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author | Simo Sorce <simo@metason.pico.li.ssimo.org> | 2009-10-26 15:12:45 -0400 |
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committer | Stephen Gallagher <sgallagh@redhat.com> | 2009-10-26 15:54:23 -0400 |
commit | 42ed4b35067a9588d26fdba8360b8d04672696e2 (patch) | |
tree | ee09091873a2d56de759030f974f252d653ccea2 /server/responder/pam/pamsrv_cmd.c | |
parent | e83a84cdce6f5722c027923f6776ae606c3ca6e9 (diff) | |
download | sssd-42ed4b35067a9588d26fdba8360b8d04672696e2.tar.gz sssd-42ed4b35067a9588d26fdba8360b8d04672696e2.tar.bz2 sssd-42ed4b35067a9588d26fdba8360b8d04672696e2.zip |
Use standard coding practice to set last login
This rewrite should also fix a segfault in the code that may happen when
exiting in case of error conditions. The previous code was attaching the
transaction handle to llreq structure and then calling prepare_reply() from
within the request handlers which could ultimately free the preq and
llreq and handle before the transaction request was actually completed
by tevent.
Diffstat (limited to 'server/responder/pam/pamsrv_cmd.c')
-rw-r--r-- | server/responder/pam/pamsrv_cmd.c | 218 |
1 files changed, 128 insertions, 90 deletions
diff --git a/server/responder/pam/pamsrv_cmd.c b/server/responder/pam/pamsrv_cmd.c index f05709ff..dfe67cdf 100644 --- a/server/responder/pam/pamsrv_cmd.c +++ b/server/responder/pam/pamsrv_cmd.c @@ -30,18 +30,6 @@ #include "responder/pam/pamsrv.h" #include "db/sysdb.h" -struct last_login_request { - struct tevent_context *ev; - struct sysdb_ctx *dbctx; - struct sysdb_attrs *mod_attrs; - struct sysdb_handle *handle; - - struct ldb_result *res; - int error; - - struct pam_auth_req *preq; -}; - static void pam_reply(struct pam_auth_req *preq); static int extract_authtok(uint32_t *type, uint32_t *size, uint8_t **tok, uint8_t *body, size_t blen, size_t *c) { @@ -280,146 +268,196 @@ static int pam_parse_in_data(struct sss_names_ctx *snctx, return EOK; } -static void prepare_reply(struct last_login_request *llreq) -{ - struct pam_data *pd; +/*=Save-Last-Login-State===================================================*/ - pd = llreq->preq->pd; +struct set_last_login_state { + struct tevent_context *ev; + struct sysdb_ctx *dbctx; - if (llreq->error != EOK && pd->pam_status == PAM_SUCCESS) - pd->pam_status = PAM_SYSTEM_ERR; + struct sss_domain_info *dom; + const char *username; + struct sysdb_attrs *attrs; - llreq->preq->callback(llreq->preq); -} + struct sysdb_handle *handle; + + struct ldb_result *res; +}; + +static void set_last_login_trans_done(struct tevent_req *subreq); +static void set_last_login_attrs_done(struct tevent_req *subreq); +static void set_last_login_done(struct tevent_req *subreq); -static void set_user_last_login_done(struct tevent_req *req) +static struct tevent_req *set_last_login_send(TALLOC_CTX *memctx, + struct tevent_context *ev, + struct sysdb_ctx *dbctx, + struct sss_domain_info *dom, + const char *username, + struct sysdb_attrs *attrs) { - struct last_login_request *llreq = - tevent_req_callback_data(req, - struct last_login_request); - int ret; + struct tevent_req *req, *subreq; + struct set_last_login_state *state; - ret = sysdb_transaction_commit_recv(req); - if(ret != EOK) { - DEBUG(2, ("set_last_login failed.\n")); - llreq->error = ret; + req = tevent_req_create(memctx, &state, struct set_last_login_state); + if (!req) { + return NULL; } - llreq->preq->pd->last_auth_saved = true; + state->ev = ev; + state->dbctx = dbctx; + state->dom = dom; + state->username = username; + state->attrs = attrs; + state->handle = NULL; + + subreq = sysdb_transaction_send(state, state->ev, state->dbctx); + if (!subreq) { + talloc_free(req); + return NULL; + } + tevent_req_set_callback(subreq, set_last_login_trans_done, req); - prepare_reply(llreq); + return req; } -static void set_user_last_login_req_done(struct tevent_req *subreq); -static void set_user_last_login_req(struct tevent_req *req) +static void set_last_login_trans_done(struct tevent_req *subreq) { - struct last_login_request *llreq = - tevent_req_callback_data(req, - struct last_login_request); - struct tevent_req *subreq; + struct tevent_req *req = tevent_req_callback_data(subreq, + struct tevent_req); + struct set_last_login_state *state = tevent_req_data(req, + struct set_last_login_state); int ret; - ret = sysdb_transaction_recv(req, llreq, &llreq->handle); + ret = sysdb_transaction_recv(subreq, state, &state->handle); + talloc_zfree(subreq); if (ret != EOK) { - llreq->error = ret; - return prepare_reply(llreq); + DEBUG(1, ("Unable