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; }
static int ctrl_list(int cmd, int argc, char **argv) { struct rtnl_handle rth; int ret = -1; char d[GENL_NAMSIZ]; struct { struct nlmsghdr n; struct genlmsghdr g; char buf[4096]; } req = { .n.nlmsg_len = NLMSG_LENGTH(GENL_HDRLEN), .n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK, .n.nlmsg_type = GENL_ID_CTRL, .g.cmd = CTRL_CMD_GETFAMILY, }; struct nlmsghdr *nlh = &req.n; 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, nlh, sizeof(req)) < 0) { fprintf(stderr, "Error talking to the kernel\n"); goto ctrl_done; } if (print_ctrl2(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, nlh, nlh->nlmsg_len) < 0) { perror("Failed to send dump request\n"); goto ctrl_done; } rtnl_dump_filter(&rth, print_ctrl2, stdout); } 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; }