Update php version in Makefile

.gitignore

@@ -1,8 +1,10 @@
 *
 !src
 !src/**
-!docs
-!docs/**
+!doc
+!doc/**
+!test
+!test/**
 !Makefile
 !.gitignore
 !README.md

Makefile

@@ -1,26 +1,85 @@
 
 CC=gcc
-CFLAGS=-std=gnu11 -Wall -Wno-unused-but-set-variable
-LIBS=-lssl -lcrypto -lmagic -lz -lmaxminddb -lbrotlienc
+CFLAGS=-std=gnu11 -Wno-unused-but-set-variable -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_SVID_SOURCE -D_POSIX_C_SOURCE=200809L
+LDFLAGS=-lssl -lcrypto -lmagic -lz -lmaxminddb -lbrotlienc
 
-DEBIAN_OPTS=-D CACHE_MAGIC_FILE="\"/usr/share/file/magic.mgc\"" -D PHP_FPM_SOCKET="\"/var/run/php/php7.4-fpm.sock\""
+DEBIAN_OPTS=-D CACHE_MAGIC_FILE="\"/usr/share/file/magic.mgc\"" -D PHP_FPM_SOCKET="\"/var/run/php/php8.2-fpm.sock\""
+
+.PHONY: all prod debug default debian permit clean test
+all: prod
+default: bin bin/lib bin/sesimos
+
+prod: CFLAGS += -O3
+prod: default
+
+debug: CFLAGS += -Wall -pedantic
+debug: default
+
+debian: CFLAGS += $(DEBIAN_OPTS)
+debian: prod
+
+test: CFLAGS += -include test/mock_*.h
+test: bin bin/test
+	bin/test
+
+
+bin:
+	mkdir -p bin
+
+bin/lib:
+	mkdir -p bin/lib
+
+
+bin/test: test/mock_*.c test/test_*.c src/lib/utils.c src/lib/sock.c
+	$(CC) -o $@ $(CFLAGS) $^ -lcriterion
+
+
+bin/%.o: src/%.c
+	$(CC) -c -o $@ $(CFLAGS) $<
+
+bin/lib/%.o: src/lib/%.c
+	$(CC) -c -o $@ $(CFLAGS) $<
+
+bin/sesimos: bin/server.o bin/client.o \
+			 bin/lib/cache.o bin/lib/compress.o bin/lib/config.o bin/lib/fastcgi.o bin/lib/geoip.o \
+			 bin/lib/http.o bin/lib/http_static.o bin/lib/rev_proxy.o bin/lib/sock.o bin/lib/uri.o \
+		     bin/lib/utils.o bin/lib/websocket.o
+	$(CC) -o $@ $^ $(CFLAGS) $(LDFLAGS)
+
+
+bin/server.o: src/server.h src/defs.h src/client.h src/lib/cache.h src/lib/config.h src/lib/sock.h \
+              src/lib/rev_proxy.h src/lib/geoip.h src/lib/utils.h
+
+bin/client.o: src/client.h src/defs.h src/server.h src/lib/utils.h src/lib/config.h src/lib/sock.h \
+              src/lib/http.h src/lib/rev_proxy.h src/lib/fastcgi.h src/lib/cache.h src/lib/geoip.h src/lib/compress.h \
+              src/lib/websocket.h
+
+bin/lib/cache.o: src/lib/cache.h src/lib/utils.h src/lib/uri.h src/lib/compress.h
+
+bin/lib/compress.o: src/lib/compress.h
+
+bin/lib/config.o: src/lib/config.h src/lib/utils.h src/lib/uri.h
+
+bin/lib/fastcgi.o: src/lib/fastcgi.h src/server.h src/lib/utils.h src/lib/compress.h src/lib/http.h \
+                   src/lib/uri.h src/lib/include/fastcgi.h
+
+bin/lib/geoip.o: src/lib/geoip.h
+
+bin/lib/http.o: src/lib/http.h src/lib/utils.h src/lib/compress.h src/lib/sock.h
+
+bin/lib/rev_proxy.o: src/lib/rev_proxy.h src/defs.h src/server.h src/lib/compress.h
+
+bin/lib/sock.o: src/lib/sock.h
+
+bin/lib/uri.o: src/lib/uri.h src/lib/utils.h
+
+bin/lib/utils.o: src/lib/utils.h
+
+bin/lib/websocket.o: src/lib/websocket.h src/defs.h src/lib/utils.h src/lib/sock.h
 
-packages:
-	@echo "Installing packages..."
-	sudo apt install gcc php-fpm libmagic-dev libssl-dev libmaxminddb-dev
-	@echo "Finished downloading!"
 
 permit:
 	sudo setcap 'cap_net_bind_service=+ep' "$(shell pwd)/bin/sesimos"
 
-compile:
-	@mkdir -p bin
-	$(CC) src/lib/*.c -o bin/libsesimos.so --shared -fPIC $(CFLAGS) $(LIBS)
-	$(CC) src/server.c src/client.c -o bin/sesimos $(CFLAGS) $(LIBS) \
-		-Lbin -lsesimos -Wl,-rpath=$(shell pwd)/bin
-
-compile-prod:
-	@mkdir -p bin
-	$(CC) src/lib/*.c -o bin/libsesimos.so --shared -fPIC $(CFLAGS) $(LIBS) $(DEBIAN_OPTS) -O3
-	$(CC) src/server.c src/client.c -o bin/sesimos $(CFLAGS) $(LIBS) $(DEBIAN_OPTS) -O3 \
-		-Lbin -lsesimos -Wl,-rpath=$(shell pwd)/bin
+clean:
+	rm -rf bin/*

README.md

@@ -21,7 +21,7 @@ Sesimos – Secure, simple, modern web server
 
 ## Configuration
 
-See [docs/example.conf](docs/example.conf) for more details.
+See [doc/example.conf](doc/example.conf) for more details.
 
 
 ### Global directives

src/client.c

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Client connection and request handlers
- * src/client.c
- * Lorenz Stechauner, 2020-12-03
+ * @brief Client connection and request handlers
+ * @file src/client.c
+ * @author Lorenz Stechauner
+ * @date 2020-12-03
  */
 
 #include "defs.h"
@@ -29,7 +30,7 @@
 #include <arpa/inet.h>
 
 
-int server_keep_alive = 1;
+volatile sig_atomic_t server_keep_alive = 1;
 struct timeval client_timeout = {.tv_sec = CLIENT_TIMEOUT, .tv_usec = 0};
 
 char *log_client_prefix, *log_conn_prefix, *log_req_prefix, *client_geoip;
@@ -48,7 +49,7 @@ host_config *get_host_config(const char *host) {
     return NULL;
 }
 
-void client_terminate() {
+void client_terminate(int _) {
     server_keep_alive = 0;
 }
 
@@ -85,7 +86,7 @@ int client_request_handler(sock *client, unsigned long client_num, unsigned int
 
     clock_gettime(CLOCK_MONOTONIC, &begin);
 
-    ret = sock_poll_read(&client, NULL, 1, CLIENT_TIMEOUT * 1000);
+    ret = sock_poll_read(&client, NULL, NULL, 1, NULL, NULL, CLIENT_TIMEOUT * 1000);
 
     http_add_header_field(&res.hdr, "Date", http_get_date(buf0, sizeof(buf0)));
     http_add_header_field(&res.hdr, "Server", SERVER_STR);
@@ -178,8 +179,7 @@ int client_request_handler(sock *client, unsigned long client_num, unsigned int
         int change_proto = strncmp(uri.uri, "/.well-known/", 13) != 0 && !client->enc;
         if (strcmp(uri.uri, buf0) != 0 || change_proto) {
             res.status = http_get_status(308);
-            size = sizeof(buf0);
-            url_encode(uri.uri, buf0, &size);
+            size = url_encode(uri.uri, strlen(uri.uri), buf0, sizeof(buf0));
             if (change_proto) {
                 p_len = snprintf(buf1, sizeof(buf1), "https://%s%s", host, buf0);
                 if (p_len < 0 || p_len >= sizeof(buf1)) {
@@ -200,12 +200,6 @@ int client_request_handler(sock *client, unsigned long client_num, unsigned int
         goto respond;
     }
 
