mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-23 02:32:16 +01:00
- fix (global) address handling in the presence of duplicates, the
last interface should own the address, but the current code fumbles the handoff. This fixes that. - move address related debugs to PCB4 and add additional ones to help in debugging address problems. Approved by: re@freebsd.org (K Smith)
This commit is contained in:
Randall Stewart
parent
84a0b303a9
commit
baf3da661c
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=172266
@ -751,7 +751,7 @@ __FBSDID("$FreeBSD$");
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#define SCTP_DEBUG_PCB1 0x00100000
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#define SCTP_DEBUG_PCB2 0x00200000 /* unused */
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#define SCTP_DEBUG_PCB3 0x00400000
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#define SCTP_DEBUG_PCB4 0x00800000 /* unused */
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#define SCTP_DEBUG_PCB4 0x00800000
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#define SCTP_DEBUG_INDATA1 0x01000000
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#define SCTP_DEBUG_INDATA2 0x02000000 /* unused */
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#define SCTP_DEBUG_INDATA3 0x04000000 /* unused */
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@ -297,7 +297,8 @@ sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
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}
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void
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sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, const char *if_name, uint32_t ifn_index)
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sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
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const char *if_name, uint32_t ifn_index)
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{
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struct sctp_vrf *vrf;
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struct sctp_ifa *sctp_ifap = NULL;
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@ -305,17 +306,17 @@ sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, const char *if_n
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SCTP_IPI_ADDR_RLOCK();
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vrf = sctp_find_vrf(vrf_id);
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if (vrf == NULL) {
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SCTPDBG(SCTP_DEBUG_PCB1, "Can't find vrf_id:%d\n", vrf_id);
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SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
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goto out;
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}
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sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
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if (sctp_ifap == NULL) {
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SCTPDBG(SCTP_DEBUG_PCB1, "Can't find sctp_ifap for address\n");
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SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
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goto out;
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}
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if (sctp_ifap->ifn_p == NULL) {
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SCTPDBG(SCTP_DEBUG_PCB1, "IFA has no IFN - can't mark unuseable\n");
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SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
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goto out;
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}
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if (if_name) {
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@ -324,19 +325,19 @@ sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, const char *if_n
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len1 = strlen(if_name);
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len2 = strlen(sctp_ifap->ifn_p->ifn_name);
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if (len1 != len2) {
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SCTPDBG(SCTP_DEBUG_PCB1, "IFN of ifa names different lenght %d vs %d - ignored\n",
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SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
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len1, len2);
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goto out;
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}
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if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
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SCTPDBG(SCTP_DEBUG_PCB1, "IFN %s of IFA not the same as %s\n",
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SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
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sctp_ifap->ifn_p->ifn_name,
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if_name);
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goto out;
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}
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} else {
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if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
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SCTPDBG(SCTP_DEBUG_PCB1, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
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SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
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sctp_ifap->ifn_p->ifn_index, ifn_index);
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goto out;
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}
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@ -349,7 +350,8 @@ out:
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}
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void
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sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, const char *if_name, uint32_t ifn_index)
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sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
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const char *if_name, uint32_t ifn_index)
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{
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struct sctp_vrf *vrf;
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struct sctp_ifa *sctp_ifap = NULL;
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@ -357,17 +359,17 @@ sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, const char *if_nam
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SCTP_IPI_ADDR_RLOCK();
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vrf = sctp_find_vrf(vrf_id);
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if (vrf == NULL) {
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SCTPDBG(SCTP_DEBUG_PCB1, "Can't find vrf_id:%d\n", vrf_id);
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SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
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goto out;
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}
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sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
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if (sctp_ifap == NULL) {
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SCTPDBG(SCTP_DEBUG_PCB1, "Can't find sctp_ifap for address\n");
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SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
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goto out;
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}
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if (sctp_ifap->ifn_p == NULL) {
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SCTPDBG(SCTP_DEBUG_PCB1, "IFA has no IFN - can't mark unuseable\n");
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SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
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goto out;
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}
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if (if_name) {
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@ -376,19 +378,19 @@ sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, const char *if_nam
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len1 = strlen(if_name);
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len2 = strlen(sctp_ifap->ifn_p->ifn_name);
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if (len1 != len2) {
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SCTPDBG(SCTP_DEBUG_PCB1, "IFN of ifa names different lenght %d vs %d - ignored\n",
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SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n",
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len1, len2);
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goto out;
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}
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if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) {
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SCTPDBG(SCTP_DEBUG_PCB1, "IFN %s of IFA not the same as %s\n",
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SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
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sctp_ifap->ifn_p->ifn_name,
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if_name);
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goto out;
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}
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} else {
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if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
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SCTPDBG(SCTP_DEBUG_PCB1, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
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SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
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sctp_ifap->ifn_p->ifn_index, ifn_index);
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goto out;
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}
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@ -400,11 +402,81 @@ out:
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SCTP_IPI_ADDR_RUNLOCK();
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}
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/*-
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* Add an ifa to an ifn.
