| /* |
| * Copyright (C) 2011 by Darren Reed. |
| * |
| * See the IPFILTER.LICENCE file for details on licencing. |
| */ |
| #if defined(KERNEL) || defined(_KERNEL) |
| # undef KERNEL |
| # undef _KERNEL |
| # define KERNEL 1 |
| # define _KERNEL 1 |
| #endif |
| #include <sys/errno.h> |
| #include <sys/types.h> |
| #include <sys/param.h> |
| #include <sys/file.h> |
| #if !defined(_KERNEL) && !defined(__KERNEL__) |
| # include <stdio.h> |
| # include <stdlib.h> |
| # include <string.h> |
| # define _KERNEL |
| # define KERNEL |
| # ifdef __OpenBSD__ |
| struct file; |
| # endif |
| # include <sys/uio.h> |
| # undef _KERNEL |
| # undef KERNEL |
| #else |
| # include <sys/systm.h> |
| # if !defined(__SVR4) && !defined(__svr4__) |
| # include <sys/mbuf.h> |
| # endif |
| # include <sys/select.h> |
| # if __FreeBSD_version >= 500000 |
| # include <sys/selinfo.h> |
| # endif |
| #endif |
| #if defined(__NetBSD__) && (__NetBSD_Version__ >= 104000000) |
| # include <sys/proc.h> |
| #endif |
| #if defined(_KERNEL) && (__FreeBSD_version >= 220000) |
| # include <sys/filio.h> |
| # include <sys/fcntl.h> |
| #else |
| # include <sys/ioctl.h> |
| #endif |
| #include <sys/time.h> |
| #if !defined(linux) |
| # include <sys/protosw.h> |
| #endif |
| #include <sys/socket.h> |
| #if defined(__SVR4) || defined(__svr4__) |
| # include <sys/filio.h> |
| # include <sys/byteorder.h> |
| # ifdef _KERNEL |
| # include <sys/dditypes.h> |
| # endif |
| # include <sys/stream.h> |
| # include <sys/kmem.h> |
| #endif |
| |
| #include <net/if.h> |
| #ifdef sun |
| # include <net/af.h> |
| #endif |
| #include <netinet/in.h> |
| #include <netinet/in_systm.h> |
| #include <netinet/ip.h> |
| #include <netinet/tcp.h> |
| #if !defined(linux) |
| # include <netinet/ip_var.h> |
| #endif |
| #if !defined(__hpux) && !defined(linux) |
| # include <netinet/tcp_fsm.h> |
| #endif |
| #include <netinet/udp.h> |
| #include <netinet/ip_icmp.h> |
| #include "netinet/ip_compat.h" |
| #include <netinet/tcpip.h> |
| #include "netinet/ip_fil.h" |
| #include "netinet/ip_nat.h" |
| #include "netinet/ip_frag.h" |
| #include "netinet/ip_state.h" |
| #include "netinet/ip_proxy.h" |
| #include "netinet/ip_sync.h" |
| #ifdef USE_INET6 |
| #include <netinet/icmp6.h> |
| #endif |
| #if (__FreeBSD_version >= 300000) |
| # include <sys/malloc.h> |
| # if defined(_KERNEL) && !defined(IPFILTER_LKM) |
| # include <sys/libkern.h> |
| # include <sys/systm.h> |
| # endif |
| #endif |
| /* END OF INCLUDES */ |
| |
| #if !defined(lint) |
| static const char rcsid[] = "@(#)$Id$"; |
| #endif |
| |
| #define SYNC_STATETABSZ 256 |
| #define SYNC_NATTABSZ 256 |
| |
| typedef struct ipf_sync_softc_s { |
| ipfmutex_t ipf_syncadd; |
| ipfmutex_t ipsl_mutex; |
| ipfrwlock_t ipf_syncstate; |
| ipfrwlock_t ipf_syncnat; |
| #if SOLARIS && defined(_KERNEL) |
| kcondvar_t ipslwait; |
| #endif |
| #if defined(linux) && defined(_KERNEL) |
| wait_queue_head_t sl_tail_linux; |
| #endif |
| synclist_t **syncstatetab; |
| synclist_t **syncnattab; |
| synclogent_t *synclog; |
| syncupdent_t *syncupd; |
| u_int ipf_sync_num; |
| u_int ipf_sync_wrap; |
| u_int sl_idx; /* next available sync log entry */ |
| u_int su_idx; /* next available sync update entry */ |
| u_int sl_tail; /* next sync log entry to read */ |
| u_int su_tail; /* next sync update entry to read */ |
| int ipf_sync_log_sz; |
| int ipf_sync_nat_tab_sz; |
| int ipf_sync_state_tab_sz; |
| int ipf_sync_debug; |
| int ipf_sync_events; |
| u_32_t ipf_sync_lastwakeup; |
| int ipf_sync_wake_interval; |
| int ipf_sync_event_high_wm; |
| int ipf_sync_queue_high_wm; |
| int ipf_sync_inited; |
| } ipf_sync_softc_t; |
| |
| static int ipf_sync_flush_table __P((ipf_sync_softc_t *, int, synclist_t **)); |
| static void ipf_sync_wakeup __P((ipf_main_softc_t *)); |
| static void ipf_sync_del __P((ipf_sync_softc_t *, synclist_t *)); |
| static void ipf_sync_poll_wakeup __P((ipf_main_softc_t *)); |
| static int ipf_sync_nat __P((ipf_main_softc_t *, synchdr_t *, void *)); |
| static int ipf_sync_state __P((ipf_main_softc_t *, synchdr_t *, void *)); |
| |
| # if !defined(sparc) && !defined(__hppa) |
| void ipf_sync_tcporder __P((int, struct tcpdata *)); |
| void ipf_sync_natorder __P((int, struct nat *)); |
| void ipf_sync_storder __P((int, struct ipstate *)); |
| # endif |
| |
| |
| void * |
| ipf_sync_soft_create(softc) |
| ipf_main_softc_t *softc; |
| { |
| ipf_sync_softc_t *softs; |
| |
| KMALLOC(softs, ipf_sync_softc_t *); |
| if (softs == NULL) |
| return NULL; |
| |
| bzero((char *)softs, sizeof(*softs)); |
| |
| softs->ipf_sync_log_sz = SYNCLOG_SZ; |
| softs->ipf_sync_nat_tab_sz = SYNC_STATETABSZ; |
| softs->ipf_sync_state_tab_sz = SYNC_STATETABSZ; |
| softs->ipf_sync_event_high_wm = SYNCLOG_SZ * 100 / 90; /* 90% */ |
| softs->ipf_sync_queue_high_wm = SYNCLOG_SZ * 100 / 90; /* 90% */ |
| |
| return softs; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_init */ |
| /* Returns: int - 0 == success, -1 == failure */ |
| /* Parameters: Nil */ |
| /* */ |
| /* Initialise all of the locks required for the sync code and initialise */ |
| /* any data structures, as required. */ |
| /* ------------------------------------------------------------------------ */ |
| int |
| ipf_sync_soft_init(softc, arg) |
| ipf_main_softc_t *softc; |
| void *arg; |
| { |
| ipf_sync_softc_t *softs = arg; |