-    if (http_get_header_field(&req.hdr, "Transfer-Encoding") != NULL) {
-        sprintf(err_msg, "This server is unable to process requests with the Transfer-Encoding header field.");
-        res.status = http_get_status(501);
-        goto respond;
-    }
-
     if (conf->type == CONFIG_TYPE_LOCAL) {
         if (strcmp(req.method, "TRACE") == 0) {
             res.status = http_get_status(200);
@@ -253,7 +247,7 @@ int client_request_handler(sock *client, unsigned long client_num, unsigned int
                 goto respond;
             }
 
-            if (http_get_header_field(&req.hdr, "Content-Length") != NULL) {
+            if (http_get_header_field(&req.hdr, "Content-Length") != NULL || http_get_header_field(&req.hdr, "Transfer-Encoding") != NULL) {
                 res.status = http_get_status(400);
                 sprintf(err_msg, "A GET request must not contain a payload");
                 goto respond;
@@ -396,18 +390,23 @@ int client_request_handler(sock *client, unsigned long client_num, unsigned int
             }
 
             const char *client_content_length = http_get_header_field(&req.hdr, "Content-Length");
+            const char *client_transfer_encoding = http_get_header_field(&req.hdr, "Transfer-Encoding");
             if (client_content_length != NULL) {
                 unsigned long client_content_len = strtoul(client_content_length, NULL, 10);
                 ret = fastcgi_receive(&fcgi_conn, client, client_content_len);
-                if (ret != 0) {
-                    if (ret < 0) {
-                        goto abort;
-                    } else {
-                        sprintf(err_msg, "Unable to communicate with FastCGI socket.");
-                    }
-                    res.status = http_get_status(502);
-                    goto respond;
+            } else if (client_transfer_encoding != NULL && strstr(client_transfer_encoding, "chunked") != NULL) {
+                ret = fastcgi_receive_chunked(&fcgi_conn, client);
+            } else {
+                ret = 0;
+            }
+            if (ret != 0) {
+                if (ret < 0) {
+                    goto abort;
+                } else {
+                    sprintf(err_msg, "Unable to communicate with FastCGI socket.");
                 }
+                res.status = http_get_status(502);
+                goto respond;
             }
             fastcgi_close_stdin(&fcgi_conn);
 
@@ -495,7 +494,6 @@ int client_request_handler(sock *client, unsigned long client_num, unsigned int
                     use_rev_proxy = (strcmp(buf0, ws_accept) == 0) ? 2 : 1;
                 }
             } else {
-                print("Fail Test1");
                 ctx.status = 101;
                 ctx.origin = INTERNAL;
                 res.status = http_get_status(501);
@@ -679,7 +677,7 @@ int client_request_handler(sock *client, unsigned long client_num, unsigned int
             }
         } else if (use_fastcgi) {
             const char *transfer_encoding = http_get_header_field(&res.hdr, "Transfer-Encoding");
-            int chunked = (transfer_encoding != NULL && strcmp(transfer_encoding, "chunked") == 0);
+            int chunked = (transfer_encoding != NULL && strstr(transfer_encoding, "chunked") != NULL);
 
             int flags = (chunked ? FASTCGI_CHUNKED : 0) | (use_fastcgi & (FASTCGI_COMPRESS | FASTCGI_COMPRESS_HOLD));
             ret = fastcgi_send(&fcgi_conn, client, flags);
@@ -720,12 +718,6 @@ int client_request_handler(sock *client, unsigned long client_num, unsigned int
     }
     http_free_req(&req);
     http_free_res(&res);
-    if (client->buf != NULL) {
-        free(client->buf);
-        client->buf = NULL;
-        client->buf_off = 0;
-        client->buf_len = 0;
-    }
     return !client_keep_alive;
 }
 

src/client.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Client connection and request handlers (header file)
- * src/client.h
- * Lorenz Stechauner, 2022-08-16
+ * @brief Client connection and request handlers (header file)
+ * @file src/client.h
+ * @author Lorenz Stechauner
+ * @date 2022-08-16
  */
 
 #ifndef SESIMOS_CLIENT_H

src/defs.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Definitions
- * src/defs.h
- * Lorenz Stechauner, 2021-05-04
+ * @brief Definitions
+ * @file src/defs.h
+ * @author Lorenz Stechauner
+ * @date 2021-05-04
  */
 
 #ifndef SESIMOS_DEF_H

src/lib/cache.c

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * File cache implementation
- * src/lib/cache.c
- * Lorenz Stechauner, 2020-12-19
+ * @brief File cache implementation
+ * @file src/lib/cache.c
+ * @author Lorenz Stechauner
+ * @date 2020-12-19
  */
 
 #include "cache.h"
@@ -16,15 +17,14 @@
 #include <string.h>
 #include <errno.h>
 #include <signal.h>
-#include <openssl/sha.h>
-#include <malloc.h>
+#include <openssl/evp.h>
 
 
 int cache_continue = 1;
 magic_t magic;
 cache_entry *cache;
 
-int magic_init() {
+int magic_init(void) {
     magic = magic_open(MAGIC_MIME);
     if (magic == NULL) {
         fprintf(stderr, ERR_STR "Unable to open magic cookie: %s" CLR_STR "\n", strerror(errno));
@@ -37,11 +37,11 @@ int magic_init() {
     return 0;
 }
 
-void cache_process_term() {
+void cache_process_term(int _) {
     cache_continue = 0;
 }
 
-int cache_process() {
+int cache_process(void) {
     signal(SIGINT, cache_process_term);
     signal(SIGTERM, cache_process_term);
 
@@ -80,14 +80,12 @@ int cache_process() {
     }
 
     FILE *file;
-    char *buf = malloc(CACHE_BUF_SIZE);
-    char *comp_buf = malloc(CACHE_BUF_SIZE);
-    char filename_comp_gz[256];
-    char filename_comp_br[256];
+    char buf[CACHE_BUF_SIZE], comp_buf[CACHE_BUF_SIZE], filename_comp_gz[256], filename_comp_br[256];
     unsigned long read;
     int compress;
-    SHA_CTX ctx;
-    unsigned char hash[SHA_DIGEST_LENGTH];
+    EVP_MD_CTX *ctx;
+    unsigned char hash[EVP_MAX_MD_SIZE];
+    unsigned int md_len;
     int cache_changed = 0;
     int p_len_gz, p_len_br;
     int ret;
@@ -96,7 +94,9 @@ int cache_process() {
             if (cache[i].filename[0] != 0 && cache[i].meta.etag[0] == 0 && !cache[i].is_updating) {
                 cache[i].is_updating = 1;
                 fprintf(stdout, "[cache] Hashing file %s\n", cache[i].filename);
-                SHA1_Init(&ctx);
+
+                ctx = EVP_MD_CTX_new();
+                EVP_DigestInit(ctx, EVP_sha1());
                 file = fopen(cache[i].filename, "rb");
                 compress = mime_is_compressible(cache[i].meta.type);
 
@@ -130,11 +130,8 @@ int cache_process() {
                     p_len_br = snprintf(filename_comp_br, sizeof(filename_comp_br),
                                         "%.*s/.sesimos/cache/%s.br",
                                         cache[i].webroot_len, cache[i].filename, buf);
-                    if (p_len_gz < 0 || p_len_gz >= sizeof(filename_comp_gz) ||
-                        p_len_br < 0 || p_len_br >= sizeof(filename_comp_br))
-                    {
-                        fprintf(stderr, ERR_STR "Unable to open cached file: "
-                                                "File name for compressed file too long" CLR_STR "\n");
+                    if (p_len_gz < 0 || p_len_gz >= sizeof(filename_comp_gz) || p_len_br < 0 || p_len_br >= sizeof(filename_comp_br)) {
+                        fprintf(stderr, ERR_STR "Unable to open cached file: File name for compressed file too long" CLR_STR "\n");
                         goto comp_err;
                     }
 
