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Diffstat (limited to '')
| -rw-r--r-- | ip/iplink_geneve.c | 395 |
1 files changed, 395 insertions, 0 deletions
diff --git a/ip/iplink_geneve.c b/ip/iplink_geneve.c new file mode 100644 index 0000000..98099cc --- /dev/null +++ b/ip/iplink_geneve.c @@ -0,0 +1,395 @@ +/* + * iplink_geneve.c GENEVE device support + * + * 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: John W. Linville <linville@tuxdriver.com> + */ + +#include <stdio.h> + +#include "rt_names.h" +#include "utils.h" +#include "ip_common.h" + +#define GENEVE_ATTRSET(attrs, type) (((attrs) & (1L << (type))) != 0) + +static void print_explain(FILE *f) +{ + fprintf(f, + "Usage: ... geneve id VNI\n" + " remote ADDR\n" + " [ ttl TTL ]\n" + " [ tos TOS ]\n" + " [ df DF ]\n" + " [ flowlabel LABEL ]\n" + " [ dstport PORT ]\n" + " [ [no]external ]\n" + " [ [no]udpcsum ]\n" + " [ [no]udp6zerocsumtx ]\n" + " [ [no]udp6zerocsumrx ]\n" + " [ innerprotoinherit ]\n" + "\n" + "Where: VNI := 0-16777215\n" + " ADDR := IP_ADDRESS\n" + " TOS := { NUMBER | inherit }\n" + " TTL := { 1..255 | auto | inherit }\n" + " DF := { unset | set | inherit }\n" + " LABEL := 0-1048575\n" + ); +} + +static void explain(void) +{ + print_explain(stderr); +} + +static void check_duparg(__u64 *attrs, int type, const char *key, + const char *argv) +{ + if (!GENEVE_ATTRSET(*attrs, type)) { + *attrs |= (1L << type); + return; + } + duparg2(key, argv); +} + +static int geneve_parse_opt(struct link_util *lu, int argc, char **argv, + struct nlmsghdr *n) +{ + inet_prefix daddr; + __u32 vni = 0; + __u32 label = 0; + __u8 ttl = 0; + __u8 tos = 0; + __u16 dstport = 0; + bool metadata = 0; + __u8 udpcsum = 0; + __u8 udp6zerocsumtx = 0; + __u8 udp6zerocsumrx = 0; + __u64 attrs = 0; + bool set_op = (n->nlmsg_type == RTM_NEWLINK && + !(n->nlmsg_flags & NLM_F_CREATE)); + bool inner_proto_inherit = false; + + inet_prefix_reset(&daddr); + + while (argc > 0) { + if (!matches(*argv, "id") || + !matches(*argv, "vni")) { + NEXT_ARG(); + check_duparg(&attrs, IFLA_GENEVE_ID, "id", *argv); + if (get_u32(&vni, *argv, 0) || + vni >= 1u << 24) + invarg("invalid id", *argv); + } else if (!matches(*argv, "remote")) { + NEXT_ARG(); + check_duparg(&attrs, IFLA_GENEVE_REMOTE, "remote", + *argv); + get_addr(&daddr, *argv, AF_UNSPEC); + if (!is_addrtype_inet_not_multi(&daddr)) + invarg("invalid remote address", *argv); + } else if (!matches(*argv, "ttl") || + !matches(*argv, "hoplimit")) { + unsigned int uval; + + NEXT_ARG(); + check_duparg(&attrs, IFLA_GENEVE_TTL, "ttl", *argv); + if (strcmp(*argv, "inherit") == 0) { + addattr8(n, 1024, IFLA_GENEVE_TTL_INHERIT, 1); + } else if (strcmp(*argv, "auto") != 0) { + if (get_unsigned(&uval, *argv, 0)) + invarg("invalid TTL", *argv); + if (uval > 255) + invarg("TTL must be <= 255", *argv); + ttl = uval; + } + } else if (!matches(*argv, "tos") || + !matches(*argv, "dsfield")) { + __u32 uval; + + NEXT_ARG(); + check_duparg(&attrs, IFLA_GENEVE_TOS, "tos", *argv); + if (strcmp(*argv, "inherit") != 0) { + if (rtnl_dsfield_a2n(&uval, *argv)) + invarg("bad TOS value", *argv); + tos = uval; + } else + tos = 1; + } else if (!matches(*argv, "df")) { + enum ifla_geneve_df df; + + NEXT_ARG(); + check_duparg(&attrs, IFLA_GENEVE_DF, "df", *argv); + if (strcmp(*argv, "unset") == 0) + df = GENEVE_DF_UNSET; + else if (strcmp(*argv, "set") == 0) + df = GENEVE_DF_SET; + else if (strcmp(*argv, "inherit") == 0) + df = GENEVE_DF_INHERIT; + else + invarg("DF must be 'unset', 'set' or 'inherit'", + *argv); + + addattr8(n, 1024, IFLA_GENEVE_DF, df); + } else if (!matches(*argv, "label") || + !matches(*argv, "flowlabel")) { + __u32 