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-rw-r--r--package/uhttpd/src/uhttpd.c1288
1 files changed, 1288 insertions, 0 deletions
diff --git a/package/uhttpd/src/uhttpd.c b/package/uhttpd/src/uhttpd.c
new file mode 100644
index 000000000..1efcbf0f5
--- /dev/null
+++ b/package/uhttpd/src/uhttpd.c
@@ -0,0 +1,1288 @@
+/*
+ * uhttpd - Tiny single-threaded httpd - Main component
+ *
+ * Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define _XOPEN_SOURCE 500 /* crypt() */
+
+#include "uhttpd.h"
+#include "uhttpd-utils.h"
+#include "uhttpd-file.h"
+
+#ifdef HAVE_CGI
+#include "uhttpd-cgi.h"
+#endif
+
+#ifdef HAVE_LUA
+#include "uhttpd-lua.h"
+#endif
+
+#ifdef HAVE_TLS
+#include "uhttpd-tls.h"
+#endif
+
+
+const char * http_methods[] = { "GET", "POST", "HEAD", };
+const char * http_versions[] = { "HTTP/0.9", "HTTP/1.0", "HTTP/1.1", };
+
+static int run = 1;
+
+static void uh_sigterm(int sig)
+{
+ run = 0;
+}
+
+static void uh_config_parse(struct config *conf)
+{
+ FILE *c;
+ char line[512];
+ char *col1 = NULL;
+ char *col2 = NULL;
+ char *eol = NULL;
+
+ const char *path = conf->file ? conf->file : "/etc/httpd.conf";
+
+
+ if ((c = fopen(path, "r")) != NULL)
+ {
+ memset(line, 0, sizeof(line));
+
+ while (fgets(line, sizeof(line) - 1, c))
+ {
+ if ((line[0] == '/') && (strchr(line, ':') != NULL))
+ {
+ if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
+ !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
+ !(eol = strchr(col2, '\n')) || (*eol++ = 0))
+ {
+ continue;
+ }
+
+ if (!uh_auth_add(line, col1, col2))
+ {
+ fprintf(stderr,
+ "Notice: No password set for user %s, ignoring "
+ "authentication on %s\n", col1, line
+ );
+ }
+ }
+ else if (!strncmp(line, "I:", 2))
+ {
+ if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
+ !(eol = strchr(col1, '\n')) || (*eol++ = 0))
+ {
+ continue;
+ }
+
+ conf->index_file = strdup(col1);
+ }
+ else if (!strncmp(line, "E404:", 5))
+ {
+ if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
+ !(eol = strchr(col1, '\n')) || (*eol++ = 0))
+ {
+ continue;
+ }
+
+ conf->error_handler = strdup(col1);
+ }
+#ifdef HAVE_CGI
+ else if ((line[0] == '*') && (strchr(line, ':') != NULL))
+ {
+ if (!(col1 = strchr(line, '*')) || (*col1++ = 0) ||
+ !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
+ !(eol = strchr(col2, '\n')) || (*eol++ = 0))
+ {
+ continue;
+ }
+
+ if (!uh_interpreter_add(col1, col2))
+ {
+ fprintf(stderr,
+ "Unable to add interpreter %s for extension %s: "
+ "Out of memory\n", col2, col1
+ );
+ }
+ }
+#endif
+ }
+
+ fclose(c);
+ }
+}
+
+static void uh_listener_cb(struct uloop_fd *u, unsigned int events);
+
+static int uh_socket_bind(const char *host, const char *port,
+ struct addrinfo *hints, int do_tls,
+ struct config *conf)
+{
+ int sock = -1;
+ int yes = 1;
+ int status;
+ int bound = 0;
+
+ int tcp_ka_idl, tcp_ka_int, tcp_ka_cnt;
+
+ struct listener *l = NULL;
+ struct addrinfo *addrs = NULL, *p = NULL;
+
+ if ((status = getaddrinfo(host, port, hints, &addrs)) != 0)
+ {
+ fprintf(stderr, "getaddrinfo(): %s\n", gai_strerror(status));
+ }
+
+ /* try to bind a new socket to each found address */
+ for (p = addrs; p; p = p->ai_next)
+ {
+ /* get the socket */
+ if ((sock = socket(p->ai_family, p->ai_socktype, p->ai_protocol)) == -1)
+ {
+ perror("socket()");
+ goto error;
+ }
+
+ /* "address already in use" */
+ if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)))
