From cb82677ae8e7b3d5ef35a36b7c6d88020959864c Mon Sep 17 00:00:00 2001 From: dec05eba Date: Sun, 9 Apr 2023 15:54:29 +0200 Subject: Move kms client and server to separate directories --- src/capture/kms_vaapi.c | 2 +- src/kms/kms_client.c | 245 ------------------------------------------------ src/kms/kms_server.c | 244 ----------------------------------------------- 3 files changed, 1 insertion(+), 490 deletions(-) delete mode 100644 src/kms/kms_client.c delete mode 100644 src/kms/kms_server.c (limited to 'src') diff --git a/src/capture/kms_vaapi.c b/src/capture/kms_vaapi.c index 7e42011..2e970a3 100644 --- a/src/capture/kms_vaapi.c +++ b/src/capture/kms_vaapi.c @@ -1,5 +1,5 @@ #include "../../include/capture/kms_vaapi.h" -#include "../../include/kms/kms_client.h" +#include "../../kms/client/kms_client.h" #include "../../include/egl.h" #include "../../include/utils.h" #include diff --git a/src/kms/kms_client.c b/src/kms/kms_client.c deleted file mode 100644 index cddd8ff..0000000 --- a/src/kms/kms_client.c +++ /dev/null @@ -1,245 +0,0 @@ -#include "../../include/kms/kms_client.h" -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -static bool is_inside_flatpak(void) { - return getenv("FLATPAK_ID") != NULL; -} - -static int send_msg_to_server(int server_fd, gsr_kms_request *request) { - struct iovec iov; - iov.iov_base = request; - iov.iov_len = sizeof(*request); - - struct msghdr request_message = {0}; - request_message.msg_iov = &iov; - request_message.msg_iovlen = 1; - - return sendmsg(server_fd, &request_message, 0); -} - -static int recv_msg_from_server(int server_fd, gsr_kms_response *response) { - struct iovec iov; - iov.iov_base = response; - iov.iov_len = sizeof(*response); - - struct msghdr response_message = {0}; - response_message.msg_iov = &iov; - response_message.msg_iovlen = 1; - - char cmsgbuf[CMSG_SPACE(sizeof(int))]; - memset(cmsgbuf, 0, sizeof(cmsgbuf)); - response_message.msg_control = cmsgbuf; - response_message.msg_controllen = sizeof(cmsgbuf); - - int res = recvmsg(server_fd, &response_message, MSG_WAITALL); - if(res <= 0) - return res; - - if(response->result == KMS_RESULT_OK) - response->data.fd.fd = 0; - - struct cmsghdr *cmsg = CMSG_FIRSTHDR(&response_message); - if(cmsg) { - fprintf(stderr, "got cmsg, %d\n", cmsg->cmsg_type); - if(cmsg->cmsg_type == SCM_RIGHTS) { - int kms_fd = 0; - memcpy(&kms_fd, CMSG_DATA(cmsg), sizeof(int)); - fprintf(stderr, "kms fd: %d\n", kms_fd); - response->data.fd.fd = kms_fd; - } - } - - return res; -} - -int gsr_kms_client_init(gsr_kms_client *self, const char *card_path, const char *program_dir) { - self->kms_server_pid = -1; - self->card_path = NULL; - self->socket_fd = -1; - self->client_fd = -1; - self->socket_path[0] = '\0'; - struct sockaddr_un local_addr = {0}; - struct sockaddr_un remote_addr = {0}; - - bool inside_flatpak = is_inside_flatpak(); - char server_filepath[PATH_MAX]; - snprintf(server_filepath, sizeof(server_filepath), "%s/%s", program_dir, "gsr-kms-server"); - if(access(server_filepath, F_OK) != 0 || inside_flatpak) - snprintf(server_filepath, sizeof(server_filepath), "gsr-kms-server"); // Assume gsr-kms-server is in $PATH - - bool has_perm = 0; - if(geteuid() == 0) { - has_perm = true; - } else { - cap_t kms_server_cap = cap_get_file(server_filepath); - if(kms_server_cap) { - cap_flag_value_t res = 0; - cap_get_flag(kms_server_cap, CAP_SYS_ADMIN, CAP_PERMITTED, &res); - if(res == CAP_SET) { - //fprintf(stderr, "has permission!