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qrtr-cfg: Introduce node-id configuration tool

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The final version of QRTR that was merged into v4.7 of the Linux kernel
requires a configuration step where we set the local node address.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Bjorn Andersson
2016-06-01 06:44:36 -07:00
parent a2cc96100c
commit d7c59006cb
2 changed files with 69 additions and 1 deletions
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5
Makefile
View File

@@ -15,6 +15,9 @@ CC := $(CROSS_COMPILE)gcc
endif
SFLAGS := -I$(shell $(CC) -print-file-name=include) -Wno-non-pointer-null
$(proj)-cfg-srcs := \
src/cfg.c
$(proj)-ns-srcs := \
src/ns.c \
src/map.c \
@@ -31,7 +34,7 @@ lib$(proj).so-srcs := \
lib$(proj).so-cflags := -fPIC -Isrc
targets := $(proj)-ns $(proj)-lookup lib$(proj).so
targets := $(proj)-ns $(proj)-cfg $(proj)-lookup lib$(proj).so
out := out
src_to_obj = $(patsubst %.c,$(out)/obj/%.o,$(1))

65
src/cfg.c Normal file
View File

@@ -0,0 +1,65 @@
#include <err.h>
#include <limits.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include "qrtr.h"
static void usage(void)
{
extern char *__progname;
fprintf(stderr, "%s <node-id>\n", __progname);
exit(1);
}
int main(int argc, char **argv)
{
struct {
struct nlmsghdr nh;
struct ifaddrmsg ifa;
char attrbuf[32];
} req;
struct rtattr *rta;
unsigned long addrul;
uint32_t addr;
char *ep;
int sock;
int ret;
if (argc != 2)
usage();
addrul = strtoul(argv[1], &ep, 10);
if (argv[1][0] == '\0' || *ep != '\0' || addrul >= UINT_MAX)
usage();
addr = addrul;
sock = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE);
if (sock < 0)
err(1, "failed to create netlink socket");
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_SPACE(sizeof(struct ifaddrmsg));
req.nh.nlmsg_flags = NLM_F_REQUEST;
req.nh.nlmsg_type = RTM_NEWADDR;
req.ifa.ifa_family = AF_QIPCRTR;
rta = (struct rtattr *)(((char *) &req) + req.nh.nlmsg_len);
rta->rta_type = IFA_LOCAL;
rta->rta_len = RTA_LENGTH(sizeof(addr));
memcpy(RTA_DATA(rta), &addr, sizeof(addr));
req.nh.nlmsg_len += rta->rta_len;
ret = send(sock, &req, req.nh.nlmsg_len, 0);
if (ret < 0)
err(1, "failed to send netlink request");
return 0;
}