+ {
+ perror("setsockopt()");
+ goto error;
+ }
+
+ /* TCP keep-alive */
+ if (conf->tcp_keepalive > 0)
+ {
+ tcp_ka_idl = 1;
+ tcp_ka_cnt = 3;
+ tcp_ka_int = conf->tcp_keepalive;
+
+ if (setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, &yes, sizeof(yes)) ||
+ setsockopt(sock, SOL_TCP, TCP_KEEPIDLE, &tcp_ka_idl, sizeof(tcp_ka_idl)) ||
+ setsockopt(sock, SOL_TCP, TCP_KEEPINTVL, &tcp_ka_int, sizeof(tcp_ka_int)) ||
+ setsockopt(sock, SOL_TCP, TCP_KEEPCNT, &tcp_ka_cnt, sizeof(tcp_ka_cnt)))
+ {
+ fprintf(stderr, "Notice: Unable to enable TCP keep-alive: %s\n",
+ strerror(errno));
+ }
+ }
+
+ /* required to get parallel v4 + v6 working */
+ if (p->ai_family == AF_INET6)
+ {
+ if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &yes, sizeof(yes)) == -1)
+ {
+ perror("setsockopt()");
+ goto error;
+ }
+ }
+
+ /* bind */
+ if (bind(sock, p->ai_addr, p->ai_addrlen) == -1)
+ {
+ perror("bind()");
+ goto error;
+ }
+
+ /* listen */
+ if (listen(sock, UH_LIMIT_CLIENTS) == -1)
+ {
+ perror("listen()");
+ goto error;
+ }
+
+ /* add listener to global list */
+ if (!(l = uh_listener_add(sock, conf)))
+ {
+ fprintf(stderr, "uh_listener_add(): Failed to allocate memory\n");
+ goto error;
+ }
+
+#ifdef HAVE_TLS
+ /* init TLS */
+ l->tls = do_tls ? conf->tls : NULL;
+#endif
+
+ /* add socket to uloop */
+ fd_cloexec(sock);
+ uh_ufd_add(&l->fd, uh_listener_cb, ULOOP_READ);
+
+ bound++;
+ continue;
+
+ error:
+ if (sock > 0)
+ close(sock);
+ }
+
+ freeaddrinfo(addrs);
+
+ return bound;
+}
+
+static struct http_request * uh_http_header_parse(struct client *cl,
+ char *buffer, int buflen)
+{
+ char *method = buffer;
+ char *path = NULL;
+ char *version = NULL;
+
+ char *headers = NULL;
+ char *hdrname = NULL;
+ char *hdrdata = NULL;
+
+ int i;
+ int hdrcount = 0;
+
+ struct http_request *req = &cl->request;
+
+
+ /* terminate initial header line */
+ if ((headers = strfind(buffer, buflen, "\r\n", 2)) != NULL)
+ {
+ buffer[buflen-1] = 0;
+
+ *headers++ = 0;
+ *headers++ = 0;
+
+ /* find request path */
+ if ((path = strchr(buffer, ' ')) != NULL)
+ *path++ = 0;
+
+ /* find http version */
+ if ((path != NULL) && ((version = strchr(path, ' ')) != NULL))
+ *version++ = 0;
+
+
+ /* check method */
+ if (method && !strcmp(method, "GET"))
+ req->method = UH_HTTP_MSG_GET;
+ else if (method && !strcmp(method, "POST"))
+ req->method = UH_HTTP_MSG_POST;
+ else if (method && !strcmp(method, "HEAD"))
+ req->method = UH_HTTP_MSG_HEAD;
+ else
+ {
+ /* invalid method */
+ uh_http_response(cl, 405, "Method Not Allowed");
+ return NULL;
+ }
+
+ /* check path */
+ if (!path || !strlen(path))
+ {
+ /* malformed request */
+ uh_http_response(cl, 400, "Bad Request");
+ return NULL;
+ }
+ else
+ {
+ req->url = path;
+ }
+
+ /* check version */
+ if (version && !strcmp(version, "HTTP/0.9"))
+ req->version = UH_HTTP_VER_0_9;
+ else if (version && !strcmp(version, "HTTP/1.0"))
+ req->version = UH_HTTP_VER_1_0;
+ else if (version && !strcmp(version, "HTTP/1.1"))
+ req->version = UH_HTTP_VER_1_1;
+ else
+ {
+ /* unsupported version */
+ uh_http_response(cl, 400, "Bad Request");
+ return NULL;
+ }
+
+ D("SRV: %s %s %s\n",
+ http_methods[req->method], req->url, http_versions[req->version]);
+
+ /* process header fields */
+ for (i = (int)(headers - buffer); i < buflen; i++)
+ {
+ /* found eol and have name + value, push out header tuple */
