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FreeBSD/Linux Kernel Cross Reference
sys/netipsec/xform_ipcomp.c

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    1 /*      $FreeBSD: src/sys/netipsec/xform_ipcomp.c,v 1.1 2002/10/16 02:10:08 sam Exp $   */
    2 /* $OpenBSD: ip_ipcomp.c,v 1.1 2001/07/05 12:08:52 jjbg Exp $ */
    3 
    4 /*
    5  * Copyright (c) 2001 Jean-Jacques Bernard-Gundol (jj@wabbitt.org)
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  *
   11  * 1. Redistributions of source code must retain the above copyright
   12  *   notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *   notice, this list of conditions and the following disclaimer in the
   15  *   documentation and/or other materials provided with the distribution.
   16  * 3. The name of the author may not be used to endorse or promote products
   17  *   derived from this software without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   29  */
   30 
   31 /* IP payload compression protocol (IPComp), see RFC 2393 */
   32 #include "opt_inet.h"
   33 #include "opt_inet6.h"
   34 
   35 #include <sys/param.h>
   36 #include <sys/systm.h>
   37 #include <sys/mbuf.h>
   38 #include <sys/socket.h>
   39 #include <sys/kernel.h>
   40 #include <sys/protosw.h>
   41 #include <sys/sysctl.h>
   42 
   43 #include <netinet/in.h>
   44 #include <netinet/in_systm.h>
   45 #include <netinet/ip.h>
   46 #include <netinet/ip_var.h>
   47 
   48 #include <net/route.h>
   49 #include <netipsec/ipsec.h>
   50 #include <netipsec/xform.h>
   51 
   52 #ifdef INET6
   53 #include <netinet/ip6.h>
   54 #include <netipsec/ipsec6.h>
   55 #endif
   56 
   57 #include <netipsec/ipcomp.h>
   58 #include <netipsec/ipcomp_var.h>
   59 
   60 #include <netipsec/key.h>
   61 #include <netipsec/key_debug.h>
   62 
   63 #include <opencrypto/cryptodev.h>
   64 #include <opencrypto/deflate.h>
   65 #include <opencrypto/xform.h>
   66 
   67 int     ipcomp_enable = 0;
   68 struct  ipcompstat ipcompstat;
   69 
   70 SYSCTL_DECL(_net_inet_ipcomp);
   71 SYSCTL_INT(_net_inet_ipcomp, OID_AUTO,
   72         ipcomp_enable,  CTLFLAG_RW,     &ipcomp_enable, 0, "");
   73 SYSCTL_STRUCT(_net_inet_ipcomp, IPSECCTL_STATS,
   74         stats,          CTLFLAG_RD,     &ipcompstat,    ipcompstat, "");
   75 
   76 static int ipcomp_input_cb(struct cryptop *crp);
   77 static int ipcomp_output_cb(struct cryptop *crp);
   78 
   79 struct comp_algo *
   80 ipcomp_algorithm_lookup(int alg)
   81 {
   82         if (alg >= IPCOMP_ALG_MAX)
   83                 return NULL;
   84         switch (alg) {
   85         case SADB_X_CALG_DEFLATE:
   86                 return &comp_algo_deflate;
   87         }
   88         return NULL;
   89 }
   90 
   91 /*
   92  * ipcomp_init() is called when an CPI is being set up.