| |
| KMALLOCS(softs->synclog, synclogent_t *, |
| softs->ipf_sync_log_sz * sizeof(*softs->synclog)); |
| if (softs->synclog == NULL) |
| return -1; |
| bzero((char *)softs->synclog, |
| softs->ipf_sync_log_sz * sizeof(*softs->synclog)); |
| |
| KMALLOCS(softs->syncupd, syncupdent_t *, |
| softs->ipf_sync_log_sz * sizeof(*softs->syncupd)); |
| if (softs->syncupd == NULL) |
| return -2; |
| bzero((char *)softs->syncupd, |
| softs->ipf_sync_log_sz * sizeof(*softs->syncupd)); |
| |
| KMALLOCS(softs->syncstatetab, synclist_t **, |
| softs->ipf_sync_state_tab_sz * sizeof(*softs->syncstatetab)); |
| if (softs->syncstatetab == NULL) |
| return -3; |
| bzero((char *)softs->syncstatetab, |
| softs->ipf_sync_state_tab_sz * sizeof(*softs->syncstatetab)); |
| |
| KMALLOCS(softs->syncnattab, synclist_t **, |
| softs->ipf_sync_nat_tab_sz * sizeof(*softs->syncnattab)); |
| if (softs->syncnattab == NULL) |
| return -3; |
| bzero((char *)softs->syncnattab, |
| softs->ipf_sync_nat_tab_sz * sizeof(*softs->syncnattab)); |
| |
| softs->ipf_sync_num = 1; |
| softs->ipf_sync_wrap = 0; |
| softs->sl_idx = 0; |
| softs->su_idx = 0; |
| softs->sl_tail = 0; |
| softs->su_tail = 0; |
| softs->ipf_sync_events = 0; |
| softs->ipf_sync_lastwakeup = 0; |
| |
| |
| # if SOLARIS && defined(_KERNEL) |
| cv_init(&softs->ipslwait, "ipsl condvar", CV_DRIVER, NULL); |
| # endif |
| RWLOCK_INIT(&softs->ipf_syncstate, "add things to state sync table"); |
| RWLOCK_INIT(&softs->ipf_syncnat, "add things to nat sync table"); |
| MUTEX_INIT(&softs->ipf_syncadd, "add things to sync table"); |
| MUTEX_INIT(&softs->ipsl_mutex, "read ring lock"); |
| |
| softs->ipf_sync_inited = 1; |
| |
| return 0; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_unload */ |
| /* Returns: int - 0 == success, -1 == failure */ |
| /* Parameters: Nil */ |
| /* */ |
| /* Destroy the locks created when initialising and free any memory in use */ |
| /* with the synchronisation tables. */ |
| /* ------------------------------------------------------------------------ */ |
| int |
| ipf_sync_soft_fini(softc, arg) |
| ipf_main_softc_t *softc; |
| void *arg; |
| { |
| ipf_sync_softc_t *softs = arg; |
| |
| if (softs->syncnattab != NULL) { |
| ipf_sync_flush_table(softs, softs->ipf_sync_nat_tab_sz, |
| softs->syncnattab); |
| KFREES(softs->syncnattab, |
| softs->ipf_sync_nat_tab_sz * sizeof(*softs->syncnattab)); |
| softs->syncnattab = NULL; |
| } |
| |
| if (softs->syncstatetab != NULL) { |
| ipf_sync_flush_table(softs, softs->ipf_sync_state_tab_sz, |
| softs->syncstatetab); |
| KFREES(softs->syncstatetab, |
| softs->ipf_sync_state_tab_sz * |
| sizeof(*softs->syncstatetab)); |
| softs->syncstatetab = NULL; |
| } |
| |
| if (softs->syncupd != NULL) { |
| KFREES(softs->syncupd, |
| softs->ipf_sync_log_sz * sizeof(*softs->syncupd)); |
| softs->syncupd = NULL; |
| } |
| |
| if (softs->synclog != NULL) { |
| KFREES(softs->synclog, |
| softs->ipf_sync_log_sz * sizeof(*softs->synclog)); |
| softs->synclog = NULL; |
| } |
| |
| if (softs->ipf_sync_inited == 1) { |
| MUTEX_DESTROY(&softs->ipsl_mutex); |
| MUTEX_DESTROY(&softs->ipf_syncadd); |
| RW_DESTROY(&softs->ipf_syncnat); |
| RW_DESTROY(&softs->ipf_syncstate); |
| softs->ipf_sync_inited = 0; |
| } |
| |
| return 0; |
| } |
| |
| void |
| ipf_sync_soft_destroy(softc, arg) |
| ipf_main_softc_t *softc; |
| void *arg; |
| { |
| ipf_sync_softc_t *softs = arg; |
| |
| KFREE(softs); |
| } |
| |
| |
| # if !defined(sparc) && !defined(__hppa) |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_tcporder */ |
| /* Returns: Nil */ |
| /* Parameters: way(I) - direction of byte order conversion. */ |
| /* td(IO) - pointer to data to be converted. */ |
| /* */ |
| /* Do byte swapping on values in the TCP state information structure that */ |
| /* need to be used at both ends by the host in their native byte order. */ |
| /* ------------------------------------------------------------------------ */ |
| void |
| ipf_sync_tcporder(way, td) |
| int way; |
| tcpdata_t *td; |
| { |
| if (way) { |
| td->td_maxwin = htons(td->td_maxwin); |
| td->td_end = htonl(td->td_end); |
| td->td_maxend = htonl(td->td_maxend); |
| } else { |
| td->td_maxwin = ntohs(td->td_maxwin); |
| td->td_end = ntohl(td->td_end); |
| td->td_maxend = ntohl(td->td_maxend); |
| } |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_natorder */ |
| /* Returns: Nil */ |
| /* Parameters: way(I) - direction of byte order conversion. */ |
| /* nat(IO) - pointer to data to be converted. */ |
| /* */ |
| /* Do byte swapping on values in the NAT data structure that need to be */ |
| /* used at both ends by the host in their native byte order. */ |
| /* ------------------------------------------------------------------------ */ |
| void |
| ipf_sync_natorder(way, n) |
| int way; |
| nat_t *n; |
| { |
| if (way) { |
| n->nat_age = htonl(n->nat_age); |
| n->nat_flags = htonl(n->nat_flags); |
| n->nat_ipsumd = htonl(n->nat_ipsumd); |
| n->nat_use = htonl(n->nat_use); |
| n->nat_dir = htonl(n->nat_dir); |
| } else { |
| n->nat_age = ntohl(n->nat_age); |
| n->nat_flags = ntohl(n->nat_flags); |
| n->nat_ipsumd = ntohl(n->nat_ipsumd); |
| n->nat_use = ntohl(n->nat_use); |
| n->nat_dir = ntohl(n->nat_dir); |
| } |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_storder */ |
| /* Returns: Nil */ |
