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Add u32 extension to match on ether source/destination 

Use existing u32 mechanism to match based on Ethernet header.
No need for protocol that already exists.
This commit is contained in:
Stephen Hemminger 2009-04-15 15:39:34 -07:00
parent b9ab720e33
commit b4d41f41b6
1 changed files with 70 additions and 0 deletions
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70
tc/f_u32.c
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@ -405,6 +405,48 @@ static int parse_ip6_addr(int *argc_p, char ***argv_p,
return res;
}
static int parse_ether_addr(int *argc_p, char ***argv_p,
struct tc_u32_sel *sel, int off)
{
int res = -1;
int argc = *argc_p;
char **argv = *argv_p;
__u8 addr[6];
int offmask = 0;
__u32 key;
int i;
if (argc < 1)
return -1;
if (sscanf(*argv, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
addr + 0, addr + 1, addr + 2,
addr + 3, addr + 4, addr + 5) != 6) {
fprintf(stderr, "parse_ether_addr: improperly formed address '%s'\n",
*argv);
return -1;
}
argc--; argv++;
if (argc > 0 && strcmp(argv[0], "at") == 0) {
NEXT_ARG();
if (parse_at(&argc, &argv, &off, &offmask))
return -1;
}
for (i = 0; i < 6; i += 2) {
key = *(__u16 *) (addr + i);
res = pack_key16(sel, key, 0xFFFF, off + i, offmask);
if (res < 0)
return -1;
}
*argc_p = argc;
*argv_p = argv;
return res;
}
static int parse_ip(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
{
int res = -1;
@ -509,6 +551,31 @@ static int parse_ip6(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
return res;
}
static int parse_ether(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
{
int res = -1;
int argc = *argc_p;
char **argv = *argv_p;
if (argc < 2)
return -1;
if (strcmp(*argv, "src") == 0) {
NEXT_ARG();
res = parse_ether_addr(&argc, &argv, sel, -8);
} else if (strcmp(*argv, "dst") == 0) {
NEXT_ARG();
res = parse_ether_addr(&argc, &argv, sel, -14);
} else {
fprintf(stderr, "Unknown match: ether %s\n", *argv);
return -1;
}
*argc_p = argc;
*argv_p = argv;
return res;
}
#define parse_tcp parse_udp
static int parse_udp(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
{
@ -629,6 +696,9 @@ static int parse_selector(int *argc_p, char ***argv_p,
} else if (matches(*argv, "mark") == 0) {
NEXT_ARG();
res = parse_mark(&argc, &argv, n);
} else if (matches(*argv, "ether") == 0) {
NEXT_ARG();
res = parse_ether(&argc, &argv, sel);
} else
return -1;