diff options
Diffstat (limited to 'tc/m_skbedit.c')
| -rw-r--r-- | tc/m_skbedit.c | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/tc/m_skbedit.c b/tc/m_skbedit.c new file mode 100644 index 0000000..d55a612 --- /dev/null +++ b/tc/m_skbedit.c @@ -0,0 +1,266 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * m_skbedit.c SKB Editing module + * + * Copyright (c) 2008, Intel Corporation. + * + * Authors: Alexander Duyck <alexander.h.duyck@intel.com> + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include "utils.h" +#include "tc_util.h" +#include <linux/tc_act/tc_skbedit.h> +#include <linux/if_packet.h> + +static void explain(void) +{ + fprintf(stderr, "Usage: ... skbedit <[QM] [PM] [MM] [PT] [IF]>\n" + "QM = queue_mapping QUEUE_MAPPING\n" + "PM = priority PRIORITY\n" + "MM = mark MARK[/MASK]\n" + "PT = ptype PACKETYPE\n" + "IF = inheritdsfield\n" + "PACKETYPE = is one of:\n" + " host, otherhost, broadcast, multicast\n" + "QUEUE_MAPPING = device transmit queue to use\n" + "PRIORITY = classID to assign to priority field\n" + "MARK = firewall mark to set\n" + "MASK = mask applied to firewall mark (0xffffffff by default)\n" + "note: inheritdsfield maps DS field to skb->priority\n"); +} + +static void +usage(void) +{ + explain(); + exit(-1); +} + +static int +parse_skbedit(struct action_util *a, int *argc_p, char ***argv_p, int tca_id, + struct nlmsghdr *n) +{ + int argc = *argc_p; + char **argv = *argv_p; + int ok = 0; + struct rtattr *tail; + unsigned int tmp; + __u16 queue_mapping, ptype; + __u32 flags = 0, priority, mark, mask; + __u64 pure_flags = 0; + struct tc_skbedit sel = { 0 }; + + if (matches(*argv, "skbedit") != 0) + return -1; + + NEXT_ARG(); + + while (argc > 0) { + if (matches(*argv, "queue_mapping") == 0) { + flags |= SKBEDIT_F_QUEUE_MAPPING; + NEXT_ARG(); + if (get_unsigned(&tmp, *argv, 10) || tmp > 65535) { + fprintf(stderr, "Illegal queue_mapping\n"); + return -1; + } + queue_mapping = tmp; + ok++; + } else if (matches(*argv, "priority") == 0) { + flags |= SKBEDIT_F_PRIORITY; + NEXT_ARG(); + if (get_tc_classid(&priority, *argv)) { + fprintf(stderr, "Illegal priority\n"); + return -1; + } + ok++; + } else if (matches(*argv, "mark") == 0) { + char *slash; + + NEXT_ARG(); + slash = strchr(*argv, '/'); + if (slash) + *slash = '\0'; + + flags |= SKBEDIT_F_MARK; + if (get_u32(&mark, *argv, 0)) { + fprintf(stderr, "Illegal mark\n"); + return -1; + } + + if (slash) { + if (get_u32(&mask, slash + 1, 0)) { + fprintf(stderr, "Illegal mask\n"); + return -1; + } + flags |= SKBEDIT_F_MASK; + } + ok++; + } else if (matches(*argv, "ptype") == 0) { + + NEXT_ARG(); + if (matches(*argv, "host") == 0) { + ptype = PACKET_HOST; + } else if (matches(*argv, "broadcast") == 0) { + ptype = PACKET_BROADCAST; + } else if (matches(*argv, "multicast") == 0) { + ptype = PACKET_MULTICAST; + } else if (matches(*argv, "otherhost") == 0) { + ptype = PACKET_OTHERHOST; + } else { + fprintf(stderr, "Illegal ptype (%s)\n", + *argv); + return -1; + } + flags |= SKBEDIT_F_PTYPE; + ok++; + } else if (matches(*argv, "inheritdsfield") == 0) { + pure_flags |= SKBEDIT_F_INHERITDSFIELD; + ok++; + } else if (matches(*argv, "help") == 0) { + usage(); + } else { + break; + } + argc--; + argv++; + } + + parse_action_control_dflt(&argc, &argv, &sel.action, + false, TC_ACT_PIPE); + + if (argc) { + if (matches(*argv, "index") == 0) { + NEXT_ARG(); + if (get_u32(&sel.index, *argv, 10)) { + fprintf(stderr, "skbedit: Illegal \"index\"\n"); + return -1; + } + argc--; + argv++; + ok++; + } + } + + if (!ok) { + explain(); + return -1; + } + + + tail = addattr_nest(n, MAX_MSG, tca_id); + addattr_l(n, MAX_MSG, TCA_SKBEDIT_PARMS, &sel, sizeof(sel)); + if (flags & SKBEDIT_F_QUEUE_MAPPING) + addattr_l(n, MAX_MSG, TCA_SKBEDIT_QUEUE_MAPPING, + &queue_mapping, sizeof(queue_mapping)); + if (flags & SKBEDIT_F_PRIORITY) + addattr_l(n, MAX_MSG, TCA_SKBEDIT_PRIORITY, + &priority, sizeof(priority)); + if (flags & SKBEDIT_F_MARK) + addattr_l(n, MAX_MSG, TCA_SKBEDIT_MARK, + &mark, sizeof(mark)); + if (flags & SKBEDIT_F_MASK) + addattr_l(n, MAX_MSG, TCA_SKBEDIT_MASK, + &mask, sizeof(mask)); + if (flags & SKBEDIT_F_PTYPE) + addattr_l(n, MAX_MSG, TCA_SKBEDIT_PTYPE, + &ptype, sizeof(ptype)); + if (pure_flags != 0) + addattr64(n, MAX_MSG, TCA_SKBEDIT_FLAGS, pure_flags); + addattr_nest_end(n, tail); + + *argc_p = argc; + *argv_p = argv; + return 0; +} + +static int print_skbedit(struct action_util *au, FILE *f, struct rtattr *arg) +{ + struct rtattr *tb[TCA_SKBEDIT_MAX + 1]; + + SPRINT_BUF(b1); + __u32 priority; + __u16 ptype; + struct tc_skbedit *p; + + print_string(PRINT_ANY, "kind", "%s ", "skbedit"); + if (arg == NULL) + return 0; + + parse_rtattr_nested(tb, TCA_SKBEDIT_MAX, arg); + + if (tb[TCA_SKBEDIT_PARMS] == NULL) { + fprintf(stderr, "Missing skbedit parameters\n"); + return -1; + } + p = RTA_DATA(tb[TCA_SKBEDIT_PARMS]); + + if (tb[TCA_SKBEDIT_QUEUE_MAPPING] != NULL) { + print_uint(PRINT_ANY, "queue_mapping", "queue_mapping %u", + rta_getattr_u16(tb[TCA_SKBEDIT_QUEUE_MAPPING])); + } + if (tb[TCA_SKBEDIT_PRIORITY] != NULL) { + priority = rta_getattr_u32(tb[TCA_SKBEDIT_PRIORITY]); + print_string(PRINT_ANY, "priority", " priority %s", + sprint_tc_classid(priority, b1)); + } + if (tb[TCA_SKBEDIT_MARK] != NULL) { + print_uint(PRINT_ANY, "mark", " mark %u", + rta_getattr_u32(tb[TCA_SKBEDIT_MARK])); + } + if (tb[TCA_SKBEDIT_MASK]) { + print_hex(PRINT_ANY, "mask", "/%#x", + rta_getattr_u32(tb[TCA_SKBEDIT_MASK])); + } + if (tb[TCA_SKBEDIT_PTYPE] != NULL) { + ptype = rta_getattr_u16(tb[TCA_SKBEDIT_PTYPE]); + if (ptype == PACKET_HOST) + print_string(PRINT_ANY, "ptype", " ptype %s", "host"); + else if (ptype == PACKET_BROADCAST) + print_string(PRINT_ANY, "ptype", " ptype %s", + "broadcast"); + else if (ptype == PACKET_MULTICAST) + print_string(PRINT_ANY, "ptype", " ptype %s", + "multicast"); + else if (ptype == PACKET_OTHERHOST) + print_string(PRINT_ANY, "ptype", " ptype %s", + "otherhost"); + else + print_uint(PRINT_ANY, "ptype", " ptype %u", ptype); + } + if (tb[TCA_SKBEDIT_FLAGS] != NULL) { + __u64 flags = rta_getattr_u64(tb[TCA_SKBEDIT_FLAGS]); + + if (flags & SKBEDIT_F_INHERITDSFIELD) + print_null(PRINT_ANY, "inheritdsfield", " %s", + "inheritdsfield"); + } + + print_action_control(f, " ", p->action, ""); + + print_nl(); + print_uint(PRINT_ANY, "index", "\t index %u", p->index); + print_int(PRINT_ANY, "ref", " ref %d", p->refcnt); + print_int(PRINT_ANY, "bind", " bind %d", p->bindcnt); + + if (show_stats) { + if (tb[TCA_SKBEDIT_TM]) { + struct tcf_t *tm = RTA_DATA(tb[TCA_SKBEDIT_TM]); + + print_tm(f, tm); + } + } + + print_nl(); + + return 0; +} + +struct action_util skbedit_action_util = { + .id = "skbedit", + .parse_aopt = parse_skbedit, + .print_aopt = print_skbedit, +}; |