\n"); - has_perm = true; - } else { - //fprintf(stderr, "No permission:(\n"); - } - cap_free(kms_server_cap); - } else { - if(errno == ENODATA) - fprintf(stderr, "gsr info: gsr_kms_client_init: gsr-kms-server is missing sys_admin cap and will require root authentication. To bypass this automatically, run: sudo setcap cap_sys_admin+ep '%s'\n", server_filepath); - else - fprintf(stderr, "gsr info: gsr_kms_client_init: failed to get cap\n"); - } - } - - fprintf(stderr, "gsr info: gsr server path: %s, exists: %s\n", server_filepath, access(server_filepath, F_OK) == 0 ? "yes" : "no"); - - self->card_path = strdup(card_path); - if(!self->card_path) { - fprintf(stderr, "gsr error: gsr_kms_client_init: failed to duplicate card_path\n"); - goto err; - } - - strcpy(self->socket_path, "/tmp/gsr-kms-socket-XXXXXX"); - if(!tmpnam(self->socket_path)) { - fprintf(stderr, "gsr error: gsr_kms_client_init: mkstemp failed, error: %s\n", strerror(errno)); - goto err; - } - - self->socket_fd = socket(AF_UNIX, SOCK_STREAM, 0); - if(self->socket_fd == -1) { - fprintf(stderr, "gsr error: gsr_kms_client_init: socket failed, error: %s\n", strerror(errno)); - goto err; - } - - local_addr.sun_family = AF_UNIX; - strncpy(local_addr.sun_path, self->socket_path, sizeof(local_addr.sun_path)); - if(bind(self->socket_fd, (struct sockaddr*)&local_addr, sizeof(local_addr.sun_family) + strlen(local_addr.sun_path)) == -1) { - fprintf(stderr, "gsr error: gsr_kms_client_init: failed to bind socket, error: %s\n", strerror(errno)); - goto err; - } - - if(listen(self->socket_fd, 1) == -1) { - fprintf(stderr, "gsr error: gsr_kms_client_init: failed to listen on socket, error: %s\n", strerror(errno)); - goto err; - } - - pid_t pid = fork(); - if(pid == -1) { - fprintf(stderr, "gsr error: gsr_kms_client_init: fork failed, error: %s\n", strerror(errno)); - goto err; - } else if(pid == 0) { /* child */ - if(has_perm) { - const char *args[] = { server_filepath, self->socket_path, NULL }; - execvp(args[0], (char *const*)args); - } else if(inside_flatpak) { - const char *args[] = { "flatpak-spawn", "--host", "pkexec", server_filepath, self->socket_path, NULL }; - execvp(args[0], (char *const*)args); - } else { - const char *args[] = { "pkexec", server_filepath, self->socket_path, NULL }; - execvp(args[0], (char *const*)args); - } - perror("execvp"); - _exit(127); - } else { /* parent */ - self->kms_server_pid = pid; - } - - fprintf(stderr, "gsr info: gsr_kms_client_init: waiting for client to connect\n"); - for(;;) { - struct timeval tv; - fd_set rfds; - FD_ZERO(&rfds); - FD_SET(self->socket_fd, &rfds); - - tv.tv_sec = 0; - tv.tv_usec = 100 * 1000; // 100 ms - - int select_res = select(1 + self->socket_fd, &rfds, NULL, NULL, &tv); - if(select_res > 0) { - socklen_t sock_len = 0; - self->client_fd = accept(self->socket_fd, (struct sockaddr*)&remote_addr, &sock_len); - if(self->client_fd == -1) { - fprintf(stderr, "gsr