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* Register the interface as necessary.
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* NOTE: ADDR write lock MUST be held.
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*/
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static void
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sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
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{
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int ifa_af;
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LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
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sctp_ifap->ifn_p = sctp_ifnp;
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atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
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/* update address counts */
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sctp_ifnp->ifa_count++;
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ifa_af = sctp_ifap->address.sa.sa_family;
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if (ifa_af == AF_INET)
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sctp_ifnp->num_v4++;
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else
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sctp_ifnp->num_v6++;
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if (sctp_ifnp->ifa_count == 1) {
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/* register the new interface */
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SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
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sctp_ifnp->registered_af = ifa_af;
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}
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}
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/*-
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* Remove an ifa from its ifn.
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* If no more addresses exist, remove the ifn too. Otherwise, re-register
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* the interface based on the remaining address families left.
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* NOTE: ADDR write lock MUST be held.
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*/
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static void
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sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
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{
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uint32_t ifn_index;
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LIST_REMOVE(sctp_ifap, next_ifa);
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if (sctp_ifap->ifn_p) {
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/* update address counts */
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sctp_ifap->ifn_p->ifa_count--;
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if (sctp_ifap->address.sa.sa_family == AF_INET6)
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sctp_ifap->ifn_p->num_v6--;
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else if (sctp_ifap->address.sa.sa_family == AF_INET)
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sctp_ifap->ifn_p->num_v4--;
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ifn_index = sctp_ifap->ifn_p->ifn_index;
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if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
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/* remove the ifn, possibly freeing it */
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sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
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} else {
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/* re-register address family type, if needed */
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if ((sctp_ifap->ifn_p->num_v6 == 0) &&
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(sctp_ifap->ifn_p->registered_af == AF_INET6)) {
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SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6);
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SCTP_REGISTER_INTERFACE(ifn_index, AF_INET);
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sctp_ifap->ifn_p->registered_af = AF_INET;
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} else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
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(sctp_ifap->ifn_p->registered_af == AF_INET)) {
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SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET);
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SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6);
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sctp_ifap->ifn_p->registered_af = AF_INET6;
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}
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/* free the ifn refcount */
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sctp_free_ifn(sctp_ifap->ifn_p);
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}
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sctp_ifap->ifn_p = NULL;
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}
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}
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struct sctp_ifa *
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sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
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uint32_t ifn_type, const char *if_name,
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void *ifa, struct sockaddr *addr, uint32_t ifa_flags,
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uint32_t ifn_type, const char *if_name, void *ifa,
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struct sockaddr *addr, uint32_t ifa_flags,
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int dynamic_add)
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{
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struct sctp_vrf *vrf;
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@ -415,7 +487,10 @@ sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
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uint32_t hash_of_addr;
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int new_ifn_af = 0;
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/* How granular do we need the locks to be here? */
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#ifdef SCTP_DEBUG
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SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
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SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
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#endif
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SCTP_IPI_ADDR_WLOCK();
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sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
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if (sctp_ifnp) {
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@ -436,7 +511,8 @@ sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
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* done though.
