Move kms client and server to separate directories

2 files changed, 0 insertions, 489 deletions

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 <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <unistd.h>
-#include <signal.h>
-#include <limits.h>
-#include <stdbool.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/wait.h>
-#include <sys/capability.h>
-
-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 <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;
-}