+ if (hdrname && hdrdata && (buffer[i] == '\r' || buffer[i] == '\n'))
+ {
+ buffer[i] = 0;
+
+ /* store */
+ if ((hdrcount + 1) < array_size(req->headers))
+ {
+ D("SRV: HTTP: %s: %s\n", hdrname, hdrdata);
+
+ req->headers[hdrcount++] = hdrname;
+ req->headers[hdrcount++] = hdrdata;
+
+ hdrname = hdrdata = NULL;
+ }
+
+ /* too large */
+ else
+ {
+ D("SRV: HTTP: header too big (too many headers)\n");
+ uh_http_response(cl, 413, "Request Entity Too Large");
+ return NULL;
+ }
+ }
+
+ /* have name but no value and found a colon, start of value */
+ else if (hdrname && !hdrdata &&
+ ((i+1) < buflen) && (buffer[i] == ':'))
+ {
+ buffer[i] = 0;
+ hdrdata = &buffer[i+1];
+
+ while ((hdrdata + 1) < (buffer + buflen) && *hdrdata == ' ')
+ hdrdata++;
+ }
+
+ /* have no name and found [A-Za-z], start of name */
+ else if (!hdrname && isalpha(buffer[i]))
+ {
+ hdrname = &buffer[i];
+ }
+ }
+
+ /* valid enough */
+ req->redirect_status = 200;
+ return req;
+ }
+
+ /* Malformed request */
+ uh_http_response(cl, 400, "Bad Request");
+ return NULL;
+}
+
+
+static struct http_request * uh_http_header_recv(struct client *cl)
+{
+ char *bufptr = cl->httpbuf.buf;
+ char *idxptr = NULL;
+
+ ssize_t blen = sizeof(cl->httpbuf.buf)-1;
+ ssize_t rlen = 0;
+
+ memset(bufptr, 0, sizeof(cl->httpbuf.buf));
+
+ while (blen > 0)
+ {
+ /* receive data */
+ ensure_out(rlen = uh_tcp_recv(cl, bufptr, blen));
+ D("SRV: Client(%d) peek(%d) = %d\n", cl->fd.fd, blen, rlen);
+
+ if (rlen <= 0)
+ {
+ D("SRV: Client(%d) dead [%s]\n", cl->fd.fd, strerror(errno));
+ return NULL;
+ }
+
+ blen -= rlen;
+ bufptr += rlen;
+
+ if ((idxptr = strfind(cl->httpbuf.buf, sizeof(cl->httpbuf.buf),
+ "\r\n\r\n", 4)))
+ {
+ /* header read complete ... */
+ cl->httpbuf.ptr = idxptr + 4;
+ cl->httpbuf.len = bufptr - cl->httpbuf.ptr;
+
+ return uh_http_header_parse(cl, cl->httpbuf.buf,
+ (cl->httpbuf.ptr - cl->httpbuf.buf));
+ }
+ }
+
+ /* request entity too large */
+ D("SRV: HTTP: header too big (buffer exceeded)\n");
+ uh_http_response(cl, 413, "Request Entity Too Large");
+
+out:
+ return NULL;
+}
+
+#if defined(HAVE_LUA) || defined(HAVE_CGI)
+static int uh_path_match(const char *prefix, const char *url)
+{
+ if ((strstr(url, prefix) == url) &&
+ ((prefix[strlen(prefix)-1] == '/') ||
+ (strlen(url) == strlen(prefix)) ||
+ (url[strlen(prefix)] == '/')))
+ {
+ return 1;
+ }
+
+ return 0;
+}
+#endif
+
+static bool uh_dispatch_request(struct client *cl, struct http_request *req)
+{
+ struct path_info *pin;
+ struct interpreter *ipr = NULL;
+ struct config *conf = cl->server->conf;
+
+#ifdef HAVE_LUA
+ /* Lua request? */
+ if (conf->lua_state &&
+ uh_path_match(conf->lua_prefix, req->url))
+ {
+ return conf->lua_request(cl, conf->lua_state);
+ }
+ else
+#endif
+
+#ifdef HAVE_UBUS
+ /* ubus request? */
+ if (conf->ubus_state &&
+ uh_path_match(conf->ubus_prefix, req->url))
+ {
+ return conf->ubus_request(cl, conf->ubus_state);
+ }
+ else
+#endif
+
+ /* dispatch request */
+ if ((pin = uh_path_lookup(cl, req->url)) != NULL)
+ {
+ /* auth ok? */
+ if (!pin->redirected && uh_auth_check(cl, req, pin))
+ {
+#ifdef HAVE_CGI
+ if (uh_path_match(conf->cgi_prefix, pin->name) ||
+ (ipr = uh_interpreter_lookup(pin->phys)) != NULL)
+ {
+ return uh_cgi_request(cl, pin, ipr);
+ }
+#endif
+ return uh_file_request(cl, pin);
+ }
+ }
+
+ /* 404 - pass 1 */
+ else
+ {
+ /* Try to invoke an error handler */
+ if ((pin = uh_path_lookup(cl, conf->error_handler)) != NULL)
