diff options
Diffstat (limited to 'src/libsystemd/sd-resolv.c')
| -rw-r--r-- | src/libsystemd/sd-resolv.c | 282 |
1 files changed, 141 insertions, 141 deletions
diff --git a/src/libsystemd/sd-resolv.c b/src/libsystemd/sd-resolv.c index a4e7cde0fb..aa97ef7699 100644 --- a/src/libsystemd/sd-resolv.c +++ b/src/libsystemd/sd-resolv.c @@ -84,7 +84,7 @@ struct sd_resolv { }; struct sd_resolv_query { - sd_resolv_t *asyncns; + sd_resolv_t *resolv; int done; unsigned id; query_type_t type; @@ -383,18 +383,18 @@ static int handle_request(int out_fd, const packet_t *packet, size_t length) { } static void* thread_worker(void *p) { - sd_resolv_t *asyncns = p; + sd_resolv_t *resolv = p; sigset_t fullset; /* No signals in this thread please */ sigfillset(&fullset); pthread_sigmask(SIG_BLOCK, &fullset, NULL); - while (!asyncns->dead) { + while (!resolv->dead) { packet_t buf[BUFSIZE/sizeof(packet_t) + 1]; ssize_t length; - length = recv(asyncns->fds[REQUEST_RECV_FD], buf, sizeof(buf), 0); + length = recv(resolv->fds[REQUEST_RECV_FD], buf, sizeof(buf), 0); if (length <= 0) { if (length < 0 && (errno == EAGAIN || errno == EINTR)) @@ -402,50 +402,50 @@ static void* thread_worker(void *p) { break; } - if (asyncns->dead) + if (resolv->dead) break; - if (handle_request(asyncns->fds[RESPONSE_SEND_FD], buf, (size_t) length) < 0) + if (handle_request(resolv->fds[RESPONSE_SEND_FD], buf, (size_t) length) < 0) break; } - send_died(asyncns->fds[RESPONSE_SEND_FD]); + send_died(resolv->fds[RESPONSE_SEND_FD]); return NULL; } sd_resolv_t* sd_resolv_new(unsigned n_proc) { int i; - sd_resolv_t *asyncns = NULL; + sd_resolv_t *resolv = NULL; assert(n_proc >= 1); if (n_proc > MAX_WORKERS) n_proc = MAX_WORKERS; - asyncns = malloc(sizeof(sd_resolv_t)); - if (!asyncns) { + resolv = malloc(sizeof(sd_resolv_t)); + if (!resolv) { errno = ENOMEM; goto fail; } - asyncns->dead = 0; - asyncns->valid_workers = 0; + resolv->dead = 0; + resolv->valid_workers = 0; for (i = 0; i < MESSAGE_FD_MAX; i++) - asyncns->fds[i] = -1; + resolv->fds[i] = -1; - memset(asyncns->queries, 0, sizeof(asyncns->queries)); + memset(resolv->queries, 0, sizeof(resolv->queries)); #ifdef SOCK_CLOEXEC - if (socketpair(PF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, asyncns->fds) < 0 || - socketpair(PF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, asyncns->fds+2) < 0) { + if (socketpair(PF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, resolv->fds) < 0 || + socketpair(PF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0, resolv->fds+2) < 0) { /* Try again, without SOCK_CLOEXEC */ if (errno == EINVAL) { #endif - if (socketpair(PF_UNIX, SOCK_DGRAM, 0, asyncns->fds) < 0 || - socketpair(PF_UNIX, SOCK_DGRAM, 0, asyncns->fds+2) < 0) + if (socketpair(PF_UNIX, SOCK_DGRAM, 0, resolv->fds) < 0 || + socketpair(PF_UNIX, SOCK_DGRAM, 0, resolv->fds+2) < 0) goto fail; #ifdef SOCK_CLOEXEC } else @@ -454,42 +454,42 @@ sd_resolv_t* sd_resolv_new(unsigned n_proc) { #endif for (i = 0; i < MESSAGE_FD_MAX; i++) - fd_cloexec(asyncns->fds[i], true); + fd_cloexec(resolv->fds[i], true); - for (asyncns->valid_workers = 0; asyncns->valid_workers < n_proc; asyncns->valid_workers++) { + for (resolv->valid_workers = 0; resolv->valid_workers < n_proc; resolv->valid_workers++) { int r; - r = pthread_create(&asyncns->workers[asyncns->valid_workers], NULL, thread_worker, asyncns); + r = pthread_create(&resolv->workers[resolv->valid_workers], NULL, thread_worker, resolv); if (r) { errno = r; goto fail; } } - asyncns->current_index = asyncns->current_id = 0; - asyncns->done_head = asyncns->done_tail = NULL; - asyncns->n_queries = 0; + resolv->current_index = resolv->current_id = 0; + resolv->done_head = resolv->done_tail = NULL; + resolv->n_queries = 0; - fd_nonblock(asyncns->fds[RESPONSE_RECV_FD], true); + fd_nonblock(resolv->fds[RESPONSE_RECV_FD], true); - return asyncns; + return resolv; fail: - if (asyncns) - sd_resolv_free(asyncns); + if (resolv) + sd_resolv_free(resolv); return NULL; } -void sd_resolv_free(sd_resolv_t *asyncns) { +void sd_resolv_free(sd_resolv_t *resolv) { int i; int saved_errno = errno; unsigned p; - assert(asyncns); + assert(resolv); - asyncns->dead = 1; + resolv->dead = 1; - if (asyncns->fds[REQUEST_SEND_FD] >= 0) { + if (resolv->fds[REQUEST_SEND_FD] >= 0) { rheader_t req = {}; req.type = REQUEST_TERMINATE; @@ -497,43 +497,43 @@ void sd_resolv_free(sd_resolv_t *asyncns) { req.id = 0; /* Send one termination packet for each worker */ - for (p = 0; p < asyncns->valid_workers; p++) - send(asyncns->fds[REQUEST_SEND_FD], &req, req.length, MSG_NOSIGNAL); + for (p = 0; p < resolv->valid_workers; p++) + send(resolv->fds[REQUEST_SEND_FD], &req, req.length, MSG_NOSIGNAL); } /* Now terminate them and wait until they are gone. */ - for (p = 0; p < asyncns->valid_workers; p++) { + for (p = 0; p < resolv->valid_workers; p++) { for (;;) { - if (pthread_join(asyncns->workers[p], NULL) != EINTR) + if (pthread_join(resolv->workers[p], NULL) != EINTR) break; } } /* Close all communication channels */ for (i = 0; i < MESSAGE_FD_MAX; i++) - if (asyncns->fds[i] >= 0) - close(asyncns->fds[i]); + if (resolv->fds[i] >= 0) + close(resolv->fds[i]); for (p = 0; p < MAX_QUERIES; p++) - if (asyncns->queries[p]) - sd_resolv_cancel(asyncns, asyncns->queries[p]); + if (resolv->queries[p]) + sd_resolv_cancel(resolv, resolv->queries[p]); - free(asyncns); + free(resolv); errno = saved_errno; } -int sd_resolv_fd(sd_resolv_t *asyncns) { - assert(asyncns); +int sd_resolv_fd(sd_resolv_t *resolv) { + assert(resolv); - return asyncns->fds[RESPONSE_RECV_FD]; + return resolv->fds[RESPONSE_RECV_FD]; } -static sd_resolv_query_t *lookup_query(sd_resolv_t *asyncns, unsigned id) { +static sd_resolv_query_t *lookup_query(sd_resolv_t *resolv, unsigned id) { sd_resolv_query_t *q; - assert(asyncns); + assert(resolv); - q = asyncns->queries[id % MAX_QUERIES]; + q = resolv->queries[id % MAX_QUERIES]; if (q) if (q->id == id) return q; @@ -541,19 +541,19 @@ static sd_resolv_query_t *lookup_query(sd_resolv_t *asyncns, unsigned id) { return NULL; } -static void complete_query(sd_resolv_t *asyncns, sd_resolv_query_t *q) { - assert(asyncns); +static void complete_query(sd_resolv_t *resolv, sd_resolv_query_t *q) { + assert(resolv); assert(q); assert(!q->done); q->done = 1; - if ((q->done_prev = asyncns->done_tail)) - asyncns->done_tail->done_next = q; + if ((q->done_prev = resolv->done_tail)) + resolv->done_tail->done_next = q; else - asyncns->done_head = q; + resolv->done_head = q; - asyncns->done_tail = q; + resolv->done_tail = q; q->done_next = NULL; } @@ -613,11 +613,11 @@ fail: return NULL; } -static int handle_response(sd_resolv_t *asyncns, const packet_t *packet, size_t length) { +static int handle_response(sd_resolv_t *resolv, const packet_t *packet, size_t length) { const rheader_t *resp; sd_resolv_query_t *q; - assert(asyncns); + assert(resolv); resp = &packet->rheader; assert(resp); @@ -625,11 +625,11 @@ static int handle_response(sd_resolv_t *asyncns, const packet_t *packet, size_t assert(length == resp->length); if (resp->type == RESPONSE_DIED) { - asyncns->dead = 1; + resolv->dead = 1; return 0; } - q = lookup_query(asyncns, resp->id); + q = lookup_query(resolv, resp->id); if (!q) return 0; @@ -666,7 +666,7 @@ static int handle_response(sd_resolv_t *asyncns, const packet_t *packet, size_t prev = ai; } - complete_query(asyncns, q); + complete_query(resolv, q); break; } @@ -688,7 +688,7 @@ static int handle_response(sd_resolv_t *asyncns, const packet_t *packet, size_t if (!(q->serv = strndup((const char*) ni_resp + sizeof(nameinfo_response_t) + ni_resp->hostlen, ni_resp->servlen-1))) q->ret = EAI_MEMORY; - complete_query(asyncns, q); + complete_query(resolv, q); break; } @@ -710,7 +710,7 @@ static int handle_response(sd_resolv_t *asyncns, const packet_t *packet, size_t memcpy(q->serv, (const char *)resp + sizeof(res_response_t), res_resp->ret); } - complete_query(asyncns, q); + complete_query(resolv, q); break; } @@ -721,20 +721,20 @@ static int handle_response(sd_resolv_t *asyncns, const packet_t *packet, size_t return 0; } -int sd_resolv_wait(sd_resolv_t *asyncns, int block) { +int sd_resolv_wait(sd_resolv_t *resolv, int block) { int handled = 0; - assert(asyncns); + assert(resolv); for (;;) { packet_t buf[BUFSIZE/sizeof(packet_t) + 1]; ssize_t l; - if (asyncns->dead) { + if (resolv->dead) { errno = ECHILD; return -1; } - l = recv(asyncns->fds[RESPONSE_RECV_FD], buf, sizeof(buf), 0); + l = recv(resolv->fds[RESPONSE_RECV_FD], buf, sizeof(buf), 0); if (l < 0) { fd_set fds; @@ -745,49 +745,49 @@ int sd_resolv_wait(sd_resolv_t *asyncns, int block) { return 0; FD_ZERO(&fds); - FD_SET(asyncns->fds[RESPONSE_RECV_FD], &fds); + FD_SET(resolv->fds[RESPONSE_RECV_FD], &fds); - if (select(asyncns->fds[RESPONSE_RECV_FD]+1, &fds, NULL, NULL, NULL) < 0) + if (select(resolv->fds[RESPONSE_RECV_FD]+1, &fds, NULL, NULL, NULL) < 0) return -1; continue; } - if (handle_response(asyncns, buf, (size_t) l) < 0) + if (handle_response(resolv, buf, (size_t) l) < 0) return -1; handled = 1; } } -static sd_resolv_query_t *alloc_query(sd_resolv_t *asyncns) { +static sd_resolv_query_t *alloc_query(sd_resolv_t *resolv) { sd_resolv_query_t *q; - assert(asyncns); + assert(resolv); - if (asyncns->n_queries >= MAX_QUERIES) { + if (resolv->n_queries >= MAX_QUERIES) { errno = ENOMEM; return NULL; } - while (asyncns->queries[asyncns->current_index]) { - asyncns->current_index++; - asyncns->current_id++; + while (resolv->queries[resolv->current_index]) { + resolv->current_index++; + resolv->current_id++; - while (asyncns->current_index >= MAX_QUERIES) - asyncns->current_index -= MAX_QUERIES; + while (resolv->current_index >= MAX_QUERIES) + resolv->current_index -= MAX_QUERIES; } - q = asyncns->queries[asyncns->current_index] = malloc(sizeof(sd_resolv_query_t)); + q = resolv->queries[resolv->current_index] = malloc(sizeof(sd_resolv_query_t)); if (!q) { errno = ENOMEM; return NULL; } - asyncns->n_queries++; + resolv->n_queries++; - q->asyncns = asyncns; + q->resolv = resolv; q->done = 0; - q->id = asyncns->current_id; + q->id = resolv->current_id; q->done_next = q->done_prev = NULL; q->ret = 0; q->_errno = 0; @@ -799,19 +799,19 @@ static sd_resolv_query_t *alloc_query(sd_resolv_t *asyncns) { return q; } -sd_resolv_query_t* sd_resolv_getaddrinfo(sd_resolv_t *asyncns, const char *node, const char *service, const struct addrinfo *hints) { +sd_resolv_query_t* sd_resolv_getaddrinfo(sd_resolv_t *resolv, const char *node, const char *service, const struct addrinfo *hints) { addrinfo_request_t data[BUFSIZE/sizeof(addrinfo_request_t) + 1] = {}; addrinfo_request_t *req = data; sd_resolv_query_t *q; - assert(asyncns); + assert(resolv); assert(node || service); - if (asyncns->dead) { + if (resolv->dead) { errno = ECHILD; return NULL; } - q = alloc_query(asyncns); + q = alloc_query(resolv); if (!q) return NULL; @@ -840,26 +840,26 @@ sd_resolv_query_t* sd_resolv_getaddrinfo(sd_resolv_t *asyncns, const char *node, if (service) strcpy((char*) req + sizeof(addrinfo_request_t) + req->node_len, service); - if (send(asyncns->fds[REQUEST_SEND_FD], req, req->header.length, MSG_NOSIGNAL) < 0) + if (send(resolv->fds[REQUEST_SEND_FD], req, req->header.length, MSG_NOSIGNAL) < 0) goto fail; return q; fail: if (q) - sd_resolv_cancel(asyncns, q); + sd_resolv_cancel(resolv, q); return NULL; } -int sd_resolv_getaddrinfo_done(sd_resolv_t *asyncns, sd_resolv_query_t* q, struct addrinfo **ret_res) { +int sd_resolv_getaddrinfo_done(sd_resolv_t *resolv, sd_resolv_query_t* q, struct addrinfo **ret_res) { int ret; - assert(asyncns); + assert(resolv); assert(q); - assert(q->asyncns == asyncns); + assert(q->resolv == resolv); assert(q->type == REQUEST_ADDRINFO); - if (asyncns->dead) { + if (resolv->dead) { errno = ECHILD; return EAI_SYSTEM; } @@ -878,26 +878,26 @@ int sd_resolv_getaddrinfo_done(sd_resolv_t *asyncns, sd_resolv_query_t* q, struc if (ret != 0) h_errno = q->_h_errno; - sd_resolv_cancel(asyncns, q); + sd_resolv_cancel(resolv, q); return ret; } -sd_resolv_query_t* sd_resolv_getnameinfo(sd_resolv_t *asyncns, const struct sockaddr *sa, socklen_t salen, int flags, int gethost, int getserv) { +sd_resolv_query_t* sd_resolv_getnameinfo(sd_resolv_t *resolv, const struct sockaddr *sa, socklen_t salen, int flags, int gethost, int getserv) { nameinfo_request_t data[BUFSIZE/sizeof(nameinfo_request_t) + 1] = {}; nameinfo_request_t *req = data; sd_resolv_query_t *q; - assert(asyncns); + assert(resolv); assert(sa); assert(salen > 0); - if (asyncns->dead) { + if (resolv->dead) { errno = ECHILD; return NULL; } - q = alloc_query(asyncns); + q = alloc_query(resolv); if (!q) return NULL; @@ -917,28 +917,28 @@ sd_resolv_query_t* sd_resolv_getnameinfo(sd_resolv_t *asyncns, const struct sock memcpy((uint8_t*) req + sizeof(nameinfo_request_t), sa, salen); - if (send(asyncns->fds[REQUEST_SEND_FD], req, req->header.length, MSG_NOSIGNAL) < 0) + if (send(resolv->fds[REQUEST_SEND_FD], req, req->header.length, MSG_NOSIGNAL) < 0) goto fail; return q; fail: if (q) - sd_resolv_cancel(asyncns, q); + sd_resolv_cancel(resolv, q); return NULL; } -int sd_resolv_getnameinfo_done(sd_resolv_t *asyncns, sd_resolv_query_t* q, char *ret_host, size_t hostlen, char *ret_serv, size_t servlen) { +int sd_resolv_getnameinfo_done(sd_resolv_t *resolv, sd_resolv_query_t* q, char *ret_host, size_t hostlen, char *ret_serv, size_t servlen) { int ret; - assert(asyncns); + assert(resolv); assert(q); - assert(q->asyncns == asyncns); + assert(q->resolv == resolv); assert(q->type == REQUEST_NAMEINFO); assert(!ret_host || hostlen); assert(!ret_serv || servlen); - if (asyncns->dead) { + if (resolv->dead) { errno = ECHILD; return EAI_SYSTEM; } @@ -964,25 +964,25 @@ int sd_resolv_getnameinfo_done(sd_resolv_t *asyncns, sd_resolv_query_t* q, char if (ret != 0) h_errno = q->_h_errno; - sd_resolv_cancel(asyncns, q); + sd_resolv_cancel(resolv, q); return ret; } -static sd_resolv_query_t * asyncns_res(sd_resolv_t *asyncns, query_type_t qtype, const char *dname, int class, int type) { +static sd_resolv_query_t * resolv_res(sd_resolv_t *resolv, query_type_t qtype, const char *dname, int class, int type) { res_request_t data[BUFSIZE/sizeof(res_request_t) + 1]; res_request_t *req = data; sd_resolv_query_t *q; - assert(asyncns); + assert(resolv); assert(dname); - if (asyncns->dead) { + if (resolv->dead) { errno = ECHILD; return NULL; } - q = alloc_query(asyncns); + q = alloc_query(resolv); if (!q) return NULL; @@ -1002,35 +1002,35 @@ static sd_resolv_query_t * asyncns_res(sd_resolv_t *asyncns, query_type_t qtype, strcpy((char*) req + sizeof(res_request_t), dname); - if (send(asyncns->fds[REQUEST_SEND_FD], req, req->header.length, MSG_NOSIGNAL) < 0) + if (send(resolv->fds[REQUEST_SEND_FD], req, req->header.length, MSG_NOSIGNAL) < 0) goto fail; return q; fail: if (q) - sd_resolv_cancel(asyncns, q); + sd_resolv_cancel(resolv, q); return NULL; } -sd_resolv_query_t* sd_resolv_res_query(sd_resolv_t *asyncns, const char *dname, int class, int type) { - return asyncns_res(asyncns, REQUEST_RES_QUERY, dname, class, type); +sd_resolv_query_t* sd_resolv_res_query(sd_resolv_t *resolv, const char *dname, int class, int type) { + return resolv_res(resolv, REQUEST_RES_QUERY, dname, class, type); } -sd_resolv_query_t* sd_resolv_res_search(sd_resolv_t *asyncns, const char *dname, int class, int type) { - return asyncns_res(asyncns, REQUEST_RES_SEARCH, dname, class, type); +sd_resolv_query_t* sd_resolv_res_search(sd_resolv_t *resolv, const char *dname, int class, int type) { + return resolv_res(resolv, REQUEST_RES_SEARCH, dname, class, type); } -int sd_resolv_res_done(sd_resolv_t *asyncns, sd_resolv_query_t* q, unsigned char **answer) { +int sd_resolv_res_done(sd_resolv_t *resolv, sd_resolv_query_t* q, unsigned char **answer) { int ret; - assert(asyncns); + assert(resolv); assert(q); - assert(q->asyncns == asyncns); + assert(q->resolv == resolv); assert(q->type == REQUEST_RES_QUERY || q->type == REQUEST_RES_SEARCH); assert(answer); - if (asyncns->dead) { + if (resolv->dead) { errno = ECHILD; return -ECHILD; } @@ -1050,52 +1050,52 @@ int sd_resolv_res_done(sd_resolv_t *asyncns, sd_resolv_query_t* q, unsigned char h_errno = q->_h_errno; } - sd_resolv_cancel(asyncns, q); + sd_resolv_cancel(resolv, q); return ret < 0 ? -errno : ret; } -sd_resolv_query_t* sd_resolv_getnext(sd_resolv_t *asyncns) { - assert(asyncns); - return asyncns->done_head; +sd_resolv_query_t* sd_resolv_getnext(sd_resolv_t *resolv) { + assert(resolv); + return resolv->done_head; } -int sd_resolv_getnqueries(sd_resolv_t *asyncns) { - assert(asyncns); - return asyncns->n_queries; +int sd_resolv_getnqueries(sd_resolv_t *resolv) { + assert(resolv); + return resolv->n_queries; } -void sd_resolv_cancel(sd_resolv_t *asyncns, sd_resolv_query_t* q) { +void sd_resolv_cancel(sd_resolv_t *resolv, sd_resolv_query_t* q) { int i; int saved_errno = errno; - assert(asyncns); + assert(resolv); assert(q); - assert(q->asyncns == asyncns); - assert(asyncns->n_queries > 0); + assert(q->resolv == resolv); + assert(resolv->n_queries > 0); if (q->done) { if (q->done_prev) q->done_prev->done_next = q->done_next; else - asyncns->done_head = q->done_next; + resolv->done_head = q->done_next; if (q->done_next) q->done_next->done_prev = q->done_prev; else - asyncns->done_tail = q->done_prev; + resolv->done_tail = q->done_prev; } i = q->id % MAX_QUERIES; - assert(asyncns->queries[i] == q); - asyncns->queries[i] = NULL; + assert(resolv->queries[i] == q); + resolv->queries[i] = NULL; sd_resolv_freeaddrinfo(q->addrinfo); free(q->host); free(q->serv); - asyncns->n_queries--; + resolv->n_queries--; free(q); errno = saved_errno; @@ -1123,7 +1123,7 @@ void sd_resolv_freeanswer(unsigned char *answer) { if (!answer) return; - /* Please note that this function is new in libasyncns 0.4. In + /* Please note that this function is new in libresolv 0.4. In * older versions you were supposed to free the answer directly * with free(). Hence, if this function is changed to do more than * just a simple free() this must be considered ABI/API breakage! */ @@ -1133,26 +1133,26 @@ void sd_resolv_freeanswer(unsigned char *answer) { errno = saved_errno; } -int sd_resolv_isdone(sd_resolv_t *asyncns, sd_resolv_query_t*q) { - assert(asyncns); +int sd_resolv_isdone(sd_resolv_t *resolv, sd_resolv_query_t*q) { + assert(resolv); assert(q); - assert(q->asyncns == asyncns); + assert(q->resolv == resolv); return q->done; } -void sd_resolv_setuserdata(sd_resolv_t *asyncns, sd_resolv_query_t *q, void *userdata) { +void sd_resolv_setuserdata(sd_resolv_t *resolv, sd_resolv_query_t *q, void *userdata) { assert(q); - assert(asyncns); - assert(q->asyncns = asyncns); + assert(resolv); + assert(q->resolv = resolv); q->userdata = userdata; } -void* sd_resolv_getuserdata(sd_resolv_t *asyncns, sd_resolv_query_t *q) { +void* sd_resolv_getuserdata(sd_resolv_t *resolv, sd_resolv_query_t *q) { assert(q); - assert(asyncns); - assert(q->asyncns = asyncns); + assert(resolv); + assert(q->resolv = resolv); return q->userdata; } |