uval; + + NEXT_ARG(); + check_duparg(&attrs, IFLA_GENEVE_LABEL, "flowlabel", + *argv); + if (get_u32(&uval, *argv, 0) || + (uval & ~LABEL_MAX_MASK)) + invarg("invalid flowlabel", *argv); + label = htonl(uval); + } else if (!matches(*argv, "dstport")) { + NEXT_ARG(); + check_duparg(&attrs, IFLA_GENEVE_PORT, "dstport", + *argv); + if (get_u16(&dstport, *argv, 0)) + invarg("dstport", *argv); + } else if (!matches(*argv, "external")) { + check_duparg(&attrs, IFLA_GENEVE_COLLECT_METADATA, + *argv, *argv); + metadata = true; + } else if (!matches(*argv, "noexternal")) { + check_duparg(&attrs, IFLA_GENEVE_COLLECT_METADATA, + *argv, *argv); + metadata = false; + } else if (!matches(*argv, "udpcsum")) { + check_duparg(&attrs, IFLA_GENEVE_UDP_CSUM, *argv, + *argv); + udpcsum = 1; + } else if (!matches(*argv, "noudpcsum")) { + check_duparg(&attrs, IFLA_GENEVE_UDP_CSUM, *argv, + *argv); + udpcsum = 0; + } else if (!matches(*argv, "udp6zerocsumtx")) { + check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, + *argv, *argv); + udp6zerocsumtx = 1; + } else if (!matches(*argv, "noudp6zerocsumtx")) { + check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, + *argv, *argv); + udp6zerocsumtx = 0; + } else if (!matches(*argv, "udp6zerocsumrx")) { + check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, + *argv, *argv); + udp6zerocsumrx = 1; + } else if (!matches(*argv, "noudp6zerocsumrx")) { + check_duparg(&attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, + *argv, *argv); + udp6zerocsumrx = 0; + } else if (!strcmp(*argv, "innerprotoinherit")) { + check_duparg(&attrs, IFLA_GENEVE_INNER_PROTO_INHERIT, + *argv, *argv); + inner_proto_inherit = true; + } else if (matches(*argv, "help") == 0) { + explain(); + return -1; + } else { + fprintf(stderr, "geneve: unknown command \"%s\"?\n", *argv); + explain(); + return -1; + } + argc--, argv++; + } + + if (metadata && GENEVE_ATTRSET(attrs, IFLA_GENEVE_ID)) { + fprintf(stderr, "geneve: both 'external' and vni cannot be specified\n"); + return -1; + } + + if (!metadata) { + /* parameter checking make sense only for full geneve tunnels */ + if (!GENEVE_ATTRSET(attrs, IFLA_GENEVE_ID)) { + fprintf(stderr, "geneve: missing virtual network identifier\n"); + return -1; + } + + /* If we are modifying the geneve device, then we only need the + * ID (VNI) to identify the geneve device, and we do not need + * the remote IP. + */ + if (!set_op && !is_addrtype_inet(&daddr)) { + fprintf(stderr, "geneve: remote link partner not specified\n"); + return -1; + } + } + + addattr32(n, 1024, IFLA_GENEVE_ID, vni); + if (is_addrtype_inet(&daddr)) { + int type = (daddr.family == AF_INET) ? IFLA_GENEVE_REMOTE : + IFLA_GENEVE_REMOTE6; + addattr_l(n, 1024, type, daddr.data, daddr.bytelen); + } + if (!set_op || GENEVE_ATTRSET(attrs, IFLA_GENEVE_LABEL)) + addattr32(n, 1024, IFLA_GENEVE_LABEL, label); + if (!set_op || GENEVE_ATTRSET(attrs, IFLA_GENEVE_TTL)) + addattr8(n, 1024, IFLA_GENEVE_TTL, ttl); + if (!set_op || GENEVE_ATTRSET(attrs, IFLA_GENEVE_TOS)) + addattr8(n, 1024, IFLA_GENEVE_TOS, tos); + if (dstport) + addattr16(n, 1024, IFLA_GENEVE_PORT, htons(dstport)); + if (metadata) + addattr(n, 1024, IFLA_GENEVE_COLLECT_METADATA); + if (inner_proto_inherit) + addattr(n, 1024, IFLA_GENEVE_INNER_PROTO_INHERIT); + if (GENEVE_ATTRSET(attrs, IFLA_GENEVE_UDP_CSUM)) + addattr8(n, 1024, IFLA_GENEVE_UDP_CSUM, udpcsum); + if (GENEVE_ATTRSET(attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_TX)) + addattr8(n, 1024, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, udp6zerocsumtx); + if (GENEVE_ATTRSET(attrs, IFLA_GENEVE_UDP_ZERO_CSUM6_RX)) + addattr8(n, 