+ {
+ /* auth ok? */
+ if (uh_auth_check(cl, req, pin))
+ {
+ req->redirect_status = 404;
+#ifdef HAVE_CGI
+ if (uh_path_match(conf->cgi_prefix, pin->name) ||
+ (ipr = uh_interpreter_lookup(pin->phys)) != NULL)
+ {
+ return uh_cgi_request(cl, pin, ipr);
+ }
+#endif
+ return uh_file_request(cl, pin);
+ }
+ }
+
+ /* 404 - pass 2 */
+ else
+ {
+ uh_http_sendhf(cl, 404, "Not Found", "No such file or directory");
+ }
+ }
+
+ return false;
+}
+
+static void uh_socket_cb(struct uloop_fd *u, unsigned int events);
+
+static void uh_listener_cb(struct uloop_fd *u, unsigned int events)
+{
+ int new_fd;
+ struct listener *serv;
+ struct client *cl;
+ struct config *conf;
+
+ struct sockaddr_in6 sa;
+ socklen_t sl = sizeof(sa);
+
+ serv = container_of(u, struct listener, fd);
+ conf = serv->conf;
+
+ /* defer client if maximum number of requests is exceeded */
+ if (serv->n_clients >= conf->max_requests)
+ return;
+
+ /* handle new connections */
+ if ((new_fd = accept(u->fd, (struct sockaddr *)&sa, &sl)) != -1)
+ {
+ D("SRV: Server(%d) accept => Client(%d)\n", u->fd, new_fd);
+
+ /* add to global client list */
+ if ((cl = uh_client_add(new_fd, serv, &sa)) != NULL)
+ {
+ /* add client socket to global fdset */
+ uh_ufd_add(&cl->fd, uh_socket_cb, ULOOP_READ);
+ fd_cloexec(cl->fd.fd);
+
+#ifdef HAVE_TLS
+ /* setup client tls context */
+ if (conf->tls)
+ {
+ if (conf->tls_accept(cl) < 1)
+ {
+ D("SRV: Client(%d) SSL handshake failed, drop\n", new_fd);
+
+ /* remove from global client list */
+ uh_client_remove(cl);
+ return;
+ }
+ }
+#endif
+ }
+
+ /* insufficient resources */
+ else
+ {
+ fprintf(stderr, "uh_client_add(): Cannot allocate memory\n");
+ close(new_fd);
+ }
+ }
+}
+
+static void uh_client_cb(struct client *cl, unsigned int events);
+
+static void uh_rpipe_cb(struct uloop_fd *u, unsigned int events)
+{
+ struct client *cl = container_of(u, struct client, rpipe);
+
+ D("SRV: Client(%d) rpipe readable\n", cl->fd.fd);
+
+ uh_client_cb(cl, ULOOP_WRITE);
+}
+
+static void uh_socket_cb(struct uloop_fd *u, unsigned int events)
+{
+ struct client *cl = container_of(u, struct client, fd);
+
+ D("SRV: Client(%d) socket readable\n", cl->fd.fd);
+
+ uh_client_cb(cl, ULOOP_READ);
+}
+
+static void uh_child_cb(struct uloop_process *p, int rv)
+{
+ struct client *cl = container_of(p, struct client, proc);
+
+ D("SRV: Client(%d) child(%d) dead\n", cl->fd.fd, cl->proc.pid);
+
+ uh_client_cb(cl, ULOOP_READ | ULOOP_WRITE);
+}
+
+static void uh_kill9_cb(struct uloop_timeout *t)
+{
+ struct client *cl = container_of(t, struct client, timeout);
+
+ if (!kill(cl->proc.pid, 0))
+ {
+ D("SRV: Client(%d) child(%d) kill(SIGKILL)...\n",
+ cl->fd.fd, cl->proc.pid);
+
+ kill(cl->proc.pid, SIGKILL);
+ }
+}
+
+static void uh_timeout_cb(struct uloop_timeout *t)
+{
+ struct client *cl = container_of(t, struct client, timeout);
+
+ D("SRV: Client(%d) child(%d) timed out\n", cl->fd.fd, cl->proc.pid);
+
+ if (!kill(cl->proc.pid, 0))
+ {
+ D("SRV: Client(%d) child(%d) kill(SIGTERM)...\n",
+ cl->fd.fd, cl->proc.pid);
+
+ kill(cl->proc.pid, SIGTERM);
+
+ cl->timeout.cb = uh_kill9_cb;
+ uloop_timeout_set(&cl->timeout, 1000);
+ }
+}
+
+static void uh_client_cb(struct client *cl, unsigned int events)
+{
+ int i;
+ struct config *conf;
+ struct http_request *req;
+
+ conf = cl->server->conf;
+
+ D("SRV: Client(%d) enter callback\n", cl->fd.fd);
+