@@ -158,21 +155,19 @@ int cache_process() {
                 }
 
                 while ((read = fread(buf, 1, CACHE_BUF_SIZE, file)) > 0) {
-                    SHA1_Update(&ctx, buf, read);
+                    EVP_DigestUpdate(ctx, buf, read);
                     if (compress) {
                         unsigned long avail_in, avail_out;
                         avail_in = read;
                         do {
                             avail_out = CACHE_BUF_SIZE;
-                            compress_compress_mode(&comp_ctx, COMPRESS_GZ,buf + read - avail_in, &avail_in,
-                                                   comp_buf, &avail_out, feof(file));
+                            compress_compress_mode(&comp_ctx, COMPRESS_GZ,buf + read - avail_in, &avail_in, comp_buf, &avail_out, feof(file));
                             fwrite(comp_buf, 1, CACHE_BUF_SIZE - avail_out, comp_file_gz);
                         } while (avail_in != 0 || avail_out != CACHE_BUF_SIZE);
                         avail_in = read;
                         do {
                             avail_out = CACHE_BUF_SIZE;
-                            compress_compress_mode(&comp_ctx, COMPRESS_BR, buf + read - avail_in, &avail_in,
-                                                   comp_buf, &avail_out, feof(file));
+                            compress_compress_mode(&comp_ctx, COMPRESS_BR, buf + read - avail_in, &avail_in, comp_buf, &avail_out, feof(file));
                             fwrite(comp_buf, 1, CACHE_BUF_SIZE - avail_out, comp_file_br);
                         } while (avail_in != 0 || avail_out != CACHE_BUF_SIZE);
                     }
@@ -189,9 +184,12 @@ int cache_process() {
                     memset(cache[i].meta.filename_comp_gz, 0, sizeof(cache[i].meta.filename_comp_gz));
                     memset(cache[i].meta.filename_comp_br, 0, sizeof(cache[i].meta.filename_comp_br));
                 }
-                SHA1_Final(hash, &ctx);
+
+                EVP_DigestFinal(ctx, hash, &md_len);
+                EVP_MD_CTX_free(ctx);
+
                 memset(cache[i].meta.etag, 0, sizeof(cache[i].meta.etag));
-                for (int j = 0; j < SHA_DIGEST_LENGTH; j++) {
+                for (int j = 0; j < md_len; j++) {
                     sprintf(cache[i].meta.etag + j * 2, "%02x", hash[j]);
                 }
                 fclose(file);
@@ -206,8 +204,6 @@ int cache_process() {
             cache_file = fopen("/var/sesimos/server/cache", "wb");
             if (cache_file == NULL) {
                 fprintf(stderr, ERR_STR "Unable to open cache file: %s" CLR_STR "\n", strerror(errno));
-                free(buf);
-                free(comp_buf);
                 return -1;
             }
             fwrite(cache, sizeof(cache_entry), CACHE_ENTRIES, cache_file);
@@ -216,12 +212,11 @@ int cache_process() {
             sleep(1);
         }
     }
-    free(buf);
-    free(comp_buf);
+
     return 0;
 }
 
-int cache_init() {
+int cache_init(void) {
     if (magic_init() != 0) {
         return -1;
     }
@@ -267,7 +262,7 @@ int cache_init() {
     }
 }
 
-int cache_unload() {
+int cache_unload(void) {
     int shm_id = shmget(CACHE_SHM_KEY, 0, 0);
     if (shm_id < 0) {
         fprintf(stderr, ERR_STR "Unable to get cache shared memory id: %s" CLR_STR "\n", strerror(errno));

src/lib/cache.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * File cache implementation (header file)
- * src/lib/cache.h
- * Lorenz Stechauner, 2020-12-19
+ * @brief File cache implementation (header file)
+ * @file src/lib/cache.h
+ * @author Lorenz Stechauner
+ * @date 2020-12-19
  */
 
 #ifndef SESIMOS_CACHE_H
@@ -30,15 +31,15 @@ extern cache_entry *cache;
 
 extern int cache_continue;
 
-int magic_init();
+int magic_init(void);
 
-void cache_process_term();
+void cache_process_term(int _);
 
-int cache_process();
+int cache_process(void);
 
-int cache_init();
+int cache_init(void);
 
-int cache_unload();
+int cache_unload(void);
 
 int cache_update_entry(int entry_num, const char *filename, const char *webroot);
 

src/lib/compress.c

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Compression interface
- * src/lib/compress.c
- * Lorenz Stechauner, 2021-05-05
+ * @brief Compression interface
+ * @file src/lib/compress.c
+ * @author Lorenz Stechauner
+ * @date 2021-05-05
  */
 
 #include "compress.h"

src/lib/compress.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Compression interface (header file)
- * src/lib/compress.h
- * Lorenz Stechauner, 2021-05-05
+ * @brief Compression interface (header file)
+ * @file src/lib/compress.h
+ * @author Lorenz Stechauner
+ * @date 2021-05-05
  */
 
 #ifndef SESIMOS_COMPRESS_H

src/lib/config.c

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Configuration file loader
- * src/lib/config.c
- * Lorenz Stechauner, 2021-01-05
+ * @brief Configuration file loader
+ * @file src/lib/config.c
+ * @author Lorenz Stechauner
+ * @date 2021-01-05
  */
 
 #include "config.h"
@@ -19,7 +20,7 @@
 t_config *config;
 char geoip_dir[256], dns_server[256];
 
-int config_init() {
+int config_init(void) {
     int shm_id = shmget(CONFIG_SHM_KEY, sizeof(t_config), IPC_CREAT | IPC_EXCL | 0640);
     if (shm_id < 0) {
         fprintf(stderr, ERR_STR "Unable to create config shared memory: %s" CLR_STR "\n", strerror(errno));
@@ -45,7 +46,7 @@ int config_init() {
     return 0;
 }
 
-int config_unload() {
+int config_unload(void) {
     int shm_id = shmget(CONFIG_SHM_KEY, 0, 0);
     if (shm_id < 0) {
         fprintf(stderr, ERR_STR "Unable to get config shared memory id: %s" CLR_STR "\n", strerror(errno));

src/lib/config.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Configuration file loader (header file)
- * src/lib/config.h
- * Lorenz Stechauner, 2021-01-05
+ * @brief Configuration file loader (header file)
+ * @file src/lib/config.h
+ * @author Lorenz Stechauner
+ * @date 2021-01-05
  */
 
 #ifndef SESIMOS_CONFIG_H
@@ -55,10 +56,10 @@ typedef struct {
 extern t_config *config;
 extern char geoip_dir[256], dns_server[256];
 
-int config_init();
+int config_init(void);
 
 int config_load(const char *filename);
 
-int config_unload();
+int config_unload(void);
 
 #endif //SESIMOS_CONFIG_H

src/lib/fastcgi.c

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * FastCGI interface implementation
- * src/lib/fastcgi.c
- * Lorenz Stechauner, 2020-12-26
+ * @brief FastCGI interface implementation
+ * @file src/lib/fastcgi.c
+ * @author Lorenz Stechauner
+ * @date 2020-12-26
  */
 
 #include "fastcgi.h"
@@ -599,12 +600,6 @@ int fastcgi_receive(fastcgi_conn *conn, sock *client, unsigned long len) {
             .reserved = 0
     };
 
-    if (client->buf != NULL && client->buf_len - client->buf_off > 0) {
-        ret = (int) (client->buf_len - client->buf_off);
-        memcpy(buf, client->buf + client->buf_off, ret);
-        goto send;
-    }
-
     while (rcv_len < len) {
         ret = sock_recv(client, buf, sizeof(buf), 0);
         if (ret <= 0) {
@@ -612,7 +607,6 @@ int fastcgi_receive(fastcgi_conn *conn, sock *client, unsigned long len) {
             return -1;
         }
 
