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7fc02572 RW |
1 | /* |
2 | * Copyright (C) 2016 by Open Source Routing. | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
7fc02572 RW |
19 | */ |
20 | ||
d3e2c74a | 21 | #include <zebra.h> |
ddfeb486 DL |
22 | |
23 | #ifdef OPEN_BSD | |
24 | ||
d3e2c74a RW |
25 | #include <netmpls/mpls.h> |
26 | #include "zebra/rt.h" | |
27 | #include "zebra/zebra_mpls.h" | |
28 | #include "zebra/debug.h" | |
364fed6b | 29 | #include "zebra/zebra_errors.h" |
d3e2c74a RW |
30 | |
31 | #include "privs.h" | |
32 | #include "prefix.h" | |
33 | #include "interface.h" | |
34 | #include "log.h" | |
174482ef | 35 | #include "lib_errors.h" |
d3e2c74a RW |
36 | |
37 | extern struct zebra_privs_t zserv_privs; | |
38 | ||
39 | struct { | |
d7c0a89a | 40 | uint32_t rtseq; |
d62a17ae | 41 | int fd; |
d42127da | 42 | int ioctl_fd; |
d3e2c74a RW |
43 | } kr_state; |
44 | ||
d62a17ae | 45 | static int kernel_send_rtmsg_v4(int action, mpls_label_t in_label, |
81793ac1 | 46 | const zebra_nhlfe_t *nhlfe) |
d3e2c74a | 47 | { |
d62a17ae | 48 | struct iovec iov[5]; |
49 | struct rt_msghdr hdr; | |
50 | struct sockaddr_mpls sa_label_in, sa_label_out; | |
51 | struct sockaddr_in nexthop; | |
52 | int iovcnt = 0; | |
53 | int ret; | |
54 | ||
55 | if (IS_ZEBRA_DEBUG_KERNEL) | |
56 | zlog_debug("%s: 0x%x, label=%u", __func__, action, in_label); | |
57 | ||
58 | /* initialize header */ | |
59 | memset(&hdr, 0, sizeof(hdr)); | |
60 | hdr.rtm_version = RTM_VERSION; | |
61 | ||
62 | hdr.rtm_type = action; | |
63 | hdr.rtm_flags = RTF_UP; | |
64 | hdr.rtm_fmask = RTF_MPLS; | |
65 | hdr.rtm_seq = kr_state.rtseq++; /* overflow doesn't matter */ | |
66 | hdr.rtm_msglen = sizeof(hdr); | |
67 | hdr.rtm_hdrlen = sizeof(struct rt_msghdr); | |
68 | hdr.rtm_priority = 0; | |
69 | /* adjust iovec */ | |
70 | iov[iovcnt].iov_base = &hdr; | |
71 | iov[iovcnt++].iov_len = sizeof(hdr); | |
72 | ||
73 | /* in label */ | |
74 | memset(&sa_label_in, 0, sizeof(sa_label_in)); | |
75 | sa_label_in.smpls_len = sizeof(sa_label_in); | |
76 | sa_label_in.smpls_family = AF_MPLS; | |
77 | sa_label_in.smpls_label = htonl(in_label << MPLS_LABEL_OFFSET); | |
78 | /* adjust header */ | |
79 | hdr.rtm_flags |= RTF_MPLS | RTF_MPATH; | |
80 | hdr.rtm_addrs |= RTA_DST; | |
81 | hdr.rtm_msglen += sizeof(sa_label_in); | |
82 | /* adjust iovec */ | |
83 | iov[iovcnt].iov_base = &sa_label_in; | |
84 | iov[iovcnt++].iov_len = sizeof(sa_label_in); | |
85 | ||
86 | /* nexthop */ | |
87 | memset(&nexthop, 0, sizeof(nexthop)); | |
88 | nexthop.sin_len = sizeof(nexthop); | |
89 | nexthop.sin_family = AF_INET; | |
90 | nexthop.sin_addr = nhlfe->nexthop->gate.ipv4; | |
91 | /* adjust header */ | |
92 | hdr.rtm_flags |= RTF_GATEWAY; | |
