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Commit | Line | Data |
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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" |
b3f2b590 | 30 | #include "zebra/zebra_router.h" |
d3e2c74a RW |
31 | |
32 | #include "privs.h" | |
33 | #include "prefix.h" | |
34 | #include "interface.h" | |
35 | #include "log.h" | |
174482ef | 36 | #include "lib_errors.h" |
d3e2c74a RW |
37 | |
38 | extern struct zebra_privs_t zserv_privs; | |
39 | ||
40 | struct { | |
d7c0a89a | 41 | uint32_t rtseq; |
d62a17ae | 42 | int fd; |
d42127da | 43 | int ioctl_fd; |
d3e2c74a RW |
44 | } kr_state; |
45 | ||
d62a17ae | 46 | static int kernel_send_rtmsg_v4(int action, mpls_label_t in_label, |
81793ac1 | 47 | const zebra_nhlfe_t *nhlfe) |
d3e2c74a | 48 | { |
d62a17ae | 49 | struct iovec iov[5]; |
50 | struct rt_msghdr hdr; | |
51 | struct sockaddr_mpls sa_label_in, sa_label_out; | |
52 | struct sockaddr_in nexthop; | |
53 | int iovcnt = 0; | |
54 | int ret; | |
55 | ||
56 | if (IS_ZEBRA_DEBUG_KERNEL) | |
57 | zlog_debug("%s: 0x%x, label=%u", __func__, action, in_label); | |
58 | ||
59 | /* initialize header */ | |
60 | memset(&hdr, 0, sizeof(hdr)); | |
61 | hdr.rtm_version = RTM_VERSION; | |
62 | ||
63 | hdr.rtm_type = action; | |
64 | hdr.rtm_flags = RTF_UP; | |
65 | hdr.rtm_fmask = RTF_MPLS; | |
66 | hdr.rtm_seq = kr_state.rtseq++; /* overflow doesn't matter */ | |
67 | hdr.rtm_msglen = sizeof(hdr); | |
68 | hdr.rtm_hdrlen = sizeof(struct rt_msghdr); | |
69 | hdr.rtm_priority = 0; | |
70 | /* adjust iovec */ | |
71 | iov[iovcnt].iov_base = &hdr; | |
72 | iov[iovcnt++].iov_len = sizeof(hdr); | |
73 | ||
74 | /* in label */ | |
75 | memset(&sa_label_in, 0, sizeof(sa_label_in)); | |
76 | sa_label_in.smpls_len = sizeof(sa_label_in); | |
77 | sa_label_in.smpls_family = AF_MPLS; | |
78 | sa_label_in.smpls_label = htonl(in_label << MPLS_LABEL_OFFSET); | |
79 | /* adjust header */ | |
80 | hdr.rtm_flags |= RTF_MPLS | RTF_MPATH; | |
81 | hdr.rtm_addrs |= RTA_DST; | |
82 | hdr.rtm_msglen += sizeof(sa_label_in); | |
83 | /* adjust iovec */ | |
84 | iov[iovcnt].iov_base = &sa_label_in; | |
85 | iov[iovcnt++].iov_len = sizeof(sa_label_in); | |
86 | ||
87 | /* nexthop */ | |
88 | memset(&nexthop, 0, sizeof(nexthop)); | |
89 | nexthop.sin_len = sizeof(nexthop); | |
90 | nexthop.sin_family = AF_INET; | |
91 | nexthop.sin_addr = nhlfe->nexthop->gate.ipv4; | |
92 | /* adjust header */ | |
93 | hdr.rtm_flags |= RTF_GATEWAY; | |
94 | hdr.rtm_addrs |= RTA_GATEWAY; | |
95 | hdr.rtm_msglen += sizeof(nexthop); | |
96 | /* adjust iovec */ | |
97 | iov[iovcnt].iov_base = &nexthop; | |
98 | iov[iovcnt++].iov_len = sizeof(nexthop); | |
99 | ||
