diff options
Diffstat (limited to 'src/rtnl_rule.c')
| -rw-r--r-- | src/rtnl_rule.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/src/rtnl_rule.c b/src/rtnl_rule.c new file mode 100644 index 000000000..93492b800 --- /dev/null +++ b/src/rtnl_rule.c @@ -0,0 +1,143 @@ +/* + * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr> + * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com> + * Copyright (c) 2016-2019 The strace developers. + * All rights reserved. + * + * SPDX-License-Identifier: LGPL-2.1-or-later + */ + +#include "defs.h" + +#include "netlink_route.h" +#include "nlattr.h" + +#include "netlink.h" +#include "types/fib_rules.h" + +#include "xlat/fib_rule_actions.h" +#include "xlat/fib_rule_flags.h" +#include "xlat/rtnl_rule_attrs.h" + +static bool +decode_rule_addr(struct tcb *const tcp, + const kernel_ulong_t addr, + const unsigned int len, + const void *const opaque_data) +{ + const struct_fib_rule_hdr *const msg = opaque_data; + + decode_inet_addr(tcp, addr, len, msg->family, NULL); + + return true; +} + +static bool +decode_fib_rule_uid_range(struct tcb *const tcp, + const kernel_ulong_t addr, + const unsigned int len, + const void *const opaque_data) +{ + struct_fib_rule_uid_range range; + + if (len < sizeof(range)) + return false; + else if (!umove_or_printaddr(tcp, addr, &range)) { + tprint_struct_begin(); + PRINT_FIELD_U(range, start); + tprint_struct_next(); + PRINT_FIELD_U(range, end); + tprint_struct_end(); + } + + return true; +} + +static bool +decode_rule_port_range(struct tcb *const tcp, + const kernel_ulong_t addr, + const unsigned int len, + const void *const opaque_data) +{ + struct_fib_rule_port_range range; + + if (len < sizeof(range)) + return false; + else if (!umove_or_printaddr(tcp, addr, &range)) { + tprint_struct_begin(); + PRINT_FIELD_U(range, start); + tprint_struct_next(); + PRINT_FIELD_U(range, end); + tprint_struct_end(); + } + + return true; +} + +static const nla_decoder_t fib_rule_hdr_nla_decoders[] = { + [FRA_DST] = decode_rule_addr, + [FRA_SRC] = decode_rule_addr, + [FRA_IIFNAME] = decode_nla_str, + [FRA_GOTO] = decode_nla_u32, + [FRA_PRIORITY] = decode_nla_u32, + [FRA_FWMARK] = decode_nla_u32, + [FRA_FLOW] = decode_nla_u32, + [FRA_TUN_ID] = decode_nla_be64, + [FRA_SUPPRESS_IFGROUP] = decode_nla_u32, + [FRA_SUPPRESS_PREFIXLEN] = decode_nla_u32, + [FRA_TABLE] = decode_nla_rt_class, + [FRA_FWMASK] = decode_nla_u32, + [FRA_OIFNAME] = decode_nla_str, + [FRA_PAD] = NULL, + [FRA_L3MDEV] = decode_nla_u8, + [FRA_UID_RANGE] = decode_fib_rule_uid_range, + [FRA_PROTOCOL] = decode_nla_rt_proto, + [FRA_IP_PROTO] = decode_nla_ip_proto, + [FRA_SPORT_RANGE] = decode_rule_port_range, + [FRA_DPORT_RANGE] = decode_rule_port_range, +}; + +DECL_NETLINK_ROUTE_DECODER(decode_fib_rule_hdr) +{ + struct_fib_rule_hdr msg = { .family = family }; + size_t offset = sizeof(msg.family); + bool decode_nla = false; + + tprint_struct_begin(); + PRINT_FIELD_XVAL(msg, family, addrfams, "AF_???"); + + tprints(", "); + if (len >= sizeof(msg)) { + if (!umoven_or_printaddr(tcp, addr + offset, + sizeof(msg) - offset, + (char *) &msg + offset)) { + PRINT_FIELD_U(msg, dst_len); + tprint_struct_next(); + PRINT_FIELD_U(msg, src_len); + tprint_struct_next(); + PRINT_FIELD_FLAGS(msg, tos, + ip_type_of_services, "IPTOS_TOS_???"); + tprint_struct_next(); + PRINT_FIELD_XVAL(msg, table, + routing_table_ids, "RT_TABLE_???"); + tprint_struct_next(); + PRINT_FIELD_XVAL(msg, action, + fib_rule_actions, "FR_ACT_???"); + tprint_struct_next(); + PRINT_FIELD_FLAGS(msg, flags, + fib_rule_flags, "FIB_RULE_???"); + decode_nla = true; + } + } else + tprint_more_data_follows(); + tprint_struct_end(); + + offset = NLMSG_ALIGN(sizeof(msg)); + if (decode_nla && len > offset) { + tprints(", "); + decode_nlattr(tcp, addr + offset, len - offset, + rtnl_rule_attrs, "FRA_???", + fib_rule_hdr_nla_decoders, + ARRAY_SIZE(fib_rule_hdr_nla_decoders), &msg); + } +} |