-        send:
         rcv_len += ret;
         header.contentLengthB1 = (ret >> 8) & 0xFF;
         header.contentLengthB0 = ret & 0xFF;
@@ -625,3 +619,21 @@ int fastcgi_receive(fastcgi_conn *conn, sock *client, unsigned long len) {
     }
     return 0;
 }
+
+int fastcgi_receive_chunked(fastcgi_conn *conn, sock *client) {
+    long ret;
+    unsigned long next_len;
+
+    while (1) {
+        ret = sock_get_chunk_header(client);
+        if (ret < 0) return (int) ret;
+
+        next_len = ret;
+        if (next_len <= 0) break;
+
+        ret = fastcgi_receive(conn, client, next_len);
+        if (ret < 0) return (int) ret;
+    }
+
+    return 0;
+}

src/lib/fastcgi.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * FastCGI interface implementation (header file)
- * src/lib/fastcgi.h
- * Lorenz Stechauner, 2020-12-26
+ * @brief FastCGI interface implementation (header file)
+ * @file src/lib/fastcgi.h
+ * @author Lorenz Stechauner
+ * @date 2020-12-26
  */
 
 #ifndef SESIMOS_FASTCGI_H
@@ -54,4 +55,6 @@ int fastcgi_dump(fastcgi_conn *conn, char *buf, long len);
 
 int fastcgi_receive(fastcgi_conn *conn, sock *client, unsigned long len);
 
+int fastcgi_receive_chunked(fastcgi_conn *conn, sock *client);
+
 #endif //SESIMOS_FASTCGI_H

src/lib/geoip.c

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * MaxMind GeoIP Database interface
- * src/lib/geoip.c
- * Lorenz Stechauner, 2021-05-04
+ * @brief MaxMind GeoIP Database interface
+ * @file src/lib/geoip.c
+ * @author Lorenz Stechauner
+ * @date 2021-05-04
  */
 
 #include "geoip.h"

src/lib/geoip.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * MaxMind GeoIP Database interface (header file)
- * src/lib/geoip.h
- * Lorenz Stechauner, 2021-05-04
+ * @brief MaxMind GeoIP Database interface (header file)
+ * @file src/lib/geoip.h
+ * @author Lorenz Stechauner
+ * @date 2021-05-04
  */
 
 

src/lib/http.c

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * HTTP implementation
- * src/lib/http.c
- * Lorenz Stechauner, 2020-12-09
+ * @brief HTTP implementation
+ * @file src/lib/http.c
+ * @author Lorenz Stechauner
+ * @date 2020-12-09
  */
 
 #include "http.h"
@@ -144,7 +145,7 @@ int http_receive_request(sock *client, http_req *req) {
     req->hdr.last_field_num = -1;
 
     while (1) {
-        rcv_len  = sock_recv(client, buf, CLIENT_MAX_HEADER_SIZE, 0);
+        rcv_len = sock_recv(client, buf, CLIENT_MAX_HEADER_SIZE, MSG_PEEK);
         if (rcv_len <= 0) {
             print("Unable to receive http header: %s", sock_strerror(client));
             return -1;
@@ -154,6 +155,8 @@ int http_receive_request(sock *client, http_req *req) {
         if (header_len <= 0) {
             print(ERR_STR "Unable to parse http header: End of header not found" CLR_STR);
             return 5;
+        } else {
+            rcv_len = sock_recv(client, buf, header_len, 0);
         }
 
         for (int i = 0; i < header_len; i++) {
@@ -215,13 +218,6 @@ int http_receive_request(sock *client, http_req *req) {
         }
     }
 
-    client->buf_len = rcv_len - (pos0 - buf + 4);
-    if (client->buf_len > 0) {
-        client->buf = malloc(client->buf_len);
-        client->buf_off = 0;
-        memcpy(client->buf, pos0 + 4, client->buf_len);
-    }
-
     return 0;
 }
 

src/lib/http.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * HTTP implementation (header file)
- * src/lib/http.h
- * Lorenz Stechauner, 2020-12-09
+ * @brief HTTP implementation (header file)
+ * @file src/lib/http.h
+ * @author Lorenz Stechauner
+ * @date 2020-12-09
  */
 
 #ifndef SESIMOS_HTTP_H

src/lib/http_static.c

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * HTTP static implementation
- * src/lib/http_static.c
- * Lorenz Stechauner, 2021-05-03
+ * @brief HTTP static implementation
+ * @file src/lib/http_static.c
+ * @author Lorenz Stechauner
+ * @date 2021-05-03
  */
 
 #include "../defs.h"

src/lib/include/fastcgi.h

@@ -1,8 +1,7 @@
 /**
  * sesimos - secure, simple, modern web server
- * FastCGI header file
- * src/lib/include/fastcgi.h
- * Lorenz Stechauner, 2021-05-03
+ * @brief FastCGI header file
+ * @file src/lib/include/fastcgi.h
  */
 
 #ifndef SESIMOS_EXTERN_FASTCGI_H

src/lib/rev_proxy.c

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Reverse proxy
- * src/lib/rev_proxy.c
- * Lorenz Stechauner, 2021-01-07
+ * @brief Reverse proxy
+ * @file src/lib/rev_proxy.c
+ * @author Lorenz Stechauner
+ * @date 2021-01-07
  */
 
 #include "../defs.h"
@@ -23,10 +24,7 @@ sock rev_proxy;
 char *rev_proxy_host = NULL;
 struct timeval server_timeout = {.tv_sec = SERVER_TIMEOUT, .tv_usec = 0};
 
-int rev_proxy_preload() {
-    rev_proxy.buf = NULL;
-    rev_proxy.buf_len = 0;
-    rev_proxy.buf_off = 0;
+int rev_proxy_preload(void) {
     rev_proxy.ctx = SSL_CTX_new(TLS_client_method());
     return 0;
 }
@@ -323,46 +321,35 @@ int rev_proxy_init(http_req *req, http_res *res, http_status_ctx *ctx, host_conf
     }
 
     const char *content_length = http_get_header_field(&req->hdr, "Content-Length");
-    if (content_length != NULL) {
-        unsigned long content_len = strtoul(content_length, NULL, 10);
-        if (client->buf_len - client->buf_off > 0) {
-            unsigned long len = client->buf_len - client->buf_off;
-            if (len > content_len) {
-                len = content_len;
-            }
-            ret = sock_send(&rev_proxy, client->buf, len, 0);
-            if (ret <= 0) {
-                res->status = http_get_status(502);
-                ctx->origin = SERVER_REQ;
-                print(ERR_STR "Unable to send request to server (2): %s" CLR_STR, sock_strerror(&rev_proxy));
-                sprintf(err_msg, "Unable to send request to server: %s.", sock_strerror(&rev_proxy));
-                retry = tries < 4;
-                goto proxy_err;
-            }
-            content_len -= len;
-        }
-        if (content_len > 0) {
-            ret = sock_splice(&rev_proxy, client, buffer, sizeof(buffer), content_len);
-            if (ret <= 0) {
-                if (ret == -1) {
-                    res->status = http_get_status(502);
-                    ctx->origin = SERVER_REQ;
-                    print(ERR_STR "Unable to send request to server (3): %s" CLR_STR, sock_strerror(&rev_proxy));
-                    sprintf(err_msg, "Unable to send request to server: %s.", sock_strerror(&rev_proxy));
-                    goto proxy_err;
-                } else if (ret == -2) {
-                    res->status = http_get_status(400);
-                    ctx->origin = CLIENT_REQ;
-                    print(ERR_STR "Unable to receive request from client: %s" CLR_STR, sock_strerror(client));
-                    sprintf(err_msg, "Unable to receive request from client: %s.", sock_strerror(client));
-                    return -1;
-                }
-                res->status = http_get_status(500);
-                ctx->origin = INTERNAL;
-                print(ERR_STR "Unknown Error" CLR_STR);
-                return -1;
-            }
+    unsigned long content_len = content_length != NULL ? strtoul(content_length, NULL, 10) : 0;
+    const char *transfer_encoding = http_get_header_field(&req->hdr, "Transfer-Encoding");
+
+    ret = 0;
+    if (content_len > 0) {
+        ret = sock_splice(&rev_proxy, client, buffer, sizeof(buffer), content_len);
+    } else if (transfer_encoding != NULL && strstr(transfer_encoding, "chunked") != NULL) {
+        ret = sock_splice_chunked(&rev_proxy, client, buffer, sizeof(buffer));
+    }
+
+    if (ret < 0 || (content_len != 0 && ret != content_len)) {
+        if (ret == -1) {
+            res->status = http_get_status(502);
+            ctx->origin = SERVER_REQ;
+            print(ERR_STR "Unable to send request to server (2): %s" CLR_STR, sock_strerror(&rev_proxy));
+            sprintf(err_msg, "Unable to send request to server: %s.", sock_strerror(&rev_proxy));
+            retry = tries < 4;
+            goto proxy_err;
+        } else if (ret == -2) {
+            res->status = http_get_status(400);
+            ctx->origin = CLIENT_REQ;
+            print(ERR_STR "Unable to receive request from client: %s" CLR_STR, sock_strerror(client));
+            sprintf(err_msg, "Unable to receive request from client: %s.", sock_strerror(client));
+            return -1;
         }
+        res->status = http_get_status(500);
+        ctx->origin = INTERNAL;
+        print(ERR_STR "Unknown Error" CLR_STR);
+        return -1;
     }
 
