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sd-resolv: rename old asyncns variables

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This commit is contained in:
Daniel Buch
2014-01-14 13:32:13 +01:00
committed by Tom Gundersen
parent 2a4be8ad98
commit 12f404c4d1
3 changed files with 178 additions and 178 deletions
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src/libsystemd/sd-resolv.c
+141 -141
View File
@@ -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;
}
src/libsystemd/test-resolv.c
+13 -13
View File
@@ -37,7 +37,7 @@
int main(int argc, char *argv[]) {
int r = 1, ret;
_cleanup_resolv_free_ sd_resolv_t *asyncns = NULL;
_cleanup_resolv_free_ sd_resolv_t *resolv = NULL;
_cleanup_resolv_addrinfo_free_ struct addrinfo *ai = NULL;
_cleanup_resolv_answer_free_ unsigned char *srv = NULL;
sd_resolv_query_t *q1, *q2, *q3;
@@ -47,15 +47,15 @@ int main(int argc, char *argv[]) {
signal(SIGCHLD, SIG_IGN);
asyncns = sd_resolv_new(2);
if (!asyncns)
resolv = sd_resolv_new(2);
if (!resolv)
log_oom();
/* Make a name -> address query */
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
q1 = sd_resolv_getaddrinfo(asyncns, argc >= 2 ? argv[1] : "www.heise.de", NULL, &hints);
q1 = sd_resolv_getaddrinfo(resolv, argc >= 2 ? argv[1] : "www.heise.de", NULL, &hints);
if (!q1)
fprintf(stderr, "sd_resolv_getaddrinfo(): %s\n", strerror(errno));
@@ -64,25 +64,25 @@ int main(int argc, char *argv[]) {
sa.sin_addr.s_addr = inet_addr(argc >= 3 ? argv[2] : "193.99.144.71");
sa.sin_port = htons(80);
q2 = sd_resolv_getnameinfo(asyncns, (struct sockaddr*) &sa, sizeof(sa), 0, 1, 1);
q2 = sd_resolv_getnameinfo(resolv, (struct sockaddr*) &sa, sizeof(sa), 0, 1, 1);
if (!q2)
fprintf(stderr, "sd_resolv_getnameinfo(): %s\n", strerror(errno));
/* Make a res_query() call */
q3 = sd_resolv_res_query(asyncns, "_xmpp-client._tcp.gmail.com", C_IN, T_SRV);
q3 = sd_resolv_res_query(resolv, "_xmpp-client._tcp.gmail.com", C_IN, T_SRV);
if (!q3)
fprintf(stderr, "sd_resolv_res_query(): %s\n", strerror(errno));
/* Wait until the three queries are completed */
while (!sd_resolv_isdone(asyncns, q1) ||
!sd_resolv_isdone(asyncns, q2) ||
!sd_resolv_isdone(asyncns, q3)) {
if (sd_resolv_wait(asyncns, 1) < 0)
while (!sd_resolv_isdone(resolv, q1) ||
!sd_resolv_isdone(resolv, q2) ||
!sd_resolv_isdone(resolv, q3)) {
if (sd_resolv_wait(resolv, 1) < 0)
fprintf(stderr, "sd_resolv_wait(): %s\n", strerror(errno));
}
/* Interpret the result of the name -> addr query */
ret = sd_resolv_getaddrinfo_done(asyncns, q1, &ai);
ret = sd_resolv_getaddrinfo_done(resolv, q1, &ai);
if (ret)
fprintf(stderr, "error: %s %i\n", gai_strerror(ret), ret);
else {
@@ -102,14 +102,14 @@ int main(int argc, char *argv[]) {
}
/* Interpret the result of the addr -> name query */
ret = sd_resolv_getnameinfo_done(asyncns, q2, host, sizeof(host), serv, sizeof(serv));
ret = sd_resolv_getnameinfo_done(resolv, q2, host, sizeof(host), serv, sizeof(serv));
if (ret)
fprintf(stderr, "error: %s %i\n", gai_strerror(ret), ret);
else
printf("%s -- %s\n", host, serv);
/* Interpret the result of the SRV lookup */
ret = sd_resolv_res_done(asyncns, q3, &srv);
ret = sd_resolv_res_done(resolv, q3, &srv);
if (ret < 0) {
fprintf(stderr, "error: %s %i\n", strerror(errno), ret);
} else if (ret == 0) {
src/systemd/sd-resolv.h
+24 -24
View File
@@ -33,48 +33,48 @@ _SD_BEGIN_DECLARATIONS;
*
* \section moo Method of operation
*
* To use libasyncns allocate an sd_resolv_t object with
* To use libresolv allocate an sd_resolv_t object with
* sd_resolv_new(). This will spawn a number of worker threads (or processes, depending on what is available) which
* are subsequently used to process the queries the controlling
* program issues via sd_resolv_getaddrinfo() and
* sd_resolv_getnameinfo(). Use sd_resolv_free() to shut down the worker
* threads/processes.
*
* Since libasyncns may fork off new processes you have to make sure that
* Since libresolv may fork off new processes you have to make sure that
* your program is not irritated by spurious SIGCHLD signals.