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*/
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SCTP_IPI_ADDR_WUNLOCK();
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SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, sizeof(struct sctp_ifn), SCTP_M_IFN);
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SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
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sizeof(struct sctp_ifn), SCTP_M_IFN);
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if (sctp_ifnp == NULL) {
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#ifdef INVARIANTS
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panic("No memory for IFN:%u", sctp_ifnp->ifn_index);
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@ -470,44 +546,44 @@ sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
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/* Hmm, it already exists? */
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if ((sctp_ifap->ifn_p) &&
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(sctp_ifap->ifn_p->ifn_index == ifn_index)) {
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SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
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sctp_ifap->ifn_p->ifn_name, ifn_index,
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sctp_ifap);
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if (new_ifn_af) {
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/* Remove the created one that we don't want */
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sctp_delete_ifn(sctp_ifnp, 1);
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sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
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}
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if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
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/* easy to solve, just switch back to active */
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SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
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sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
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sctp_ifap->ifn_p = sctp_ifnp;
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atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
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exit_stage_left:
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SCTP_IPI_ADDR_WUNLOCK();
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return (sctp_ifap);
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} else {
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goto exit_stage_left;
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}
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exit_stage_left:
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SCTP_IPI_ADDR_WUNLOCK();
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return (sctp_ifap);
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} else {
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if (sctp_ifap->ifn_p) {
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/*
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* The last IFN gets the address, old ones
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* are deleted.
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* The last IFN gets the address, removee
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* the old one
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*/
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if (new_ifn_af) {
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/*
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* Remove the created one that we
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* don't want
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*/
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sctp_free_ifn(sctp_ifap->ifn_p);
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if (sctp_ifap->ifn_p->refcount == 1)
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sctp_delete_ifn(sctp_ifap->ifn_p, 1);
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sctp_ifap->ifn_p = sctp_ifnp;
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atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
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}
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SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
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sctp_ifap, sctp_ifap->ifn_p->ifn_name,
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sctp_ifap->ifn_p->ifn_index, if_name,
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ifn_index);
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/* remove the address from the old ifn */
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sctp_remove_ifa_from_ifn(sctp_ifap);
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/* move the address over to the new ifn */
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sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
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goto exit_stage_left;
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} else {
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/* repair ifnp which was NULL ? */
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sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
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sctp_ifap->ifn_p = sctp_ifnp;
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atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
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SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
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sctp_ifnp, sctp_ifap);
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sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
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}
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goto exit_stage_left;
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}
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@ -594,9 +670,10 @@ sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
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* Gak, what can we do? We have lost an address
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* change can you say HOSED?
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*/
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SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n");
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SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
