diff options
Diffstat (limited to 'CAN-binder/libs/nanopb/examples/network_server/server.c')
-rw-r--r-- | CAN-binder/libs/nanopb/examples/network_server/server.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/CAN-binder/libs/nanopb/examples/network_server/server.c b/CAN-binder/libs/nanopb/examples/network_server/server.c deleted file mode 100644 index 46a5f38..0000000 --- a/CAN-binder/libs/nanopb/examples/network_server/server.c +++ /dev/null @@ -1,158 +0,0 @@ -/* This is a simple TCP server that listens on port 1234 and provides lists - * of files to clients, using a protocol defined in file_server.proto. - * - * It directly deserializes and serializes messages from network, minimizing - * memory use. - * - * For flexibility, this example is implemented using posix api. - * In a real embedded system you would typically use some other kind of - * a communication and filesystem layer. - */ - -#include <sys/socket.h> -#include <sys/types.h> -#include <netinet/in.h> -#include <unistd.h> -#include <dirent.h> -#include <stdio.h> -#include <string.h> - -#include <pb_encode.h> -#include <pb_decode.h> - -#include "fileproto.pb.h" -#include "common.h" - -/* This callback function will be called once during the encoding. - * It will write out any number of FileInfo entries, without consuming unnecessary memory. - * This is accomplished by fetching the filenames one at a time and encoding them - * immediately. - */ -bool listdir_callback(pb_ostream_t *stream, const pb_field_t *field, void * const *arg) -{ - DIR *dir = (DIR*) *arg; - struct dirent *file; - FileInfo fileinfo = {}; - - while ((file = readdir(dir)) != NULL) - { - fileinfo.inode = file->d_ino; - strncpy(fileinfo.name, file->d_name, sizeof(fileinfo.name)); - fileinfo.name[sizeof(fileinfo.name) - 1] = '\0'; - - /* This encodes the header for the field, based on the constant info - * from pb_field_t. */ - if (!pb_encode_tag_for_field(stream, field)) - return false; - - /* This encodes the data for the field, based on our FileInfo structure. */ - if (!pb_encode_submessage(stream, FileInfo_fields, &fileinfo)) - return false; - } - - return true; -} - -/* Handle one arriving client connection. - * Clients are expected to send a ListFilesRequest, terminated by a '0'. - * Server will respond with a ListFilesResponse message. - */ -void handle_connection(int connfd) -{ - DIR *directory = NULL; - - /* Decode the message from the client and open the requested directory. */ - { - ListFilesRequest request = {}; - pb_istream_t input = pb_istream_from_socket(connfd); - - if (!pb_decode(&input, ListFilesRequest_fields, &request)) - { - printf("Decode failed: %s\n", PB_GET_ERROR(&input)); - return; - } - - directory = opendir(request.path); - printf("Listing directory: %s\n", request.path); - } - - /* List the files in the directory and transmit the response to client */ - { - ListFilesResponse response = {}; - pb_ostream_t output = pb_ostream_from_socket(connfd); - - if (directory == NULL) - { - perror("opendir"); - - /* Directory was not found, transmit error status */ - response.has_path_error = true; - response.path_error = true; - response.file.funcs.encode = NULL; - } - else - { - /* Directory was found, transmit filenames */ - response.has_path_error = false; - response.file.funcs.encode = &listdir_callback; - response.file.arg = directory; - } - - if (!pb_encode(&output, ListFilesResponse_fields, &response)) - { - printf("Encoding failed: %s\n", PB_GET_ERROR(&output)); - } - } - - if (directory != NULL) - closedir(directory); -} - -int main(int argc, char **argv) -{ - int listenfd, connfd; - struct sockaddr_in servaddr; - int reuse = 1; - - /* Listen on localhost:1234 for TCP connections */ - listenfd = socket(AF_INET, SOCK_STREAM, 0); - setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)); - - memset(&servaddr, 0, sizeof(servaddr)); - servaddr.sin_family = AF_INET; - servaddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); - servaddr.sin_port = htons(1234); - if (bind(listenfd, (struct sockaddr*)&servaddr, sizeof(servaddr)) != 0) - { - perror("bind"); - return 1; - } - - if (listen(listenfd, 5) != 0) - { - perror("listen"); - return 1; - } - - for(;;) - { - /* Wait for a client */ - connfd = accept(listenfd, NULL, NULL); - - if (connfd < 0) - { - perror("accept"); - return 1; - } - - printf("Got connection.\n"); - - handle_connection(connfd); - - printf("Closing connection.\n"); - - close(connfd); - } - - return 0; -} |