to acquire sysdb transaction lock\n")); + tevent_req_error(req, ret); + return; } - subreq = sysdb_set_user_attr_send(llreq, llreq->ev, llreq->handle, - llreq->preq->domain, - llreq->preq->pd->user, - llreq->mod_attrs, SYSDB_MOD_REP); + subreq = sysdb_set_user_attr_send(state, state->ev, state->handle, + state->dom, state->username, + state->attrs, SYSDB_MOD_REP); if (!subreq) { - /* Cancel transaction */ - talloc_zfree(llreq->handle); - llreq->error = EIO; - return prepare_reply(llreq); + tevent_req_error(req, ENOMEM); + return; } - tevent_req_set_callback(subreq, set_user_last_login_req_done, llreq); + tevent_req_set_callback(subreq, set_last_login_attrs_done, req); } -static void set_user_last_login_req_done(struct tevent_req *subreq) +static void set_last_login_attrs_done(struct tevent_req *subreq) { - struct last_login_request *llreq = - tevent_req_callback_data(subreq, - struct last_login_request); - struct tevent_req *req; + struct tevent_req *req = tevent_req_callback_data(subreq, + struct tevent_req); + struct set_last_login_state *state = tevent_req_data(req, + struct set_last_login_state); int ret; ret = sysdb_set_user_attr_recv(subreq); talloc_zfree(subreq); + if (ret != EOK) { + DEBUG(4, ("set_user_attr_callback, status [%d][%s]\n", + ret, strerror(ret))); + tevent_req_error(req, ret); + return; + } - DEBUG(4, ("set_user_attr_callback, status [%d][%s]\n", ret, strerror(ret))); - - if (ret) { - llreq->error = ret; - goto fail; + subreq = sysdb_transaction_commit_send(state, state->ev, state->handle); + if (!subreq) { + tevent_req_error(req, ENOMEM); + return; } + tevent_req_set_callback(subreq, set_last_login_done, req); +} - req = sysdb_transaction_commit_send(llreq, llreq->ev, llreq->handle); - if (!req) { - llreq->error = ENOMEM; - goto fail; +static void set_last_login_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data(subreq, + struct tevent_req); + int ret; + + ret = sysdb_transaction_commit_recv(req); + if (ret != EOK) { + DEBUG(2, ("set_last_login failed.\n")); + tevent_req_error(req, ret); + return; } - tevent_req_set_callback(req, set_user_last_login_done, llreq); -fail: - DEBUG(2, ("set_last_login failed.\n")); + tevent_req_done(req); +} - /* cancel transaction */ - talloc_zfree(llreq->handle); +static int set_last_login_recv(struct tevent_req *req) +{ + enum tevent_req_state tstate; + uint64_t err = 0; + + if (tevent_req_is_error(req, &tstate, &err)) { + return err; + } - prepare_reply(llreq); + return EOK; } +/*=========================================================================*/ + + +static void set_last_login_reply(struct tevent_req *req); + static errno_t set_last_login(struct pam_auth_req *preq) { - struct last_login_request *llreq; struct tevent_req *req; + struct sysdb_ctx *dbctx; + struct sysdb_attrs *attrs; errno_t ret; - llreq = talloc_zero(preq, struct last_login_request); - if (!llreq) { - ret = ENOMEM; - goto fail; - } - llreq->ev = preq->cctx->ev; - llreq->preq = preq; - - llreq->mod_attrs = sysdb_new_attrs(llreq); - if (!llreq->mod_attrs) { + attrs = sysdb_new_attrs(preq); + if (!attrs) { ret = ENOMEM; goto fail; } - ret = sysdb_attrs_add_long(llreq->mod_attrs, SYSDB_LAST_ONLINE_AUTH, - (long)time(NULL)); + ret = sysdb_attrs_add_time_t(attrs, SYSDB_LAST_ONLINE_AUTH, time(NULL)); if (ret != EOK) { goto fail; } - ret = sysdb_get_ctx_from_list(preq->cctx->rctx->db_list, - preq->domain, &llreq->dbctx); + ret = sysdb_get_ctx_from_list(preq->cctx->rctx->db_list, preq->domain, + &dbctx); if (ret != EOK) { - DEBUG(0, ("Fatal: Sysdb CTX not found for this domain!\n")); + DEBUG(0, ("Fatal: Sysdb context not found for this domain!\n")); goto fail; } - req = sysdb_transaction_send(llreq, llreq->ev, llreq->dbctx); + req = set_last_login_send(preq, preq->cctx->ev, dbctx, + preq->domain, preq->pd->user, attrs); if (!req) { - DEBUG(1, ("Unable to acquire sysdb transaction lock\n")); - ret = EIO; + ret = ENOMEM; goto fail; } + tevent_req_set_callback(req, set_last_login_reply, preq); - tevent_req_set_callback(req, set_user_last_login_req, llreq); return EOK; fail: - talloc_free(llreq); return ret; } +static void set_last_login_reply(struct tevent_req *req) +{ + struct pam_auth_req *preq = tevent_req_callback_data(req, + struct pam_auth_req); + int ret; + + ret = set_last_login_recv(req); + if (ret != EOK) { + preq->pd->pam_status = PAM_SYSTEM_ERR; + } else { + preq->pd->last_auth_saved = true; + } + + preq->callback(preq); +} + static void pam_reply_delay(struct tevent_context *ev, struct tevent_timer *te, struct timeval tv, void *pvt) { |