     ret = sock_recv(&rev_proxy, buffer, sizeof(buffer), MSG_PEEK);
@@ -491,20 +478,18 @@ int rev_proxy_send(sock *client, unsigned long len_to_send, int flags) {
     do {
         snd_len = 0;
         if (flags & REV_PROXY_CHUNKED) {
-            char *pos;
-            ret = sock_recv(&rev_proxy, buffer, 16, MSG_PEEK);
-            if (ret <= 0) goto err0;
-
-            len_to_send = strtol(buffer, NULL, 16);
-            pos = strstr(buffer, "\r\n");
-            len = pos - buffer + 2;
-            sock_recv(&rev_proxy, buffer, len, 0);
-            if (ret <= 0) {
-                err0:
-                print("Unable to receive from server: %s", sock_strerror(&rev_proxy));
+            ret = sock_get_chunk_header(&rev_proxy);
+            if (ret < 0) {
+                if (ret == -1) {
+                    print("Unable to receive from server: Malformed chunk header");
+                } else {
+                    print("Unable to receive from server: %s", sock_strerror(&rev_proxy));
+                }
                 break;
             }
 
+            len_to_send = ret;
+            ret = 1;
             if (len_to_send == 0 && (flags & REV_PROXY_COMPRESS)) {
                 finish_comp = 1;
                 len = 0;
@@ -538,11 +523,14 @@ int rev_proxy_send(sock *client, unsigned long len_to_send, int flags) {
                 if (buf_len != 0) {
                     len = sprintf(buf, "%lX\r\n", buf_len);
                     ret = 1;
+
                     if (flags & REV_PROXY_CHUNKED) ret = sock_send(client, buf, len, 0);
                     if (ret <= 0) goto err;
+
                     ret = sock_send(client, ptr, buf_len, 0);
                     if (ret <= 0) goto err;
                     if (!(flags & REV_PROXY_COMPRESS)) snd_len += ret;
+
                     if (flags & REV_PROXY_CHUNKED) ret = sock_send(client, "\r\n", 2, 0);
                     if (ret <= 0) {
                         err:
@@ -558,7 +546,7 @@ int rev_proxy_send(sock *client, unsigned long len_to_send, int flags) {
         if (flags & REV_PROXY_CHUNKED) sock_recv(&rev_proxy, buffer, 2, 0);
     } while ((flags & REV_PROXY_CHUNKED) && len_to_send > 0);
 
-    if (ret <= 0) return (int) -1;
+    if (ret <= 0) return -1;
 
     if (flags & REV_PROXY_CHUNKED) {
         ret = sock_send(client, "0\r\n\r\n", 5, 0);

src/lib/rev_proxy.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Reverse proxy (header file)
- * src/lib/rev_proxy.h
- * Lorenz Stechauner, 2021-01-07
+ * @brief Reverse proxy (header file)
+ * @file src/lib/rev_proxy.h
+ * @author Lorenz Stechauner
+ * @date 2021-01-07
  */
 
 #ifndef SESIMOS_REV_PROXY_H
@@ -22,7 +23,7 @@
 
 extern sock rev_proxy;
 
-int rev_proxy_preload();
+int rev_proxy_preload(void);
 
 int rev_proxy_request_header(http_req *req, int enc);
 

src/lib/sock.c

@@ -1,11 +1,13 @@
 /**
  * sesimos - secure, simple, modern web server
- * Basic TCP and TLS socket
- * src/lib/sock.c
- * Lorenz Stechauner, 2021-01-07
+ * @brief Basic TCP and TLS socket
+ * @file src/lib/sock.c
+ * @author Lorenz Stechauner
+ * @date 2021-01-07
  */
 
 #include "sock.h"
+#include "utils.h"
 
 #include <openssl/err.h>
 #include <openssl/ssl.h>
@@ -71,11 +73,8 @@ long sock_send(sock *s, void *buf, unsigned long len, int flags) {
 long sock_recv(sock *s, void *buf, unsigned long len, int flags) {
     long ret;
     if (s->enc) {
-        if (flags & MSG_PEEK) {
-            ret = SSL_peek(s->ssl, buf, (int) len);
-        } else {
-            ret = SSL_read(s->ssl, buf, (int) len);
-        }
+        int (*func)(SSL*, void*, int) = (flags & MSG_PEEK) ? SSL_peek : SSL_read;
+        ret = func(s->ssl, buf, (int) len);
         s->_ssl_error = ERR_get_error();
     } else {
         ret = recv(s->socket, buf, len, flags);
@@ -92,7 +91,7 @@ long sock_splice(sock *dst, sock *src, void *buf, unsigned long buf_len, unsigne
     while (send_len < len) {
         next_len = (buf_len < (len - send_len)) ? buf_len : (len - send_len);
         ret = sock_recv(src, buf, next_len, 0);
-        if (ret < 0) return -2;
+        if (ret <= 0) return -2;
         next_len = ret;
         ret = sock_send(dst, buf, next_len, send_len + next_len < len ? MSG_MORE : 0);
         if (ret < 0) return -1;
@@ -102,6 +101,25 @@ long sock_splice(sock *dst, sock *src, void *buf, unsigned long buf_len, unsigne
     return (long) send_len;
 }
 
+long sock_splice_chunked(sock *dst, sock *src, void *buf, unsigned long buf_len) {
+    long ret;
+    unsigned long send_len = 0;
+    unsigned long next_len;
+
+    while (1) {
+        ret = sock_get_chunk_header(src);
+        if (ret < 0) return -2;
+
+        next_len = ret;
+        if (next_len <= 0) break;
+
+        ret = sock_splice(dst, src, buf, buf_len, next_len);
+        if (ret < 0) return ret;
+    }
+
+    return (long) send_len;
+}
+
 int sock_close(sock *s) {
     if ((int) s->enc && s->ssl != NULL) {
         if (s->_last_ret >= 0) SSL_shutdown(s->ssl);
@@ -120,7 +138,7 @@ int sock_check(sock *s) {
     return recv(s->socket, &buf, 1, MSG_PEEK | MSG_DONTWAIT) == 1;
 }
 
-int sock_poll(sock *sockets[], sock *ready[], short events, int n_sock, int timeout_ms) {
+int sock_poll(sock *sockets[], sock *ready[], sock *error[], int n_sock, int *n_ready, int *n_error, short events, int timeout_ms) {
     struct pollfd fds[n_sock];
     for (int i = 0; i < n_sock; i++) {
         fds[i].fd = sockets[i]->socket;
@@ -128,20 +146,59 @@ int sock_poll(sock *sockets[], sock *ready[], short events, int n_sock, int time
     }
 
     int ret = poll(fds, n_sock, timeout_ms);
-    if (ret < 0 || ready == NULL) return ret;
+    if (ret < 0 || ready == NULL || error == NULL) return ret;
 
-    int j = 0;
+    *n_ready = 0, *n_error = 0;
     for (int i = 0; i < n_sock; i++) {
         if (fds[i].revents & events)
-            ready[j++] = sockets[i];
+            ready[(*n_ready)++] = sockets[i];
+        if (fds[i].revents & (POLLERR | POLLHUP | POLLNVAL))
+            error[(*n_error)++] = sockets[i];
     }
-    return j;
+
+    return ret;
 }
 