   93  */
   94 static int
   95 ipcomp_init(struct secasvar *sav, struct xformsw *xsp)
   96 {
   97         struct comp_algo *tcomp;
   98         struct cryptoini cric;
   99 
  100         /* NB: algorithm really comes in alg_enc and not alg_comp! */
  101         tcomp = ipcomp_algorithm_lookup(sav->alg_enc);
  102         if (tcomp == NULL) {
  103                 DPRINTF(("ipcomp_init: unsupported compression algorithm %d\n",
  104                          sav->alg_comp));
  105                 return EINVAL;
  106         }
  107         sav->alg_comp = sav->alg_enc;           /* set for doing histogram */
  108         sav->tdb_xform = xsp;
  109         sav->tdb_compalgxform = tcomp;
  110 
  111         /* Initialize crypto session */
  112         bzero(&cric, sizeof (cric));
  113         cric.cri_alg = sav->tdb_compalgxform->type;
  114 
  115         return crypto_newsession(&sav->tdb_cryptoid, &cric, crypto_support);
  116 }
  117 
  118 /*
  119  * ipcomp_zeroize() used when IPCA is deleted
  120  */
  121 static int
  122 ipcomp_zeroize(struct secasvar *sav)
  123 {
  124         int err;
  125 
  126         err = crypto_freesession(sav->tdb_cryptoid);
  127         sav->tdb_cryptoid = 0;
  128         return err;
  129 }
  130 
  131 /*
  132  * ipcomp_input() gets called to uncompress an input packet
  133  */
  134 static int
  135 ipcomp_input(struct mbuf *m, struct secasvar *sav, int skip, int protoff)
  136 {
  137         struct tdb_crypto *tc;
  138         struct cryptodesc *crdc;
  139         struct cryptop *crp;
  140         int hlen = IPCOMP_HLENGTH;
  141 
  142 #if 0
  143         SPLASSERT(net, "ipcomp_input");
  144 #endif
  145 
  146         /* Get crypto descriptors */
  147         crp = crypto_getreq(1);
  148         if (crp == NULL) {
  149                 m_freem(m);
  150                 DPRINTF(("ipcomp_input: no crypto descriptors\n"));
  151                 ipcompstat.ipcomps_crypto++;
  152                 return ENOBUFS;
  153         }
  154         /* Get IPsec-specific opaque pointer */
  155         tc = (struct tdb_crypto *) malloc(sizeof (*tc), M_XDATA, M_NOWAIT|M_ZERO);
  156         if (tc == NULL) {
  157                 m_freem(m);
  158                 crypto_freereq(crp);
  159                 DPRINTF(("ipcomp_input: cannot allocate tdb_crypto\n"));
  160                 ipcompstat.ipcomps_crypto++;
  161                 return ENOBUFS;
  162         }
  163         crdc = crp->crp_desc;
  164 
  165         crdc->crd_skip = skip + hlen;
  166         crdc->crd_len = m->m_pkthdr.len - (skip + hlen);
  167         crdc->crd_inject = skip;
  168 
  169         tc->tc_ptr = 0;
  170 
  171         /* Decompression operation */
  172         crdc->crd_alg = sav->tdb_compalgxform->type;
  173 
  174         /* Crypto operation descriptor */
  175         crp->crp_ilen = m->m_pkthdr.len - (skip + hlen);
  176         crp->crp_flags = CRYPTO_F_IMBUF | CRYPTO_F_NODELAY;
  177         crp->crp_buf = (caddr_t) m;
  178         crp->crp_callback = ipcomp_input_cb;
  179         crp->crp_sid = sav->tdb_cryptoid;
  180         crp->crp_opaque = (caddr_t) tc;
  181 
  182         /* These are passed as-is to the callback */
  183         tc->tc_spi = sav->spi;
  184         tc->tc_dst = sav->sah->saidx.dst;
  185         tc->tc_proto = sav->sah->saidx.proto;
  186         tc->tc_protoff = protoff;
  187         tc->tc_skip = skip;
  188 
  189         return crypto_dispatch(crp);
  190 }
  191 
  192 #ifdef INET6
  193 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) do {              \
  194         if (saidx->dst.sa.sa_family == AF_INET6) {                           \
  195                 error = ipsec6_common_input_cb(m, sav, skip, protoff, mtag); \
  196         } else {                                                             \
  197                 error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag); \
  198         }                                                                    \
  199 } while (0)
  200 #else
  201 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag)                   \
  202         (error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag))
  203 #endif
  204 
  205 /*
  206  * IPComp input callback from the crypto driver.