93 | hdr.rtm_addrs |= RTA_GATEWAY; | |
94 | hdr.rtm_msglen += sizeof(nexthop); | |
95 | /* adjust iovec */ | |
96 | iov[iovcnt].iov_base = &nexthop; | |
97 | iov[iovcnt++].iov_len = sizeof(nexthop); | |
98 | ||
99 | /* If action is RTM_DELETE we have to get rid of MPLS infos */ | |
100 | if (action != RTM_DELETE) { | |
101 | memset(&sa_label_out, 0, sizeof(sa_label_out)); | |
102 | sa_label_out.smpls_len = sizeof(sa_label_out); | |
103 | sa_label_out.smpls_family = AF_MPLS; | |
104 | sa_label_out.smpls_label = | |
105 | htonl(nhlfe->nexthop->nh_label->label[0] | |
106 | << MPLS_LABEL_OFFSET); | |
107 | /* adjust header */ | |
108 | hdr.rtm_addrs |= RTA_SRC; | |
109 | hdr.rtm_flags |= RTF_MPLS; | |
110 | hdr.rtm_msglen += sizeof(sa_label_out); | |
111 | /* adjust iovec */ | |
112 | iov[iovcnt].iov_base = &sa_label_out; | |
113 | iov[iovcnt++].iov_len = sizeof(sa_label_out); | |
114 | ||
115 | if (nhlfe->nexthop->nh_label->label[0] == MPLS_LABEL_IMPLNULL) | |
116 | hdr.rtm_mpls = MPLS_OP_POP; | |
117 | else | |
118 | hdr.rtm_mpls = MPLS_OP_SWAP; | |
119 | } | |
120 | ||
01b9e3fd DL |
121 | frr_elevate_privs(&zserv_privs) { |
122 | ret = writev(kr_state.fd, iov, iovcnt); | |
123 | } | |
d62a17ae | 124 | |
125 | if (ret == -1) | |
450971aa | 126 | flog_err_sys(EC_LIB_SOCKET, "%s: %s", __func__, |
09c866e3 | 127 | safe_strerror(errno)); |
d62a17ae | 128 | |
129 | return ret; | |
e07486ce RW |
130 | } |
131 | ||
132 | #if !defined(ROUNDUP) | |
d62a17ae | 133 | #define ROUNDUP(a) \ |
134 | (((a) & (sizeof(long) - 1)) ? (1 + ((a) | (sizeof(long) - 1))) : (a)) | |
e07486ce RW |
135 | #endif |
136 | ||
d62a17ae | 137 | static int kernel_send_rtmsg_v6(int action, mpls_label_t in_label, |
81793ac1 | 138 | const zebra_nhlfe_t *nhlfe) |
e07486ce | 139 | { |
d62a17ae | 140 | struct iovec iov[5]; |
141 | struct rt_msghdr hdr; | |
142 | struct sockaddr_mpls sa_label_in, sa_label_out; | |
143 | struct pad { | |
144 | struct sockaddr_in6 addr; | |
145 | char pad[sizeof(long)]; /* thank you IPv6 */ | |
146 | } nexthop; | |
147 | int iovcnt = 0; | |
148 | int ret; | |
149 | ||
150 | if (IS_ZEBRA_DEBUG_KERNEL) | |
151 | zlog_debug("%s: 0x%x, label=%u", __func__, action, in_label); | |
152 | ||
153 | /* initialize header */ | |
154 | memset(&hdr, 0, sizeof(hdr)); | |
155 | hdr.rtm_version = RTM_VERSION; | |
156 | ||
157 | hdr.rtm_type = action; | |
158 | hdr.rtm_flags = RTF_UP; | |
159 | hdr.rtm_fmask = RTF_MPLS; | |
160 | hdr.rtm_seq = kr_state.rtseq++; /* overflow doesn't matter */ | |
161 | hdr.rtm_msglen = sizeof(hdr); | |
162 | hdr.rtm_hdrlen = sizeof(struct rt_msghdr); | |
163 | hdr.rtm_priority = 0; | |
164 | /* adjust iovec */ | |
165 | iov[iovcnt].iov_base = &hdr; | |
166 | iov[iovcnt++].iov_len = sizeof(hdr); | |
167 | ||
168 | /* in label */ | |