-int sock_poll_read(sock *sockets[], sock *readable[], int n_sock, int timeout_ms) {
-    return sock_poll(sockets, readable, POLLIN, n_sock, timeout_ms);
+int sock_poll_read(sock *sockets[], sock *readable[], sock *error[], int n_sock, int *n_readable, int *n_error, int timeout_ms) {
+    return sock_poll(sockets, readable, error, n_sock, n_readable, n_error, POLLIN, timeout_ms);
 }
 
-int sock_poll_write(sock *sockets[], sock *writable[], int n_sock, int timeout_ms) {
-    return sock_poll(sockets, writable, POLLOUT, n_sock, timeout_ms);
+int sock_poll_write(sock *sockets[], sock *writable[], sock *error[], int n_sock, int *n_writable, int *n_error, int timeout_ms) {
+    return sock_poll(sockets, writable, error, n_sock, n_writable, n_error, POLLOUT, timeout_ms);
+}
+
+long sock_parse_chunk_header(const char *buf, long len, long *ret_len) {
+    for (int i = 0; i < len; i++) {
+        char ch = buf[i];
+        if (ch == '\r') {
+            continue;
+        } else if (ch == '\n') {
+            if (ret_len != NULL) *ret_len = i + 1;
+            return strtol(buf, NULL, 16);
+        } else if (!((ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F'))) {
+            return -2;
+        }
+    }
+
+    return -1;
+}
+
+long sock_get_chunk_header(sock *s) {
+    long ret, len;
+    char buf[16];
+
+    do {
+        print("debug1");  // TODO remove
+        ret = sock_recv(s, buf, sizeof(buf), MSG_PEEK);
+        if (ret <= 0) return -2;
+        else if (ret < 2) continue;
+
+        ret = sock_parse_chunk_header(buf, ret, &len);
+        if (ret == -2) return -1;
+    } while (ret < 0);
+
+    if (sock_recv(s, buf, len, 0) != len)
+        return -2;
+
+    return ret;
 }

src/lib/sock.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Basic TCP and TLS socket (header file)
- * src/lib/sock.h
- * Lorenz Stechauner, 2021-01-07
+ * @brief Basic TCP and TLS socket (header file)
+ * @file src/lib/sock.h
+ * @author Lorenz Stechauner
+ * @date 2021-01-07
  */
 
 #ifndef SESIMOS_SOCK_H
@@ -16,9 +17,6 @@ typedef struct {
     int socket;
     SSL_CTX *ctx;
     SSL *ssl;
-    char *buf;
-    unsigned long buf_len;
-    unsigned long buf_off;
     long _last_ret;
     int _errno;
     unsigned long _ssl_error;
@@ -34,14 +32,20 @@ long sock_recv(sock *s, void *buf, unsigned long len, int flags);
 
 long sock_splice(sock *dst, sock *src, void *buf, unsigned long buf_len, unsigned long len);
 
+long sock_splice_chunked(sock *dst, sock *src, void *buf, unsigned long buf_len);
+
 int sock_close(sock *s);
 
 int sock_check(sock *s);
 
-int sock_poll(sock *sockets[], sock *readable[], short events, int n_sock, int timeout_ms);
+int sock_poll(sock *sockets[], sock *ready[], sock *error[], int n_sock, int *n_ready, int *n_error, short events, int timeout_ms);
 
-int sock_poll_read(sock *sockets[], sock *readable[], int n_sock, int timeout_ms);
+int sock_poll_read(sock *sockets[], sock *readable[], sock *error[], int n_sock, int *n_readable, int *n_error, int timeout_ms);
 
-int sock_poll_write(sock *sockets[], sock *writable[], int n_sock, int timeout_ms);
+int sock_poll_write(sock *sockets[], sock *writable[], sock *error[], int n_sock, int *n_writable, int *n_error, int timeout_ms);
+
+long sock_parse_chunk_header(const char *buf, long len, long *ret_len);
+
+long sock_get_chunk_header(sock *s);
 
 #endif //SESIMOS_SOCK_H

src/lib/uri.c

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * URI and path handlers
- * src/lib/uri.c
- * Lorenz Stechauner, 2020-12-13
+ * @brief URI and path handlers
+ * @file src/lib/uri.c
+ * @author Lorenz Stechauner
+ * @date 2020-12-13
  */
 
 #include "uri.h"

src/lib/uri.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * URI and path handlers (header file)
- * src/lib/uri.h
- * Lorenz Stechauner, 2020-12-13
+ * @brief URI and path handlers (header file)
+ * @file src/lib/uri.h
+ * @author Lorenz Stechauner
+ * @date 2020-12-13
  */
 
 #ifndef SESIMOS_URI_H

src/lib/utils.c

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Utilities
- * src/lib/utils.c
- * Lorenz Stechauner, 2020-12-03
+ * @brief Utilities
+ * @file src/lib/utils.c
+ * @author Lorenz Stechauner
+ * @date 2020-12-03
  */
 
 #include "utils.h"
@@ -14,69 +15,77 @@
 
 char *log_prefix;
 
+static const char base64_encode_table[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+static const int base64_mod_table[3] = {0, 2, 1};
+
+
 char *format_duration(unsigned long micros, char *buf) {
     if (micros < 10000) {
         sprintf(buf, "%.1f ms", (double) micros / 1000);
-    } else if (micros < 1000000) {
-        sprintf(buf, "%li ms", micros / 1000);
-    } else if (micros < 60000000) {
+    } else if (micros < 1000000 - 1000) {
+        sprintf(buf, "%.0f ms", (double) micros / 1000);
+    } else if (micros < 60000000 - 1000000) {
         sprintf(buf, "%.1f s", (double) micros / 1000000);
     } else if (micros < 6000000000) {
         sprintf(buf, "%.1f min", (double) micros / 1000000 / 60);
     } else {
-        sprintf(buf, "%li min", micros / 1000000 / 60);
+        sprintf(buf, "%.0f min", (double) micros / 1000000 / 60);
     }
     return buf;
 }
 
-int url_encode_component(const char *str, char *enc, long *size) {
-    char *ptr = enc;
-    char ch;
-    memset(enc, 0, *size);
-    for (int i = 0; i < strlen(str); i++, ptr++) {
-        if ((ptr - enc) >= *size) {
-            return -1;
+int url_encode_component(const void *in, size_t size_in, char *out, size_t size_out) {
+    int size = 0;
+
+    // Encode control characters
+    for (int i = 0; i < size_in; i++) {
+        unsigned char ch = ((unsigned char *) in)[i];
+        if (ch == ' ') {
+            ch = '+';
+        } else if (
+                ch <= 0x20 || ch >= 0x7F ||
+                !((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') || (ch >= '0' && ch <= '9') ||
+                  ch == '-' || ch == '_' || ch == '.' || ch == '!' || ch == '~' || ch == '*' || ch == '\'' ||
+                  ch == '(' || ch == ')')
+        ) {
+            size += 3;
+            if (size < size_out) sprintf(out + size - 3, "%%%02X", ch);
+            ch = 0;
         }
-        ch = str[i];
-        if (ch == ':' || ch == '/' || ch == '?' || ch == '#' || ch == '[' || ch == ']' || ch == '@' || ch == '!' ||
-                ch == '$' || ch == '&' || ch == '\'' || ch == '(' || ch == ')' || ch == '*' || ch == '+' || ch == ',' ||
-                ch == ';' || ch == '=' || ch < ' ' || ch > '~') {
-            if ((ptr - enc + 2) >= *size) {
-                return -1;
-            }
-            sprintf(ptr, "%%%02X", ch);
-            ptr += 2;
-        } else if (ch == ' ') {
-            ptr[0] = '+';
-        } else {
-            ptr[0] = ch;
+
+        if (ch != 0) {
+            size++;
+            if (size < size_out) out[size - 1] = (char) ch;
         }
     }
-    *size = ptr - enc;
-    return 0;
+
+    // Set terminating null byte
+    if (size_out > 0) out[size < size_out ? size : size_out - 1] = 0;
+
+    // Return theoretical size
+    return size;
 }
 