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/* Opps, must decrement the count */
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sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, if_name);
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sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
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if_name);
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return (NULL);
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}
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SCTP_INCR_LADDR_COUNT();
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@ -632,9 +709,13 @@ sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
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SCTP_IPI_ADDR_WLOCK();
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vrf = sctp_find_vrf(vrf_id);
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if (vrf == NULL) {
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SCTP_PRINTF("Can't find vrf_id:%d\n", vrf_id);
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SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
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goto out_now;
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}
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#ifdef SCTP_DEBUG
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SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
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SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
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#endif
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sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
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if (sctp_ifap) {
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/* Validate the delete */
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@ -669,55 +750,24 @@ sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
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}
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}
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if (!valid) {
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#ifdef SCTP_DEBUG
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SCTPDBG(SCTP_DEBUG_PCB1, "Deleting address:");
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SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
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SCTPDBG(SCTP_DEBUG_PCB1, "ifn:%d ifname:%s does not match addresses\n",
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SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
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ifn_index, ((if_name == NULL) ? "NULL" : if_name));
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SCTPDBG(SCTP_DEBUG_PCB1, "ifn:%d ifname:%s - ignoring delete\n",
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SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
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sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
|
||||
#endif
|
||||
SCTP_IPI_ADDR_WUNLOCK();
|
||||
return;
|
||||
}
|
||||
}
|
||||
SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap);
|
||||
sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
|
||||
sctp_ifap->localifa_flags |= SCTP_BEING_DELETED;
|
||||
vrf->total_ifa_count--;
|
||||
LIST_REMOVE(sctp_ifap, next_bucket);
|
||||
LIST_REMOVE(sctp_ifap, next_ifa);
|
||||
if (sctp_ifap->ifn_p) {
|
||||
sctp_ifap->ifn_p->ifa_count--;
|
||||
if (sctp_ifap->address.sa.sa_family == AF_INET6)
|
||||
sctp_ifap->ifn_p->num_v6--;
|
||||
else if (sctp_ifap->address.sa.sa_family == AF_INET)
|
||||
sctp_ifap->ifn_p->num_v4--;
|
||||
if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
|
||||
sctp_delete_ifn(sctp_ifap->ifn_p, 1);
|
||||
} else {
|
||||
if ((sctp_ifap->ifn_p->num_v6 == 0) &&
|
||||
(sctp_ifap->ifn_p->registered_af == AF_INET6)) {
|
||||
SCTP_DEREGISTER_INTERFACE(ifn_index,
|
||||
AF_INET6);
|
||||
SCTP_REGISTER_INTERFACE(ifn_index,
|
||||
AF_INET);
|
||||
sctp_ifap->ifn_p->registered_af = AF_INET;
|
||||
} else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
|
||||
(sctp_ifap->ifn_p->registered_af == AF_INET)) {
|
||||
SCTP_DEREGISTER_INTERFACE(ifn_index,
|
||||
AF_INET);
|
||||
SCTP_REGISTER_INTERFACE(ifn_index,
|
||||
AF_INET6);
|
||||
sctp_ifap->ifn_p->registered_af = AF_INET6;
|
||||
}
|
||||
}
|
||||
sctp_free_ifn(sctp_ifap->ifn_p);
|
||||
sctp_ifap->ifn_p = NULL;
|
||||
}
|
||||
sctp_remove_ifa_from_ifn(sctp_ifap);
|
||||
}
|
||||
#ifdef SCTP_DEBUG
|
||||
else {
|
||||
SCTPDBG(SCTP_DEBUG_PCB1, "Del Addr-ifn:%d Could not find address:",
|
||||
SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
|
||||
ifn_index);
|
||||
SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
|
||||
}
|
||||
@ -734,7 +784,7 @@ out_now:
|
||||
* Gak, what can we do? We have lost an address
|
||||
* change can you say HOSED?
|
||||
*/
|
||||
SCTPDBG(SCTP_DEBUG_PCB1, "Lost an address change?\n");
|
||||
SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
|
||||
|
||||
/* Oops, must decrement the count */
|
||||
sctp_free_ifa(sctp_ifap);
|
||||
@ -766,7 +816,7 @@ static struct sctp_tcb *
|
||||
sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
|
||||
struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
|
||||
{
|
||||
/**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */
|
||||
/**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
|
||||
/*
|
||||
* If we support the TCP model, then we must now dig through to see
|
||||
* if we can find our endpoint in the list of tcp ep's.
|
||||
|
||||
@ -4935,6 +4935,10 @@ sctp_sorecvmsg(struct socket *so,
|
||||
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
|
||||
return (EINVAL);
|
||||
}
|
||||
if (from && fromlen <= 0) {
|
||||
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
|
||||
return (EINVAL);
|
||||
}
|
||||
if (msg_flags) {
|
||||
in_flags = *msg_flags;
|
||||
if (in_flags & MSG_PEEK)
|
||||
@ -5362,12 +5366,12 @@ found_one:
|
||||
struct sockaddr *to;
|
||||
|
||||
#ifdef INET
|
||||
cp_len = min(fromlen, control->whoFrom->ro._l_addr.sin.sin_len);
|
||||
cp_len = min((size_t)fromlen, (size_t)control->whoFrom->ro._l_addr.sin.sin_len);
|
||||
memcpy(from, &control->whoFrom->ro._l_addr, cp_len);
|
||||
((struct sockaddr_in *)from)->sin_port = control->port_from;
|
||||
#else
|
||||
/* No AF_INET use AF_INET6 */
|
||||
cp_len = min(fromlen, control->whoFrom->ro._l_addr.sin6.sin6_len);
|
||||
cp_len = min((size_t)fromlen, (size_t)control->whoFrom->ro._l_addr.sin6.sin6_len);
|
||||
memcpy(from, &control->whoFrom->ro._l_addr, cp_len);
|
||||
((struct sockaddr_in6 *)from)->sin6_port = control->port_from;
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user