diff options
| author | Dmitry V. Levin <ldv@strace.io> | 2021-02-03 08:00:00 +0000 |
|---|---|---|
| committer | Dmitry V. Levin <ldv@strace.io> | 2021-02-03 08:00:00 +0000 |
| commit | ecb3ed78107c851f71696df6730a15afff91ed3d (patch) | |
| tree | 0b3d2b083040fc9b08d129f80d027ff41b995059 /src/netlink_sock_diag.c | |
| parent | c47943de06204a269e16f732e7c9c71d4284b23f (diff) | |
| download | strace-ecb3ed78107c851f71696df6730a15afff91ed3d.tar.gz | |
Move source files into src subdirectory
* src/Makefile.am: New file.
* src/.gitignore: Likewise.
* scno.am: Move into src subdirectory.
* scno.head: Likewise.
* strace-graph: Likewise.
* strace-log-merge: Likewise.
* linux/: Likewise.
* types/: Likewise.
* xlat/: Likewise.
* *.awk: Likewise.
* *.c: Likewise.
* *.h: Likewise.
* *.sh: Likewise.
* .gitignore: Update.
* Makefile.am: Update.
* bootstrap: Update.
* configure.ac: Update.
* debian/rules: Update.
* debian/strace-udeb.install: Update.
* debian/strace.examples: Update.
* debian/strace.install: Update.
* debian/strace64.install: Update.
* m4/gen_bpf_attr_m4.sh: Update.
* m4/mpers.m4: Update.
* tests/Makefile.am: Update.
* tests/init.sh: Update.
* tests/legacy_syscall_info.test: Update.
* tests/strace-log-merge-error.test: Update.
* tests/strace-log-merge-suffix.test: Update.
Diffstat (limited to 'src/netlink_sock_diag.c')
| -rw-r--r-- | src/netlink_sock_diag.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/netlink_sock_diag.c b/src/netlink_sock_diag.c new file mode 100644 index 000000000..519ce2d81 --- /dev/null +++ b/src/netlink_sock_diag.c @@ -0,0 +1,75 @@ +/* + * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr> + * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com> + * Copyright (c) 2017-2018 The strace developers. + * All rights reserved. + * + * SPDX-License-Identifier: LGPL-2.1-or-later + */ + +#include "defs.h" +#include "netlink.h" +#include "netlink_sock_diag.h" + +#define XLAT_MACROS_ONLY +#include "xlat/addrfams.h" +#undef XLAT_MACROS_ONLY + +static void +decode_family(struct tcb *const tcp, const uint8_t family, + const kernel_ulong_t addr, const unsigned int len) +{ + tprint_struct_begin(); + tprints_field_name("family"); + printxval(addrfams, family, "AF_???"); + if (len > sizeof(family)) { + tprints(", "); + printstr_ex(tcp, addr + sizeof(family), + len - sizeof(family), QUOTE_FORCE_HEX); + } + tprint_struct_end(); +} + +typedef DECL_NETLINK_DIAG_DECODER((*netlink_diag_decoder_t)); + +static const struct { + const netlink_diag_decoder_t request, response; +} diag_decoders[] = { + [AF_UNIX] = { decode_unix_diag_req, decode_unix_diag_msg }, + [AF_INET] = { decode_inet_diag_req, decode_inet_diag_msg }, + [AF_INET6] = { decode_inet_diag_req, decode_inet_diag_msg }, + [AF_NETLINK] = { decode_netlink_diag_req, decode_netlink_diag_msg }, + [AF_PACKET] = { decode_packet_diag_req, decode_packet_diag_msg }, + [AF_SMC] = { decode_smc_diag_req, decode_smc_diag_msg }, +}; + +bool +decode_netlink_sock_diag(struct tcb *const tcp, + const struct nlmsghdr *const nlmsghdr, + const kernel_ulong_t addr, + const unsigned int len) +{ + uint8_t family; + + if (nlmsghdr->nlmsg_type == NLMSG_DONE) + return false; + + if (!umove_or_printaddr(tcp, addr, &family)) { + if (family < ARRAY_SIZE(diag_decoders) + && len > sizeof(family)) { + const netlink_diag_decoder_t decoder = + (nlmsghdr->nlmsg_flags & NLM_F_REQUEST) + ? diag_decoders[family].request + : diag_decoders[family].response; + + if (decoder) { + decoder(tcp, nlmsghdr, family, addr, len); + return true; + } + } + + decode_family(tcp, family, addr, len); + } + + return true; +} |