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-rw-r--r--sock_stuff.c470
1 files changed, 241 insertions, 229 deletions
diff --git a/sock_stuff.c b/sock_stuff.c
index 43fdf0e..b51d6ba 100644
--- a/sock_stuff.c
+++ b/sock_stuff.c
@@ -17,270 +17,282 @@ static int verbose = 0;
void sock_stuff_set_verbose(int level)
{
- verbose = level;
+ verbose = level;
}
-int create_unix_socket (const char *filename)
+int create_unix_socket(const char *filename)
{
- struct sockaddr_un name;
- int sock;
- size_t size;
-
- // remove if still present
- unlink(filename);
-
- /* Create the socket. */
- sock = socket (PF_LOCAL, SOCK_STREAM, 0);
- if (sock < 0) {
- perror ("socket");
- return -1;
- }
-
- /* Bind a name to the socket. */
- name.sun_family = AF_LOCAL;
- strncpy (name.sun_path, filename, sizeof (name.sun_path));
- name.sun_path[sizeof (name.sun_path) - 1] = '\0';
-
- /* The size of the address is
- the offset of the start of the filename,
- plus its length,
- plus one for the terminating null byte.
- Alternatively you can just do:
- size = SUN_LEN (&name);
- */
- size = (offsetof (struct sockaddr_un, sun_path)
- + strlen (name.sun_path) + 1);
-
- if (bind (sock, (struct sockaddr *) &name, size) < 0) {
- perror("bind");
- close(sock);
- return -1;
- }
-
- if (listen(sock, 10) < 0) {
- perror("listen");
- close(sock);
- return -1;
- }
-
- return sock;
+ struct sockaddr_un name;
+ int sock;
+ size_t size;
+
+ // remove if still present
+ unlink(filename);
+
+ /* Create the socket. */
+ sock = socket(PF_LOCAL, SOCK_STREAM, 0);
+ if (sock < 0) {
+ perror("socket");
+ return -1;
+ }
+
+ /* Bind a name to the socket. */
+ name.sun_family = AF_LOCAL;
+ strncpy(name.sun_path, filename, sizeof(name.sun_path));
+ name.sun_path[sizeof(name.sun_path) - 1] = '\0';
+
+ /* The size of the address is
+ the offset of the start of the filename,
+ plus its length,
+ plus one for the terminating null byte.
+ Alternatively you can just do:
+ size = SUN_LEN (&name);
+ */
+ size = (offsetof(struct sockaddr_un, sun_path)
+ + strlen(name.sun_path) + 1);
+
+ if (bind(sock, (struct sockaddr *) &name, size) < 0) {
+ perror("bind");
+ close(sock);
+ return -1;
+ }
+
+ if (listen(sock, 10) < 0) {
+ perror("listen");
+ close(sock);
+ return -1;
+ }
+
+ return sock;
}
int connect_unix_socket(const char *filename)
{
- struct sockaddr_un name;
- int sfd = -1;
- size_t size;
- struct stat fst;
-
- // check if socket file exists...
- if (stat(filename, &fst) != 0) {
- if (verbose >= 2) fprintf(stderr, "%s: stat '%s': %s\n", __func__, filename, strerror(errno));
- return -1;
- }
-
- // ... and if it is a unix domain socket
- if (!S_ISSOCK(fst.st_mode)) {
- if (verbose >= 2) fprintf(stderr, "%s: File '%s' is not a socket!\n", __func__, filename);
- return -1;
- }
-
- // make a new socket
- if ((sfd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) {
- if (verbose >= 2) fprintf(stderr, "%s: socket: %s\n", __func__, strerror(errno));
- return -1;
- }
-
- // and connect to 'filename'
- name.sun_family = AF_LOCAL;
- strncpy(name.sun_path, filename, sizeof(name.sun_path));
- name.sun_path[sizeof(name.sun_path) - 1] = 0;
-
- size = (offsetof (struct sockaddr_un, sun_path)
- + strlen (name.sun_path) + 1);
-
- if (connect(sfd, (struct sockaddr*)&name, size) < 0) {
- close(sfd);
- if (verbose >= 2) fprintf(stderr, "%s: connect: %s\n", __func__, strerror(errno));
- return -1;
- }
-
- return sfd;
+ struct sockaddr_un name;
+ int sfd = -1;
+ size_t size;
+ struct stat fst;
+
+ // check if socket file exists...