  207  */
  208 static int
  209 ipcomp_input_cb(struct cryptop *crp)
  210 {
  211         struct cryptodesc *crd;
  212         struct tdb_crypto *tc;
  213         int skip, protoff;
  214         struct mtag *mtag;
  215         struct mbuf *m;
  216         struct secasvar *sav;
  217         struct secasindex *saidx;
  218         int s, hlen = IPCOMP_HLENGTH, error, clen;
  219         u_int8_t nproto;
  220         caddr_t addr;
  221 
  222         crd = crp->crp_desc;
  223 
  224         tc = (struct tdb_crypto *) crp->crp_opaque;
  225         KASSERT(tc != NULL, ("ipcomp_input_cb: null opaque crypto data area!"));
  226         skip = tc->tc_skip;
  227         protoff = tc->tc_protoff;
  228         mtag = (struct mtag *) tc->tc_ptr;
  229         m = (struct mbuf *) crp->crp_buf;
  230 
  231         s = splnet();
  232 
  233         sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi);
  234         if (sav == NULL) {
  235                 ipcompstat.ipcomps_notdb++;
  236                 DPRINTF(("ipcomp_input_cb: SA expired while in crypto\n"));
  237                 error = ENOBUFS;                /*XXX*/
  238                 goto bad;
  239         }
  240 
  241         saidx = &sav->sah->saidx;
  242         KASSERT(saidx->dst.sa.sa_family == AF_INET ||
  243                 saidx->dst.sa.sa_family == AF_INET6,
  244                 ("ah_input_cb: unexpected protocol family %u",
  245                  saidx->dst.sa.sa_family));
  246 
  247         /* Check for crypto errors */
  248         if (crp->crp_etype) {
  249                 /* Reset the session ID */
  250                 if (sav->tdb_cryptoid != 0)
  251                         sav->tdb_cryptoid = crp->crp_sid;
  252 
  253                 if (crp->crp_etype == EAGAIN) {
  254                         KEY_FREESAV(&sav);
  255                         splx(s);
  256                         return crypto_dispatch(crp);
  257                 }
  258 
  259                 ipcompstat.ipcomps_noxform++;
  260                 DPRINTF(("ipcomp_input_cb: crypto error %d\n", crp->crp_etype));
  261                 error = crp->crp_etype;
  262                 goto bad;
  263         }
  264         /* Shouldn't happen... */
  265         if (m == NULL) {
  266                 ipcompstat.ipcomps_crypto++;
  267                 DPRINTF(("ipcomp_input_cb: null mbuf returned from crypto\n"));
  268                 error = EINVAL;
  269                 goto bad;
  270         }
  271         ipcompstat.ipcomps_hist[sav->alg_comp]++;
  272 
  273         clen = crp->crp_olen;           /* Length of data after processing */
  274 
  275         /* Release the crypto descriptors */
  276         free(tc, M_XDATA), tc = NULL;
  277         crypto_freereq(crp), crp = NULL;
  278 
  279         /* In case it's not done already, adjust the size of the mbuf chain */
  280         m->m_pkthdr.len = clen + hlen + skip;
  281 
  282         if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) {
  283                 ipcompstat.ipcomps_hdrops++;            /*XXX*/
  284                 DPRINTF(("ipcomp_input_cb: m_pullup failed\n"));
  285                 error = EINVAL;                         /*XXX*/
  286                 goto bad;
  287         }
  288 
  289         /* Keep the next protocol field */
  290         addr = (caddr_t) mtod(m, struct ip *) + skip;
  291         nproto = ((struct ipcomp *) addr)->comp_nxt;
  292 
  293         /* Remove the IPCOMP header */
  294         error = m_striphdr(m, skip, hlen);
  295         if (error) {
  296                 ipcompstat.ipcomps_hdrops++;
  297                 DPRINTF(("ipcomp_input_cb: bad mbuf chain, IPCA %s/%08lx\n",
