--- /dev/null
+/*
+ * ctrl.c generic netlink controller
+ *
+ * This program is free software; you can distribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: J Hadi Salim (hadi@cyberus.ca)
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+
+#include "utils.h"
+#include "genl_utils.h"
+
+static int usage(void)
+{
+ fprintf(stderr,"Usage: ctrl <CMD>\n" \
+ "CMD := get <PARMS> | list | monitor\n" \
+ "PARMS := name <name> | id <id>\n" \
+ "Examples:\n" \
+ "\tctrl ls\n" \
+ "\tctrl monitor\n" \
+ "\tctrl get name foobar\n" \
+ "\tctrl get id 0xF\n");
+ return -1;
+}
+
+int genl_ctrl_resolve_family(const char *family)
+{
+ struct rtnl_handle rth;
+ struct nlmsghdr *nlh;
+ struct genlmsghdr *ghdr;
+ int ret = 0;
+ struct {
+ struct nlmsghdr n;
+ char buf[4096];
+ } req;
+
+ memset(&req, 0, sizeof(req));
+
+ nlh = &req.n;
+ nlh->nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
+ nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ nlh->nlmsg_type = GENL_ID_CTRL;
+
+ ghdr = NLMSG_DATA(&req.n);
+ ghdr->cmd = CTRL_CMD_GETFAMILY;
+
+ if (rtnl_open_byproto(&rth, 0, NETLINK_GENERIC) < 0) {
+ fprintf(stderr, "Cannot open generic netlink socket\n");
+ exit(1);
+ }
+
+ addattr_l(nlh, 128, CTRL_ATTR_FAMILY_NAME, family, strlen(family) + 1);
+
+ if (rtnl_talk(&rth, nlh, 0, 0, nlh, NULL, NULL) < 0) {
+ fprintf(stderr, "Error talking to the kernel\n");
+ goto errout;
+ }
+
+ {
+ struct rtattr *tb[CTRL_ATTR_MAX + 1];
+ struct genlmsghdr *ghdr = NLMSG_DATA(nlh);
+ int len = nlh->nlmsg_len;
+ struct rtattr *attrs;
+
+ if (nlh->nlmsg_type != GENL_ID_CTRL) {
+ fprintf(stderr, "Not a controller message, nlmsg_len=%d "
+ "nlmsg_type=0x%x\n", nlh->nlmsg_len, nlh->nlmsg_type);
+ goto errout;
+ }
+
+ if (ghdr->cmd != CTRL_CMD_NEWFAMILY) {
+ fprintf(stderr, "Unkown controller command %d\n", ghdr->cmd);
+ goto errout;
+ }
+
+ len -= NLMSG_LENGTH(GENL_HDRLEN);
+
+ if (len < 0) {
+ fprintf(stderr, "wrong controller message len %d\n", len);
+ return -1;
+ }
+
+ attrs = (struct rtattr *) ((char *) ghdr + GENL_HDRLEN);
+ parse_rtattr(tb, CTRL_ATTR_MAX, attrs, len);
+
+ if (tb[CTRL_ATTR_FAMILY_ID] == NULL) {
+ fprintf(stderr, "Missing family id TLV\n");
+ goto errout;
+ }
+
+ ret = *(__u16 *) RTA_DATA(tb[CTRL_ATTR_FAMILY_ID]);
+ }
+
+errout:
+ rtnl_close(&rth);
+ return ret;
+}
+
+static int print_ctrl(const struct sockaddr_nl *who, struct nlmsghdr *n,
+ void *arg)
+{
+ struct rtattr *tb[CTRL_ATTR_MAX + 1];
+ struct genlmsghdr *ghdr = NLMSG_DATA(n);
+ int len = n->nlmsg_len;
+ struct rtattr *attrs;
+ FILE *fp = (FILE *) arg;
+
+ if (n->nlmsg_type != GENL_ID_CTRL) {
+ fprintf(stderr, "Not a controller message, nlmsg_len=%d "
+ "nlmsg_type=0x%x\n", n->nlmsg_len, n->nlmsg_type);
+ return 0;
+ }
+
+ if (ghdr->cmd != CTRL_CMD_GETFAMILY &&
+ ghdr->cmd != CTRL_CMD_DELFAMILY &&
+ ghdr->cmd != CTRL_CMD_NEWFAMILY) {
+ fprintf(stderr, "Unkown controller command %d\n", ghdr->cmd);
+ return 0;
+ }
+
+ len -= NLMSG_LENGTH(GENL_HDRLEN);
+
+ if (len < 0) {
+ fprintf(stderr, "wrong controller message len %d\n", len);
+ return -1;
+ }
+
+ attrs = (struct rtattr *) ((char *) ghdr + GENL_HDRLEN);
+ parse_rtattr(tb, CTRL_ATTR_MAX, attrs, len);
+
+ if (tb[CTRL_ATTR_FAMILY_NAME]) {