+ /* undispatched yet */
+ if (!cl->dispatched)
+ {
+ /* we have no headers yet and this was a write event, ignore... */
+ if (!(events & ULOOP_READ))
+ {
+ D("SRV: Client(%d) ignoring write event before headers\n", cl->fd.fd);
+ return;
+ }
+
+ /* attempt to receive and parse headers */
+ if (!(req = uh_http_header_recv(cl)))
+ {
+ D("SRV: Client(%d) failed to receive header\n", cl->fd.fd);
+ uh_client_shutdown(cl);
+ return;
+ }
+
+ /* process expect headers */
+ foreach_header(i, req->headers)
+ {
+ if (strcasecmp(req->headers[i], "Expect"))
+ continue;
+
+ if (strcasecmp(req->headers[i+1], "100-continue"))
+ {
+ D("SRV: Client(%d) unknown expect header (%s)\n",
+ cl->fd.fd, req->headers[i+1]);
+
+ uh_http_response(cl, 417, "Precondition Failed");
+ uh_client_shutdown(cl);
+ return;
+ }
+ else
+ {
+ D("SRV: Client(%d) sending HTTP/1.1 100 Continue\n", cl->fd.fd);
+
+ uh_http_sendf(cl, NULL, "HTTP/1.1 100 Continue\r\n\r\n");
+ cl->httpbuf.len = 0; /* client will re-send the body */
+ break;
+ }
+ }
+
+ /* RFC1918 filtering */
+ if (conf->rfc1918_filter &&
+ sa_rfc1918(&cl->peeraddr) && !sa_rfc1918(&cl->servaddr))
+ {
+ uh_http_sendhf(cl, 403, "Forbidden",
+ "Rejected request from RFC1918 IP "
+ "to public server address");
+
+ uh_client_shutdown(cl);
+ return;
+ }
+
+ /* dispatch request */
+ if (!uh_dispatch_request(cl, req))
+ {
+ D("SRV: Client(%d) failed to dispach request\n", cl->fd.fd);
+ uh_client_shutdown(cl);
+ return;
+ }
+
+ /* request handler spawned a pipe, register handler */
+ if (cl->rpipe.fd > -1)
+ {
+ D("SRV: Client(%d) pipe(%d) spawned\n", cl->fd.fd, cl->rpipe.fd);
+
+ uh_ufd_add(&cl->rpipe, uh_rpipe_cb, ULOOP_READ);
+ }
+
+ /* request handler spawned a child, register handler */
+ if (cl->proc.pid)
+ {
+ D("SRV: Client(%d) child(%d) spawned\n", cl->fd.fd, cl->proc.pid);
+
+ cl->proc.cb = uh_child_cb;
+ uloop_process_add(&cl->proc);
+
+ cl->timeout.cb = uh_timeout_cb;
+ uloop_timeout_set(&cl->timeout, conf->script_timeout * 1000);
+ }
+
+ /* header processing complete */
+ D("SRV: Client(%d) dispatched\n", cl->fd.fd);
+ cl->dispatched = true;
+ }
+
+ if (!cl->cb(cl))
+ {
+ D("SRV: Client(%d) response callback signalized EOF\n", cl->fd.fd);
+ uh_client_shutdown(cl);
+ return;
+ }
+}
+
+#ifdef HAVE_TLS
+static inline int uh_inittls(struct config *conf)
+{
+ /* library handle */
+ void *lib;
+
+ /* already loaded */
+ if (conf->tls != NULL)
+ return 0;
+
+ /* load TLS plugin */
+ if (!(lib = dlopen("uhttpd_tls.so", RTLD_LAZY | RTLD_GLOBAL)))
+ {
+ fprintf(stderr,
+ "Notice: Unable to load TLS plugin - disabling SSL support! "
+ "(Reason: %s)\n", dlerror()
+ );
+
+ return 1;
+ }
+ else
+ {
+ /* resolve functions */
+ if (!(conf->tls_init = dlsym(lib, "uh_tls_ctx_init")) ||
+ !(conf->tls_cert = dlsym(lib, "uh_tls_ctx_cert")) ||
+ !(conf->tls_key = dlsym(lib, "uh_tls_ctx_key")) ||
+ !(conf->tls_free = dlsym(lib, "uh_tls_ctx_free")) ||
+ !(conf->tls_accept = dlsym(lib, "uh_tls_client_accept")) ||
+ !(conf->tls_close = dlsym(lib, "uh_tls_client_close")) ||
+ !(conf->tls_recv = dlsym(lib, "uh_tls_client_recv")) ||
+ !(conf->tls_send = dlsym(lib, "uh_tls_client_send")))
+ {
+ fprintf(stderr,
+ "Error: Failed to lookup required symbols "
+ "in TLS plugin: %s\n", dlerror()
+ );
+ exit(1);
+ }
+
+ /* init SSL context */
+ if (!(conf->tls = conf->tls_init()))
+ {
+ fprintf(stderr, "Error: Failed to initalize SSL context\n");