-int url_encode(const char *str, char *enc, long *size) {
-    char *ptr = enc;
-    unsigned char ch;
-    memset(enc, 0, *size);
-    for (int i = 0; i < strlen(str); i++, ptr++) {
-        if ((ptr - enc) >= *size) {
-            return -1;
-        }
-        ch = str[i];
-        if (ch > 0x7F || ch == ' ') {
-            if ((ptr - enc + 2) >= *size) {
-                return -1;
-            }
-            sprintf(ptr, "%%%02X", ch);
-            ptr += 2;
+int url_encode(const void *in, size_t size_in, char *out, size_t size_out) {
+    int size = 0;
+
+    // Encode control characters
+    for (int i = 0; i < size_in; i++) {
+        unsigned char ch = ((unsigned char *) in)[i];
+        if (ch <= 0x20 || ch >= 0x7F) {
+            size += 3;
+            if (size < size_out) sprintf(out + size - 3, "%%%02X", ch);
         } else {
-            ptr[0] = (char) ch;
+            size++;
+            if (size < size_out) out[size - 1] = (char) ch;
         }
     }
-    *size = ptr - enc;
-    return 0;
+
+    // Set terminating null byte
+    if (size_out > 0) out[size < size_out ? size : size_out - 1] = 0;
+
+    // Return theoretical size
+    return size;
 }
 
 int url_decode(const char *str, char *dec, long *size) {

src/lib/utils.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Utilities (header file)
- * src/lib/utils.h
- * Lorenz Stechauner, 2020-12-03
+ * @brief Utilities (header file)
+ * @file src/lib/utils.h
+ * @author Lorenz Stechauner
+ * @date 2020-12-03
  */
 
 #ifndef SESIMOS_UTILS_H
@@ -20,9 +21,6 @@
 
 extern char *log_prefix;
 
-static const char base64_encode_table[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-static const int base64_mod_table[3] = {0, 2, 1};
-
 
 #define out_1(fmt) fprintf(stdout, "%s" fmt "\n", log_prefix)
 #define out_2(fmt, args...) fprintf(stdout, "%s" fmt "\n", log_prefix, args)
@@ -36,9 +34,9 @@ static const int base64_mod_table[3] = {0, 2, 1};
 
 char *format_duration(unsigned long micros, char *buf);
 
-int url_encode_component(const char *str, char *enc, long *size);
+int url_encode_component(const void *in, size_t size_in, char *out, size_t size_out);
 
-int url_encode(const char *str, char *enc, long *size);
+int url_encode(const void *in, size_t size_in, char *out, size_t size_out);
 
 int url_decode(const char *str, char *dec, long *size);
 

src/lib/websocket.c

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * WebSocket reverse proxy
- * src/lib/websocket.c
- * Lorenz Stechauner, 2022-08-16
+ * @brief WebSocket reverse proxy
+ * @file src/lib/websocket.c
+ * @author Lorenz Stechauner
+ * @date 2022-08-16
  */
 
 #include "../defs.h"
@@ -14,10 +15,10 @@
 #include <errno.h>
 #include <signal.h>
 
+static const char ws_key_uuid[] = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
+static volatile sig_atomic_t terminate = 0;
 
-int terminate = 0;
-
-void ws_terminate() {
+void ws_terminate(int _) {
     terminate = 1;
 }
 
@@ -145,33 +146,38 @@ int ws_send_frame_header(sock *s, ws_frame *frame) {
 
 int ws_handle_connection(sock *s1, sock *s2) {
     sock *poll_socks[2] = {s1, s2};
-    sock *readable[2];
-    int n_sock = 2;
+    sock *readable[2], *error[2];
+    int n_sock = 2, n_readable = 0, n_error = 0;
     ws_frame frame;
     char buf[CHUNK_SIZE];
-    int poll, closes = 0;
+    int closes = 0;
     long ret;
 
     signal(SIGINT, ws_terminate);
     signal(SIGTERM, ws_terminate);
 
     while (!terminate && closes != 3) {
-        poll = sock_poll_read(poll_socks, readable, n_sock, WS_TIMEOUT * 1000);
+        ret = sock_poll_read(poll_socks, readable, error, n_sock, &n_readable, &n_error, WS_TIMEOUT * 1000);
         if (terminate) {
             break;
-        } else if (poll < 0) {
+        } else if (ret < 0) {
             print(ERR_STR "Unable to poll sockets: %s" CLR_STR, strerror(errno));
             return -1;
-        } else if (poll == 0) {
+        } else if (n_readable == 0) {
             print(ERR_STR "Connection timed out" CLR_STR);
             return -2;
+        } else if (n_error > 0) {
+            print(ERR_STR "Peer closed connection" CLR_STR);
+            return -3;
         }
 
-        for (int i = 0; i < poll; i++) {
+        for (int i = 0; i < n_readable; i++) {
             sock *s = readable[i];
             sock *o = (s == s1) ? s2 : s1;
             if (ws_recv_frame_header(s, &frame) != 0) return -3;
 
+            // print("WebSocket: Peer %s, Opcode=0x%X, Len=%li", (s == s1) ? "1" : "2", frame.opcode, frame.len);
+
             if (frame.opcode == 0x8) {
                 n_sock--;
                 if (s == s1) {
@@ -188,10 +194,10 @@ int ws_handle_connection(sock *s1, sock *s2) {
                 ret = sock_splice(o, s, buf, sizeof(buf), frame.len);
                 if (ret < 0) {
                     print(ERR_STR "Unable to forward data in WebSocket: %s" CLR_STR, strerror(errno));
-                    return -3;
+                    return -4;
                 } else if (ret != frame.len) {
                     print(ERR_STR "Unable to forward correct number of bytes in WebSocket" CLR_STR);
-                    return -3;
+                    return -4;
                 }
             }
         }

src/lib/websocket.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * WebSocket reverse proxy (header file)
- * src/lib/websocket.h
- * Lorenz Stechauner, 2022-08-16
+ * @brief WebSocket reverse proxy (header file)
+ * @file src/lib/websocket.h
+ * @author Lorenz Stechauner
+ * @date 2022-08-16
  */
 
 #ifndef SESIMOS_WEBSOCKET_H
@@ -12,8 +13,6 @@
 
 #define WS_TIMEOUT 3600
 
-const char *ws_key_uuid = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
-
 typedef struct {
     unsigned char f_fin:1;
     unsigned char f_rsv1:1;

src/server.c

@@ -1,12 +1,11 @@
 /**
  * Sesimos - secure, simple, modern web server
- * Main executable
- * src/server.c
- * Lorenz Stechauner, 2020-12-03
+ * @brief Main executable
+ * @file src/server.c
+ * @author Lorenz Stechauner
+ * @date 2020-12-03
  */
 
-#define _POSIX_C_SOURCE 199309L
-
 #include "defs.h"
 #include "server.h"
 #include "client.h"
@@ -35,14 +34,14 @@
 #include <dirent.h>
 
 
-int active = 1;
+volatile sig_atomic_t active = 1;
 const char *config_file;
 int sockets[NUM_SOCKETS];
 pid_t children[MAX_CHILDREN];
 MMDB_s mmdbs[MAX_MMDB];
 SSL_CTX *contexts[CONFIG_MAX_CERT_CONFIG];
 
-void openssl_init() {
+void openssl_init(void) {
     SSL_library_init();
     SSL_load_error_strings();
     ERR_load_BIO_strings();
@@ -58,7 +57,7 @@ static int ssl_servername_cb(SSL *ssl, int *ad, void *arg) {
     return SSL_TLSEXT_ERR_OK;
 }
 
-void destroy() {
+void destroy(int _) {
     fprintf(stderr, "\n" ERR_STR "Terminating forcefully!" CLR_STR "\n");
     int status = 0;
     int ret;
@@ -87,7 +86,7 @@ void destroy() {
     exit(2);
 }
 
-void terminate() {
+void terminate(int _) {
     fprintf(stderr, "\nTerminating gracefully...\n");
     active = 0;
 
@@ -290,10 +289,6 @@ int main(int argc, const char *argv[]) {
 
     openssl_init();
 
