Remove unused hostname resolution in shm plugins and aserver

PCM and control shm plugins and aserver have some codes to resolve the
host address and check whether it's a local host although the given
address is never used.  In addition, the code contains gethostbyname()
that is known to be obsoleted.  So, let's get rid of all these unused
codes.

The host configuration item is still accepted (but just ignored) for
keeping the compatibility.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

5 files changed, 6 insertions, 175 deletions

diff --git a/aserver/aserver.c b/aserver/aserver.c
index 73ea4e95..1579da7b 100644
--- a/aserver/aserver.c
+++ b/aserver/aserver.c
@@ -1013,11 +1013,10 @@ int main(int argc, char **argv)
 	snd_config_t *conf;
 	snd_config_iterator_t i, next;
 	const char *sockname = NULL;
-	const char *host = NULL;
 	long port = -1;
 	int err;
 	char *srvname;
-	struct hostent *h;
+
 	command = argv[0];
 	while ((c = getopt_long(argc, argv, "h", long_options, 0)) != -1) {
 		switch (c) {
@@ -1055,14 +1054,8 @@ int main(int argc, char **argv)
 			continue;
 		if (strcmp(id, "comment") == 0)
 			continue;
-		if (strcmp(id, "host") == 0) {
-			err = snd_config_get_string(n, &host);
-			if (err < 0) {
-				ERROR("Invalid type for %s", id);
-				return 1;
-			}
+		if (strcmp(id, "host") == 0)
 			continue;
-		}
 		if (strcmp(id, "socket") == 0) {
 			err = snd_config_get_string(n, &sockname);
 			if (err < 0) {
@@ -1082,19 +1075,6 @@ int main(int argc, char **argv)
 		ERROR("Unknown field %s", id);
 		return 1;
 	}
-	if (!host) {
-		ERROR("host is not defined");
-		return 1;
-	}
-	h = gethostbyname(host);
-	if (!h) {
-		ERROR("Cannot resolve %s", host);
-		return 1;
-	}
-	if (!snd_is_local(h)) {
-		ERROR("%s is not the local host", host);
-		return 1;
-	}
 	if (!sockname && port < 0) {
 		ERROR("either socket or port need to be defined");
 		return 1;
diff --git a/include/aserver.h b/include/aserver.h
index 25868324..5da2e544 100644
--- a/include/aserver.h
+++ b/include/aserver.h
@@ -23,7 +23,6 @@
 #include "../src/control/control_local.h"
 
 int snd_receive_fd(int sock, void *data, size_t len, int *fd);
-int snd_is_local(struct hostent *hent);
 
 typedef enum _snd_dev_type {
 	SND_DEV_TYPE_PCM,
diff --git a/src/control/control_shm.c b/src/control/control_shm.c
index abab3983..40bc705d 100644
--- a/src/control/control_shm.c
+++ b/src/control/control_shm.c
@@ -441,29 +441,6 @@ static int make_local_socket(const char *filename)
 	return sock;
 }
 
-#if 0
-static int make_inet_socket(const char *host, int port)
-{
-	struct sockaddr_in addr;
-	int sock;
-	struct hostent *h = gethostbyname(host);
-	if (!h)
-		return -ENOENT;
-
-	sock = socket(PF_INET, SOCK_STREAM, 0);
-	if (sock < 0)
-		return -errno;
-	
-	addr.sin_family = AF_INET;
-	addr.sin_port = htons(port);
-	memcpy(&addr.sin_addr, h->h_addr_list[0], sizeof(struct in_addr));
-
-	if (connect(sock, (struct sockaddr *) &addr, sizeof(addr)) < 0)
-		return -errno;
-	return sock;
-}
-#endif
-
 int snd_ctl_shm_open(snd_ctl_t **handlep, const char *name, const char *sockname, const char *sname, int mode)
 {
 	snd_ctl_t *ctl;
@@ -565,12 +542,10 @@ int _snd_ctl_shm_open(snd_ctl_t **handlep, char *name, snd_config_t *root, snd_c
 	const char *server = NULL;
 	const char *ctl_name = NULL;
 	snd_config_t *sconfig;
-	const char *host = NULL;
 	const char *sockname = NULL;
 	long port = -1;
 	int err;
-	int local;
-	struct hostent *h;
+
 	snd_config_for_each(i, next, conf) {
 		snd_config_t *n = snd_config_iterator_entry(i);
 		const char *id;
@@ -624,14 +599,8 @@ int _snd_ctl_shm_open(snd_ctl_t **handlep, char *name, snd_config_t *root, snd_c
 			continue;
 		if (strcmp(id, "comment") == 0)
 			continue;
-		if (strcmp(id, "host") == 0) {
-			err = snd_config_get_string(n, &host);
-			if (err < 0) {
-				SNDERR("Invalid type for %s", id);
-				goto _err;
-			}
+		if (strcmp(id, "host") == 0)
 			continue;
-		}
 		if (strcmp(id, "socket") == 0) {
 			err = snd_config_get_string(n, &sockname);
 			if (err < 0) {
@@ -653,24 +622,10 @@ int _snd_ctl_shm_open(snd_ctl_t **handlep, char *name, snd_config_t *root, snd_c
 		goto _err;
 	}
 