+ if (stat(filename, &fst) != 0) {
+ if (verbose >= 2)
+ fprintf(stderr, "%s: stat '%s': %s\n", __func__, filename,
+ strerror(errno));
+ return -1;
+ }
+ // ... and if it is a unix domain socket
+ if (!S_ISSOCK(fst.st_mode)) {
+ if (verbose >= 2)
+ fprintf(stderr, "%s: File '%s' is not a socket!\n", __func__,
+ filename);
+ return -1;
+ }
+ // make a new socket
+ if ((sfd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) {
+ if (verbose >= 2)
+ fprintf(stderr, "%s: socket: %s\n", __func__, strerror(errno));
+ return -1;
+ }
+ // and connect to 'filename'
+ name.sun_family = AF_LOCAL;
+ strncpy(name.sun_path, filename, sizeof(name.sun_path));
+ name.sun_path[sizeof(name.sun_path) - 1] = 0;
+
+ size = (offsetof(struct sockaddr_un, sun_path)
+ + strlen(name.sun_path) + 1);
+
+ if (connect(sfd, (struct sockaddr *) &name, size) < 0) {
+ close(sfd);
+ if (verbose >= 2)
+ fprintf(stderr, "%s: connect: %s\n", __func__,
+ strerror(errno));
+ return -1;
+ }
+
+ return sfd;
}
int create_socket(uint16_t port)
{
- int sfd = -1;
- int yes = 1;
- struct sockaddr_in saddr;
-
- if ( 0 > ( sfd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) ) ) {
- perror("socket()");
- return -1;
- }
-
- if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
- perror("setsockopt()");
- close(sfd);
- return -1;
- }
-
- memset((void *)&saddr, 0, sizeof(saddr));
- saddr.sin_family = AF_INET;
- saddr.sin_addr.s_addr = htonl(INADDR_ANY);
- saddr.sin_port = htons(port);
-
- if(0 > bind(sfd, (struct sockaddr *)&saddr , sizeof(saddr))) {
- perror("bind()");
- close(sfd);
- return -1;
- }
-
- if (listen(sfd, 1) == -1) {
- perror("listen()");
- close(sfd);
- return -1;
- }
-
- return sfd;
+ int sfd = -1;
+ int yes = 1;
+ struct sockaddr_in saddr;
+
+ if (0 > (sfd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP))) {
+ perror("socket()");
+ return -1;
+ }
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
+ perror("setsockopt()");
+ close(sfd);
+ return -1;
+ }
+
+ memset((void *) &saddr, 0, sizeof(saddr));
+ saddr.sin_family = AF_INET;
+ saddr.sin_addr.s_addr = htonl(INADDR_ANY);
+ saddr.sin_port = htons(port);
+
+ if (0 > bind(sfd, (struct sockaddr *) &saddr, sizeof(saddr))) {
+ perror("bind()");
+ close(sfd);
+ return -1;
+ }
+
+ if (listen(sfd, 1) == -1) {
+ perror("listen()");
+ close(sfd);
+ return -1;
+ }
+
+ return sfd;
}
int connect_socket(const char *addr, uint16_t port)
{
- int sfd = -1;
- int yes = 1;
- struct hostent *hp;
- struct sockaddr_in saddr;
-
- if (!addr) {
- errno = EINVAL;
- return -1;
- }
-
- if ((hp = gethostbyname(addr)) == NULL) {
- if (verbose >= 2) fprintf(stderr, "%s: unknown host '%s'\n", __func__, addr);
- return -1;
- }
-
- if (!hp->h_addr) {
- if (verbose >= 2) fprintf(stderr, "%s: gethostbyname returned NULL address!\n", __func__);
- return -1;
- }
-
- if ( 0 > ( sfd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) ) ) {
- perror("socket()");
- return -1;
- }
-
- if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
- perror("setsockopt()");
- close(sfd);
- return -1;
- }
-
- memset((void *)&saddr, 0, sizeof(saddr));
- saddr.sin_family = AF_INET;
- saddr.sin_addr.s_addr = *(uint32_t*)hp->h_addr;
- saddr.sin_port = htons(port);
-
- if (connect(sfd, (struct sockaddr*)&saddr, sizeof(saddr)) < 0) {
- perror("connect");
- close(sfd);
- return -2;
- }
-
- return sfd;
+ int sfd = -1;
+ int yes = 1;
+ struct hostent *hp;
+ struct sockaddr_in saddr;
+
+ if (!addr) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if ((hp = gethostbyname(addr)) == NULL) {
+ if (verbose >= 2)
+ fprintf(stderr, "%s: unknown host '%s'\n", __func__, addr);
+ return -1;
+ }
+
+ if (!hp->h_addr) {
+ if (verbose >= 2)
+ fprintf(stderr, "%s: gethostbyname returned NULL address!\n",
+ __func__);
+ return -1;
+ }
+
+ if (0 > (sfd = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP))) {
+ perror("socket()");
+ return -1;
+ }
+
+ if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
+ perror("setsockopt()");
+ close(sfd);