  298                          ipsec_address(&sav->sah->saidx.dst),
  299                          (u_long) ntohl(sav->spi)));
  300                 goto bad;
  301         }
  302 
  303         /* Restore the Next Protocol field */
  304         m_copyback(m, protoff, sizeof (u_int8_t), (u_int8_t *) &nproto);
  305 
  306         IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, NULL);
  307 
  308         KEY_FREESAV(&sav);
  309         splx(s);
  310         return error;
  311 bad:
  312         if (sav)
  313                 KEY_FREESAV(&sav);
  314         splx(s);
  315         if (m)
  316                 m_freem(m);
  317         if (tc != NULL)
  318                 free(tc, M_XDATA);
  319         if (crp)
  320                 crypto_freereq(crp);
  321         return error;
  322 }
  323 
  324 /*
  325  * IPComp output routine, called by ipsec[46]_process_packet()
  326  */
  327 static int
  328 ipcomp_output(
  329         struct mbuf *m,
  330         struct ipsecrequest *isr,
  331         struct mbuf **mp,
  332         int skip,
  333         int protoff
  334 )
  335 {
  336         struct secasvar *sav;
  337         struct comp_algo *ipcompx;
  338         int error, ralen, hlen, maxpacketsize, roff;
  339         u_int8_t prot;
  340         struct cryptodesc *crdc;
  341         struct cryptop *crp;
  342         struct tdb_crypto *tc;
  343         struct mbuf *mo;
  344         struct ipcomp *ipcomp;
  345 
  346 #if 0
  347         SPLASSERT(net, "ipcomp_output");
  348 #endif
  349 
  350         sav = isr->sav;
  351         KASSERT(sav != NULL, ("ipcomp_output: null SA"));
  352         ipcompx = sav->tdb_compalgxform;
  353         KASSERT(ipcompx != NULL, ("ipcomp_output: null compression xform"));
  354 
  355         ralen = m->m_pkthdr.len - skip; /* Raw payload length before comp. */
  356         hlen = IPCOMP_HLENGTH;
  357 
  358         ipcompstat.ipcomps_output++;
  359 
  360         /* Check for maximum packet size violations. */
  361         switch (sav->sah->saidx.dst.sa.sa_family) {
  362 #ifdef INET
  363         case AF_INET:
  364                 maxpacketsize =  IP_MAXPACKET;
  365                 break;
  366 #endif /* INET */
  367 #ifdef INET6
  368         case AF_INET6:
  369                 maxpacketsize =  IPV6_MAXPACKET;
  370                 break;
  371 #endif /* INET6 */
  372         default:
  373                 ipcompstat.ipcomps_nopf++;
  374                 DPRINTF(("ipcomp_output: unknown/unsupported protocol family %d"
  375                     ", IPCA %s/%08lx\n", 
  376                     sav->sah->saidx.dst.sa.sa_family,
  377                     ipsec_address(&sav->sah->saidx.dst),
  378                     (u_long) ntohl(sav->spi)));
  379                 error = EPFNOSUPPORT;
  380                 goto bad;
  381         }
  382         if (skip + hlen + ralen > maxpacketsize) {
  383                 ipcompstat.ipcomps_toobig++;
  384                 DPRINTF(("ipcomp_output: packet in IPCA %s/%08lx got too big "
  385                     "(len %u, max len %u)\n",
  386                     ipsec_address(&sav->sah->saidx.dst),
  387                     (u_long) ntohl(sav->spi),
  388                     skip + hlen + ralen, maxpacketsize));
  389                 error = EMSGSIZE;
  390                 goto bad;
  391         }
  392 
  393         /* Update the counters */
  394         ipcompstat.ipcomps_obytes += m->m_pkthdr.len - skip;
  395 
  396         m = m_clone(m);
  397         if (m == NULL) {
  398                 ipcompstat.ipcomps_hdrops++;
  399                 DPRINTF(("ipcomp_output: cannot clone mbuf chain, IPCA %s/%08lx\n", 