169 | memset(&sa_label_in, 0, sizeof(sa_label_in)); | |
170 | sa_label_in.smpls_len = sizeof(sa_label_in); | |
171 | sa_label_in.smpls_family = AF_MPLS; | |
172 | sa_label_in.smpls_label = htonl(in_label << MPLS_LABEL_OFFSET); | |
173 | /* adjust header */ | |
174 | hdr.rtm_flags |= RTF_MPLS | RTF_MPATH; | |
175 | hdr.rtm_addrs |= RTA_DST; | |
176 | hdr.rtm_msglen += sizeof(sa_label_in); | |
177 | /* adjust iovec */ | |
178 | iov[iovcnt].iov_base = &sa_label_in; | |
179 | iov[iovcnt++].iov_len = sizeof(sa_label_in); | |
180 | ||
181 | /* nexthop */ | |
182 | memset(&nexthop, 0, sizeof(nexthop)); | |
183 | nexthop.addr.sin6_len = sizeof(struct sockaddr_in6); | |
184 | nexthop.addr.sin6_family = AF_INET6; | |
185 | nexthop.addr.sin6_addr = nhlfe->nexthop->gate.ipv6; | |
186 | if (IN6_IS_ADDR_LINKLOCAL(&nexthop.addr.sin6_addr)) { | |
187 | uint16_t tmp16; | |
188 | struct sockaddr_in6 *sin6 = &nexthop.addr; | |
189 | ||
190 | nexthop.addr.sin6_scope_id = nhlfe->nexthop->ifindex; | |
191 | ||
192 | memcpy(&tmp16, &sin6->sin6_addr.s6_addr[2], sizeof(tmp16)); | |
193 | tmp16 = htons(sin6->sin6_scope_id); | |
194 | memcpy(&sin6->sin6_addr.s6_addr[2], &tmp16, sizeof(tmp16)); | |
195 | sin6->sin6_scope_id = 0; | |
196 | } | |
197 | ||
198 | /* adjust header */ | |
199 | hdr.rtm_flags |= RTF_GATEWAY; | |
200 | hdr.rtm_addrs |= RTA_GATEWAY; | |
201 | hdr.rtm_msglen += ROUNDUP(sizeof(struct sockaddr_in6)); | |
202 | /* adjust iovec */ | |
203 | iov[iovcnt].iov_base = &nexthop; | |
204 | iov[iovcnt++].iov_len = ROUNDUP(sizeof(struct sockaddr_in6)); | |
205 | ||
206 | /* If action is RTM_DELETE we have to get rid of MPLS infos */ | |
207 | if (action != RTM_DELETE) { | |
208 | memset(&sa_label_out, 0, sizeof(sa_label_out)); | |
209 | sa_label_out.smpls_len = sizeof(sa_label_out); | |
210 | sa_label_out.smpls_family = AF_MPLS; | |
211 | sa_label_out.smpls_label = | |
212 | htonl(nhlfe->nexthop->nh_label->label[0] | |
213 | << MPLS_LABEL_OFFSET); | |
214 | /* adjust header */ | |
215 | hdr.rtm_addrs |= RTA_SRC; | |
216 | hdr.rtm_flags |= RTF_MPLS; | |
217 | hdr.rtm_msglen += sizeof(sa_label_out); | |
218 | /* adjust iovec */ | |
219 | iov[iovcnt].iov_base = &sa_label_out; | |
220 | iov[iovcnt++].iov_len = sizeof(sa_label_out); | |
221 | ||
222 | if (nhlfe->nexthop->nh_label->label[0] == MPLS_LABEL_IMPLNULL) | |
223 | hdr.rtm_mpls = MPLS_OP_POP; | |
224 | else | |
225 | hdr.rtm_mpls = MPLS_OP_SWAP; | |
226 | } | |
227 | ||
01b9e3fd DL |
228 | frr_elevate_privs(&zserv_privs) { |
229 | ret = writev(kr_state.fd, iov, iovcnt); | |
230 | } | |
d62a17ae | 231 | |
232 | if (ret == -1) | |
450971aa | 233 | flog_err_sys(EC_LIB_SOCKET, "%s: %s", __func__, |
09c866e3 | 234 | safe_strerror(errno)); |
d62a17ae | 235 | |
236 | return ret; | |