+ exit(1);
+ }
+ }
+
+ return 0;
+}
+#endif
+
+int main (int argc, char **argv)
+{
+ /* working structs */
+ struct addrinfo hints;
+ struct sigaction sa;
+ struct config conf;
+
+ /* maximum file descriptor number */
+ int cur_fd = 0;
+
+#ifdef HAVE_TLS
+ int tls = 0;
+ int keys = 0;
+#endif
+
+ int bound = 0;
+ int nofork = 0;
+
+ /* args */
+ int opt;
+ char addr[128];
+ char *port = NULL;
+
+#if defined(HAVE_LUA) || defined(HAVE_TLS) || defined(HAVE_UBUS)
+ /* library handle */
+ void *lib;
+#endif
+
+ /* handle SIGPIPE, SIGINT, SIGTERM */
+ sa.sa_flags = 0;
+ sigemptyset(&sa.sa_mask);
+
+ sa.sa_handler = SIG_IGN;
+ sigaction(SIGPIPE, &sa, NULL);
+
+ sa.sa_handler = uh_sigterm;
+ sigaction(SIGINT, &sa, NULL);
+ sigaction(SIGTERM, &sa, NULL);
+
+ /* prepare addrinfo hints */
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = AI_PASSIVE;
+
+ /* parse args */
+ memset(&conf, 0, sizeof(conf));
+
+ uloop_init();
+
+ while ((opt = getopt(argc, argv,
+ "fSDRC:K:E:I:p:s:h:c:l:L:d:r:m:n:x:i:t:T:A:u:U:")) > 0)
+ {
+ switch(opt)
+ {
+ /* [addr:]port */
+ case 'p':
+ case 's':
+ memset(addr, 0, sizeof(addr));
+
+ if ((port = strrchr(optarg, ':')) != NULL)
+ {
+ if ((optarg[0] == '[') && (port > optarg) && (port[-1] == ']'))
+ memcpy(addr, optarg + 1,
+ min(sizeof(addr), (int)(port - optarg) - 2));
+ else
+ memcpy(addr, optarg,
+ min(sizeof(addr), (int)(port - optarg)));
+
+ port++;
+ }
+ else
+ {
+ port = optarg;
+ }
+
+#ifdef HAVE_TLS
+ if (opt == 's')
+ {
+ if (uh_inittls(&conf))
+ {
+ fprintf(stderr,
+ "Notice: TLS support is disabled, "
+ "ignoring '-s %s'\n", optarg
+ );
+ continue;
+ }
+
+ tls = 1;
+ }
+#endif
+
+ /* bind sockets */
+ bound += uh_socket_bind(addr[0] ? addr : NULL, port, &hints,
+ (opt == 's'), &conf);
+ break;
+
+#ifdef HAVE_TLS
+ /* certificate */
+ case 'C':
+ if (!uh_inittls(&conf))
+ {
+ if (conf.tls_cert(conf.tls, optarg) < 1)
+ {
+ fprintf(stderr,
+ "Error: Invalid certificate file given\n");
+ exit(1);
+ }
+
+ keys++;
+ }
+
+ break;
+
+ /* key */
+ case 'K':
+ if (!uh_inittls(&conf))
+ {
+ if (conf.tls_key(conf.tls, optarg) < 1)
+ {
+ fprintf(stderr,
+ "Error: Invalid private key file given\n");
+ exit(1);
+ }
+
+ keys++;
+ }
+
+ break;
+#else
+ case 'C':
+ case 'K':
+ fprintf(stderr,
+ "Notice: TLS support not compiled, ignoring -%c\n",
+ opt);
+ break;
+#endif
+
+ /* docroot */
+ case 'h':
+ if (! realpath(optarg, conf.docroot))
+ {
+ fprintf(stderr, "Error: Invalid directory %s: %s\n",
+ optarg, strerror(errno));
+ exit(1);
+ }
+ break;
+
+ /* error handler */
+ case 'E':
+ if ((strlen(optarg) == 0) || (optarg[0] != '/'))
+ {
+ fprintf(stderr, "Error: Invalid error handler: %s\n",
+ optarg);
+ exit(1);
+ }
+ conf.error_handler = optarg;
+ break;
+
+ /* index file */
+ case 'I':
+ if ((strlen(optarg) == 0) || (optarg[0] == '/'))
+ {
+ fprintf(stderr, "Error: Invalid index page: %s\n",
+ optarg);
+ exit(1);
+ }
+ conf.index_file = optarg;
+ break;
+
+ /* don't follow symlinks */
+ case 'S':
+ conf.no_symlinks = 1;
+ break;
+
+ /* don't list directories */
+ case 'D':
+ conf.no_dirlists = 1;
+ break;
+
+ case 'R':
+ conf.rfc1918_filter = 1;
+ break;
+
+ case 'n':
+ conf.max_requests = atoi(optarg);
+ break;
+
+#ifdef HAVE_CGI
+ /* cgi prefix */
+ case 'x':
+ conf.cgi_prefix = optarg;
+ break;
+
+ /* interpreter */
+ case 'i':
+ if ((optarg[0] == '.') && (port = strchr(optarg, '=')))
+ {
+ *port++ = 0;