  400                     ipsec_address(&sav->sah->saidx.dst),
  401                     (u_long) ntohl(sav->spi)));
  402                 error = ENOBUFS;
  403                 goto bad;
  404         }
  405 
  406         /* Inject IPCOMP header */
  407         mo = m_makespace(m, skip, hlen, &roff);
  408         if (mo == NULL) {
  409                 ipcompstat.ipcomps_wrap++;
  410                 DPRINTF(("ipcomp_output: failed to inject IPCOMP header for "
  411                     "IPCA %s/%08lx\n",
  412                     ipsec_address(&sav->sah->saidx.dst),
  413                     (u_long) ntohl(sav->spi)));
  414                 error = ENOBUFS;
  415                 goto bad;
  416         }
  417         ipcomp = (struct ipcomp *)(mtod(mo, caddr_t) + roff);
  418 
  419         /* Initialize the IPCOMP header */
  420         /* XXX alignment always correct? */
  421         switch (sav->sah->saidx.dst.sa.sa_family) {
  422 #ifdef INET
  423         case AF_INET:
  424                 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p;
  425                 break;
  426 #endif /* INET */
  427 #ifdef INET6
  428         case AF_INET6:
  429                 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt;
  430                 break;
  431 #endif
  432         }
  433         ipcomp->comp_flags = 0;
  434         ipcomp->comp_cpi = htons((u_int16_t) ntohl(sav->spi));
  435 
  436         /* Fix Next Protocol in IPv4/IPv6 header */
  437         prot = IPPROTO_IPCOMP;
  438         m_copyback(m, protoff, sizeof(u_int8_t), (u_char *) &prot);
  439 
  440         /* Ok now, we can pass to the crypto processing */
  441 
  442         /* Get crypto descriptors */
  443         crp = crypto_getreq(1);
  444         if (crp == NULL) {
  445                 ipcompstat.ipcomps_crypto++;
  446                 DPRINTF(("ipcomp_output: failed to acquire crypto descriptor\n"));
  447                 error = ENOBUFS;
  448                 goto bad;
  449         }
  450         crdc = crp->crp_desc;
  451 
  452         /* Compression descriptor */
  453         crdc->crd_skip = skip + hlen;
  454         crdc->crd_len = m->m_pkthdr.len - (skip + hlen);
  455         crdc->crd_flags = CRD_F_COMP;
  456         crdc->crd_inject = skip + hlen;
  457 
  458         /* Compression operation */
  459         crdc->crd_alg = ipcompx->type;
  460 
  461         /* IPsec-specific opaque crypto info */
  462         tc = (struct tdb_crypto *) malloc(sizeof(struct tdb_crypto),
  463                 M_XDATA, M_NOWAIT|M_ZERO);
  464         if (tc == NULL) {
  465                 ipcompstat.ipcomps_crypto++;
  466                 DPRINTF(("ipcomp_output: failed to allocate tdb_crypto\n"));
  467                 crypto_freereq(crp);
  468                 error = ENOBUFS;
  469                 goto bad;
  470         }
  471 
  472         tc->tc_isr = isr;
  473         tc->tc_spi = sav->spi;
  474         tc->tc_dst = sav->sah->saidx.dst;
  475         tc->tc_proto = sav->sah->saidx.proto;
  476         tc->tc_skip = skip + hlen;
  477 
  478         /* Crypto operation descriptor */
  479         crp->crp_ilen = m->m_pkthdr.len;        /* Total input length */
  480         crp->crp_flags = CRYPTO_F_IMBUF;
  481         crp->crp_buf = (caddr_t) m;
  482         crp->crp_callback = ipcomp_output_cb;
  483         crp->crp_opaque = (caddr_t) tc;
  484         crp->crp_sid = sav->tdb_cryptoid;
  485 
  486         return crypto_dispatch(crp);
  487 bad:
  488         if (m)
  489                 m_freem(m);
  490         return (error);
  491 }
  492 
  493 /*
  494  * IPComp output callback from the crypto driver.