+ return -1;
+ }
+
+ memset((void *) &saddr, 0, sizeof(saddr));
+ saddr.sin_family = AF_INET;
+ saddr.sin_addr.s_addr = *(uint32_t *) hp->h_addr;
+ saddr.sin_port = htons(port);
+
+ if (connect(sfd, (struct sockaddr *) &saddr, sizeof(saddr)) < 0) {
+ perror("connect");
+ close(sfd);
+ return -2;
+ }
+
+ return sfd;
}
int check_fd(int fd, fd_mode fdm, unsigned int timeout)
{
- fd_set fds;
- int sret;
- int eagain;
- struct timeval to;
-
- if (fd <= 0) {
- if (verbose >= 2) fprintf(stderr, "ERROR: invalid fd in check_fd %d\n", fd);
- return -1;
- }
-
- FD_ZERO(&fds);
- FD_SET(fd, &fds);
-
- to.tv_sec = (time_t)(timeout/1000);
- to.tv_usec = (time_t)((timeout-(to.tv_sec*1000))*1000);
-
- sret = -1;
-
- do {
- eagain = 0;
- switch(fdm) {
- case FD_READ:
- sret = select(fd+1,&fds,NULL,NULL,&to);
- break;
- case FD_WRITE:
- sret = select(fd+1,NULL,&fds,NULL,&to);
- break;
- case FD_EXCEPT:
- sret = select(fd+1,NULL,NULL,&fds,&to);
- break;
- default:
+ fd_set fds;
+ int sret;
+ int eagain;
+ struct timeval to;
+
+ if (fd <= 0) {
+ if (verbose >= 2)
+ fprintf(stderr, "ERROR: invalid fd in check_fd %d\n", fd);
return -1;
}
-
- if (sret < 0) {
- switch(errno) {
- case EINTR:
- // interrupt signal in select
- if (verbose >= 2) fprintf(stderr, "%s: EINTR\n", __func__);
- eagain = 1;
- break;
- case EAGAIN:
- if (verbose >= 2) fprintf(stderr, "%s: EAGAIN\n", __func__);
- break;
- default:
- if (verbose >= 2) fprintf(stderr, "%s: select failed: %s\n", __func__, strerror(errno));
- return -1;
- }
- }
- } while (eagain);
- return sret;
+ FD_ZERO(&fds);
+ FD_SET(fd, &fds);
+
+ to.tv_sec = (time_t) (timeout / 1000);
+ to.tv_usec = (time_t) ((timeout - (to.tv_sec * 1000)) * 1000);
+
+ sret = -1;
+
+ do {
+ eagain = 0;
+ switch (fdm) {
+ case FD_READ:
+ sret = select(fd + 1, &fds, NULL, NULL, &to);
+ break;
+ case FD_WRITE:
+ sret = select(fd + 1, NULL, &fds, NULL, &to);
+ break;
+ case FD_EXCEPT:
+ sret = select(fd + 1, NULL, NULL, &fds, &to);
+ break;
+ default:
+ return -1;
+ }
+
+ if (sret < 0) {
+ switch (errno) {
+ case EINTR:
+ // interrupt signal in select
+ if (verbose >= 2)
+ fprintf(stderr, "%s: EINTR\n", __func__);
+ eagain = 1;
+ break;
+ case EAGAIN:
+ if (verbose >= 2)
+ fprintf(stderr, "%s: EAGAIN\n", __func__);
+ break;
+ default:
+ if (verbose >= 2)
+ fprintf(stderr, "%s: select failed: %s\n", __func__,
+ strerror(errno));
+ return -1;
+ }
+ }
+ } while (eagain);
+
+ return sret;
}
int recv_buf(int fd, void *data, size_t length)
{
- return recv_buf_timeout(fd, data, length, 0, RECV_TIMEOUT);
+ return recv_buf_timeout(fd, data, length, 0, RECV_TIMEOUT);
}
int peek_buf(int fd, void *data, size_t length)
{
- return recv_buf_timeout(fd, data, length, MSG_PEEK, RECV_TIMEOUT);
+ return recv_buf_timeout(fd, data, length, MSG_PEEK, RECV_TIMEOUT);
}
-int recv_buf_timeout(int fd, void *data, size_t length, int flags, unsigned int timeout)
+int recv_buf_timeout(int fd, void *data, size_t length, int flags,
+ unsigned int timeout)
{
- int res;
- int result;
-
- // check if data is available
- res = check_fd(fd, FD_READ, timeout);
- if (res <= 0) {
- return res;
- }
-
- // if we get here, there _is_ data available
- result = recv(fd, data, length, flags);
- if (res > 0 && result == 0) {
- // but this is an error condition
- if (verbose >= 3) fprintf(stderr, "%s: fd=%d recv returned 0\n", __func__, fd);
- return -1;
- }
- return result;
+ int res;
+ int result;
+
+ // check if data is available
+ res = check_fd(fd, FD_READ, timeout);
+ if (res <= 0) {
+ return res;
+ }
+ // if we get here, there _is_ data available
+ result = recv(fd, data, length, flags);
+ if (res > 0 && result == 0) {
+ // but this is an error condition
+ if (verbose >= 3)
+ fprintf(stderr, "%s: fd=%d recv returned 0\n", __func__, fd);
+ return -1;
+ }
+ return result;
}
int send_buf(int fd, void *data, size_t length)
{
- return send(fd, data, length, 0);
+ return send(fd, data, length, 0);
}
-
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