d3e2c74a RW |
237 | } |
238 | ||
fc608372 | 239 | static int kernel_lsp_cmd(struct zebra_dplane_ctx *ctx) |
d3e2c74a | 240 | { |
81793ac1 | 241 | const zebra_nhlfe_t *nhlfe; |
d62a17ae | 242 | struct nexthop *nexthop = NULL; |
243 | unsigned int nexthop_num = 0; | |
fc608372 MS |
244 | int action; |
245 | ||
246 | switch (dplane_ctx_get_op(ctx)) { | |
247 | case DPLANE_OP_LSP_DELETE: | |
248 | action = RTM_DELETE; | |
249 | break; | |
250 | case DPLANE_OP_LSP_INSTALL: | |
251 | action = RTM_ADD; | |
252 | break; | |
253 | case DPLANE_OP_LSP_UPDATE: | |
254 | action = RTM_CHANGE; | |
255 | break; | |
256 | default: | |
257 | return -1; | |
258 | } | |
d62a17ae | 259 | |
fc608372 | 260 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); nhlfe; nhlfe = nhlfe->next) { |
d62a17ae | 261 | nexthop = nhlfe->nexthop; |
262 | if (!nexthop) | |
263 | continue; | |
264 | ||
265 | if (nexthop_num >= multipath_num) | |
266 | break; | |
267 | ||
268 | if (((action == RTM_ADD || action == RTM_CHANGE) | |
269 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
270 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))) | |
271 | || (action == RTM_DELETE | |
272 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
273 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)))) { | |
5e8c8947 | 274 | if (nhlfe->nexthop->nh_label->num_labels > 1) { |
e914ccbe | 275 | flog_warn(EC_ZEBRA_MAX_LABELS_PUSH, |
9df414fe QY |
276 | "%s: can't push %u labels at once " |
277 | "(maximum is 1)", | |
278 | __func__, | |
279 | nhlfe->nexthop->nh_label->num_labels); | |
5e8c8947 RW |
280 | continue; |
281 | } | |
282 | ||
d62a17ae | 283 | nexthop_num++; |
284 | ||
285 | switch (NHLFE_FAMILY(nhlfe)) { | |
286 | case AF_INET: | |
fc608372 MS |
287 | kernel_send_rtmsg_v4( |
288 | action, | |
289 | dplane_ctx_get_in_label(ctx), | |
290 | nhlfe); | |
d62a17ae | 291 | break; |
292 | case AF_INET6: | |
fc608372 MS |
293 | kernel_send_rtmsg_v6( |
294 | action, | |
295 | dplane_ctx_get_in_label(ctx), | |
296 | nhlfe); | |
d62a17ae | 297 | break; |
298 | default: | |
299 | break; | |
300 | } | |
d62a17ae | 301 | } |
302 | } | |
303 | ||
304 | return (0); | |
d3e2c74a RW |
305 | } |
306 | ||
fc608372 | 307 | enum zebra_dplane_result kernel_lsp_update(struct zebra_dplane_ctx *ctx) |
d3e2c74a | 308 | { |
d62a17ae | 309 | int ret; |
c4c8dec0 | 310 | |
fc608372 | 311 | ret = kernel_lsp_cmd(ctx); |
c4c8dec0 | 312 | |
fc608372 MS |
313 | return (ret == 0 ? |
314 | ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE); | |
16c628de MS |
315 | } |
316 | ||
97d8d05a | 317 | static enum zebra_dplane_result kmpw_install(struct zebra_dplane_ctx *ctx) |
d42127da RW |
318 | { |
319 | struct ifreq ifr; | |
320 | struct ifmpwreq imr; | |
321 | struct sockaddr_storage ss; | |