+ uh_interpreter_add(optarg, port);
+ }
+ else
+ {
+ fprintf(stderr, "Error: Invalid interpreter: %s\n",
+ optarg);
+ exit(1);
+ }
+ break;
+#else
+ case 'x':
+ case 'i':
+ fprintf(stderr,
+ "Notice: CGI support not compiled, ignoring -%c\n",
+ opt);
+ break;
+#endif
+
+#ifdef HAVE_LUA
+ /* lua prefix */
+ case 'l':
+ conf.lua_prefix = optarg;
+ break;
+
+ /* lua handler */
+ case 'L':
+ conf.lua_handler = optarg;
+ break;
+#else
+ case 'l':
+ case 'L':
+ fprintf(stderr,
+ "Notice: Lua support not compiled, ignoring -%c\n",
+ opt);
+ break;
+#endif
+
+#ifdef HAVE_UBUS
+ /* ubus prefix */
+ case 'u':
+ conf.ubus_prefix = optarg;
+ break;
+
+ /* ubus socket */
+ case 'U':
+ conf.ubus_socket = optarg;
+ break;
+#else
+ case 'u':
+ case 'U':
+ fprintf(stderr,
+ "Notice: UBUS support not compiled, ignoring -%c\n",
+ opt);
+ break;
+#endif
+
+#if defined(HAVE_CGI) || defined(HAVE_LUA)
+ /* script timeout */
+ case 't':
+ conf.script_timeout = atoi(optarg);
+ break;
+#endif
+
+ /* network timeout */
+ case 'T':
+ conf.network_timeout = atoi(optarg);
+ break;
+
+ /* tcp keep-alive */
+ case 'A':
+ conf.tcp_keepalive = atoi(optarg);
+ break;
+
+ /* no fork */
+ case 'f':
+ nofork = 1;
+ break;
+
+ /* urldecode */
+ case 'd':
+ if ((port = malloc(strlen(optarg)+1)) != NULL)
+ {
+ /* "decode" plus to space to retain compat */
+ for (opt = 0; optarg[opt]; opt++)
+ if (optarg[opt] == '+')
+ optarg[opt] = ' ';
+ /* opt now contains strlen(optarg) -- no need to re-scan */
+ memset(port, 0, opt+1);
+ if (uh_urldecode(port, opt, optarg, opt) < 0)
+ fprintf(stderr, "uhttpd: invalid encoding\n");
+
+ printf("%s", port);
+ free(port);
+ exit(0);
+ }
+ break;
+
+ /* basic auth realm */
+ case 'r':
+ conf.realm = optarg;
+ break;
+
+ /* md5 crypt */
+ case 'm':
+ printf("%s\n", crypt(optarg, "$1$"));
+ exit(0);
+ break;
+
+ /* config file */
+ case 'c':
+ conf.file = optarg;
+ break;
+
+ default:
+ fprintf(stderr,
+ "Usage: %s -p [addr:]port [-h docroot]\n"
+ " -f Do not fork to background\n"
+ " -c file Configuration file, default is '/etc/httpd.conf'\n"
+ " -p [addr:]port Bind to specified address and port, multiple allowed\n"
+#ifdef HAVE_TLS
+ " -s [addr:]port Like -p but provide HTTPS on this port\n"
+ " -C file ASN.1 server certificate file\n"
+ " -K file ASN.1 server private key file\n"
+#endif
+ " -h directory Specify the document root, default is '.'\n"
+ " -E string Use given virtual URL as 404 error handler\n"
+ " -I string Use given filename as index page for directories\n"
+ " -S Do not follow symbolic links outside of the docroot\n"
+ " -D Do not allow directory listings, send 403 instead\n"
+ " -R Enable RFC1918 filter\n"
+ " -n count Maximum allowed number of concurrent requests\n"
+#ifdef HAVE_LUA
+ " -l string URL prefix for Lua handler, default is '/lua'\n"
+ " -L file Lua handler script, omit to disable Lua\n"
+#endif
+#ifdef HAVE_UBUS
+ " -u string URL prefix for HTTP/JSON handler\n"
+ " -U file Override ubus socket path\n"
+#endif
+#ifdef HAVE_CGI
+ " -x string URL prefix for CGI handler, default is '/cgi-bin'\n"
+ " -i .ext=path Use interpreter at path for files with the given extension\n"
+#endif
+#if defined(HAVE_CGI) || defined(HAVE_LUA) || defined(HAVE_UBUS)
+ " -t seconds CGI, Lua and UBUS script timeout in seconds, default is 60\n"
+#endif
+ " -T seconds Network timeout in seconds, default is 30\n"
+ " -d string URL decode given string\n"