100 | /* If action is RTM_DELETE we have to get rid of MPLS infos */ | |
101 | if (action != RTM_DELETE) { | |
102 | memset(&sa_label_out, 0, sizeof(sa_label_out)); | |
103 | sa_label_out.smpls_len = sizeof(sa_label_out); | |
104 | sa_label_out.smpls_family = AF_MPLS; | |
105 | sa_label_out.smpls_label = | |
106 | htonl(nhlfe->nexthop->nh_label->label[0] | |
107 | << MPLS_LABEL_OFFSET); | |
108 | /* adjust header */ | |
109 | hdr.rtm_addrs |= RTA_SRC; | |
110 | hdr.rtm_flags |= RTF_MPLS; | |
111 | hdr.rtm_msglen += sizeof(sa_label_out); | |
112 | /* adjust iovec */ | |
113 | iov[iovcnt].iov_base = &sa_label_out; | |
114 | iov[iovcnt++].iov_len = sizeof(sa_label_out); | |
115 | ||
116 | if (nhlfe->nexthop->nh_label->label[0] == MPLS_LABEL_IMPLNULL) | |
117 | hdr.rtm_mpls = MPLS_OP_POP; | |
118 | else | |
119 | hdr.rtm_mpls = MPLS_OP_SWAP; | |
120 | } | |
121 | ||
0cf6db21 | 122 | frr_with_privs(&zserv_privs) { |
01b9e3fd DL |
123 | ret = writev(kr_state.fd, iov, iovcnt); |
124 | } | |
d62a17ae | 125 | |
126 | if (ret == -1) | |
450971aa | 127 | flog_err_sys(EC_LIB_SOCKET, "%s: %s", __func__, |
09c866e3 | 128 | safe_strerror(errno)); |
d62a17ae | 129 | |
130 | return ret; | |
e07486ce RW |
131 | } |
132 | ||
133 | #if !defined(ROUNDUP) | |
d62a17ae | 134 | #define ROUNDUP(a) \ |
135 | (((a) & (sizeof(long) - 1)) ? (1 + ((a) | (sizeof(long) - 1))) : (a)) | |
e07486ce RW |
136 | #endif |
137 | ||
d62a17ae | 138 | static int kernel_send_rtmsg_v6(int action, mpls_label_t in_label, |
81793ac1 | 139 | const zebra_nhlfe_t *nhlfe) |
e07486ce | 140 | { |
d62a17ae | 141 | struct iovec iov[5]; |
142 | struct rt_msghdr hdr; | |
143 | struct sockaddr_mpls sa_label_in, sa_label_out; | |
144 | struct pad { | |
145 | struct sockaddr_in6 addr; | |
146 | char pad[sizeof(long)]; /* thank you IPv6 */ | |
147 | } nexthop; | |
148 | int iovcnt = 0; | |
149 | int ret; | |
150 | ||
151 | if (IS_ZEBRA_DEBUG_KERNEL) | |
152 | zlog_debug("%s: 0x%x, label=%u", __func__, action, in_label); | |
153 | ||
154 | /* initialize header */ | |
155 | memset(&hdr, 0, sizeof(hdr)); | |
156 | hdr.rtm_version = RTM_VERSION; | |
157 | ||
158 | hdr.rtm_type = action; | |
159 | hdr.rtm_flags = RTF_UP; | |
160 | hdr.rtm_fmask = RTF_MPLS; | |
161 | hdr.rtm_seq = kr_state.rtseq++; /* overflow doesn't matter */ | |
162 | hdr.rtm_msglen = sizeof(hdr); | |
163 | hdr.rtm_hdrlen = sizeof(struct rt_msghdr); | |
164 | hdr.rtm_priority = 0; | |
165 | /* adjust iovec */ | |
166 | iov[iovcnt].iov_base = &hdr; | |
167 | iov[iovcnt++].iov_len = sizeof(hdr); | |
168 | ||
169 | /* in label */ | |
170 | memset(&sa_label_in, 0, sizeof(sa_label_in)); | |
171 | sa_label_in.smpls_len = sizeof(sa_label_in); | |
172 | sa_label_in.smpls_family = AF_MPLS; | |