| /* Parameters: way(I) - direction of byte order conversion. */ |
| /* ips(IO) - pointer to data to be converted. */ |
| /* */ |
| /* Do byte swapping on values in the IP state data structure that need to */ |
| /* be used at both ends by the host in their native byte order. */ |
| /* ------------------------------------------------------------------------ */ |
| void |
| ipf_sync_storder(way, ips) |
| int way; |
| ipstate_t *ips; |
| { |
| ipf_sync_tcporder(way, &ips->is_tcp.ts_data[0]); |
| ipf_sync_tcporder(way, &ips->is_tcp.ts_data[1]); |
| |
| if (way) { |
| ips->is_hv = htonl(ips->is_hv); |
| ips->is_die = htonl(ips->is_die); |
| ips->is_pass = htonl(ips->is_pass); |
| ips->is_flags = htonl(ips->is_flags); |
| ips->is_opt[0] = htonl(ips->is_opt[0]); |
| ips->is_opt[1] = htonl(ips->is_opt[1]); |
| ips->is_optmsk[0] = htonl(ips->is_optmsk[0]); |
| ips->is_optmsk[1] = htonl(ips->is_optmsk[1]); |
| ips->is_sec = htons(ips->is_sec); |
| ips->is_secmsk = htons(ips->is_secmsk); |
| ips->is_auth = htons(ips->is_auth); |
| ips->is_authmsk = htons(ips->is_authmsk); |
| ips->is_s0[0] = htonl(ips->is_s0[0]); |
| ips->is_s0[1] = htonl(ips->is_s0[1]); |
| ips->is_smsk[0] = htons(ips->is_smsk[0]); |
| ips->is_smsk[1] = htons(ips->is_smsk[1]); |
| } else { |
| ips->is_hv = ntohl(ips->is_hv); |
| ips->is_die = ntohl(ips->is_die); |
| ips->is_pass = ntohl(ips->is_pass); |
| ips->is_flags = ntohl(ips->is_flags); |
| ips->is_opt[0] = ntohl(ips->is_opt[0]); |
| ips->is_opt[1] = ntohl(ips->is_opt[1]); |
| ips->is_optmsk[0] = ntohl(ips->is_optmsk[0]); |
| ips->is_optmsk[1] = ntohl(ips->is_optmsk[1]); |
| ips->is_sec = ntohs(ips->is_sec); |
| ips->is_secmsk = ntohs(ips->is_secmsk); |
| ips->is_auth = ntohs(ips->is_auth); |
| ips->is_authmsk = ntohs(ips->is_authmsk); |
| ips->is_s0[0] = ntohl(ips->is_s0[0]); |
| ips->is_s0[1] = ntohl(ips->is_s0[1]); |
| ips->is_smsk[0] = ntohl(ips->is_smsk[0]); |
| ips->is_smsk[1] = ntohl(ips->is_smsk[1]); |
| } |
| } |
| # else /* !defined(sparc) && !defined(__hppa) */ |
| # define ipf_sync_tcporder(x,y) |
| # define ipf_sync_natorder(x,y) |
| # define ipf_sync_storder(x,y) |
| # endif /* !defined(sparc) && !defined(__hppa) */ |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_write */ |
| /* Returns: int - 0 == success, else error value. */ |
| /* Parameters: uio(I) - pointer to information about data to write */ |
| /* */ |
| /* Moves data from user space into the kernel and uses it for updating data */ |
| /* structures in the state/NAT tables. */ |
| /* ------------------------------------------------------------------------ */ |
| int |
| ipf_sync_write(softc, uio) |
| ipf_main_softc_t *softc; |
| struct uio *uio; |
| { |
| ipf_sync_softc_t *softs = softc->ipf_sync_soft; |
| synchdr_t sh; |
| |
| /* |
| * THIS MUST BE SUFFICIENT LARGE TO STORE |
| * ANY POSSIBLE DATA TYPE |
| */ |
| char data[2048]; |
| |
| int err = 0; |
| |
| # if BSD_GE_YEAR(199306) || defined(__FreeBSD__) || defined(__osf__) |
| uio->uio_rw = UIO_WRITE; |
| # endif |
| |
| /* Try to get bytes */ |
| while (uio->uio_resid > 0) { |
| |
| if (uio->uio_resid >= sizeof(sh)) { |
| |
| err = UIOMOVE(&sh, sizeof(sh), UIO_WRITE, uio); |
| |
| if (err) { |
| if (softs->ipf_sync_debug > 2) |
| printf("uiomove(header) failed: %d\n", |
| err); |
| return err; |
| } |
| |
| /* convert to host order */ |
| sh.sm_magic = ntohl(sh.sm_magic); |
| sh.sm_len = ntohl(sh.sm_len); |
| sh.sm_num = ntohl(sh.sm_num); |
| |
| if (softs->ipf_sync_debug > 8) |
| printf("[%d] Read v:%d p:%d cmd:%d table:%d rev:%d len:%d magic:%x\n", |
| sh.sm_num, sh.sm_v, sh.sm_p, sh.sm_cmd, |
| sh.sm_table, sh.sm_rev, sh.sm_len, |
| sh.sm_magic); |
| |
| if (sh.sm_magic != SYNHDRMAGIC) { |
| if (softs->ipf_sync_debug > 2) |
| printf("uiomove(header) invalid %s\n", |
| "magic"); |
| softc->ipf_interror = 110001; |
| return EINVAL; |
| } |
| |
| if (sh.sm_v != 4 && sh.sm_v != 6) { |
| if (softs->ipf_sync_debug > 2) |
| printf("uiomove(header) invalid %s\n", |
| "protocol"); |
| softc->ipf_interror = 110002; |
| return EINVAL; |
| } |
| |
| if (sh.sm_cmd > SMC_MAXCMD) { |
| if (softs->ipf_sync_debug > 2) |
| printf("uiomove(header) invalid %s\n", |
| "command"); |
| softc->ipf_interror = 110003; |
| return EINVAL; |
| } |
| |
| |
| if (sh.sm_table > SMC_MAXTBL) { |
| if (softs->ipf_sync_debug > 2) |
| printf("uiomove(header) invalid %s\n", |
| "table"); |
| softc->ipf_interror = 110004; |
| return EINVAL; |
| } |
| |
| } else { |
| /* unsufficient data, wait until next call */ |
| if (softs->ipf_sync_debug > 2) |
| printf("uiomove(header) insufficient data"); |
| softc->ipf_interror = 110005; |
| return EAGAIN; |
| } |
| |
| |
| /* |
| * We have a header, so try to read the amount of data |
| * needed for the request |
| */ |
| |
| /* not supported */ |
| if (sh.sm_len == 0) { |
| if (softs->ipf_sync_debug > 2) |
| printf("uiomove(data zero length %s\n", |
| "not supported"); |
| softc->ipf_interror = 110006; |
| return EINVAL; |
| } |
| |
| if (uio->uio_resid >= sh.sm_len) { |
| |
| err = UIOMOVE(data, sh.sm_len, UIO_WRITE, uio); |
| |
| if (err) { |
| if (softs->ipf_sync_debug > 2) |
| printf("uiomove(data) failed: %d\n", |
| err); |
| return err; |
| } |
| |
| if (softs->ipf_sync_debug > 7) |
| printf("uiomove(data) %d bytes read\n", |
| sh.sm_len); |
| |
| if (sh.sm_table == SMC_STATE) |
