diff options
Diffstat (limited to 'tc/tc.c')
| -rw-r--r-- | tc/tc.c | 357 |
1 files changed, 357 insertions, 0 deletions
@@ -0,0 +1,357 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * tc.c "tc" utility frontend. + * + * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.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 "version.h" +#include "utils.h" +#include "tc_util.h" +#include "tc_common.h" +#include "namespace.h" +#include "rt_names.h" +#include "bpf_util.h" + +int show_stats; +int show_details; +int show_raw; +int show_graph; +int timestamp; + +int batch_mode; +int use_iec; +int force; +bool use_names; +int json; +int oneline; +int brief; + +static char *conf_file; + +struct rtnl_handle rth; + +static void *BODY; /* cached handle dlopen(NULL) */ +static struct qdisc_util *qdisc_list; +static struct filter_util *filter_list; + +static int print_noqopt(struct qdisc_util *qu, FILE *f, + struct rtattr *opt) +{ + if (opt && RTA_PAYLOAD(opt)) + fprintf(f, "[Unknown qdisc, optlen=%u] ", + (unsigned int) RTA_PAYLOAD(opt)); + return 0; +} + +static int parse_noqopt(struct qdisc_util *qu, int argc, char **argv, + struct nlmsghdr *n, const char *dev) +{ + if (argc) { + fprintf(stderr, + "Unknown qdisc \"%s\", hence option \"%s\" is unparsable\n", + qu->id, *argv); + return -1; + } + return 0; +} + +static int print_nofopt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 fhandle) +{ + if (opt && RTA_PAYLOAD(opt)) + fprintf(f, "fh %08x [Unknown filter, optlen=%u] ", + fhandle, (unsigned int) RTA_PAYLOAD(opt)); + else if (fhandle) + fprintf(f, "fh %08x ", fhandle); + return 0; +} + +static int parse_nofopt(struct filter_util *qu, char *fhandle, + int argc, char **argv, struct nlmsghdr *n) +{ + __u32 handle; + + if (argc) { + fprintf(stderr, + "Unknown filter \"%s\", hence option \"%s\" is unparsable\n", + qu->id, *argv); + return -1; + } + if (fhandle) { + struct tcmsg *t = NLMSG_DATA(n); + + if (get_u32(&handle, fhandle, 16)) { + fprintf(stderr, "Unparsable filter ID \"%s\"\n", fhandle); + return -1; + } + t->tcm_handle = handle; + } + return 0; +} + +struct qdisc_util *get_qdisc_kind(const char *str) +{ + void *dlh; + char buf[256]; + struct qdisc_util *q; + + for (q = qdisc_list; q; q = q->next) + if (strcmp(q->id, str) == 0) + return q; + + snprintf(buf, sizeof(buf), "%s/q_%s.so", get_tc_lib(), str); + dlh = dlopen(buf, RTLD_LAZY); + if (!dlh) { + /* look in current binary, only open once */ + dlh = BODY; + if (dlh == NULL) { + dlh = BODY = dlopen(NULL, RTLD_LAZY); + if (dlh == NULL) + goto noexist; + } + } + + snprintf(buf, sizeof(buf), "%s_qdisc_util", str); + q = dlsym(dlh, buf); + if (q == NULL) + goto noexist; + +reg: + q->next = qdisc_list; + qdisc_list = q; + return q; + +noexist: + q = calloc(1, sizeof(*q)); + if (q) { + q->id = strdup(str); + q->parse_qopt = parse_noqopt; + q->print_qopt = print_noqopt; + goto reg; + } + return q; +} + + +struct filter_util *get_filter_kind(const char *str) +{ + void *dlh; + char buf[256]; + struct filter_util *q; + + for (q = filter_list; q; q = q->next) + if (strcmp(q->id, str) == 0) + return q; + + snprintf(buf, sizeof(buf), "%s/f_%s.so", get_tc_lib(), 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_filter_util", str); + q = dlsym(dlh, buf); + if (q == NULL) + goto noexist; + +reg: + q->next = filter_list; + filter_list = q; + return q; +noexist: + q = calloc(1, sizeof(*q)); + if (q) { + strncpy(q->id, str, 15); + q->parse_fopt = parse_nofopt; + q->print_fopt = print_nofopt; + goto reg; + } + return q; +} + +static void usage(void) +{ + fprintf(stderr, + "Usage: tc [ OPTIONS ] OBJECT { COMMAND | help }\n" + " tc [-force] -batch filename\n" + "where OBJECT := { qdisc | class | filter | chain |\n" + " action | monitor | exec }\n" + " OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[aw] |\n" + " -o[neline] | -j[son] | -p[retty] | -c[olor]\n" + " -b[atch] [filename] | -n[etns] name | -N[umeric] |\n" + " -nm | -nam[es] | { -cf | -conf } path\n" + " -br[ief] }\n"); +} + +static int do_cmd(int argc, char **argv) +{ + if (matches(*argv, "qdisc") == 0) + return do_qdisc(argc-1, argv+1); + if (matches(*argv, "class") == 0) + return do_class(argc-1, argv+1); + if (matches(*argv, "filter") == 0) + return do_filter(argc-1, argv+1); + if (matches(*argv, "chain") == 0) + return do_chain(argc-1, argv+1); + if (matches(*argv, "actions") == 0) + return do_action(argc-1, argv+1); + if (matches(*argv, "monitor") == 0) + return do_tcmonitor(argc-1, argv+1); + if (matches(*argv, "exec") == 0) + return do_exec(argc-1, argv+1); + if (matches(*argv, "help") == 0) { + usage(); + return 0; + } + + fprintf(stderr, "Object \"%s\" is unknown, try \"tc help\".\n", + *argv); + return -1; +} + +static int tc_batch_cmd(int argc, char *argv[], void *data) +{ + return do_cmd(argc, argv); +} + +static int batch(const char *name) +{ + int ret; + + batch_mode = 1; + tc_core_init(); + + if (rtnl_open(&rth, 0) < 0) { + fprintf(stderr, "Cannot open rtnetlink\n"); + return -1; + } + + ret = do_batch(name, force, tc_batch_cmd, NULL); + + rtnl_close(&rth); + return ret; +} + + +int main(int argc, char **argv) +{ + const char *libbpf_version; + char *batch_file = NULL; + int color = CONF_COLOR; + int ret; + + 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], "-pretty") == 0) { + ++pretty; + } else if (matches(argv[1], "-graph") == 0) { + show_graph = 1; + } else if (matches(argv[1], "-Version") == 0) { + printf("tc utility, iproute2-%s", version); + libbpf_version = get_libbpf_version(); + if (libbpf_version) + printf(", libbpf %s", libbpf_version); + printf("\n"); + return 0; + } else if (matches(argv[1], "-iec") == 0) { + ++use_iec; + } else if (matches(argv[1], "-help") == 0) { + usage(); + return 0; + } else if (matches(argv[1], "-force") == 0) { + ++force; + } else if (matches(argv[1], "-batch") == 0) { + argc--; argv++; + if (argc <= 1) + usage(); + batch_file = argv[1]; + } else if (matches(argv[1], "-netns") == 0) { + NEXT_ARG(); + if (netns_switch(argv[1])) + return -1; + } else if (matches(argv[1], "-Numeric") == 0) { + ++numeric; + } else if (matches(argv[1], "-names") == 0 || + matches(argv[1], "-nm") == 0) { + use_names = true; + } else if (matches(argv[1], "-cf") == 0 || + matches(argv[1], "-conf") == 0) { + NEXT_ARG(); + conf_file = argv[1]; + } else if (matches_color(argv[1], &color)) { + } else if (matches(argv[1], "-timestamp") == 0) { + timestamp++; + } else if (matches(argv[1], "-tshort") == 0) { + ++timestamp; + ++timestamp_short; + } else if (matches(argv[1], "-json") == 0) { + ++json; + } else if (matches(argv[1], "-oneline") == 0) { + ++oneline; + } else if (matches(argv[1], "-brief") == 0) { + ++brief; + } else { + fprintf(stderr, + "Option \"%s\" is unknown, try \"tc -help\".\n", + argv[1]); + return -1; + } + argc--; argv++; + } + + _SL_ = oneline ? "\\" : "\n"; + + check_enable_color(color, json); + + if (batch_file) + return batch(batch_file); + + if (argc <= 1) { + usage(); + return 0; + } + + tc_core_init(); + if (rtnl_open(&rth, 0) < 0) { + fprintf(stderr, "Cannot open rtnetlink\n"); + exit(1); + } + + if (use_names && cls_names_init(conf_file)) { + ret = -1; + goto Exit; + } + + ret = do_cmd(argc-1, argv+1); +Exit: + rtnl_close(&rth); + + if (use_names) + cls_names_uninit(); + + return ret; +} |