| /* |
| * 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(const 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 = calloc(1, sizeof(*f)); |
| if (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) |
| { |
| 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 (!a) { |
| fprintf(stderr,"bad genl %s\n", argv[1]); |
| exit(-1); |
| } |
| |
| ret = a->parse_genlopt(a, argc-1, argv+1); |
| return ret; |
| } |
| |
| usage(); |
| } |