322 | struct sockaddr_in *sa_in = (struct sockaddr_in *)&ss; | |
323 | struct sockaddr_in6 *sa_in6 = (struct sockaddr_in6 *)&ss; | |
97d8d05a | 324 | const union g_addr *gaddr; |
d42127da RW |
325 | |
326 | memset(&imr, 0, sizeof(imr)); | |
97d8d05a | 327 | switch (dplane_ctx_get_pw_type(ctx)) { |
d42127da RW |
328 | case PW_TYPE_ETHERNET: |
329 | imr.imr_type = IMR_TYPE_ETHERNET; | |
330 | break; | |
331 | case PW_TYPE_ETHERNET_TAGGED: | |
332 | imr.imr_type = IMR_TYPE_ETHERNET_TAGGED; | |
333 | break; | |
334 | default: | |
9df414fe | 335 | zlog_debug("%s: unhandled pseudowire type (%#X)", __func__, |
97d8d05a MS |
336 | dplane_ctx_get_pw_type(ctx)); |
337 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
d42127da RW |
338 | } |
339 | ||
97d8d05a | 340 | if (dplane_ctx_get_pw_flags(ctx) & F_PSEUDOWIRE_CWORD) |
d42127da RW |
341 | imr.imr_flags |= IMR_FLAG_CONTROLWORD; |
342 | ||
343 | /* pseudowire nexthop */ | |
344 | memset(&ss, 0, sizeof(ss)); | |
16d69787 | 345 | gaddr = dplane_ctx_get_pw_dest(ctx); |
97d8d05a | 346 | switch (dplane_ctx_get_pw_af(ctx)) { |
d42127da RW |
347 | case AF_INET: |
348 | sa_in->sin_family = AF_INET; | |
349 | sa_in->sin_len = sizeof(struct sockaddr_in); | |
97d8d05a | 350 | sa_in->sin_addr = gaddr->ipv4; |
d42127da RW |
351 | break; |
352 | case AF_INET6: | |
353 | sa_in6->sin6_family = AF_INET6; | |
354 | sa_in6->sin6_len = sizeof(struct sockaddr_in6); | |
97d8d05a | 355 | sa_in6->sin6_addr = gaddr->ipv6; |
d42127da RW |
356 | break; |
357 | default: | |
9df414fe | 358 | zlog_debug("%s: unhandled pseudowire address-family (%u)", |
97d8d05a MS |
359 | __func__, dplane_ctx_get_pw_af(ctx)); |
360 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
d42127da RW |
361 | } |
362 | memcpy(&imr.imr_nexthop, (struct sockaddr *)&ss, | |
363 | sizeof(imr.imr_nexthop)); | |
364 | ||
365 | /* pseudowire local/remote labels */ | |
97d8d05a MS |
366 | imr.imr_lshim.shim_label = dplane_ctx_get_pw_local_label(ctx); |
367 | imr.imr_rshim.shim_label = dplane_ctx_get_pw_remote_label(ctx); | |
d42127da RW |
368 | |
369 | /* ioctl */ | |
370 | memset(&ifr, 0, sizeof(ifr)); | |
97d8d05a MS |
371 | strlcpy(ifr.ifr_name, dplane_ctx_get_pw_ifname(ctx), |
372 | sizeof(ifr.ifr_name)); | |
d42127da RW |
373 | ifr.ifr_data = (caddr_t)&imr; |
374 | if (ioctl(kr_state.ioctl_fd, SIOCSETMPWCFG, &ifr) == -1) { | |
450971aa | 375 | flog_err_sys(EC_LIB_SYSTEM_CALL, "ioctl SIOCSETMPWCFG: %s", |
09c866e3 | 376 | safe_strerror(errno)); |
97d8d05a | 377 | return ZEBRA_DPLANE_REQUEST_FAILURE; |
d42127da RW |
378 | } |
379 | ||
97d8d05a | 380 | return ZEBRA_DPLANE_REQUEST_SUCCESS; |
d42127da RW |
381 | } |
382 | ||
97d8d05a | 383 | static enum zebra_dplane_result kmpw_uninstall(struct zebra_dplane_ctx *ctx) |
