12 #include <netlink/cli/utils.h> 13 #include <netlink/route/pktloc.h> 14 #include <linux/tc_ematch/tc_em_cmp.h> 16 static void print_usage(
void)
19 "Usage: nl-pktloc-lookup [OPTIONS] <name>\n" 22 " -h, --help Show this help text.\n" 23 " -v, --version Show versioning information.\n" 24 " -l, --list List all packet location definitions.\n" 25 " --u32=VALUE Print in iproute2's u32 selector style\n" 29 " $ nl-pktloc-lookup ip.dst\n" 30 " $ nl-pktloc-lookup --list\n" 36 static const char *align_txt[] = {
37 [TCF_EM_ALIGN_U8] =
"u8",
38 [TCF_EM_ALIGN_U16] =
"u16",
39 [TCF_EM_ALIGN_U32] =
"u32" 42 static uint32_t align_mask[] = {
43 [TCF_EM_ALIGN_U8] = 0xff,
44 [TCF_EM_ALIGN_U16] = 0xffff,
45 [TCF_EM_ALIGN_U32] = 0xffffffff,
48 static const char *layer_txt[] = {
49 [TCF_LAYER_LINK] =
"eth",
50 [TCF_LAYER_NETWORK] =
"ip",
51 [TCF_LAYER_TRANSPORT] =
"tcp" 54 static void dump_u32_style(
struct rtnl_pktloc *loc, uint32_t value)
57 nl_cli_fatal(EINVAL,
"u32 only supports alignments u8|u16|u32.");
59 if (loc->layer == TCF_LAYER_LINK)
66 printf(
"%s %x %x at %s%u\n",
67 align_txt[loc->align],
68 value, loc->mask ? loc->mask : align_mask[loc->align],
69 loc->layer == TCF_LAYER_TRANSPORT ?
"nexthdr+" :
"",
78 strcpy(buf, align_txt[loc->align]);
80 snprintf(buf,
sizeof(buf),
"%u", loc->align);
87 printf(
"%s = %s at %s+%u & %#x >> %u\n",
88 loc->name, get_align_txt(loc), layer_txt[loc->layer],
89 loc->offset, loc->mask, loc->shift);
92 static void list_cb(
struct rtnl_pktloc *loc,
void *arg)
94 printf(
"%-26s %-5s %3s+%-4u %#-10x %-8u %u\n",
95 loc->name, get_align_txt(loc), layer_txt[loc->layer],
96 loc->offset, loc->mask, loc->shift, loc->refcnt);
99 static void do_list(
void)
102 "name align offset mask shift refcnt\n");
103 printf(
"---------------------------------------------------------\n");
105 rtnl_pktloc_foreach(&list_cb, NULL);
108 int main(
int argc,
char *argv[])
119 static struct option long_opts[] = {
120 {
"help", 0, 0,
'h' },
121 {
"version", 0, 0,
'v' },
122 {
"list", 0, 0,
'l' },
123 {
"u32", 1, 0, ARG_U32 },
127 c = getopt_long(argc, argv,
"hvl", long_opts, &optidx);
132 case 'h': print_usage();
break;
133 case 'v': nl_cli_print_version();
break;
134 case 'l': do_list(); exit(0);
146 nl_cli_fatal(err,
"Unable to lookup packet location: %s",
150 dump_u32_style(loc, uvalue);
uint32_t nl_cli_parse_u32(const char *arg)
Parse a text based 32 bit unsigned integer argument.
void nl_cli_fatal(int err, const char *fmt,...)
Print error message and quit application.
int rtnl_pktloc_lookup(const char *name, struct rtnl_pktloc **result)
Lookup packet location alias.