173 | sa_label_in.smpls_label = htonl(in_label << MPLS_LABEL_OFFSET); | |
174 | /* adjust header */ | |
175 | hdr.rtm_flags |= RTF_MPLS | RTF_MPATH; | |
176 | hdr.rtm_addrs |= RTA_DST; | |
177 | hdr.rtm_msglen += sizeof(sa_label_in); | |
178 | /* adjust iovec */ | |
179 | iov[iovcnt].iov_base = &sa_label_in; | |
180 | iov[iovcnt++].iov_len = sizeof(sa_label_in); | |
181 | ||
182 | /* nexthop */ | |
183 | memset(&nexthop, 0, sizeof(nexthop)); | |
184 | nexthop.addr.sin6_len = sizeof(struct sockaddr_in6); | |
185 | nexthop.addr.sin6_family = AF_INET6; | |
186 | nexthop.addr.sin6_addr = nhlfe->nexthop->gate.ipv6; | |
187 | if (IN6_IS_ADDR_LINKLOCAL(&nexthop.addr.sin6_addr)) { | |
188 | uint16_t tmp16; | |
189 | struct sockaddr_in6 *sin6 = &nexthop.addr; | |
190 | ||
191 | nexthop.addr.sin6_scope_id = nhlfe->nexthop->ifindex; | |
192 | ||
193 | memcpy(&tmp16, &sin6->sin6_addr.s6_addr[2], sizeof(tmp16)); | |
194 | tmp16 = htons(sin6->sin6_scope_id); | |
195 | memcpy(&sin6->sin6_addr.s6_addr[2], &tmp16, sizeof(tmp16)); | |
196 | sin6->sin6_scope_id = 0; | |
197 | } | |
198 | ||
199 | /* adjust header */ | |
200 | hdr.rtm_flags |= RTF_GATEWAY; | |
201 | hdr.rtm_addrs |= RTA_GATEWAY; | |
202 | hdr.rtm_msglen += ROUNDUP(sizeof(struct sockaddr_in6)); | |
203 | /* adjust iovec */ | |
204 | iov[iovcnt].iov_base = &nexthop; | |
205 | iov[iovcnt++].iov_len = ROUNDUP(sizeof(struct sockaddr_in6)); | |
206 | ||
207 | /* If action is RTM_DELETE we have to get rid of MPLS infos */ | |
208 | if (action != RTM_DELETE) { | |
209 | memset(&sa_label_out, 0, sizeof(sa_label_out)); | |
210 | sa_label_out.smpls_len = sizeof(sa_label_out); | |
211 | sa_label_out.smpls_family = AF_MPLS; | |
212 | sa_label_out.smpls_label = | |
213 | htonl(nhlfe->nexthop->nh_label->label[0] | |
214 | << MPLS_LABEL_OFFSET); | |
215 | /* adjust header */ | |
216 | hdr.rtm_addrs |= RTA_SRC; | |
217 | hdr.rtm_flags |= RTF_MPLS; | |
218 | hdr.rtm_msglen += sizeof(sa_label_out); | |
219 | /* adjust iovec */ | |
220 | iov[iovcnt].iov_base = &sa_label_out; | |
221 | iov[iovcnt++].iov_len = sizeof(sa_label_out); | |
222 | ||
223 | if (nhlfe->nexthop->nh_label->label[0] == MPLS_LABEL_IMPLNULL) | |
224 | hdr.rtm_mpls = MPLS_OP_POP; | |
225 | else | |
226 | hdr.rtm_mpls = MPLS_OP_SWAP; | |
227 | } | |
228 | ||
0cf6db21 | 229 | frr_with_privs(&zserv_privs) { |
01b9e3fd DL |
230 | ret = writev(kr_state.fd, iov, iovcnt); |
231 | } | |
d62a17ae | 232 | |
233 | if (ret == -1) | |
450971aa | 234 | flog_err_sys(EC_LIB_SOCKET, "%s: %s", __func__, |
09c866e3 | 235 | safe_strerror(errno)); |
d62a17ae | 236 | |
237 | return ret; | |
d3e2c74a RW |
238 | } |
239 | ||
fc608372 | 240 | static int kernel_lsp_cmd(struct zebra_dplane_ctx *ctx) |
d3e2c74a | 241 | { |