-    client.buf = NULL;
-    client.buf_len = 0;
-    client.buf_off = 0;
-
     for (int i = 0; i < CONFIG_MAX_CERT_CONFIG; i++) {
         const cert_config *conf = &config->certs[i];
         if (conf->name[0] == 0) break;
@@ -347,7 +342,7 @@ int main(int argc, const char *argv[]) {
         ready_sockets_num = poll(poll_fds, NUM_SOCKETS, 1000);
         if (ready_sockets_num < 0) {
             fprintf(stderr, ERR_STR "Unable to poll sockets: %s" CLR_STR "\n", strerror(errno));
-            terminate();
+            terminate(0);
             return 1;
         }
 

src/server.h

@@ -1,8 +1,9 @@
 /**
  * sesimos - secure, simple, modern web server
- * Main executable (header file)
- * src/server.h
- * Lorenz Stechauner, 2020-12-03
+ * @brief Main executable (header file)
+ * @file src/server.h
+ * @author Lorenz Stechauner
+ * @date 2020-12-03
  */
 
 #ifndef SESIMOS_SERVER_H
@@ -10,6 +11,7 @@
 
 #include <sys/time.h>
 #include <maxminddb.h>
+#include <signal.h>
 
 #define NUM_SOCKETS 2
 #define MAX_CHILDREN 1024
@@ -25,7 +27,7 @@ extern int sockets[NUM_SOCKETS];
 extern pid_t children[MAX_CHILDREN];
 extern MMDB_s mmdbs[MAX_MMDB];
 
-extern int server_keep_alive;
+extern volatile sig_atomic_t server_keep_alive;
 extern char *log_client_prefix, *log_conn_prefix, *log_req_prefix, *client_geoip;
 extern char *client_addr_str, *client_addr_str_ptr, *server_addr_str, *server_addr_str_ptr, *client_host_str;
 extern struct timeval client_timeout;

test/mock_socket.c

@@ -0,0 +1,28 @@
+
+#include <stdio.h>
+#include <errno.h>
+
+#include "mock_socket.h"
+
+int mock_socket_send_mode;
+
+static int sockets[256] = {0};
+static int n_sockets = 0;
+
+int mock_socket(int domain, int type, int protocol) {
+    printf("SOCKET\n");
+    return (n_sockets++) + 100;
+}
+
+ssize_t mock_send(int fd, const void *buf, size_t n, int flags) {
+    printf("SEND\n");
+    if (mock_socket_send_mode == MOCK_SOCKET_MODE_EINTR) {
+        errno = EINTR;
+        return rand() % ((ssize_t) n) - 1;
+    } else if (mock_socket_send_mode == MOCK_SOCKET_MODE_CLOSED) {
+        errno = 0; // TODO
+        return -1;
+    }
+
+    return (ssize_t) n;
+}

test/mock_socket.h

@@ -0,0 +1,20 @@
+
+#ifndef SESIMOS_MOCK_SOCKET_H
+#define SESIMOS_MOCK_SOCKET_H
+
+#include <stdlib.h>
+
+#define MOCK_SOCKET_MODE_SUCCESS 0
+#define MOCK_SOCKET_MODE_EINTR 1
+#define MOCK_SOCKET_MODE_CLOSED 2
+
+#define socket(args...) mock_socket(args)
+#define send(args...) mock_send(args)
+
+extern int mock_socket_send_mode;
+
+int mock_socket(int domain, int type, int protocol);
+
+ssize_t mock_send(int fd, const void *buf, size_t n, int flags);
+
+#endif //SESIMOS_MOCK_SOCKET_H

test/mock_ssl.c

@@ -0,0 +1,33 @@
+
+#include <openssl/crypto.h>
+
+
+int SSL_write(SSL *ssl, const void *buf, int num) {
+    return num;
+}
+
+int SSL_read(SSL *ssl, void *buf, int num) {
+    return num;
+}
+
+int SSL_peek(SSL *ssl, void *buf, int num) {
+    return num;
+}
+
+int SSL_get_error(const SSL *s, int ret_code) {
+    return 0;
+}
+
+const char *ERR_reason_error_string(unsigned long e) {
+    return "";
+}
+
+int SSL_shutdown(SSL *s) {
+    return 0;
+}
+
+void SSL_free(SSL *ssl) {}
+
+unsigned long ERR_get_error(void) {
+    return 0;
+}

test/test_sock.c

@@ -0,0 +1,15 @@
+
+#include <criterion/criterion.h>
+#include "mock_socket.h"
+#include "../src/lib/sock.h"
+
+
+Test(sock, sock_send_1) {
+    int fd = socket(AF_INET6, SOCK_STREAM, 0);
+    sock s;
+    s.enc = 0;
+    s.socket = fd;
+
+    long ret = sock_send(&s, "Hello", 5, 0);
+    cr_assert_eq(ret, 5);
+}

test/test_utils.c

@@ -0,0 +1,86 @@
+
+#include <criterion/criterion.h>
+#include <criterion/parameterized.h>
+
+#include "../src/lib/utils.h"
+
+struct url_encode_t {
+    long in_size;
+    char in[256];
+    long exp_size;
+    char exp[256];
+};
+
+struct format_duration_t {
+    unsigned long micros;
+    char exp[16];
+};
+
+ParameterizedTestParameters(utils, url_encode) {
+    static struct url_encode_t params[] = {
+            {0, "", 0, ""},
+            {9, "Test Text", 11, "Test%20Text"},
+            {21, "Text\0with\0null\0bytes\0", 29, "Text%00with%00null%00bytes%00"},
+            {59, "Text&with+some/strange_symbols-or#something?I%don't|know...", 59, "Text&with+some/strange_symbols-or#something?I%don't|know..."},
+            {33, "Data\x12With\x13Some" "\xFF" "Control" "\xFE" "Characters", 41, "Data%12With%13Some%FFControl%FECharacters"}
+    };
+    return cr_make_param_array(struct url_encode_t, params, sizeof(params) / sizeof(struct url_encode_t));
+}
+
+ParameterizedTest(struct url_encode_t *param, utils, url_encode) {
+    char out[256];
+    cr_assert_eq(url_encode(param->in, param->in_size, out, sizeof(out)), param->exp_size);
+    cr_assert_arr_eq(out, param->exp, param->exp_size + 1);
+}
+
+Test(utils, url_encode_bytes) {
+    char out[4];
+    char exp[4];
+
+    for (int i = 0; i < 256; i++) {
+        unsigned char ch = i;
+        if (ch <= 0x20 || ch >= 0x7F) {
+            cr_assert_eq(url_encode(&ch, 1, out, sizeof(out)), 3);
+            sprintf(exp, "%%%02X", ch);
+            cr_assert_str_eq(out, exp);
+        } else {
+            cr_assert_eq(url_encode(&ch, 1, out, sizeof(out)), 1);
+            sprintf(exp, "%c", ch);
+            cr_assert_str_eq(out, exp);
+        }
+    }
+}
+
+Test(utils, url_encode_invalid) {
+    cr_assert_eq(url_encode("Hello", 5, NULL, 0), 5);
+}
+
+ParameterizedTestParameters(utils, format_duration) {
+    static struct format_duration_t params[] = {
+            {0, "0.0 ms"},
+            {1, "0.0 ms"},
+            {90, "0.1 ms"},
+            {100, "0.1 ms"},
+            {110, "0.1 ms"},
+            {900, "0.9 ms"},
+            {1000, "1.0 ms"},
+            {9000, "9.0 ms"},
+            {9899, "9.9 ms"},
+            {9999, "10.0 ms"},
+            {10000, "10 ms"},
+            {11999, "12 ms"},
+            {999999, "1.0 s"},
+            {1000000, "1.0 s"},
+            {3000000, "3.0 s"},
+            {1000000 * 60, "1.0 min"},
+            {1000000 * 60 * 30L - 30000000, "29.5 min"},
+            {1000000 * 60 * 60L, "60.0 min"},
+            {1000000 * 60 * 120L, "120 min"},
+    };
+    return cr_make_param_array(struct format_duration_t, params, sizeof(params) / sizeof(struct format_duration_t));
+}
+
+ParameterizedTest(struct format_duration_t *param, utils, format_duration) {
+    char buf[16];
+    cr_assert_str_eq(format_duration(param->micros, buf), param->exp);
+}