+ " -r string Specify basic auth realm\n"
+ " -m string MD5 crypt given string\n"
+ "\n", argv[0]
+ );
+
+ exit(1);
+ }
+ }
+
+#ifdef HAVE_TLS
+ if ((tls == 1) && (keys < 2))
+ {
+ fprintf(stderr, "Error: Missing private key or certificate file\n");
+ exit(1);
+ }
+#endif
+
+ if (bound < 1)
+ {
+ fprintf(stderr, "Error: No sockets bound, unable to continue\n");
+ exit(1);
+ }
+
+ /* default docroot */
+ if (!conf.docroot[0] && !realpath(".", conf.docroot))
+ {
+ fprintf(stderr, "Error: Can not determine default document root: %s\n",
+ strerror(errno));
+ exit(1);
+ }
+
+ /* default realm */
+ if (!conf.realm)
+ conf.realm = "Protected Area";
+
+ /* config file */
+ uh_config_parse(&conf);
+
+ /* default max requests */
+ if (conf.max_requests <= 0)
+ conf.max_requests = 3;
+
+ /* default network timeout */
+ if (conf.network_timeout <= 0)
+ conf.network_timeout = 30;
+
+#if defined(HAVE_CGI) || defined(HAVE_LUA) || defined(HAVE_UBUS)
+ /* default script timeout */
+ if (conf.script_timeout <= 0)
+ conf.script_timeout = 60;
+#endif
+
+#ifdef HAVE_CGI
+ /* default cgi prefix */
+ if (!conf.cgi_prefix)
+ conf.cgi_prefix = "/cgi-bin";
+#endif
+
+#ifdef HAVE_LUA
+ /* load Lua plugin */
+ if (!(lib = dlopen("uhttpd_lua.so", RTLD_LAZY | RTLD_GLOBAL)))
+ {
+ fprintf(stderr,
+ "Notice: Unable to load Lua plugin - disabling Lua support! "
+ "(Reason: %s)\n", dlerror());
+ }
+ else
+ {
+ /* resolve functions */
+ if (!(conf.lua_init = dlsym(lib, "uh_lua_init")) ||
+ !(conf.lua_close = dlsym(lib, "uh_lua_close")) ||
+ !(conf.lua_request = dlsym(lib, "uh_lua_request")))
+ {
+ fprintf(stderr,
+ "Error: Failed to lookup required symbols "
+ "in Lua plugin: %s\n", dlerror()
+ );
+ exit(1);
+ }
+
+ /* init Lua runtime if handler is specified */
+ if (conf.lua_handler)
+ {
+ /* default lua prefix */
+ if (!conf.lua_prefix)
+ conf.lua_prefix = "/lua";
+
+ conf.lua_state = conf.lua_init(&conf);
+ }
+ }
+#endif
+
+#ifdef HAVE_UBUS
+ /* load ubus plugin */
+ if (!(lib = dlopen("uhttpd_ubus.so", RTLD_LAZY | RTLD_GLOBAL)))
+ {
+ fprintf(stderr,
+ "Notice: Unable to load ubus plugin - disabling ubus support! "
+ "(Reason: %s)\n", dlerror());
+ }
+ else if (conf.ubus_prefix)
+ {
+ /* resolve functions */
+ if (!(conf.ubus_init = dlsym(lib, "uh_ubus_init")) ||
+ !(conf.ubus_close = dlsym(lib, "uh_ubus_close")) ||
+ !(conf.ubus_request = dlsym(lib, "uh_ubus_request")))
+ {
+ fprintf(stderr,
+ "Error: Failed to lookup required symbols "
+ "in ubus plugin: %s\n", dlerror()
+ );
+ exit(1);
+ }
+
+ /* initialize ubus */
+ conf.ubus_state = conf.ubus_init(&conf);
+ }
+#endif
+
+ /* fork (if not disabled) */
+ if (!nofork)
+ {
+ switch (fork())
+ {
+ case -1:
+ perror("fork()");
+ exit(1);
+
+ case 0:
+ /* daemon setup */
+ if (chdir("/"))
+ perror("chdir()");
+
+ if ((cur_fd = open("/dev/null", O_WRONLY)) > -1)
+ dup2(cur_fd, 0);
+
+ if ((cur_fd = open("/dev/null", O_RDONLY)) > -1)
+ dup2(cur_fd, 1);
+
+ if ((cur_fd = open("/dev/null", O_RDONLY)) > -1)
+ dup2(cur_fd, 2);
+
+ break;
+
+ default:
+ exit(0);
+ }
+ }
+
+ /* server main loop */
+ uloop_run();
+
+#ifdef HAVE_LUA
+ /* destroy the Lua state */
+ if (conf.lua_state != NULL)
+ conf.lua_close(conf.lua_state);
+#endif
+
+#ifdef HAVE_UBUS
+ /* destroy the ubus state */
+ if (conf.ubus_state != NULL)
+ conf.ubus_close(conf.ubus_state);
+#endif
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-06 06:36:37 +0000