81793ac1 | 242 | const zebra_nhlfe_t *nhlfe; |
d62a17ae | 243 | struct nexthop *nexthop = NULL; |
244 | unsigned int nexthop_num = 0; | |
fc608372 MS |
245 | int action; |
246 | ||
247 | switch (dplane_ctx_get_op(ctx)) { | |
248 | case DPLANE_OP_LSP_DELETE: | |
249 | action = RTM_DELETE; | |
250 | break; | |
251 | case DPLANE_OP_LSP_INSTALL: | |
252 | action = RTM_ADD; | |
253 | break; | |
254 | case DPLANE_OP_LSP_UPDATE: | |
255 | action = RTM_CHANGE; | |
256 | break; | |
257 | default: | |
258 | return -1; | |
259 | } | |
d62a17ae | 260 | |
fc608372 | 261 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); nhlfe; nhlfe = nhlfe->next) { |
d62a17ae | 262 | nexthop = nhlfe->nexthop; |
263 | if (!nexthop) | |
264 | continue; | |
265 | ||
b3f2b590 | 266 | if (nexthop_num >= zrouter.multipath_num) |
d62a17ae | 267 | break; |
268 | ||
269 | if (((action == RTM_ADD || action == RTM_CHANGE) | |
270 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
271 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE))) | |
272 | || (action == RTM_DELETE | |
273 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
274 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)))) { | |
5e8c8947 | 275 | if (nhlfe->nexthop->nh_label->num_labels > 1) { |
e914ccbe | 276 | flog_warn(EC_ZEBRA_MAX_LABELS_PUSH, |
9df414fe QY |
277 | "%s: can't push %u labels at once " |
278 | "(maximum is 1)", | |
279 | __func__, | |
280 | nhlfe->nexthop->nh_label->num_labels); | |
5e8c8947 RW |
281 | continue; |
282 | } | |
283 | ||
d62a17ae | 284 | nexthop_num++; |
285 | ||
286 | switch (NHLFE_FAMILY(nhlfe)) { | |
287 | case AF_INET: | |
fc608372 MS |
288 | kernel_send_rtmsg_v4( |
289 | action, | |
290 | dplane_ctx_get_in_label(ctx), | |
291 | nhlfe); | |
d62a17ae | 292 | break; |
293 | case AF_INET6: | |
fc608372 MS |
294 | kernel_send_rtmsg_v6( |
295 | action, | |
296 | dplane_ctx_get_in_label(ctx), | |
297 | nhlfe); | |
d62a17ae | 298 | break; |
299 | default: | |
300 | break; | |
301 | } | |
d62a17ae | 302 | } |
303 | } | |
304 | ||
305 | return (0); | |
d3e2c74a RW |
306 | } |
307 | ||
fc608372 | 308 | enum zebra_dplane_result kernel_lsp_update(struct zebra_dplane_ctx *ctx) |
d3e2c74a | 309 | { |
d62a17ae | 310 | int ret; |
c4c8dec0 | 311 | |
fc608372 | 312 | ret = kernel_lsp_cmd(ctx); |
c4c8dec0 | 313 | |
fc608372 MS |
314 | return (ret == 0 ? |
315 | ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE); | |
16c628de MS |
316 | } |
317 | ||
97d8d05a | 318 | static enum zebra_dplane_result kmpw_install(struct zebra_dplane_ctx *ctx) |
d42127da RW |
319 | { |
320 | struct ifreq ifr; | |
321 | struct ifmpwreq imr; | |
322 | struct sockaddr_storage ss; | |
323 | struct sockaddr_in *sa_in = (struct sockaddr_in *)&ss; | |