error: gsr_kms_client_init: accept failed on socket, error: %s\n", strerror(errno)); - goto err; - } - break; - } else { - int status; - int wait_result = waitpid(self->kms_server_pid, &status, WNOHANG); - if(wait_result != 0) { - fprintf(stderr, "gsr error: gsr_kms_client_init: kms server died or never started, error: %s\n", strerror(errno)); - goto err; - } - } - } - fprintf(stderr, "gsr info: gsr_kms_client_init: client connected\n"); - - return 0; - - err: - gsr_kms_client_deinit(self); - return -1; -} - -void gsr_kms_client_deinit(gsr_kms_client *self) { - if(self->card_path) { - free(self->card_path); - self->card_path = NULL; - } - - if(self->client_fd != -1) { - close(self->client_fd); - self->client_fd = -1; - } - - if(self->socket_fd != -1) { - close(self->socket_fd); - self->socket_fd = -1; - } - - if(self->kms_server_pid != -1) { - kill(self->kms_server_pid, SIGINT); - int status; - waitpid(self->kms_server_pid, &status, 0); - self->kms_server_pid = -1; - } - - if(self->socket_path[0] != '\0') { - remove(self->socket_path); - self->socket_path[0] = '\0'; - } -} - -int gsr_kms_client_get_kms(gsr_kms_client *self, gsr_kms_response *response) { - response->result = KMS_RESULT_FAILED_TO_SEND; - strcpy(response->data.err_msg, "failed to send"); - - gsr_kms_request request; - request.type = KMS_REQUEST_TYPE_GET_KMS; - strcpy(request.data.card_path, self->card_path); - if(send_msg_to_server(self->client_fd, &request) == -1) { - fprintf(stderr, "gsr error: gsr_kms_client_get_kms: failed to send request message to server\n"); - return -1; - } - - const int recv_res = recv_msg_from_server(self->client_fd, response); - if(recv_res == 0) { - fprintf(stderr, "gsr warning: gsr_kms_client_get_kms: kms server shut down\n"); - return -1; - } else if(recv_res == -1) { - fprintf(stderr, "gsr error: gsr_kms_client_get_kms: failed to receive response\n"); - return -1; - } - - return 0; -} diff --git a/src/kms/kms_server.c b/src/kms/kms_server.c deleted file mode 100644 index e7ee02f..0000000 --- a/src/kms/kms_server.c +++ /dev/null @@ -1,244 +0,0 @@ -#include "../../include/kms/kms_shared.h" - -#include -#include -#include -#include -#include - -#include -#include -#include -#include - -#include -#include - -#define DRM_CLIENT_CAP_UNIVERSAL_PLANES 2 - -static int max_int(int a, int b) { - return a > b ? a : b; -} - -static int send_msg_to_client(int client_fd, gsr_kms_response *response, int *fds, int num_fds) { - struct iovec iov; - iov.iov_base = response; - iov.iov_len = sizeof(*response); - - struct msghdr response_message = {0}; - response_message.msg_iov = &iov; - response_message.msg_iovlen = 1; - - char cmsgbuf[CMSG_SPACE(sizeof(int)) * max_int(1, num_fds)]; - memset(cmsgbuf, 0, sizeof(cmsgbuf)); - - if(num_fds > 0) { - response_message.msg_control = cmsgbuf; - response_message.msg_controllen = sizeof(cmsgbuf); - - int total_msg_len = 0; - struct cmsghdr *cmsg = NULL; - for(int i = 0; i < num_fds; ++i) { - if(i == 0) - cmsg = CMSG_FIRSTHDR(&response_message); - else - cmsg = CMSG_NXTHDR(&response_message, cmsg); - - cmsg->cmsg_level = SOL_SOCKET; - cmsg->cmsg_type = SCM_RIGHTS; - cmsg->cmsg_len = CMSG_LEN(sizeof(int)); - memcpy(CMSG_DATA(cmsg), &fds[i], sizeof(int)); - total_msg_len += cmsg->cmsg_len; - } - - response_message.msg_controllen = total_msg_len; - } - - return sendmsg(client_fd, &response_message, 0); -} - -static int get_kms(const char *card_path, gsr_kms_response *response) { - response->result = KMS_RESULT_OK; - response->data.fd.fd = 0; - response->data.fd.width = 0; - response->data.fd.height = 0; - - const int drmfd = open(card_path, O_RDONLY); - if (drmfd < 0) { - response->result = KMS_RESULT_FAILED_TO_OPEN_CARD; - snprintf(response->data.err_msg, sizeof(response->data.err_msg), "failed to open %s, error: %s", card_path, strerror(errno)); - return -1; - } - - if (0 != drmSetClientCap(drmfd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1)) { - response->result = KMS_RESULT_INSUFFICIENT_PERMISSIONS; - snprintf(response->data.err_msg, sizeof(response->data.err_msg), "drmSetClientCap failed, error: %s", strerror(errno)); - close(drmfd); - return -1; - } - - drmModePlaneResPtr planes = drmModeGetPlaneResources(drmfd); - if (!planes) { - response->result = KMS_RESULT_FAILED_TO_GET_KMS; - snprintf(response->data.err_msg, sizeof(response->data.err_msg), "failed to access planes, error: %s", strerror(errno)); - close(drmfd); - return -1; - } - - fprintf(stderr, "DRM planes %d:\n", planes->count_planes); - for (uint32_t i = 0; i < planes->count_planes; ++i) { - drmModePlanePtr plane = drmModeGetPlane(drmfd, planes->planes[i]); - if (!plane) { - fprintf(stderr, "Cannot get drmModePlanePtr for plane %#x: %s (%d)\n", planes->planes[i], strerror(errno), errno); - continue; - } - - fprintf(stderr, "\t%d: fb_id=%#x\n", i, plane->fb_id); - - if (!plane->fb_id) - goto plane_continue; - - drmModeFB2Ptr drmfb = drmModeGetFB2(drmfd, plane->fb_id); - if (!drmfb) { - fprintf(stderr, "Cannot get drmModeFBPtr for fb %#x: %s (%d)\n", plane->fb_id, strerror(errno), errno); - } else { - if (!drmfb->handles[0]) { - fprintf(stderr, "\t\tFB handle for fb %#x is NULL\n", plane->fb_id); - fprintf(stderr, "\t\tPossible reason: not permitted to get FB handles. Do `sudo setcap cap_sys_admin+ep`\n"); - } else { - int fb_fd = -1; - const int ret = drmPrimeHandleToFD(drmfd, drmfb->handles[0], 0, &fb_fd); - if (ret != 0 || fb_fd == -1) { - fprintf(stderr, "Cannot get fd for fb %#x handle %#x: %s (%d)\n", plane->fb_id, drmfb->handles[0], strerror(errno), errno); - } else if(drmfb->width * drmfb->height > response->data.fd.width * response->data.fd.height) { - if(response->data.fd.fd != 0) { - close(response->data.fd.fd); - response->data.fd.fd = 0; - } - - response->data.fd.fd = fb_fd; - response->data.fd.width = drmfb->width; - response->data.fd.height = drmfb->height; - response->data.fd.pitch = drmfb->pitches[0]; - response->data.fd.offset = drmfb->offsets[0]; - response->data.fd.pixel_format = drmfb->pixel_format; - response->data.fd.modifier = drmfb->modifier; - fprintf(stderr, "kms width: %u, height: %u, pixel format: %u, modifier: %lu\n", response->data.fd.width, response->data.fd.height, response->data.fd.pixel_format, response->data.fd.modifier); - } else { - close(fb_fd); - } - } - drmModeFreeFB2(drmfb); - } - - plane_continue: - drmModeFreePlane(plane); - } - - drmModeFreePlaneResources(planes); - close(drmfd); - - if(response->data.fd.fd == 0) { - response->result = KMS_RESULT_NO_KMS_AVAILABLE; - snprintf(response->data.err_msg, sizeof(response->data.err_msg), "no kms found"); - return -1; - } - - return 0; -} - -int main(int argc, char **argv) { - if(argc != 2) { - fprintf(stderr, "usage: kms_server \n"); - return 1; - } - - const char *domain_socket_path = argv[1]; - int socket_fd = socket(AF_UNIX, SOCK_STREAM, 0); - if(socket_fd == -1) { - fprintf(stderr, "kms server error: failed to create socket, error: %s\n", strerror(errno)); - return 2; - } - - fprintf(stderr, "kms server info: connecting to the server\n"); - for(;;) { - struct sockaddr_un remote_addr = {0}; - remote_addr.sun_family = AF_UNIX; - strncpy(remote_addr.sun_path, domain_socket_path, sizeof(remote_addr.sun_path)); - // TODO: Check if parent disconnected - if(connect(socket_fd, (struct sockaddr*)&remote_addr, sizeof(remote_addr.sun_family) + strlen(remote_addr.sun_path)) == -1) { - if(errno == ECONNREFUSED || errno == ENOENT) - continue; // Host not ready yet? TODO: sleep - if(errno == EISCONN) // TODO? - break; - fprintf(stderr, "kms server error: connect failed, error: %s (%d)\n", strerror(errno), errno); - return 2; - } - } - fprintf(stderr, "kms server info: connected to the server\n"); - - int res = 0; - for(;;) { - gsr_kms_request request; - struct iovec iov; - iov.iov_base = &request; - iov.iov_len = sizeof(request); - - struct msghdr request_message = {0}; - request_message.msg_iov = &iov; - request_message.msg_iovlen = 1; - const int recv_res = recvmsg(socket_fd, &request_message, MSG_WAITALL); - if(recv_res == 0) { - fprintf(stderr, "kms server info: kms client shutdown, shutting down the server\n"); - res = 3; - goto done; - } else if(recv_res == -1) { - const int err = errno; - fprintf(stderr, "kms server error: failed to read all data in client request (error: %s), ignoring\n", strerror(err)); - if(err == EBADF) { - fprintf(stderr, "kms server error: invalid client fd, shutting down the server\n"); - res = 3; - goto done; - } - continue; - } - request.data.card_path[254] = '\0'; - - switch(request.type) { - case KMS_REQUEST_TYPE_GET_KMS: { - gsr_kms_response response; - int kms_fd = 0; - if (get_kms(request.data.card_path, &response) == 0) { - kms_fd = response.data.fd.fd; - } - - if(send_msg_to_client(socket_fd, &response, &kms_fd, kms_fd == 0 ? 0 : 1) == -1) { - fprintf(stderr, "kms server error: failed to respond to client KMS_REQUEST_TYPE_GET_KMS request\n"); - if(kms_fd != 0) - close(kms_fd); - break; - } - - if(kms_fd != 0) - close(kms_fd); - - break; - } - default: { - gsr_kms_response response; - response.result = KMS_RESULT_INVALID_REQUEST; - snprintf(response.data.err_msg, sizeof(response.data.err_msg), "invalid request type %d, expected %d (%s)", request.type, KMS_REQUEST_TYPE_GET_KMS, "KMS_REQUEST_TYPE_GET_KMS"); - fprintf(stderr, "%s\n", response.data.err_msg); - if(send_msg_to_client(socket_fd, &response, NULL, 0) == -1) { - fprintf(stderr, "kms server error: failed to respond to client request\n"); - break; - } - break; - } - } - } - - done: - close(socket_fd); - return res; -} -- cgit v1.2.3