| err = ipf_sync_state(softc, &sh, data); |
| else if (sh.sm_table == SMC_NAT) |
| err = ipf_sync_nat(softc, &sh, data); |
| if (softs->ipf_sync_debug > 7) |
| printf("[%d] Finished with error %d\n", |
| sh.sm_num, err); |
| |
| } else { |
| /* insufficient data, wait until next call */ |
| if (softs->ipf_sync_debug > 2) |
| printf("uiomove(data) %s %d bytes, got %d\n", |
| "insufficient data, need", |
| sh.sm_len, uio->uio_resid); |
| softc->ipf_interror = 110007; |
| return EAGAIN; |
| } |
| } |
| |
| /* no more data */ |
| return 0; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_read */ |
| /* Returns: int - 0 == success, else error value. */ |
| /* Parameters: uio(O) - pointer to information about where to store data */ |
| /* */ |
| /* This function is called when a user program wants to read some data */ |
| /* for pending state/NAT updates. If no data is available, the caller is */ |
| /* put to sleep, pending a wakeup from the "lower half" of this code. */ |
| /* ------------------------------------------------------------------------ */ |
| int |
| ipf_sync_read(softc, uio) |
| ipf_main_softc_t *softc; |
| struct uio *uio; |
| { |
| ipf_sync_softc_t *softs = softc->ipf_sync_soft; |
| syncupdent_t *su; |
| synclogent_t *sl; |
| int err = 0; |
| |
| if ((uio->uio_resid & 3) || (uio->uio_resid < 8)) { |
| softc->ipf_interror = 110008; |
| return EINVAL; |
| } |
| |
| # if BSD_GE_YEAR(199306) || defined(__FreeBSD__) || defined(__osf__) |
| uio->uio_rw = UIO_READ; |
| # endif |
| |
| MUTEX_ENTER(&softs->ipsl_mutex); |
| while ((softs->sl_tail == softs->sl_idx) && |
| (softs->su_tail == softs->su_idx)) { |
| # if defined(_KERNEL) |
| # if SOLARIS |
| if (!cv_wait_sig(&softs->ipslwait, &softs->ipsl_mutex.ipf_lk)) { |
| MUTEX_EXIT(&softs->ipsl_mutex); |
| softc->ipf_interror = 110009; |
| return EINTR; |
| } |
| # else |
| # ifdef __hpux |
| { |
| lock_t *l; |
| |
| l = get_sleep_lock(&softs->sl_tail); |
| err = sleep(&softs->sl_tail, PZERO+1); |
| if (err) { |
| MUTEX_EXIT(&softs->ipsl_mutex); |
| softc->ipf_interror = 110010; |
| return EINTR; |
| } |
| spinunlock(l); |
| } |
| # else /* __hpux */ |
| # ifdef __osf__ |
| err = mpsleep(&softs->sl_tail, PSUSP|PCATCH, "ipl sleep", 0, |
| &softs->ipsl_mutex, MS_LOCK_SIMPLE); |
| if (err) { |
| softc->ipf_interror = 110011; |
| return EINTR; |
| } |
| # else |
| MUTEX_EXIT(&softs->ipsl_mutex); |
| err = SLEEP(&softs->sl_tail, "ipl sleep"); |
| if (err) { |
| softc->ipf_interror = 110012; |
| return EINTR; |
| } |
| MUTEX_ENTER(&softs->ipsl_mutex); |
| # endif /* __osf__ */ |
| # endif /* __hpux */ |
| # endif /* SOLARIS */ |
| # endif /* _KERNEL */ |
| } |
| |
| while ((softs->sl_tail < softs->sl_idx) && |
| (uio->uio_resid > sizeof(*sl))) { |
| sl = softs->synclog + softs->sl_tail++; |
| MUTEX_EXIT(&softs->ipsl_mutex); |
| err = UIOMOVE(sl, sizeof(*sl), UIO_READ, uio); |
| if (err != 0) |
| goto goterror; |
| MUTEX_ENTER(&softs->ipsl_mutex); |
| } |
| |
| while ((softs->su_tail < softs->su_idx) && |
| (uio->uio_resid > sizeof(*su))) { |
| su = softs->syncupd + softs->su_tail; |
| softs->su_tail++; |
| MUTEX_EXIT(&softs->ipsl_mutex); |
| err = UIOMOVE(su, sizeof(*su), UIO_READ, uio); |
| if (err != 0) |
| goto goterror; |
| MUTEX_ENTER(&softs->ipsl_mutex); |
| if (su->sup_hdr.sm_sl != NULL) |
| su->sup_hdr.sm_sl->sl_idx = -1; |
| } |
| if (softs->sl_tail == softs->sl_idx) |
| softs->sl_tail = softs->sl_idx = 0; |
| if (softs->su_tail == softs->su_idx) |
| softs->su_tail = softs->su_idx = 0; |
| MUTEX_EXIT(&softs->ipsl_mutex); |
| goterror: |
| return err; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_state */ |
| /* Returns: int - 0 == success, else error value. */ |
| /* Parameters: sp(I) - pointer to sync packet data header */ |
| /* uio(I) - pointer to user data for further information */ |
| /* */ |
| /* Updates the state table according to information passed in the sync */ |
| /* header. As required, more data is fetched from the uio structure but */ |
| /* varies depending on the contents of the sync header. This function can */ |
| /* create a new state entry or update one. Deletion is left to the state */ |
| /* structures being timed out correctly. */ |
| /* ------------------------------------------------------------------------ */ |
| static int |
| ipf_sync_state(softc, sp, data) |
| ipf_main_softc_t *softc; |
| synchdr_t *sp; |
| void *data; |
| { |
| ipf_sync_softc_t *softs = softc->ipf_sync_soft; |
| synctcp_update_t su; |
| ipstate_t *is, sn; |
| synclist_t *sl; |
| frentry_t *fr; |
| u_int hv; |
| int err = 0; |
| |
| hv = sp->sm_num & (softs->ipf_sync_state_tab_sz - 1); |
| |
| switch (sp->sm_cmd) |
| { |
| case SMC_CREATE : |
| |
| bcopy(data, &sn, sizeof(sn)); |
| KMALLOC(is, ipstate_t *); |
| if (is == NULL) { |
| softc->ipf_interror = 110013; |
| err = ENOMEM; |
| break; |
| } |
| |
| KMALLOC(sl, synclist_t *); |
| if (sl == NULL) { |
| softc->ipf_interror = 110014; |
| err = ENOMEM; |
| KFREE(is); |
| break; |
| } |
| |
| bzero((char *)is, offsetof(ipstate_t, is_die)); |
| bcopy((char *)&sn.is_die, (char *)&is->is_die, |
| sizeof(*is) - offsetof(ipstate_t, is_die)); |
| ipf_sync_storder(0, is); |
| |
| /* |
| * We need to find the same rule on the slave as was used on |
| * the master to create this state entry. |
| */ |
| READ_ENTER(&softc->ipf_mutex); |
