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authorGravatar Nikias Bassen2023-12-26 14:52:37 +0100
committerGravatar Nikias Bassen2023-12-26 14:52:37 +0100
commit2d517ebcebe326e79186e41ee7bbd1cf5ed1f2b9 (patch)
tree6eec6f9d0a9dc3ea42a2400d85ea94b8017d541c /src/socket.c
parentbbc3c4e58f7991495e885b38a03fd20abecd4583 (diff)
downloadlibimobiledevice-glue-2d517ebcebe326e79186e41ee7bbd1cf5ed1f2b9.tar.gz
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socket: Conditionally compile using poll or select based on availability
Diffstat (limited to 'src/socket.c')
-rw-r--r--src/socket.c112
1 files changed, 85 insertions, 27 deletions
diff --git a/src/socket.c b/src/socket.c
index 49a5ef4..c2ebf25 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -65,7 +65,9 @@ static int wsa_init = 0;
#endif
#include "common.h"
#include "libimobiledevice-glue/socket.h"
+#ifdef HAVE_POLL
#include <sys/poll.h>
+#endif
#define RECV_TIMEOUT 20000
#define SEND_TIMEOUT 10000
@@ -148,9 +150,10 @@ enum poll_status
poll_status_error
};
-// timeoutMilliseconds of -1 means infinity
-static enum poll_status poll_wrapper(int fd, fd_mode mode, int timeoutMilliseconds)
+// timeout of -1 means infinity
+static inline __attribute__((always_inline)) enum poll_status poll_wrapper(int fd, fd_mode mode, int timeout)
{
+#ifdef HAVE_POLL
// https://man7.org/linux/man-pages/man2/select.2.html
// Correspondence between select() and poll() notifications
// #define POLLIN_SET (EPOLLRDNORM | EPOLLRDBAND | EPOLLIN |
@@ -163,8 +166,7 @@ static enum poll_status poll_wrapper(int fd, fd_mode mode, int timeoutMillisecon
// /* Exceptional condition */
short events;
- switch(mode)
- {
+ switch (mode) {
case FDM_READ:
events = POLLRDNORM | POLLRDBAND | POLLIN | POLLHUP | POLLERR;
break;
@@ -179,20 +181,17 @@ static enum poll_status poll_wrapper(int fd, fd_mode mode, int timeoutMillisecon
fprintf(stderr, "%s: fd_mode %d unsupported\n", __func__, mode);
return poll_status_error;
}
- while(1)
- {
+ while (1) {
struct pollfd pfd = {
.fd = fd,
.events = events,
};
- switch(poll(&pfd, 1, timeoutMilliseconds))
- {
+ switch (poll(&pfd, 1, timeout)) {
case 1:
if((pfd.revents & (POLLNVAL | POLLERR)) != 0)
{
if (verbose >= 2)
- fprintf(stderr, "%s: poll unexpected events: %d\n", __func__,
- (int)pfd.revents);
+ fprintf(stderr, "%s: poll unexpected events: %d\n", __func__, (int)pfd.revents);
return poll_status_error;
}
return poll_status_success;
@@ -208,11 +207,73 @@ static enum poll_status poll_wrapper(int fd, fd_mode mode, int timeoutMillisecon
// fallthrough
default:
if (verbose >= 2)
- fprintf(stderr, "%s: poll failed: %s\n", __func__,
- strerror(errno));
+ fprintf(stderr, "%s: poll failed: %s\n", __func__, strerror(errno));
return poll_status_error;
}
}
+#else
+ fd_set fds;
+ int sret;
+ int eagain;
+ struct timeval to;
+ struct timeval *pto;
+
+ FD_ZERO(&fds);
+ FD_SET(fd, &fds);
+
+ sret = poll_status_error;
+
+ do {
+ 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;
+ }
+ eagain = 0;
+ switch (mode) {
+ 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:
+ if (verbose >= 2)
+ fprintf(stderr, "%s: fd_mode %d unsupported\n", __func__, mode);
+ return poll_status_error;
+ }
+
+ if (sret == 1) {
+ return poll_status_success;
+ } else if (sret == 0) {
+ return poll_status_timeout;
+ } else {
+ 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 poll_status_error;
+ }
+ }
+ } while (eagain);
+
+ return sret;
+#endif
}
#ifndef WIN32
@@ -321,7 +382,7 @@ LIBIMOBILEDEVICE_GLUE_API int socket_connect_unix(const char *filename)
break;
}
if (errno == EINPROGRESS) {
- if(poll_wrapper(sfd, FDM_WRITE, CONNECT_TIMEOUT) == poll_status_success) {
+ if (poll_wrapper(sfd, FDM_WRITE, CONNECT_TIMEOUT) == poll_status_success) {
int so_error;
socklen_t len = sizeof(so_error);
getsockopt(sfd, SOL_SOCKET, SO_ERROR, (void*)&so_error, &len);
@@ -998,7 +1059,7 @@ LIBIMOBILEDEVICE_GLUE_API int socket_connect_addr(struct sockaddr* addr, uint16_
if (errno == EINPROGRESS)
#endif
{
- if(poll_wrapper(sfd, FDM_WRITE, CONNECT_TIMEOUT) == poll_status_success) {
+ if (poll_wrapper(sfd, FDM_WRITE, CONNECT_TIMEOUT) == poll_status_success) {
int so_error;
socklen_t len = sizeof(so_error);
getsockopt(sfd, SOL_SOCKET, SO_ERROR, (void*)&so_error, &len);
@@ -1115,7 +1176,7 @@ LIBIMOBILEDEVICE_GLUE_API int socket_connect(const char *addr, uint16_t port)
if (errno == EINPROGRESS)
#endif
{
- if(poll_wrapper(sfd, FDM_WRITE, CONNECT_TIMEOUT) == poll_status_success) {
+ if (poll_wrapper(sfd, FDM_WRITE, CONNECT_TIMEOUT) == poll_status_success) {
int so_error;
socklen_t len = sizeof(so_error);
getsockopt(sfd, SOL_SOCKET, SO_ERROR, (void*)&so_error, &len);
@@ -1158,25 +1219,22 @@ LIBIMOBILEDEVICE_GLUE_API int socket_check_fd(int fd, fd_mode fdm, unsigned int
return -1;
}
- int timeoutMilliseconds;
- if(timeout > 0)
- {
- timeoutMilliseconds = (int)timeout;
- if(timeoutMilliseconds <= 0)
- timeoutMilliseconds = -1;
- }
- else
- {
- timeoutMilliseconds = -1;
+ int timeout_ms;
+ if (timeout > 0) {
+ timeout_ms = (int)timeout;
+ if (timeout_ms <= 0)
+ timeout_ms = -1;
+ } else {
+ timeout_ms = -1;
}
- switch(poll_wrapper(fd, fdm, timeoutMilliseconds))
- {
+ switch (poll_wrapper(fd, fdm, timeout_ms)) {
case poll_status_success:
return 1;
case poll_status_timeout:
return -ETIMEDOUT;
case poll_status_error:
+ default:
if (verbose >= 2)
fprintf(stderr, "%s: poll_wrapper failed\n", __func__);
return -1;