-	if (!host) {
-		SNDERR("host is not defined");
-		goto _err;
-	}
 	if (!sockname) {
 		SNDERR("socket is not defined");
 		goto _err;
 	}
-	h = gethostbyname(host);
-	if (!h) {
-		SNDERR("Cannot resolve %s", host);
-		goto _err;
-	}
-	local = snd_is_local(h);
-	if (!local) {
-		SNDERR("%s is not the local host", host);
-		goto _err;
-	}
 	err = snd_ctl_shm_open(handlep, name, sockname, ctl_name, mode);
        _err:
 	snd_config_delete(sconfig);
diff --git a/src/pcm/pcm_shm.c b/src/pcm/pcm_shm.c
index 69d05240..a815ac6b 100644
--- a/src/pcm/pcm_shm.c
+++ b/src/pcm/pcm_shm.c
@@ -654,33 +654,6 @@ static int make_local_socket(const char *filename)
 	return sock;
 }
 
-#if 0
-static int make_inet_socket(const char *host, int port)
-{
-	struct sockaddr_in addr;
-	int sock;
-	struct hostent *h = gethostbyname(host);
-	if (!h)
-		return -ENOENT;
-
-	sock = socket(PF_INET, SOCK_STREAM, 0);
-	if (sock < 0) {
-		SYSERR("socket failed");
-		return -errno;
-	}
-	
-	addr.sin_family = AF_INET;
-	addr.sin_port = htons(port);
-	memcpy(&addr.sin_addr, h->h_addr_list[0], sizeof(struct in_addr));
-
-	if (connect(sock, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
-		SYSERR("connect failed");
-		return -errno;
-	}
-	return sock;
-}
-#endif
-
 /**
  * \brief Creates a new shared memory PCM
  * \param pcmp Returns created PCM handle
@@ -842,12 +815,10 @@ int _snd_pcm_shm_open(snd_pcm_t **pcmp, const char *name,
 	const char *server = NULL;
 	const char *pcm_name = NULL;
 	snd_config_t *sconfig;
-	const char *host = NULL;
 	const char *sockname = NULL;
 	long port = -1;
 	int err;
-	int local;
-	struct hostent *h;
+
 	snd_config_for_each(i, next, conf) {
 		snd_config_t *n = snd_config_iterator_entry(i);
 		const char *id;
@@ -898,14 +869,8 @@ int _snd_pcm_shm_open(snd_pcm_t **pcmp, const char *name,
 			continue;
 		if (strcmp(id, "comment") == 0)
 			continue;
-		if (strcmp(id, "host") == 0) {
-			err = snd_config_get_string(n, &host);
-			if (err < 0) {
-				SNDERR("Invalid type for %s", id);
-				goto _err;
-			}
+		if (strcmp(id, "host") == 0)
 			continue;
-		}
 		if (strcmp(id, "socket") == 0) {
 			err = snd_config_get_string(n, &sockname);
 			if (err < 0) {
@@ -928,24 +893,10 @@ int _snd_pcm_shm_open(snd_pcm_t **pcmp, const char *name,
 		goto __error;
 	}
 
-	if (!host) {
-		SNDERR("host is not defined");
-		goto _err;
-	}
 	if (!sockname) {
 		SNDERR("socket is not defined");
 		goto _err;
 	}
-	h = gethostbyname(host);
-	if (!h) {
-		SNDERR("Cannot resolve %s", host);
-		goto _err;
-	}
-	local = snd_is_local(h);
-	if (!local) {
-		SNDERR("%s is not the local host", host);
-		goto _err;
-	}
 	err = snd_pcm_shm_open(pcmp, name, sockname, pcm_name, stream, mode);
       __error:
 	snd_config_delete(sconfig);
diff --git a/src/socket.c b/src/socket.c
index 16979b52..d40c845e 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -106,58 +106,4 @@ int snd_receive_fd(int sock, void *data, size_t len, int *fd)
 	*fd = *fds;
 	return ret;
 }
-
-int snd_is_local(struct hostent *hent)
-{
-	int s;
-	int err;
-	struct ifconf conf;
-	size_t numreqs = 10;
-	size_t i;
-	struct in_addr *haddr = (struct in_addr*) hent->h_addr_list[0];
-	
-	s = socket(PF_INET, SOCK_STREAM, 0);
-	if (s < 0) {
-		SYSERR("socket failed");
-		return -errno;
-	}
-	
-	conf.ifc_len = numreqs * sizeof(struct ifreq);
-	conf.ifc_buf = malloc((unsigned int) conf.ifc_len);
-	if (! conf.ifc_buf) {
-		close(s);
-		return -ENOMEM;
-	}
-	while (1) {
-		err = ioctl(s, SIOCGIFCONF, &conf);
-		if (err < 0) {
-			SYSERR("SIOCGIFCONF failed");
-			close(s);
-			return -errno;
-		}
-		if ((size_t)conf.ifc_len < numreqs * sizeof(struct ifreq))
-			break;
-		numreqs *= 2;
-		conf.ifc_len = numreqs * sizeof(struct ifreq);
-		conf.ifc_buf = realloc(conf.ifc_buf, (unsigned int) conf.ifc_len);
-		if (! conf.ifc_buf) {
-			close(s);
-			return -ENOMEM;
-		}
-	}
-	numreqs = conf.ifc_len / sizeof(struct ifreq);
-	for (i = 0; i < numreqs; ++i) {
-		struct ifreq *req = &conf.ifc_req[i];
-		struct sockaddr_in *s_in = (struct sockaddr_in *)&req->ifr_addr;
-		s_in->sin_family = AF_INET;
-		err = ioctl(s, SIOCGIFADDR, req);
-		if (err < 0)
-			continue;
-		if (haddr->s_addr == s_in->sin_addr.s_addr)
-			break;
-	}
-	close(s);
-	free(conf.ifc_buf);
-	return i < numreqs;
-}
 #endif