| fr = ipf_getrulen(softc, IPL_LOGIPF, sn.is_group, sn.is_rulen); |
| if (fr != NULL) { |
| MUTEX_ENTER(&fr->fr_lock); |
| fr->fr_ref++; |
| fr->fr_statecnt++; |
| MUTEX_EXIT(&fr->fr_lock); |
| } |
| RWLOCK_EXIT(&softc->ipf_mutex); |
| |
| if (softs->ipf_sync_debug > 4) |
| printf("[%d] Filter rules = %p\n", sp->sm_num, fr); |
| |
| is->is_rule = fr; |
| is->is_sync = sl; |
| |
| sl->sl_idx = -1; |
| sl->sl_ips = is; |
| bcopy(sp, &sl->sl_hdr, sizeof(struct synchdr)); |
| |
| WRITE_ENTER(&softs->ipf_syncstate); |
| WRITE_ENTER(&softc->ipf_state); |
| |
| sl->sl_pnext = softs->syncstatetab + hv; |
| sl->sl_next = softs->syncstatetab[hv]; |
| if (softs->syncstatetab[hv] != NULL) |
| softs->syncstatetab[hv]->sl_pnext = &sl->sl_next; |
| softs->syncstatetab[hv] = sl; |
| MUTEX_DOWNGRADE(&softs->ipf_syncstate); |
| ipf_state_insert(softc, is, sp->sm_rev); |
| /* |
| * Do not initialise the interface pointers for the state |
| * entry as the full complement of interface names may not |
| * be present. |
| * |
| * Put this state entry on its timeout queue. |
| */ |
| /*fr_setstatequeue(is, sp->sm_rev);*/ |
| break; |
| |
| case SMC_UPDATE : |
| bcopy(data, &su, sizeof(su)); |
| |
| if (softs->ipf_sync_debug > 4) |
| printf("[%d] Update age %lu state %d/%d \n", |
| sp->sm_num, su.stu_age, su.stu_state[0], |
| su.stu_state[1]); |
| |
| READ_ENTER(&softs->ipf_syncstate); |
| for (sl = softs->syncstatetab[hv]; (sl != NULL); |
| sl = sl->sl_next) |
| if (sl->sl_hdr.sm_num == sp->sm_num) |
| break; |
| if (sl == NULL) { |
| if (softs->ipf_sync_debug > 1) |
| printf("[%d] State not found - can't update\n", |
| sp->sm_num); |
| RWLOCK_EXIT(&softs->ipf_syncstate); |
| softc->ipf_interror = 110015; |
| err = ENOENT; |
| break; |
| } |
| |
| READ_ENTER(&softc->ipf_state); |
| |
| if (softs->ipf_sync_debug > 6) |
| printf("[%d] Data from state v:%d p:%d cmd:%d table:%d rev:%d\n", |
| sp->sm_num, sl->sl_hdr.sm_v, sl->sl_hdr.sm_p, |
| sl->sl_hdr.sm_cmd, sl->sl_hdr.sm_table, |
| sl->sl_hdr.sm_rev); |
| |
| is = sl->sl_ips; |
| |
| MUTEX_ENTER(&is->is_lock); |
| switch (sp->sm_p) |
| { |
| case IPPROTO_TCP : |
| /* XXX FV --- shouldn't we do ntohl/htonl???? XXX */ |
| is->is_send = su.stu_data[0].td_end; |
| is->is_maxsend = su.stu_data[0].td_maxend; |
| is->is_maxswin = su.stu_data[0].td_maxwin; |
| is->is_state[0] = su.stu_state[0]; |
| is->is_dend = su.stu_data[1].td_end; |
| is->is_maxdend = su.stu_data[1].td_maxend; |
| is->is_maxdwin = su.stu_data[1].td_maxwin; |
| is->is_state[1] = su.stu_state[1]; |
| break; |
| default : |
| break; |
| } |
| |
| if (softs->ipf_sync_debug > 6) |
| printf("[%d] Setting timers for state\n", sp->sm_num); |
| |
| ipf_state_setqueue(softc, is, sp->sm_rev); |
| |
| MUTEX_EXIT(&is->is_lock); |
| break; |
| |
| default : |
| softc->ipf_interror = 110016; |
| err = EINVAL; |
| break; |
| } |
| |
| if (err == 0) { |
| RWLOCK_EXIT(&softc->ipf_state); |
| RWLOCK_EXIT(&softs->ipf_syncstate); |
| } |
| |
| if (softs->ipf_sync_debug > 6) |
| printf("[%d] Update completed with error %d\n", |
| sp->sm_num, err); |
| |
| return err; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_del */ |
| /* Returns: Nil */ |
| /* Parameters: sl(I) - pointer to synclist object to delete */ |
| /* */ |
| /* Deletes an object from the synclist. */ |
| /* ------------------------------------------------------------------------ */ |
| static void |
| ipf_sync_del(softs, sl) |
| ipf_sync_softc_t *softs; |
| synclist_t *sl; |
| { |
| *sl->sl_pnext = sl->sl_next; |
| if (sl->sl_next != NULL) |
| sl->sl_next->sl_pnext = sl->sl_pnext; |
| if (sl->sl_idx != -1) |
| softs->syncupd[sl->sl_idx].sup_hdr.sm_sl = NULL; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_del_state */ |
| /* Returns: Nil */ |
| /* Parameters: sl(I) - pointer to synclist object to delete */ |
| /* */ |
| /* Deletes an object from the synclist state table and free's its memory. */ |
| /* ------------------------------------------------------------------------ */ |
| void |
| ipf_sync_del_state(arg, sl) |
| void *arg; |
| synclist_t *sl; |
| { |
| ipf_sync_softc_t *softs = arg; |
| |
| WRITE_ENTER(&softs->ipf_syncstate); |
| ipf_sync_del(softs, sl); |
| RWLOCK_EXIT(&softs->ipf_syncstate); |
| KFREE(sl); |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_del_nat */ |
| /* Returns: Nil */ |
| /* Parameters: sl(I) - pointer to synclist object to delete */ |
| /* */ |
| /* Deletes an object from the synclist nat table and free's its memory. */ |
| /* ------------------------------------------------------------------------ */ |
| void |
| ipf_sync_del_nat(arg, sl) |
| void *arg; |
| synclist_t *sl; |
| { |
| ipf_sync_softc_t *softs = arg; |
| |
| WRITE_ENTER(&softs->ipf_syncnat); |
| ipf_sync_del(softs, sl); |
| RWLOCK_EXIT(&softs->ipf_syncnat); |
| KFREE(sl); |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_nat */ |
| /* Returns: int - 0 == success, else error value. */ |
| /* Parameters: sp(I) - pointer to sync packet data header */ |
| /* uio(I) - pointer to user data for further information */ |
| /* */ |
| /* Updates the NAT table according to information passed in the sync */ |
| /* header. As required, more data is fetched from the uio structure but */ |
| /* varies depending on the contents of the sync header. This function can */ |
