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CLEANUP: dns: Remove useless test on ns->dgram in dns_connect_nameserver()

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When dns_connect_nameserver() is called, the nameserver has always a dgram
field properly defined. The caller, dns_send_nameserver(), already performed
the appropriate verification.
This commit is contained in:
Christopher Faulet 2021-03-04 16:58:35 +01:00
parent 1a1b674c2c
commit 1e711beb51
1 changed files with 27 additions and 31 deletions
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58
src/dns.c
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@ -41,44 +41,40 @@ DECLARE_STATIC_POOL(dns_query_pool, "dns_query", sizeof(struct dns_query));
DECLARE_STATIC_POOL(dns_msg_buf, "dns_msg_buf", DNS_TCP_MSG_RING_MAX_SIZE); DECLARE_STATIC_POOL(dns_msg_buf, "dns_msg_buf", DNS_TCP_MSG_RING_MAX_SIZE);
/* Opens an UDP socket on the namesaver's IP/Port, if required. Returns 0 on /* Opens an UDP socket on the namesaver's IP/Port, if required. Returns 0 on
* success, -1 otherwise. * success, -1 otherwise. ns->dgram must be defined.
*/ */
static int dns_connect_nameserver(struct dns_nameserver *ns) static int dns_connect_nameserver(struct dns_nameserver *ns)
{ {
if (ns->dgram) { struct dgram_conn *dgram = &ns->dgram->conn;
struct dgram_conn *dgram = &ns->dgram->conn; int fd;
int fd;
/* Already connected */ /* Already connected */
if (dgram->t.sock.fd != -1) if (dgram->t.sock.fd != -1)
return 0;
/* Create an UDP socket and connect it on the nameserver's IP/Port */
if ((fd = socket(dgram->addr.to.ss_family, SOCK_DGRAM, IPPROTO_UDP)) == -1) {
send_log(NULL, LOG_WARNING,
"DNS : section '%s': can't create socket for nameserver '%s'.\n",
ns->counters->pid, ns->id);
return -1;
}
if (connect(fd, (struct sockaddr*)&dgram->addr.to, get_addr_len(&dgram->addr.to)) == -1) {
send_log(NULL, LOG_WARNING,
"DNS : section '%s': can't connect socket for nameserver '%s'.\n",
ns->counters->id, ns->id);
close(fd);
return -1;
}
/* Make the socket non blocking */
fcntl(fd, F_SETFL, O_NONBLOCK);
/* Add the fd in the fd list and update its parameters */
dgram->t.sock.fd = fd;
fd_insert(fd, dgram, dgram_fd_handler, MAX_THREADS_MASK);
fd_want_recv(fd);
return 0; return 0;
/* Create an UDP socket and connect it on the nameserver's IP/Port */
if ((fd = socket(dgram->addr.to.ss_family, SOCK_DGRAM, IPPROTO_UDP)) == -1) {
send_log(NULL, LOG_WARNING,
"DNS : section '%s': can't create socket for nameserver '%s'.\n",
ns->counters->pid, ns->id);
return -1;
}
if (connect(fd, (struct sockaddr*)&dgram->addr.to, get_addr_len(&dgram->addr.to)) == -1) {
send_log(NULL, LOG_WARNING,
"DNS : section '%s': can't connect socket for nameserver '%s'.\n",
ns->counters->id, ns->id);
close(fd);
return -1;
} }
return -1; /* Make the socket non blocking */
fcntl(fd, F_SETFL, O_NONBLOCK);
/* Add the fd in the fd list and update its parameters */
dgram->t.sock.fd = fd;
fd_insert(fd, dgram, dgram_fd_handler, MAX_THREADS_MASK);
fd_want_recv(fd);
return 0;
} }
/* Sends a message to a name server /* Sends a message to a name server