diff options
Diffstat (limited to 'tc/p_ip.c')
| -rw-r--r-- | tc/p_ip.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/tc/p_ip.c b/tc/p_ip.c new file mode 100644 index 0000000..8eed9e8 --- /dev/null +++ b/tc/p_ip.c @@ -0,0 +1,161 @@ +/* + * p_ip.c packet editor: IPV4 header + * + * This program is free software; you can distribute 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: J Hadi Salim (hadi@cyberus.ca) + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <string.h> +#include "utils.h" +#include "tc_util.h" +#include "m_pedit.h" + +static int +parse_ip(int *argc_p, char ***argv_p, + struct m_pedit_sel *sel, struct m_pedit_key *tkey) +{ + int res = -1; + int argc = *argc_p; + char **argv = *argv_p; + + if (argc < 2) + return -1; + + tkey->htype = sel->extended ? + TCA_PEDIT_KEY_EX_HDR_TYPE_IP4 : + TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK; + + if (strcmp(*argv, "src") == 0) { + NEXT_ARG(); + tkey->off = 12; + res = parse_cmd(&argc, &argv, 4, TIPV4, RU32, sel, tkey, 0); + goto done; + } + if (strcmp(*argv, "dst") == 0) { + NEXT_ARG(); + tkey->off = 16; + res = parse_cmd(&argc, &argv, 4, TIPV4, RU32, sel, tkey, 0); + goto done; + } + /* jamal - look at these and make them either old or new + ** scheme given diffserv + ** don't forget the CE bit + */ + if (strcmp(*argv, "tos") == 0 || matches(*argv, "dsfield") == 0) { + NEXT_ARG(); + tkey->off = 1; + res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0); + goto done; + } + if (strcmp(*argv, "ihl") == 0) { + NEXT_ARG(); + tkey->off = 0; + res = parse_cmd(&argc, &argv, 1, TU32, 0x0f, sel, tkey, 0); + goto done; + } + if (strcmp(*argv, "ttl") == 0) { + NEXT_ARG(); + tkey->off = 8; + res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, PEDIT_ALLOW_DEC); + goto done; + } + if (strcmp(*argv, "protocol") == 0) { + NEXT_ARG(); + tkey->off = 9; + res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0); + goto done; + } + /* jamal - fix this */ + if (matches(*argv, "precedence") == 0) { + NEXT_ARG(); + tkey->off = 1; + res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0); + goto done; + } + /* jamal - validate this at some point */ + if (strcmp(*argv, "nofrag") == 0) { + NEXT_ARG(); + tkey->off = 6; + res = parse_cmd(&argc, &argv, 1, TU32, 0x3F, sel, tkey, 0); + goto done; + } + /* jamal - validate this at some point */ + if (strcmp(*argv, "firstfrag") == 0) { + NEXT_ARG(); + tkey->off = 6; + res = parse_cmd(&argc, &argv, 1, TU32, 0x1F, sel, tkey, 0); + goto done; + } + if (strcmp(*argv, "ce") == 0) { + NEXT_ARG(); + tkey->off = 6; + res = parse_cmd(&argc, &argv, 1, TU32, 0x80, sel, tkey, 0); + goto done; + } + if (strcmp(*argv, "df") == 0) { + NEXT_ARG(); + tkey->off = 6; + res = parse_cmd(&argc, &argv, 1, TU32, 0x40, sel, tkey, 0); + goto done; + } + if (strcmp(*argv, "mf") == 0) { + NEXT_ARG(); + tkey->off = 6; + res = parse_cmd(&argc, &argv, 1, TU32, 0x20, sel, tkey, 0); + goto done; + } + + if (sel->extended) + return -1; /* fields located outside IP header should be + * addressed using the relevant header type in + * extended pedit kABI + */ + + if (strcmp(*argv, "dport") == 0) { + NEXT_ARG(); + tkey->off = 22; + res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey, 0); + goto done; + } + if (strcmp(*argv, "sport") == 0) { + NEXT_ARG(); + tkey->off = 20; + res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey, 0); + goto done; + } + if (strcmp(*argv, "icmp_type") == 0) { + NEXT_ARG(); + tkey->off = 20; + res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0); + goto done; + } + if (strcmp(*argv, "icmp_code") == 0) { + NEXT_ARG(); + tkey->off = 20; + res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey, 0); + goto done; + } + return -1; + +done: + *argc_p = argc; + *argv_p = argv; + return res; +} + +struct m_pedit_util p_pedit_ip = { + .id = "ip", + .parse_peopt = parse_ip, +}; |