| /* create a new NAT entry or update one. Deletion is left to the NAT */ |
| /* structures being timed out correctly. */ |
| /* ------------------------------------------------------------------------ */ |
| static int |
| ipf_sync_nat(softc, sp, data) |
| ipf_main_softc_t *softc; |
| synchdr_t *sp; |
| void *data; |
| { |
| ipf_sync_softc_t *softs = softc->ipf_sync_soft; |
| syncupdent_t su; |
| nat_t *n, *nat; |
| synclist_t *sl; |
| u_int hv = 0; |
| int err; |
| |
| READ_ENTER(&softs->ipf_syncnat); |
| |
| switch (sp->sm_cmd) |
| { |
| case SMC_CREATE : |
| KMALLOC(n, nat_t *); |
| if (n == NULL) { |
| softc->ipf_interror = 110017; |
| err = ENOMEM; |
| break; |
| } |
| |
| KMALLOC(sl, synclist_t *); |
| if (sl == NULL) { |
| softc->ipf_interror = 110018; |
| err = ENOMEM; |
| KFREE(n); |
| break; |
| } |
| |
| nat = (nat_t *)data; |
| bzero((char *)n, offsetof(nat_t, nat_age)); |
| bcopy((char *)&nat->nat_age, (char *)&n->nat_age, |
| sizeof(*n) - offsetof(nat_t, nat_age)); |
| ipf_sync_natorder(0, n); |
| n->nat_sync = sl; |
| n->nat_rev = sl->sl_rev; |
| |
| sl->sl_idx = -1; |
| sl->sl_ipn = n; |
| sl->sl_num = ntohl(sp->sm_num); |
| |
| WRITE_ENTER(&softc->ipf_nat); |
| sl->sl_pnext = softs->syncnattab + hv; |
| sl->sl_next = softs->syncnattab[hv]; |
| if (softs->syncnattab[hv] != NULL) |
| softs->syncnattab[hv]->sl_pnext = &sl->sl_next; |
| softs->syncnattab[hv] = sl; |
| (void) ipf_nat_insert(softc, softc->ipf_nat_soft, n); |
| RWLOCK_EXIT(&softc->ipf_nat); |
| break; |
| |
| case SMC_UPDATE : |
| bcopy(data, &su, sizeof(su)); |
| |
| for (sl = softs->syncnattab[hv]; (sl != NULL); |
| sl = sl->sl_next) |
| if (sl->sl_hdr.sm_num == sp->sm_num) |
| break; |
| if (sl == NULL) { |
| softc->ipf_interror = 110019; |
| err = ENOENT; |
| break; |
| } |
| |
| READ_ENTER(&softc->ipf_nat); |
| |
| nat = sl->sl_ipn; |
| nat->nat_rev = sl->sl_rev; |
| |
| MUTEX_ENTER(&nat->nat_lock); |
| ipf_nat_setqueue(softc, softc->ipf_nat_soft, nat); |
| MUTEX_EXIT(&nat->nat_lock); |
| |
| RWLOCK_EXIT(&softc->ipf_nat); |
| |
| break; |
| |
| default : |
| softc->ipf_interror = 110020; |
| err = EINVAL; |
| break; |
| } |
| |
| RWLOCK_EXIT(&softs->ipf_syncnat); |
| return 0; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_new */ |
| /* Returns: synclist_t* - NULL == failure, else pointer to new synclist */ |
| /* data structure. */ |
| /* Parameters: tab(I) - type of synclist_t to create */ |
| /* fin(I) - pointer to packet information */ |
| /* ptr(I) - pointer to owning object */ |
| /* */ |
| /* Creates a new sync table entry and notifies any sleepers that it's there */ |
| /* waiting to be processed. */ |
| /* ------------------------------------------------------------------------ */ |
| synclist_t * |
| ipf_sync_new(softc, tab, fin, ptr) |
| ipf_main_softc_t *softc; |
| int tab; |
| fr_info_t *fin; |
| void *ptr; |
| { |
| ipf_sync_softc_t *softs = softc->ipf_sync_soft; |
| synclist_t *sl, *ss; |
| synclogent_t *sle; |
| u_int hv, sz; |
| |
| if (softs->sl_idx == softs->ipf_sync_log_sz) |
| return NULL; |
| KMALLOC(sl, synclist_t *); |
| if (sl == NULL) |
| return NULL; |
| |
| MUTEX_ENTER(&softs->ipf_syncadd); |
| /* |
| * Get a unique number for this synclist_t. The number is only meant |
| * to be unique for the lifetime of the structure and may be reused |
| * later. |
| */ |
| softs->ipf_sync_num++; |
| if (softs->ipf_sync_num == 0) { |
| softs->ipf_sync_num = 1; |
| softs->ipf_sync_wrap++; |
| } |
| |
| /* |
| * Use the synch number of the object as the hash key. Should end up |
| * with relatively even distribution over time. |
| * XXX - an attacker could lunch an DoS attack, of sorts, if they are |
| * the only one causing new table entries by only keeping open every |
| * nth connection they make, where n is a value in the interval |
| * [0, SYNC_STATETABSZ-1]. |
| */ |
| switch (tab) |
| { |
| case SMC_STATE : |
| hv = softs->ipf_sync_num & (softs->ipf_sync_state_tab_sz - 1); |
| while (softs->ipf_sync_wrap != 0) { |
| for (ss = softs->syncstatetab[hv]; ss; ss = ss->sl_next) |
| if (ss->sl_hdr.sm_num == softs->ipf_sync_num) |
| break; |
| if (ss == NULL) |
| break; |
| softs->ipf_sync_num++; |
| hv = softs->ipf_sync_num & |
| (softs->ipf_sync_state_tab_sz - 1); |
| } |
| sl->sl_pnext = softs->syncstatetab + hv; |
| sl->sl_next = softs->syncstatetab[hv]; |
| softs->syncstatetab[hv] = sl; |
| break; |
| |
| case SMC_NAT : |
| hv = softs->ipf_sync_num & (softs->ipf_sync_nat_tab_sz - 1); |
| while (softs->ipf_sync_wrap != 0) { |
| for (ss = softs->syncnattab[hv]; ss; ss = ss->sl_next) |
| if (ss->sl_hdr.sm_num == softs->ipf_sync_num) |
| break; |
| if (ss == NULL) |
| break; |
| softs->ipf_sync_num++; |
| hv = softs->ipf_sync_num & |
| (softs->ipf_sync_nat_tab_sz - 1); |
| } |
| sl->sl_pnext = softs->syncnattab + hv; |
| sl->sl_next = softs->syncnattab[hv]; |
| softs->syncnattab[hv] = sl; |
| break; |
| |
| default : |
| break; |
| } |
| |
| sl->sl_num = softs->ipf_sync_num; |
| MUTEX_EXIT(&softs->ipf_syncadd); |
| |
| sl->sl_magic = htonl(SYNHDRMAGIC); |
| sl->sl_v = fin->fin_v; |
| sl->sl_p = fin->fin_p; |
| sl->sl_cmd = SMC_CREATE; |
| sl->sl_idx = -1; |
| sl->sl_table = tab; |
| sl->sl_rev = fin->fin_rev; |
| if (tab == SMC_STATE) { |
| sl->sl_ips = ptr; |
| sz = sizeof(*sl->sl_ips); |
| } else if (tab == SMC_NAT) { |
| sl->sl_ipn = ptr; |
