported offload */ + assert(false); + + return VIRTIO_NET_HDR_GSO_NONE | ecn_state; +} + +void eth_get_protocols(const uint8_t *headers, + uint32_t hdr_length, + bool *isip4, bool *isip6, + bool *isudp, bool *istcp) +{ + int proto; + size_t l2hdr_len = eth_get_l2_hdr_length(headers); + assert(hdr_length >= eth_get_l2_hdr_length(headers)); + *isip4 = *isip6 = *isudp = *istcp = false; + + proto = eth_get_l3_proto(headers, l2hdr_len); + if (proto == ETH_P_IP) { + *isip4 = true; + + struct ip_header *iphdr; + + assert(hdr_length >= + eth_get_l2_hdr_length(headers) + sizeof(struct ip_header)); + + iphdr = PKT_GET_IP_HDR(headers); + + if (IP_HEADER_VERSION(iphdr) == IP_HEADER_VERSION_4) { + if (iphdr->ip_p == IP_PROTO_TCP) { + *istcp = true; + } else if (iphdr->ip_p == IP_PROTO_UDP) { + *isudp = true; + } + } + } else if (proto == ETH_P_IPV6) { + uint8_t l4proto; + size_t full_ip6hdr_len; + + struct iovec hdr_vec; + hdr_vec.iov_base = (void *) headers; + hdr_vec.iov_len = hdr_length; + + *isip6 = true; + if (eth_parse_ipv6_hdr(&hdr_vec, 1, l2hdr_len, + &l4proto, &full_ip6hdr_len)) { + if (l4proto == IP_PROTO_TCP) { + *istcp = true; + } else if (l4proto == IP_PROTO_UDP) { + *isudp = true; + } + } + } +} + +void +eth_setup_ip4_fragmentation(const void *l2hdr, size_t l2hdr_len, + void *l3hdr, size_t l3hdr_len, + size_t l3payload_len, + size_t frag_offset, bool more_frags) +{ + if (eth_get_l3_proto(l2hdr, l2hdr_len) == ETH_P_IP) { + uint16_t orig_flags; + struct ip_header *iphdr = (struct ip_header *) l3hdr; + uint16_t frag_off_units = frag_offset / IP_FRAG_UNIT_SIZE; + uint16_t new_ip_off; + + assert(frag_offset % IP_FRAG_UNIT_SIZE == 0); + assert((frag_off_units & ~IP_OFFMASK) == 0); + + orig_flags = be16_to_cpu(iphdr->ip_off) & ~(IP_OFFMASK|IP_MF); + new_ip_off = frag_off_units | orig_flags | (more_frags ? IP_MF : 0); + iphdr->ip_off = cpu_to_be16(new_ip_off); + iphdr->ip_len = cpu_to_be16(l3payload_len + l3hdr_len); + } +} + +void +eth_fix_ip4_checksum(void *l3hdr, size_t l3hdr_len) +{ + struct ip_header *iphdr = (struct ip_header *) l3hdr; + iphdr->ip_sum = 0; + iphdr->ip_sum = cpu_to_be16(net_raw_checksum(l3hdr, l3hdr_len)); +} + +uint32_t +eth_calc_pseudo_hdr_csum(struct ip_header *iphdr, uint16_t csl) +{ + struct ip_pseudo_header ipph; + ipph.ip_src = iphdr->ip_src; + ipph.ip_dst = iphdr->ip_dst; + ipph.ip_payload = cpu_to_be16(csl); + ipph.ip_proto = iphdr->ip_p; + ipph.zeros = 0; + return net_checksum_add(sizeof(ipph), (uint8_t *) &ipph); +} + +static bool +eth_is_ip6_extension_header_type(uint8_t hdr_type) +{ + switch (hdr_type) { + case IP6_HOP_BY_HOP: + case IP6_ROUTING: + case IP6_FRAGMENT: + case IP6_ESP: + case IP6_AUTHENTICATION: + case IP6_DESTINATON: + case IP6_MOBILITY: + return true; + default: + return false; + } +} + +bool eth_parse_ipv6_hdr(struct iovec *pkt, int pkt_frags, + size_t ip6hdr_off, uint8_t *l4proto, + size_t *full_hdr_len) +{ + struct ip6_header ip6_hdr; + struct ip6_ext_hdr ext_hdr; + size_t bytes_read; + + bytes_read = iov_to_buf(pkt, pkt_frags, ip6hdr_off, + &ip6_hdr, sizeof(ip6_hdr)); + if (bytes_read < sizeof(ip6_hdr)) { + return false; + } + + *full_hdr_len = sizeof(struct ip6_header); + + if (!eth_is_ip6_extension_header_type(ip6_hdr.ip6_nxt)) { + *l4proto = ip6_hdr.ip6_nxt; + return true; + } + + do { + bytes_read = iov_to_buf(pkt, pkt_frags, ip6hdr_off + *full_hdr_len, + &ext_hdr, sizeof(ext_hdr)); + *full_hdr_len += (ext_hdr.ip6r_len + 1) * IP6_EXT_GRANULARITY; + } while (eth_is_ip6_extension_header_type(ext_hdr.ip6r_nxt)); + + *l4proto = ext_hdr.ip6r_nxt; + return true; +} |