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Diffstat (limited to 'src/kms/kms_server.c')
-rw-r--r--src/kms/kms_server.c244
1 files changed, 0 insertions, 244 deletions
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 <asm-generic/socket.h>
-#include <stdio.h>
-#include <string.h>
-#include <errno.h>
-#include <stdlib.h>
-
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-
-#include <xf86drm.h>
-#include <xf86drmMode.h>
-
-#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 <domain_socket_path>\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;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 04:54:23 +0000