| sz = sizeof(*sl->sl_ipn); |
| } else { |
| ptr = NULL; |
| sz = 0; |
| } |
| sl->sl_len = sz; |
| |
| /* |
| * Create the log entry to be read by a user daemon. When it has been |
| * finished and put on the queue, send a signal to wakeup any waiters. |
| */ |
| MUTEX_ENTER(&softs->ipf_syncadd); |
| sle = softs->synclog + softs->sl_idx++; |
| bcopy((char *)&sl->sl_hdr, (char *)&sle->sle_hdr, |
| sizeof(sle->sle_hdr)); |
| sle->sle_hdr.sm_num = htonl(sle->sle_hdr.sm_num); |
| sle->sle_hdr.sm_len = htonl(sle->sle_hdr.sm_len); |
| if (ptr != NULL) { |
| bcopy((char *)ptr, (char *)&sle->sle_un, sz); |
| if (tab == SMC_STATE) { |
| ipf_sync_storder(1, &sle->sle_un.sleu_ips); |
| } else if (tab == SMC_NAT) { |
| ipf_sync_natorder(1, &sle->sle_un.sleu_ipn); |
| } |
| } |
| MUTEX_EXIT(&softs->ipf_syncadd); |
| |
| ipf_sync_wakeup(softc); |
| return sl; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_update */ |
| /* Returns: Nil */ |
| /* Parameters: tab(I) - type of synclist_t to create */ |
| /* fin(I) - pointer to packet information */ |
| /* sl(I) - pointer to synchronisation object */ |
| /* */ |
| /* For outbound packets, only, create an sync update record for the user */ |
| /* process to read. */ |
| /* ------------------------------------------------------------------------ */ |
| void |
| ipf_sync_update(softc, tab, fin, sl) |
| ipf_main_softc_t *softc; |
| int tab; |
| fr_info_t *fin; |
| synclist_t *sl; |
| { |
| ipf_sync_softc_t *softs = softc->ipf_sync_soft; |
| synctcp_update_t *st; |
| syncupdent_t *slu; |
| ipstate_t *ips; |
| nat_t *nat; |
| ipfrwlock_t *lock; |
| |
| if (fin->fin_out == 0 || sl == NULL) |
| return; |
| |
| if (tab == SMC_STATE) { |
| lock = &softs->ipf_syncstate; |
| } else { |
| lock = &softs->ipf_syncnat; |
| } |
| |
| READ_ENTER(lock); |
| if (sl->sl_idx == -1) { |
| MUTEX_ENTER(&softs->ipf_syncadd); |
| slu = softs->syncupd + softs->su_idx; |
| sl->sl_idx = softs->su_idx++; |
| MUTEX_EXIT(&softs->ipf_syncadd); |
| |
| bcopy((char *)&sl->sl_hdr, (char *)&slu->sup_hdr, |
| sizeof(slu->sup_hdr)); |
| slu->sup_hdr.sm_magic = htonl(SYNHDRMAGIC); |
| slu->sup_hdr.sm_sl = sl; |
| slu->sup_hdr.sm_cmd = SMC_UPDATE; |
| slu->sup_hdr.sm_table = tab; |
| slu->sup_hdr.sm_num = htonl(sl->sl_num); |
| slu->sup_hdr.sm_len = htonl(sizeof(struct synctcp_update)); |
| slu->sup_hdr.sm_rev = fin->fin_rev; |
| # if 0 |
| if (fin->fin_p == IPPROTO_TCP) { |
| st->stu_len[0] = 0; |
| st->stu_len[1] = 0; |
| } |
| # endif |
| } else |
| slu = softs->syncupd + sl->sl_idx; |
| |
| /* |
| * Only TCP has complex timeouts, others just use default timeouts. |
| * For TCP, we only need to track the connection state and window. |
| */ |
| if (fin->fin_p == IPPROTO_TCP) { |
| st = &slu->sup_tcp; |
| if (tab == SMC_STATE) { |
| ips = sl->sl_ips; |
| st->stu_age = htonl(ips->is_die); |
| st->stu_data[0].td_end = ips->is_send; |
| st->stu_data[0].td_maxend = ips->is_maxsend; |
| st->stu_data[0].td_maxwin = ips->is_maxswin; |
| st->stu_state[0] = ips->is_state[0]; |
| st->stu_data[1].td_end = ips->is_dend; |
| st->stu_data[1].td_maxend = ips->is_maxdend; |
| st->stu_data[1].td_maxwin = ips->is_maxdwin; |
| st->stu_state[1] = ips->is_state[1]; |
| } else if (tab == SMC_NAT) { |
| nat = sl->sl_ipn; |
| st->stu_age = htonl(nat->nat_age); |
| } |
| } |
| RWLOCK_EXIT(lock); |
| |
| ipf_sync_wakeup(softc); |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_flush_table */ |
| /* Returns: int - number of entries freed by flushing table */ |
| /* Parameters: tabsize(I) - size of the array pointed to by table */ |
| /* table(I) - pointer to sync table to empty */ |
| /* */ |
| /* Walk through a table of sync entries and free each one. It is assumed */ |
| /* that some lock is held so that nobody else tries to access the table */ |
| /* during this cleanup. */ |
| /* ------------------------------------------------------------------------ */ |
| static int |
| ipf_sync_flush_table(softs, tabsize, table) |
| ipf_sync_softc_t *softs; |
| int tabsize; |
| synclist_t **table; |
| { |
| synclist_t *sl; |
| int i, items; |
| |
| items = 0; |
| |
| for (i = 0; i < tabsize; i++) { |
| while ((sl = table[i]) != NULL) { |
| switch (sl->sl_table) { |
| case SMC_STATE : |
| if (sl->sl_ips != NULL) |
| sl->sl_ips->is_sync = NULL; |
| break; |
| case SMC_NAT : |
| if (sl->sl_ipn != NULL) |
| sl->sl_ipn->nat_sync = NULL; |
| break; |
| } |
| if (sl->sl_next != NULL) |
| sl->sl_next->sl_pnext = sl->sl_pnext; |
| table[i] = sl->sl_next; |
| if (sl->sl_idx != -1) |
| softs->syncupd[sl->sl_idx].sup_hdr.sm_sl = NULL; |
| KFREE(sl); |
| items++; |
| } |
| } |
| |
| return items; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_ioctl */ |
| /* Returns: int - 0 == success, != 0 == failure */ |
| /* Parameters: data(I) - pointer to ioctl data */ |
| /* cmd(I) - ioctl command integer */ |
| /* mode(I) - file mode bits used with open */ |
| /* */ |
| /* This function currently does not handle any ioctls and so just returns */ |
| /* EINVAL on all occasions. */ |
| /* ------------------------------------------------------------------------ */ |
| int |
| ipf_sync_ioctl(softc, data, cmd, mode, uid, ctx) |
| ipf_main_softc_t *softc; |
| caddr_t data; |
| ioctlcmd_t cmd; |
| int mode, uid; |
| void *ctx; |
| { |
| ipf_sync_softc_t *softs = softc->ipf_sync_soft; |
| int error, i; |