  495  */
  496 static int
  497 ipcomp_output_cb(struct cryptop *crp)
  498 {
  499         struct tdb_crypto *tc;
  500         struct ipsecrequest *isr;
  501         struct secasvar *sav;
  502         struct mbuf *m;
  503         int s, error, skip, rlen;
  504 
  505         tc = (struct tdb_crypto *) crp->crp_opaque;
  506         KASSERT(tc != NULL, ("ipcomp_output_cb: null opaque data area!"));
  507         m = (struct mbuf *) crp->crp_buf;
  508         skip = tc->tc_skip;
  509         rlen = crp->crp_ilen - skip;
  510 
  511         s = splnet();
  512 
  513         isr = tc->tc_isr;
  514         sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi);
  515         if (sav == NULL) {
  516                 ipcompstat.ipcomps_notdb++;
  517                 DPRINTF(("ipcomp_output_cb: SA expired while in crypto\n"));
  518                 error = ENOBUFS;                /*XXX*/
  519                 goto bad;
  520         }
  521         KASSERT(isr->sav == sav, ("ipcomp_output_cb: SA changed\n"));
  522 
  523         /* Check for crypto errors */
  524         if (crp->crp_etype) {
  525                 /* Reset session ID */
  526                 if (sav->tdb_cryptoid != 0)
  527                         sav->tdb_cryptoid = crp->crp_sid;
  528 
  529                 if (crp->crp_etype == EAGAIN) {
  530                         KEY_FREESAV(&sav);
  531                         splx(s);
  532                         return crypto_dispatch(crp);
  533                 }
  534                 ipcompstat.ipcomps_noxform++;
  535                 DPRINTF(("ipcomp_output_cb: crypto error %d\n", crp->crp_etype));
  536                 error = crp->crp_etype;
  537                 goto bad;
  538         }
  539         /* Shouldn't happen... */
  540         if (m == NULL) {
  541                 ipcompstat.ipcomps_crypto++;
  542                 DPRINTF(("ipcomp_output_cb: bogus return buffer from crypto\n"));
  543                 error = EINVAL;
  544                 goto bad;
  545         }
  546         ipcompstat.ipcomps_hist[sav->alg_comp]++;
  547 
  548         if (rlen > crp->crp_olen) {
  549                 /* Adjust the length in the IP header */
  550                 switch (sav->sah->saidx.dst.sa.sa_family) {
  551 #ifdef INET
  552                 case AF_INET:
  553                         mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len);
  554                         break;
  555 #endif /* INET */
  556 #ifdef INET6
  557                 case AF_INET6:
  558                         mtod(m, struct ip6_hdr *)->ip6_plen =
  559                                 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr);
  560                         break;
  561 #endif /* INET6 */
  562                 default:
  563                         ipcompstat.ipcomps_nopf++;
  564                         DPRINTF(("ipcomp_output: unknown/unsupported protocol "
  565                             "family %d, IPCA %s/%08lx\n", 
  566                             sav->sah->saidx.dst.sa.sa_family,
  567                             ipsec_address(&sav->sah->saidx.dst), 
  568                             (u_long) ntohl(sav->spi)));
  569                         error = EPFNOSUPPORT;
  570                         goto bad;
  571                 }
  572         } else {
  573                 /* compression was useless, we have lost time */
  574                 /* XXX add statistic */
  575         }
  576 
  577         /* Release the crypto descriptor */
  578         free(tc, M_XDATA);
  579         crypto_freereq(crp);
  580 
  581         /* NB: m is reclaimed by ipsec_process_done. */
  582         error = ipsec_process_done(m, isr);
  583         KEY_FREESAV(&sav);
  584         splx(s);
  585         return error;
  586 bad:
  587         if (sav)
  588                 KEY_FREESAV(&sav);
  589         splx(s);
  590         if (m)
  591                 m_freem(m);
  592         free(tc, M_XDATA);
  593         crypto_freereq(crp);
  594         return error;
  595 }
  596 
  597 static struct xformsw ipcomp_xformsw = {
  598         XF_IPCOMP,              XFT_COMP,               "IPcomp",
  599         ipcomp_init,            ipcomp_zeroize,         ipcomp_input,
  600         ipcomp_output
  601 };
  602 
  603 static void
  604 ipcomp_attach(void)
  605 {
  606         xform_register(&ipcomp_xformsw);
  607 }
  608 SYSINIT(ipcomp_xform_init, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipcomp_attach, NULL)

Cache object: a34e2ab3cf0c9b65844483d519cfaafc


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