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synced 2025-08-05 16:54:27 +00:00
b8ae9f70aa
Each YNL struct contains the data and a sub-struct indicating which
fields are valid. Something like:
struct family_op_req {
struct {
u32 a:1;
u32 b:1;
u32 bin_len;
} _present;
u32 a;
u64 b;
const unsigned char *bin;
};
Note that the bin object 'bin' has a length stored, and that length
has a _len suffix added to the field name. This breaks if there
is a explicit field called bin_len, which is the case for some
TC actions. Move the length fields out of the _present struct,
create a new struct called _len:
struct family_op_req {
struct {
u32 a:1;
u32 b:1;
} _present;
struct {
u32 bin;
} _len;
u32 a;
u64 b;
const unsigned char *bin;
};
This should prevent name collisions and help with the packing
of the struct.
Unfortunately this is a breaking change, but hopefully the migration
isn't too painful.
Link: https://patch.msgid.link/20250505165208.248049-3-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
80 lines
1.5 KiB
C
80 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <stdio.h>
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#include <string.h>
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#include <ynl.h>
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#include <arpa/inet.h>
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#include <net/if.h>
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#include "rt-addr-user.h"
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static void rt_addr_print(struct rt_addr_getaddr_rsp *a)
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{
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char ifname[IF_NAMESIZE];
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char addr_str[64];
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const char *addr;
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const char *name;
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name = if_indextoname(a->_hdr.ifa_index, ifname);
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if (name)
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printf("%16s: ", name);
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switch (a->_len.address) {
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case 4:
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addr = inet_ntop(AF_INET, a->address,
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addr_str, sizeof(addr_str));
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break;
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case 16:
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addr = inet_ntop(AF_INET6, a->address,
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addr_str, sizeof(addr_str));
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break;
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default:
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addr = NULL;
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break;
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}
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if (addr)
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printf("%s", addr);
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else
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printf("[%d]", a->_len.address);
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printf("\n");
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}
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int main(int argc, char **argv)
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{
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struct rt_addr_getaddr_list *rsp;
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struct rt_addr_getaddr_req *req;
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struct ynl_error yerr;
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struct ynl_sock *ys;
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ys = ynl_sock_create(&ynl_rt_addr_family, &yerr);
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if (!ys) {
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fprintf(stderr, "YNL: %s\n", yerr.msg);
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return 1;
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}
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req = rt_addr_getaddr_req_alloc();
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if (!req)
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goto err_destroy;
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rsp = rt_addr_getaddr_dump(ys, req);
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rt_addr_getaddr_req_free(req);
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if (!rsp)
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goto err_close;
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if (ynl_dump_empty(rsp))
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fprintf(stderr, "Error: no addresses reported\n");
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ynl_dump_foreach(rsp, addr)
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rt_addr_print(addr);
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rt_addr_getaddr_list_free(rsp);
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ynl_sock_destroy(ys);
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return 0;
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err_close:
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fprintf(stderr, "YNL: %s\n", ys->err.msg);
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err_destroy:
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ynl_sock_destroy(ys);
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return 2;
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}
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