| SPL_INT(s); |
| |
| switch (cmd) |
| { |
| case SIOCIPFFL: |
| error = BCOPYIN(data, &i, sizeof(i)); |
| if (error != 0) { |
| softc->ipf_interror = 110023; |
| error = EFAULT; |
| break; |
| } |
| |
| switch (i) |
| { |
| case SMC_RLOG : |
| SPL_NET(s); |
| MUTEX_ENTER(&softs->ipsl_mutex); |
| i = (softs->sl_tail - softs->sl_idx) + |
| (softs->su_tail - softs->su_idx); |
| softs->sl_idx = 0; |
| softs->su_idx = 0; |
| softs->sl_tail = 0; |
| softs->su_tail = 0; |
| MUTEX_EXIT(&softs->ipsl_mutex); |
| SPL_X(s); |
| break; |
| |
| case SMC_NAT : |
| SPL_NET(s); |
| WRITE_ENTER(&softs->ipf_syncnat); |
| i = ipf_sync_flush_table(softs, SYNC_NATTABSZ, |
| softs->syncnattab); |
| RWLOCK_EXIT(&softs->ipf_syncnat); |
| SPL_X(s); |
| break; |
| |
| case SMC_STATE : |
| SPL_NET(s); |
| WRITE_ENTER(&softs->ipf_syncstate); |
| i = ipf_sync_flush_table(softs, SYNC_STATETABSZ, |
| softs->syncstatetab); |
| RWLOCK_EXIT(&softs->ipf_syncstate); |
| SPL_X(s); |
| break; |
| } |
| |
| error = BCOPYOUT(&i, data, sizeof(i)); |
| if (error != 0) { |
| softc->ipf_interror = 110022; |
| error = EFAULT; |
| } |
| break; |
| |
| default : |
| softc->ipf_interror = 110021; |
| error = EINVAL; |
| break; |
| } |
| |
| return error; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_canread */ |
| /* Returns: int - 0 == success, != 0 == failure */ |
| /* Parameters: Nil */ |
| /* */ |
| /* This function provides input to the poll handler about whether or not */ |
| /* there is data waiting to be read from the /dev/ipsync device. */ |
| /* ------------------------------------------------------------------------ */ |
| int |
| ipf_sync_canread(arg) |
| void *arg; |
| { |
| ipf_sync_softc_t *softs = arg; |
| return !((softs->sl_tail == softs->sl_idx) && |
| (softs->su_tail == softs->su_idx)); |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_canwrite */ |
| /* Returns: int - 1 == can always write */ |
| /* Parameters: Nil */ |
| /* */ |
| /* This function lets the poll handler know that it is always ready willing */ |
| /* to accept write events. */ |
| /* XXX Maybe this should return false if the sync table is full? */ |
| /* ------------------------------------------------------------------------ */ |
| int |
| ipf_sync_canwrite(arg) |
| void *arg; |
| { |
| return 1; |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_wakeup */ |
| /* Parameters: Nil */ |
| /* Returns: Nil */ |
| /* */ |
| /* This function implements the heuristics that decide how often to */ |
| /* generate a poll wakeup for programs that are waiting for information */ |
| /* about when they can do a read on /dev/ipsync. */ |
| /* */ |
| /* There are three different considerations here: */ |
| /* - do not keep a program waiting too long: ipf_sync_wake_interval is the */ |
| /* maximum number of ipf ticks to let pass by; */ |
| /* - do not let the queue of ouststanding things to generate notifies for */ |
| /* get too full (ipf_sync_queue_high_wm is the high water mark); */ |
| /* - do not let too many events get collapsed in before deciding that the */ |
| /* other host(s) need an update (ipf_sync_event_high_wm is the high water */ |
| /* mark for this counter.) */ |
| /* ------------------------------------------------------------------------ */ |
| static void |
| ipf_sync_wakeup(softc) |
| ipf_main_softc_t *softc; |
| { |
| ipf_sync_softc_t *softs = softc->ipf_sync_soft; |
| |
| softs->ipf_sync_events++; |
| if ((softc->ipf_ticks > |
| softs->ipf_sync_lastwakeup + softs->ipf_sync_wake_interval) || |
| (softs->ipf_sync_events > softs->ipf_sync_event_high_wm) || |
| ((softs->sl_tail - softs->sl_idx) > |
| softs->ipf_sync_queue_high_wm) || |
| ((softs->su_tail - softs->su_idx) > |
| softs->ipf_sync_queue_high_wm)) { |
| |
| ipf_sync_poll_wakeup(softc); |
| } |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_poll_wakeup */ |
| /* Parameters: Nil */ |
| /* Returns: Nil */ |
| /* */ |
| /* Deliver a poll wakeup and reset counters for two of the three heuristics */ |
| /* ------------------------------------------------------------------------ */ |
| static void |
| ipf_sync_poll_wakeup(softc) |
| ipf_main_softc_t *softc; |
| { |
| ipf_sync_softc_t *softs = softc->ipf_sync_soft; |
| |
| softs->ipf_sync_events = 0; |
| softs->ipf_sync_lastwakeup = softc->ipf_ticks; |
| |
| # ifdef _KERNEL |
| # if SOLARIS |
| MUTEX_ENTER(&softs->ipsl_mutex); |
| cv_signal(&softs->ipslwait); |
| MUTEX_EXIT(&softs->ipsl_mutex); |
| pollwakeup(&softc->ipf_poll_head[IPL_LOGSYNC], POLLIN|POLLRDNORM); |
| # else |
| WAKEUP(&softs->sl_tail, 0); |
| POLLWAKEUP(IPL_LOGSYNC); |
| # endif |
| # endif |
| } |
| |
| |
| /* ------------------------------------------------------------------------ */ |
| /* Function: ipf_sync_expire */ |
| /* Parameters: Nil */ |
| /* Returns: Nil */ |
| /* */ |
| /* This is the function called even ipf_tick. It implements one of the */ |
| /* three heuristics above *IF* there are events waiting. */ |
| /* ------------------------------------------------------------------------ */ |
| void |
| ipf_sync_expire(softc) |
| ipf_main_softc_t *softc; |
| { |
| ipf_sync_softc_t *softs = softc->ipf_sync_soft; |
| |
| if ((softs->ipf_sync_events > 0) && |
| (softc->ipf_ticks > |
| softs->ipf_sync_lastwakeup + softs->ipf_sync_wake_interval)) { |
| ipf_sync_poll_wakeup(softc); |
| } |
| } |