324 | struct sockaddr_in6 *sa_in6 = (struct sockaddr_in6 *)&ss; | |
97d8d05a | 325 | const union g_addr *gaddr; |
d42127da RW |
326 | |
327 | memset(&imr, 0, sizeof(imr)); | |
97d8d05a | 328 | switch (dplane_ctx_get_pw_type(ctx)) { |
d42127da RW |
329 | case PW_TYPE_ETHERNET: |
330 | imr.imr_type = IMR_TYPE_ETHERNET; | |
331 | break; | |
332 | case PW_TYPE_ETHERNET_TAGGED: | |
333 | imr.imr_type = IMR_TYPE_ETHERNET_TAGGED; | |
334 | break; | |
335 | default: | |
9df414fe | 336 | zlog_debug("%s: unhandled pseudowire type (%#X)", __func__, |
97d8d05a MS |
337 | dplane_ctx_get_pw_type(ctx)); |
338 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
d42127da RW |
339 | } |
340 | ||
97d8d05a | 341 | if (dplane_ctx_get_pw_flags(ctx) & F_PSEUDOWIRE_CWORD) |
d42127da RW |
342 | imr.imr_flags |= IMR_FLAG_CONTROLWORD; |
343 | ||
344 | /* pseudowire nexthop */ | |
345 | memset(&ss, 0, sizeof(ss)); | |
16d69787 | 346 | gaddr = dplane_ctx_get_pw_dest(ctx); |
97d8d05a | 347 | switch (dplane_ctx_get_pw_af(ctx)) { |
d42127da RW |
348 | case AF_INET: |
349 | sa_in->sin_family = AF_INET; | |
350 | sa_in->sin_len = sizeof(struct sockaddr_in); | |
97d8d05a | 351 | sa_in->sin_addr = gaddr->ipv4; |
d42127da RW |
352 | break; |
353 | case AF_INET6: | |
354 | sa_in6->sin6_family = AF_INET6; | |
355 | sa_in6->sin6_len = sizeof(struct sockaddr_in6); | |
97d8d05a | 356 | sa_in6->sin6_addr = gaddr->ipv6; |
d42127da RW |
357 | break; |
358 | default: | |
9df414fe | 359 | zlog_debug("%s: unhandled pseudowire address-family (%u)", |
97d8d05a MS |
360 | __func__, dplane_ctx_get_pw_af(ctx)); |
361 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
d42127da RW |
362 | } |
363 | memcpy(&imr.imr_nexthop, (struct sockaddr *)&ss, | |
364 | sizeof(imr.imr_nexthop)); | |
365 | ||
366 | /* pseudowire local/remote labels */ | |
97d8d05a MS |
367 | imr.imr_lshim.shim_label = dplane_ctx_get_pw_local_label(ctx); |
368 | imr.imr_rshim.shim_label = dplane_ctx_get_pw_remote_label(ctx); | |
d42127da RW |
369 | |
370 | /* ioctl */ | |
371 | memset(&ifr, 0, sizeof(ifr)); | |
7c7ef4a8 | 372 | strlcpy(ifr.ifr_name, dplane_ctx_get_ifname(ctx), |
97d8d05a | 373 | sizeof(ifr.ifr_name)); |
d42127da RW |
374 | ifr.ifr_data = (caddr_t)&imr; |
375 | if (ioctl(kr_state.ioctl_fd, SIOCSETMPWCFG, &ifr) == -1) { | |
450971aa | 376 | flog_err_sys(EC_LIB_SYSTEM_CALL, "ioctl SIOCSETMPWCFG: %s", |
09c866e3 | 377 | safe_strerror(errno)); |
97d8d05a | 378 | return ZEBRA_DPLANE_REQUEST_FAILURE; |
d42127da RW |
379 | } |
380 | ||
97d8d05a | 381 | return ZEBRA_DPLANE_REQUEST_SUCCESS; |
d42127da RW |
382 | } |
383 | ||
97d8d05a | 384 | static enum zebra_dplane_result kmpw_uninstall(struct zebra_dplane_ctx *ctx) |
d42127da RW |
385 | { |