1024, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, udp6zerocsumrx); + + return 0; +} + +static void geneve_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) +{ + __u8 ttl = 0; + __u8 tos = 0; + + if (!tb) + return; + + if (tb[IFLA_GENEVE_COLLECT_METADATA]) { + print_bool(PRINT_ANY, "external", "external ", true); + } + + if (tb[IFLA_GENEVE_ID] && + RTA_PAYLOAD(tb[IFLA_GENEVE_ID]) >= sizeof(__u32)) { + print_uint(PRINT_ANY, "id", "id %u ", rta_getattr_u32(tb[IFLA_GENEVE_ID])); + } + + if (tb[IFLA_GENEVE_REMOTE]) { + __be32 addr = rta_getattr_u32(tb[IFLA_GENEVE_REMOTE]); + + if (addr) + print_string(PRINT_ANY, + "remote", + "remote %s ", + format_host(AF_INET, 4, &addr)); + } else if (tb[IFLA_GENEVE_REMOTE6]) { + struct in6_addr addr; + + memcpy(&addr, RTA_DATA(tb[IFLA_GENEVE_REMOTE6]), sizeof(struct in6_addr)); + if (!IN6_IS_ADDR_UNSPECIFIED(&addr)) { + if (!IN6_IS_ADDR_MULTICAST(&addr)) + print_string(PRINT_ANY, + "remote6", + "remote %s ", + format_host(AF_INET6, + sizeof(struct in6_addr), + &addr)); + } + } + + if (tb[IFLA_GENEVE_TTL_INHERIT] && + rta_getattr_u8(tb[IFLA_GENEVE_TTL_INHERIT])) { + print_string(PRINT_FP, NULL, "ttl %s ", "inherit"); + } else if (tb[IFLA_GENEVE_TTL]) { + ttl = rta_getattr_u8(tb[IFLA_GENEVE_TTL]); + if (is_json_context() || ttl) + print_uint(PRINT_ANY, "ttl", "ttl %u ", ttl); + else + print_string(PRINT_FP, NULL, "ttl %s ", "auto"); + } + + if (tb[IFLA_GENEVE_TOS]) + tos = rta_getattr_u8(tb[IFLA_GENEVE_TOS]); + if (tos) { + if (is_json_context() || tos != 1) + print_0xhex(PRINT_ANY, "tos", "tos %#llx ", tos); + else + print_string(PRINT_FP, NULL, "tos %s ", "inherit"); + } + + if (tb[IFLA_GENEVE_DF]) { + enum ifla_geneve_df df = rta_getattr_u8(tb[IFLA_GENEVE_DF]); + + if (df == GENEVE_DF_UNSET) + print_string(PRINT_JSON, "df", "df %s ", "unset"); + else if (df == GENEVE_DF_SET) + print_string(PRINT_ANY, "df", "df %s ", "set"); + else if (df == GENEVE_DF_INHERIT) + print_string(PRINT_ANY, "df", "df %s ", "inherit"); + } + + if (tb[IFLA_GENEVE_LABEL]) { + __u32 label = rta_getattr_u32(tb[IFLA_GENEVE_LABEL]); + + if (label) + print_0xhex(PRINT_ANY, + "label", "flowlabel %#llx ", + ntohl(label)); + } + + if (tb[IFLA_GENEVE_PORT]) + print_uint(PRINT_ANY, + "port", + "dstport %u ", + rta_getattr_be16(tb[IFLA_GENEVE_PORT])); + + if (tb[IFLA_GENEVE_UDP_CSUM]) { + if (is_json_context()) { + print_bool(PRINT_JSON, + "udp_csum", + NULL, + rta_getattr_u8(tb[IFLA_GENEVE_UDP_CSUM])); + } else { + if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_CSUM])) + fputs("no", f); + fputs("udpcsum ", f); + } + } + + if (tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]) { + if (is_json_context()) { + print_bool(PRINT_JSON, + "udp_zero_csum6_tx", + NULL, + rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])); + } else { + if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX])) + fputs("no", f); + fputs("udp6zerocsumtx ", f); + } + } + + if (tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]) { + if (is_json_context()) { + print_bool(PRINT_JSON, + "udp_zero_csum6_rx", + NULL, + rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])); + } else { + if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX])) + fputs("no", f); + fputs("udp6zerocsumrx ", f); + } + } + + if (tb[IFLA_GENEVE_INNER_PROTO_INHERIT]) { + print_bool(PRINT_ANY, "inner_proto_inherit", + "innerprotoinherit ", true); + } +} + +static void geneve_print_help(struct link_util *lu, int argc, char **argv, + FILE *f) +{ + print_explain(f); +} + +struct link_util geneve_link_util = { + .id = "geneve", + .maxattr = IFLA_GENEVE_MAX, + .parse_opt = geneve_parse_opt, + .print_opt = geneve_print_opt, + .print_help = geneve_print_help, +}; |