+ char *name = RTA_DATA(tb[CTRL_ATTR_FAMILY_NAME]);
+ fprintf(fp, "Name: %s\n",name);
+ }
+ if (tb[CTRL_ATTR_FAMILY_ID]) {
+ __u16 *id = RTA_DATA(tb[CTRL_ATTR_FAMILY_ID]);
+ fprintf(fp, "ID: 0x%x\n",*id);
+ }
+
+ fflush(fp);
+ return 0;
+}
+
+static int ctrl_list(int cmd, int argc, char **argv)
+{
+ struct rtnl_handle rth;
+ struct nlmsghdr *nlh;
+ struct genlmsghdr *ghdr;
+ int ret = -1;
+ char d[GENL_NAMSIZ];
+ struct {
+ struct nlmsghdr n;
+ char buf[4096];
+ } req;
+
+ memset(&req, 0, sizeof(req));
+
+ nlh = &req.n;
+ nlh->nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN);
+ nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ nlh->nlmsg_type = GENL_ID_CTRL;
+
+ ghdr = NLMSG_DATA(&req.n);
+ ghdr->cmd = CTRL_CMD_GETFAMILY;
+
+ if (rtnl_open_byproto(&rth, 0, NETLINK_GENERIC) < 0) {
+ fprintf(stderr, "Cannot open generic netlink socket\n");
+ exit(1);
+ }
+
+ if (cmd == CTRL_CMD_GETFAMILY) {
+ if (argc != 2) {
+ fprintf(stderr, "Wrong number of params\n");
+ return -1;
+ }
+
+ if (matches(*argv, "name") == 0) {
+ NEXT_ARG();
+ strncpy(d, *argv, sizeof (d) - 1);
+ addattr_l(nlh, 128, CTRL_ATTR_FAMILY_NAME,
+ d, strlen(d) + 1);
+ } else if (matches(*argv, "id") == 0) {
+ __u16 id;
+ NEXT_ARG();
+ if (get_u16(&id, *argv, 0)) {
+ fprintf(stderr, "Illegal \"id\"\n");
+ goto ctrl_done;
+ }
+
+ addattr_l(nlh, 128, CTRL_ATTR_FAMILY_ID, &id, 2);
+
+ } else {
+ fprintf(stderr, "Wrong params\n");
+ goto ctrl_done;
+ }
+
+ if (rtnl_talk(&rth, nlh, 0, 0, nlh, NULL, NULL) < 0) {
+ fprintf(stderr, "Error talking to the kernel\n");
+ goto ctrl_done;
+ }
+
+ if (print_ctrl(NULL, nlh, (void *) stdout) < 0) {
+ fprintf(stderr, "Dump terminated\n");
+ goto ctrl_done;
+ }
+
+ }
+
+ if (cmd == CTRL_CMD_UNSPEC) {
+ nlh->nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST;
+ nlh->nlmsg_seq = rth.dump = ++rth.seq;
+
+ if (rtnl_send(&rth, (const char *) nlh, nlh->nlmsg_len) < 0) {
+ perror("Failed to send dump request\n");
+ goto ctrl_done;
+ }
+
+ rtnl_dump_filter(&rth, print_ctrl, stdout, NULL, NULL);
+
+ }
+
+ ret = 0;
+ctrl_done:
+ rtnl_close(&rth);
+ return ret;
+}
+
+static int ctrl_listen(int argc, char **argv)
+{
+ struct rtnl_handle rth;
+
+ if (rtnl_open_byproto(&rth, nl_mgrp(GENL_ID_CTRL), NETLINK_GENERIC) < 0) {
+ fprintf(stderr, "Canot open generic netlink socket\n");
+ return -1;
+ }
+
+ if (rtnl_listen(&rth, print_ctrl, (void *) stdout) < 0)
+ return -1;
+
+ return 0;
+}
+
+static int parse_ctrl(struct genl_util *a, int argc, char **argv)
+{
+ argv++;
+ if (--argc <= 0) {
+ fprintf(stderr, "wrong controller params\n");
+ return -1;
+ }
+
+ if (matches(*argv, "monitor") == 0)
+ return ctrl_listen(argc-1, argv+1);
+ if (matches(*argv, "get") == 0)
+ return ctrl_list(CTRL_CMD_GETFAMILY, argc-1, argv+1);
+ if (matches(*argv, "list") == 0 ||
+ matches(*argv, "show") == 0 ||
+ matches(*argv, "lst") == 0)
+ return ctrl_list(CTRL_CMD_UNSPEC, argc-1, argv+1);
+ if (matches(*argv, "help") == 0)
+ return usage();
+
+ fprintf(stderr, "ctrl command \"%s\" is unknown, try \"ctrl -help\".\n",
+ *argv);
+
+ return -1;
+}
+
+struct genl_util ctrl_genl_util = {
+ .name = "ctrl",
+ .parse_genlopt = parse_ctrl,
+ .print_genlopt = print_ctrl,