386 | struct ifreq ifr; | |
387 | struct ifmpwreq imr; | |
388 | ||
389 | memset(&ifr, 0, sizeof(ifr)); | |
390 | memset(&imr, 0, sizeof(imr)); | |
7c7ef4a8 | 391 | strlcpy(ifr.ifr_name, dplane_ctx_get_ifname(ctx), |
97d8d05a | 392 | sizeof(ifr.ifr_name)); |
d42127da RW |
393 | ifr.ifr_data = (caddr_t)&imr; |
394 | if (ioctl(kr_state.ioctl_fd, SIOCSETMPWCFG, &ifr) == -1) { | |
450971aa | 395 | flog_err_sys(EC_LIB_SYSTEM_CALL, "ioctl SIOCSETMPWCFG: %s", |
09c866e3 | 396 | safe_strerror(errno)); |
97d8d05a | 397 | return ZEBRA_DPLANE_REQUEST_FAILURE; |
d42127da RW |
398 | } |
399 | ||
97d8d05a MS |
400 | return ZEBRA_DPLANE_REQUEST_SUCCESS; |
401 | } | |
402 | ||
403 | /* | |
404 | * Pseudowire update api for openbsd. | |
405 | */ | |
406 | enum zebra_dplane_result kernel_pw_update(struct zebra_dplane_ctx *ctx) | |
407 | { | |
408 | enum zebra_dplane_result result = ZEBRA_DPLANE_REQUEST_FAILURE; | |
409 | ||
410 | switch (dplane_ctx_get_op(ctx)) { | |
411 | case DPLANE_OP_PW_INSTALL: | |
412 | result = kmpw_install(ctx); | |
413 | break; | |
414 | case DPLANE_OP_PW_UNINSTALL: | |
415 | result = kmpw_uninstall(ctx); | |
416 | break; | |
417 | default: | |
418 | break; | |
5b94ec50 | 419 | } |
97d8d05a MS |
420 | |
421 | return result; | |
d42127da RW |
422 | } |
423 | ||
d3e2c74a | 424 | #define MAX_RTSOCK_BUF 128 * 1024 |
d62a17ae | 425 | int mpls_kernel_init(void) |
d3e2c74a | 426 | { |
d62a17ae | 427 | int rcvbuf, default_rcvbuf; |
428 | socklen_t optlen; | |
429 | ||
430 | if ((kr_state.fd = socket(AF_ROUTE, SOCK_RAW, 0)) == -1) { | |
450971aa | 431 | flog_err_sys(EC_LIB_SOCKET, "%s: socket", __func__); |
d62a17ae | 432 | return -1; |
433 | } | |
434 | ||
d42127da RW |
435 | if ((kr_state.ioctl_fd = socket(AF_INET, SOCK_DGRAM | SOCK_NONBLOCK, 0)) |
436 | == -1) { | |
450971aa | 437 | flog_err_sys(EC_LIB_SOCKET, "%s: ioctl socket", __func__); |
d42127da RW |
438 | return -1; |
439 | } | |
440 | ||
d62a17ae | 441 | /* grow receive buffer, don't wanna miss messages */ |
442 | optlen = sizeof(default_rcvbuf); | |
443 | if (getsockopt(kr_state.fd, SOL_SOCKET, SO_RCVBUF, &default_rcvbuf, | |
444 | &optlen) | |
445 | == -1) | |
450971aa | 446 | flog_err_sys(EC_LIB_SOCKET, |
9df414fe | 447 | "kr_init getsockopt SOL_SOCKET SO_RCVBUF"); |
d62a17ae | 448 | else |
449 | for (rcvbuf = MAX_RTSOCK_BUF; | |
450 | rcvbuf > default_rcvbuf | |
451 | && setsockopt(kr_state.fd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, | |
452 | sizeof(rcvbuf)) | |
453 | == -1 | |
454 | && errno == ENOBUFS; | |
455 | rcvbuf /= 2) | |
456 | ; /* nothing */ | |
457 | ||
458 | kr_state.rtseq = 1; | |
459 | ||
460 | return 0; | |
d3e2c74a | 461 | } |
ddfeb486 DL |
462 | |
463 | #endif /* OPEN_BSD */ |