d42127da RW |
384 | { |
385 | struct ifreq ifr; | |
386 | struct ifmpwreq imr; | |
387 | ||
388 | memset(&ifr, 0, sizeof(ifr)); | |
389 | memset(&imr, 0, sizeof(imr)); | |
97d8d05a MS |
390 | strlcpy(ifr.ifr_name, dplane_ctx_get_pw_ifname(ctx), |
391 | sizeof(ifr.ifr_name)); | |
d42127da RW |
392 | ifr.ifr_data = (caddr_t)&imr; |
393 | if (ioctl(kr_state.ioctl_fd, SIOCSETMPWCFG, &ifr) == -1) { | |
450971aa | 394 | flog_err_sys(EC_LIB_SYSTEM_CALL, "ioctl SIOCSETMPWCFG: %s", |
09c866e3 | 395 | safe_strerror(errno)); |
97d8d05a | 396 | return ZEBRA_DPLANE_REQUEST_FAILURE; |
d42127da RW |
397 | } |
398 | ||
97d8d05a MS |
399 | return ZEBRA_DPLANE_REQUEST_SUCCESS; |
400 | } | |
401 | ||
402 | /* | |
403 | * Pseudowire update api for openbsd. | |
404 | */ | |
405 | enum zebra_dplane_result kernel_pw_update(struct zebra_dplane_ctx *ctx) | |
406 | { | |
407 | enum zebra_dplane_result result = ZEBRA_DPLANE_REQUEST_FAILURE; | |
408 | ||
409 | switch (dplane_ctx_get_op(ctx)) { | |
410 | case DPLANE_OP_PW_INSTALL: | |
411 | result = kmpw_install(ctx); | |
412 | break; | |
413 | case DPLANE_OP_PW_UNINSTALL: | |
414 | result = kmpw_uninstall(ctx); | |
415 | break; | |
416 | default: | |
417 | break; | |
5b94ec50 | 418 | } |
97d8d05a MS |
419 | |
420 | return result; | |
d42127da RW |
421 | } |
422 | ||
d3e2c74a | 423 | #define MAX_RTSOCK_BUF 128 * 1024 |
d62a17ae | 424 | int mpls_kernel_init(void) |
d3e2c74a | 425 | { |
d62a17ae | 426 | int rcvbuf, default_rcvbuf; |
427 | socklen_t optlen; | |
428 | ||
429 | if ((kr_state.fd = socket(AF_ROUTE, SOCK_RAW, 0)) == -1) { | |
450971aa | 430 | flog_err_sys(EC_LIB_SOCKET, "%s: socket", __func__); |
d62a17ae | 431 | return -1; |
432 | } | |
433 | ||
d42127da RW |
434 | if ((kr_state.ioctl_fd = socket(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK, 0)) |
435 | == -1) { | |
450971aa | 436 | flog_err_sys(EC_LIB_SOCKET, "%s: ioctl socket", __func__); |
d42127da RW |
437 | return -1; |
438 | } | |
439 | ||
d62a17ae | 440 | /* grow receive buffer, don't wanna miss messages */ |
441 | optlen = sizeof(default_rcvbuf); | |
442 | if (getsockopt(kr_state.fd, SOL_SOCKET, SO_RCVBUF, &default_rcvbuf, | |
443 | &optlen) | |
444 | == -1) | |
450971aa | 445 | flog_err_sys(EC_LIB_SOCKET, |
9df414fe | 446 | "kr_init getsockopt SOL_SOCKET SO_RCVBUF"); |
d62a17ae | 447 | else |
448 | for (rcvbuf = MAX_RTSOCK_BUF; | |
449 | rcvbuf > default_rcvbuf | |
450 | && setsockopt(kr_state.fd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, | |
451 | sizeof(rcvbuf)) | |
452 | == -1 | |
453 | && errno == ENOBUFS; | |
454 | rcvbuf /= 2) | |
455 | ; /* nothing */ | |
456 | ||
457 | kr_state.rtseq = 1; | |
458 | ||
459 | return 0; | |
d3e2c74a | 460 | } |
ddfeb486 DL |
461 | |
462 | #endif /* OPEN_BSD */ |