From c45ae1f6b6f53995a5bc99591688102d11ad2148 Mon Sep 17 00:00:00 2001 From: Nikias Bassen Date: Tue, 17 Sep 2013 11:00:31 +0200 Subject: initial commit of adapted source tree. --- src/sock_stuff.c | 375 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 375 insertions(+) create mode 100644 src/sock_stuff.c (limited to 'src/sock_stuff.c') diff --git a/src/sock_stuff.c b/src/sock_stuff.c new file mode 100644 index 0000000..609c8ad --- /dev/null +++ b/src/sock_stuff.c @@ -0,0 +1,375 @@ +/* + libusbmuxd - client library to talk to usbmuxd + +Copyright (C) 2009 Nikias Bassen +Copyright (C) 2009 Paul Sladen +Copyright (C) 2009 Martin Szulecki + +This library is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as +published by the Free Software Foundation, either version 2.1 of the +License, or (at your option) any later version. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this program; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + +*/ + +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef WIN32 +#include +#include +static int wsa_init = 0; +#else +#include +#include +#include +#include +#include +#endif +#include "sock_stuff.h" + +#define RECV_TIMEOUT 20000 + +static int verbose = 0; + +void sock_stuff_set_verbose(int level) +{ + verbose = level; +} + +#ifndef WIN32 +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_socket(sock); + return -1; + } + + if (listen(sock, 10) < 0) { + perror("listen"); + close_socket(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_socket(sfd); + if (verbose >= 2) + fprintf(stderr, "%s: connect: %s\n", __func__, + strerror(errno)); + return -1; + } + + return sfd; +} +#endif + +int create_socket(uint16_t port) +{ + int sfd = -1; + int yes = 1; +#ifdef WIN32 + WSADATA wsa_data; + if (!wsa_init) { + if (WSAStartup(MAKEWORD(2,2), &wsa_data) != ERROR_SUCCESS) { + fprintf(stderr, "WSAStartup failed!\n"); + ExitProcess(-1); + } + wsa_init = 1; + } +#endif + 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, (void*)&yes, sizeof(int)) == -1) { + perror("setsockopt()"); + close_socket(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_socket(sfd); + return -1; + } + + if (listen(sfd, 1) == -1) { + perror("listen()"); + close_socket(sfd); + return -1; + } + + return sfd; +} + +#if defined(WIN32) || defined(__CYGWIN__) +int connect_socket(const char *addr, uint16_t port) +{ + int sfd = -1; + int yes = 1; + struct hostent *hp; + struct sockaddr_in saddr; +#ifdef WIN32 + WSADATA wsa_data; + if (!wsa_init) { + if (WSAStartup(MAKEWORD(2,2), &wsa_data) != ERROR_SUCCESS) { + fprintf(stderr, "WSAStartup failed!\n"); + ExitProcess(-1); + } + wsa_init = 1; + } +#endif + + 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, (void*)&yes, sizeof(int)) == -1) { + perror("setsockopt()"); + close_socket(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_socket(sfd); + return -2; + } + + return sfd; +} +#endif /* WIN32 || __CYGWIN__ */ + +int check_fd(int fd, fd_mode fdm, unsigned int timeout) +{ + fd_set fds; + int sret; + int eagain; + struct timeval to; + struct timeval *pto; + + 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); + + if (timeout > 0) { + to.tv_sec = (time_t) (timeout / 1000); + to.tv_usec = (time_t) ((timeout - (to.tv_sec * 1000)) * 1000); + pto = &to; + } else { + pto = NULL; + } + + sret = -1; + + do { + eagain = 0; + switch (fdm) { + case FDM_READ: + sret = select(fd + 1, &fds, NULL, NULL, pto); + break; + case FDM_WRITE: + sret = select(fd + 1, NULL, &fds, NULL, pto); + break; + case FDM_EXCEPT: + sret = select(fd + 1, NULL, NULL, &fds, pto); + 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 shutdown_socket(int fd, int how) +{ + return shutdown(fd, how); +} + +int close_socket(int fd) { +#ifdef WIN32 + return closesocket(fd); +#else + return close(fd); +#endif +} + +int recv_buf(int fd, void *data, size_t length) +{ + 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); +} + +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, FDM_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 -EAGAIN; + } + if (result < 0) { + return -errno; + } + return result; +} + +int send_buf(int fd, void *data, size_t length) +{ + return send(fd, data, length, 0); +} -- cgit v1.1-32-gdbae