+};
--- /dev/null
+/*
+ * genl.c "genl" utility frontend.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Jamal Hadi Salim
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <fcntl.h>
+#include <dlfcn.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <errno.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h> /* until we put our own header */
+#include "SNAPSHOT.h"
+#include "utils.h"
+#include "genl_utils.h"
+
+int show_stats = 0;
+int show_details = 0;
+int show_raw = 0;
+int resolve_hosts = 0;
+
+static void *BODY;
+static struct genl_util * genl_list;
+
+
+static int print_nofopt(const struct sockaddr_nl *who, struct nlmsghdr *n,
+ void *arg)
+{
+ fprintf((FILE *) arg, "unknown genl type ..\n");
+ return 0;
+}
+
+static int parse_nofopt(struct genl_util *f, int argc, char **argv)
+{
+ if (argc) {
+ fprintf(stderr, "Unknown genl \"%s\", hence option \"%s\" "
+ "is unparsable\n", f->name, *argv);
+ return -1;
+ }
+
+ return 0;
+}
+
+static struct genl_util *get_genl_kind(char *str)
+{
+ void *dlh;
+ char buf[256];
+ struct genl_util *f;
+
+ for (f = genl_list; f; f = f->next)
+ if (strcmp(f->name, str) == 0)
+ return f;
+
+ snprintf(buf, sizeof(buf), "%s.so", str);
+ dlh = dlopen(buf, RTLD_LAZY);
+ if (dlh == NULL) {
+ dlh = BODY;
+ if (dlh == NULL) {
+ dlh = BODY = dlopen(NULL, RTLD_LAZY);
+ if (dlh == NULL)
+ goto noexist;
+ }
+ }
+
+ snprintf(buf, sizeof(buf), "%s_genl_util", str);
+
+ f = dlsym(dlh, buf);
+ if (f == NULL)
+ goto noexist;
+reg:
+ f->next = genl_list;
+ genl_list = f;
+ return f;
+
+noexist:
+ f = malloc(sizeof(*f));
+ if (f) {
+ memset(f, 0, sizeof(*f));
+ strncpy(f->name, str, 15);
+ f->parse_genlopt = parse_nofopt;
+ f->print_genlopt = print_nofopt;
+ goto reg;
+ }
+ return f;
+}
+
+static void usage(void) __attribute__((noreturn));
+
+static void usage(void)
+{
+ fprintf(stderr, "Usage: genl [ OPTIONS ] OBJECT | help }\n"
+ "where OBJECT := { ctrl etc }\n"
+ " OPTIONS := { -s[tatistics] | -d[etails] | -r[aw] }\n");
+ exit(-1);
+}
+
+int main(int argc, char **argv)
+{
+ char *basename;
+
+ basename = strrchr(argv[0], '/');
+ if (basename == NULL)
+ basename = argv[0];
+ else
+ basename++;
+
+ while (argc > 1) {
+ if (argv[1][0] != '-')
+ break;
+ if (matches(argv[1], "-stats") == 0 ||
+ matches(argv[1], "-statistics") == 0) {
+ ++show_stats;
+ } else if (matches(argv[1], "-details") == 0) {
+ ++show_details;
+ } else if (matches(argv[1], "-raw") == 0) {
+ ++show_raw;
+ } else if (matches(argv[1], "-Version") == 0) {
+ printf("genl utility, iproute2-ss%s\n", SNAPSHOT);
+ exit(0);
+ } else if (matches(argv[1], "-help") == 0) {
+ usage();
+ } else {
+ fprintf(stderr, "Option \"%s\" is unknown, try "
+ "\"genl -help\".\n", argv[1]);
+ exit(-1);
+ }
+ argc--; argv++;
+ }
+
+ if (argc > 1) {
+ int ret;
+ struct genl_util *a = NULL;
+ a = get_genl_kind(argv[1]);
+ if (NULL == a) {
+ fprintf(stderr,"bad genl %s\n",argv[1]);
+ }
+
+ ret = a->parse_genlopt(a, argc-1, argv+1);
+ return ret;
+
+ if (matches(argv[1], "help") == 0)
+ usage();
+ fprintf(stderr, "Object \"%s\" is unknown, try \"genl "
+ "-help\".\n", argv[1]);
+ exit(-1);
+ }
+
+ usage();
+}
projects / mirror_iproute2.git / commitdiff