*/
/** An opaque libasyncns session structure */
/** An opaque libresolv session structure */
typedef struct sd_resolv sd_resolv_t;
/** An opaque libasyncns query structure */
/** An opaque libresolv query structure */
typedef struct sd_resolv_query sd_resolv_query_t;
/** Allocate a new libasyncns session with n_proc worker processes/threads */
/** Allocate a new libresolv session with n_proc worker processes/threads */
sd_resolv_t* sd_resolv_new(unsigned n_proc);
/** Free a libasyncns session. This destroys all attached
/** Free a libresolv session. This destroys all attached
* sd_resolv_query_t objects automatically */
void sd_resolv_free(sd_resolv_t *asyncns);
void sd_resolv_free(sd_resolv_t *resolv);
/** Return the UNIX file descriptor to select() for readability
* on. Use this function to integrate libasyncns with your custom main
* on. Use this function to integrate libresolv with your custom main
* loop. */
int sd_resolv_fd(sd_resolv_t *asyncns);
int sd_resolv_fd(sd_resolv_t *resolv);
/** Process pending responses. After this function is called you can
* get the next completed query object(s) using sd_resolv_getnext(). If
* block is non-zero wait until at least one response has been
* processed. If block is zero, process all pending responses and
* return. */
int sd_resolv_wait(sd_resolv_t *asyncns, int block);
int sd_resolv_wait(sd_resolv_t *resolv, int block);
/** Issue a name to address query on the specified session. The
* arguments are compatible with the ones of libc's
* getaddrinfo(3). The function returns a new query object. When the
* query is completed you may retrieve the results using
* sd_resolv_getaddrinfo_done().*/
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);
/** Retrieve the results of a preceding sd_resolv_getaddrinfo()
* call. Returns a addrinfo structure and a return value compatible
@@ -83,7 +83,7 @@ sd_resolv_query_t* sd_resolv_getaddrinfo(sd_resolv_t *asyncns, const char *node,
* returned addrinfo structure with sd_resolv_freeaddrinfo() and not
* libc's freeaddrinfo(3)! If the query is not completed yet EAI_AGAIN
* is returned.*/
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);
/** Issue an address to name query on the specified session. The
* arguments are compatible with the ones of libc's
@@ -91,48 +91,48 @@ int sd_resolv_getaddrinfo_done(sd_resolv_t *asyncns, sd_resolv_query_t* q, struc
* query is completed you may retrieve the results using
* sd_resolv_getnameinfo_done(). Set gethost (resp. getserv) to non-zero
* if you want to query the hostname (resp. the service name). */
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);
/** Retrieve the results of a preceding sd_resolv_getnameinfo()
* call. Returns the hostname and the service name in ret_host and
* ret_serv. The query object q is destroyed by this call and may not
* be used any further. If the query is not completed yet EAI_AGAIN is
* returned. */
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);
/** Issue a resolver query on the specified session. The arguments are
* compatible with the ones of libc's res_query(3). The function returns a new
* query object. When the query is completed you may retrieve the results using
* sd_resolv_res_done(). */
sd_resolv_query_t* sd_resolv_res_query(sd_resolv_t *asyncns, const char *dname, int class, int type);
sd_resolv_query_t* sd_resolv_res_query(sd_resolv_t *resolv, const char *dname, int class, int type);
/** Issue an resolver query on the specified session. The arguments are
* compatible with the ones of libc's res_search(3). The function returns a new
* query object. When the query is completed you may retrieve the results using
* sd_resolv_res_done(). */
sd_resolv_query_t* sd_resolv_res_search(sd_resolv_t *asyncns, const char *dname, int class, int type);
sd_resolv_query_t* sd_resolv_res_search(sd_resolv_t *resolv, const char *dname, int class, int type);
/** Retrieve the results of a preceding sd_resolv_res_query() or
* asyncns_res_search call. The query object q is destroyed by this
* resolv_res_search call. The query object q is destroyed by this
* call and may not be used any further. Returns a pointer to the
* answer of the res_query call. If the query is not completed yet
* -EAGAIN is returned, on failure -errno is returned, otherwise the
* length of answer is returned. Make sure to free the answer is a
* call to sd_resolv_freeanswer(). */
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);
/** Return the next completed query object. If no query has been
* completed yet, return NULL. Please note that you need to run
* sd_resolv_wait() before this function will return sensible data. */
sd_resolv_query_t* sd_resolv_getnext(sd_resolv_t *asyncns);
sd_resolv_query_t* sd_resolv_getnext(sd_resolv_t *resolv);
/** Return the number of query objects (completed or not) attached to
* this session */
int sd_resolv_getnqueries(sd_resolv_t *asyncns);
int sd_resolv_getnqueries(sd_resolv_t *resolv);
/** Cancel a currently running query. q is is destroyed by this call
* and may not be used any futher. */
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);
/** Free the addrinfo structure as returned by
* sd_resolv_getaddrinfo_done(). Make sure to use this functions instead
@@ -143,15 +143,15 @@ void sd_resolv_freeaddrinfo(struct addrinfo *ai);
void sd_resolv_freeanswer(unsigned char *answer);
/** Returns non-zero when the query operation specified by q has been completed */
int sd_resolv_isdone(sd_resolv_t *asyncns, sd_resolv_query_t*q);
int sd_resolv_isdone(sd_resolv_t *resolv, sd_resolv_query_t*q);
/** Assign some opaque userdata with a query object */
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);
/** Return userdata assigned to a query object. Use
* sd_resolv_setuserdata() to set this data. If no data has been set
* prior to this call it returns NULL. */
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);
_SD_END_DECLARATIONS;