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/*
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* genl.c "genl" utility frontend.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Jamal Hadi Salim
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <dlfcn.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include <errno.h>
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h> /* until we put our own header */
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#include "version.h"
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#include "utils.h"
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#include "genl_utils.h"
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int show_stats;
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int show_details;
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int show_raw;
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static void *BODY;
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static struct genl_util *genl_list;
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static int print_nofopt(struct nlmsghdr *n, void *arg)
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{
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fprintf((FILE *) arg, "unknown genl type ..\n");
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return 0;
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}
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static int parse_nofopt(struct genl_util *f, int argc, char **argv)
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{
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if (argc) {
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fprintf(stderr,
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"Unknown genl \"%s\", hence option \"%s\" is unparsable\n",
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f->name, *argv);
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return -1;
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}
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return 0;
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}
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static struct genl_util *get_genl_kind(const char *str)
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{
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void *dlh;
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char buf[256];
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struct genl_util *f;
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for (f = genl_list; f; f = f->next)
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if (strcmp(f->name, str) == 0)
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return f;
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snprintf(buf, sizeof(buf), "%s.so", str);
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dlh = dlopen(buf, RTLD_LAZY);
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if (dlh == NULL) {
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dlh = BODY;
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if (dlh == NULL) {
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dlh = BODY = dlopen(NULL, RTLD_LAZY);
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if (dlh == NULL)
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goto noexist;
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}
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}
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snprintf(buf, sizeof(buf), "%s_genl_util", str);
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f = dlsym(dlh, buf);
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if (f == NULL)
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goto noexist;
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reg:
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f->next = genl_list;
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genl_list = f;
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return f;
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noexist:
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f = calloc(1, sizeof(*f));
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if (f) {
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strncpy(f->name, str, 15);
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f->parse_genlopt = parse_nofopt;
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f->print_genlopt = print_nofopt;
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goto reg;
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}
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return f;
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}
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static void usage(void) __attribute__((noreturn));
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static void usage(void)
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{
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fprintf(stderr,
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"Usage: genl [ OPTIONS ] OBJECT [help] }\n"
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"where OBJECT := { ctrl etc }\n"
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" OPTIONS := { -s[tatistics] | -d[etails] | -r[aw] | -V[ersion] | -h[elp] }\n");
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exit(-1);
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}
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int main(int argc, char **argv)
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{
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while (argc > 1) {
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if (argv[1][0] != '-')
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break;
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if (matches(argv[1], "-stats") == 0 ||
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matches(argv[1], "-statistics") == 0) {
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++show_stats;
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} else if (matches(argv[1], "-details") == 0) {
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++show_details;
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} else if (matches(argv[1], "-raw") == 0) {
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++show_raw;
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} else if (matches(argv[1], "-Version") == 0) {
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printf("genl utility, iproute2-%s\n", version);
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exit(0);
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} else if (matches(argv[1], "-help") == 0) {
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usage();
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} else {
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fprintf(stderr,
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"Option \"%s\" is unknown, try \"genl -help\".\n",
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argv[1]);
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exit(-1);
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}
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argc--; argv++;
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}
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if (argc > 1) {
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struct genl_util *a;
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int ret;
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a = get_genl_kind(argv[1]);
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if (!a) {
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fprintf(stderr, "bad genl %s\n", argv[1]);
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exit(-1);
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}
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ret = a->parse_genlopt(a, argc-1, argv+1);
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return ret;
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}
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usage();
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}
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