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/* Copyright 2016 Luke Shumaker */
#include <error.h>
#include <errno.h>
#include <netdb.h> /* for {get,free}addrinfo() */
#include <stdlib.h> /* for EXIT_FAILURE */
#include <sys/socket.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/stat.h> /* for open */
#include <fcntl.h> /* for open */
#include "util.h"
#include "multipart-replace.h"
struct httpfile {
char name[256];
struct multipart_replace_stream *stream;
};
size_t filec = 0;
struct httpfile *filev = NULL;
struct reader_thread_args {
struct multipart_replace_stream *stream;
int fd;
const char *boundary;
};
void *reader_thread(void *args_anon) {
struct reader_thread_args *args = args_anon;
multipart_replace_reader(args->stream, args->fd, args->boundary);
error(EXIT_FAILURE, 0, "multipart_replace stream ended");
return NULL;
}
void start_multipart_replace_reader(struct multipart_replace_stream *s, int fd, const char *boundary) {
struct reader_thread_args *args = xrealloc(NULL, sizeof(struct reader_thread_args));
args->stream = s;
args->fd = fd;
args->boundary = boundary;
pthread_t thread;
pthread_create(&thread, NULL, reader_thread, args);
}
void file_add(const char *filename) {
struct multipart_replace_stream *stream = xrealloc(NULL, sizeof(struct multipart_replace_stream));
init_multipart_replace_stream(stream);
int fd = open(filename, O_RDONLY);
if (fd < 0)
error(EXIT_FAILURE, errno, "opening file: %s", filename);
filev = xrealloc(filev, (++filec)*sizeof(*filev));
const char *shortname = strrchr(filename, '/');
if (shortname == NULL)
shortname = filename;
strncpy(filev[filec-1].name, shortname, sizeof(filev[filec-1].name));
error(0, 0, "added file #%zd: %s", filec-1, filev[filec-1].name);
filev[filec-1].stream = stream;
start_multipart_replace_reader(stream, fd, "ffserver" /* FIXME */);
}
struct multipart_replace_stream *file_get(const char *filename) {
for (size_t i = 0; i < filec; i++) {
if (strncmp(filename, filev[i].name, sizeof(filev[i].name)) == 0) {
return filev[i].stream;
}
}
return NULL;
}
int tcp4_parse_listen(const char *port) {
int r;
struct addrinfo *addr = NULL;
struct addrinfo hints = { 0 };
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
if ((r = getaddrinfo(NULL, port, &hints, &addr)) != 0)
error(EXIT_FAILURE, r, _("Could not resolve TCP4 port %s"), port);
int sock = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
if (sock < 0)
error(EXIT_FAILURE, errno, _("Could not create a TCP4 socket"));
int yes = 1;
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes));
if (bind(sock, addr->ai_addr, addr->ai_addrlen) < 0)
error(EXIT_FAILURE, errno, _("Could not bind to TCP4 port %s"), port);
if (listen(sock, 5) < 0)
error(EXIT_FAILURE, errno, _("Could not listen on TCP4 port %s"), port);
freeaddrinfo(addr);
return sock;
}
void connection_handler(int fd) {
FILE *netstream = fdopen(fd, "r");
char *line_buf = NULL;
size_t line_cap = 0;
ssize_t line_len = 0;
line_len = getline(&line_buf, &line_cap, netstream);
/* expect line to be "GET /path.mjpg HTTP/1.1" */
if (strncmp(line_buf, "GET ", 4) != 0) {
dprintf(fd,
"HTTP/1.1 405 Method Not Allowed\r\n"
"Allow: GET\r\n"
"\r\n");
close(fd);
return;
}
char *version = &line_buf[4];
char *path = strsep(&version, " ");
if (strcmp(version, "HTTP/1.1\r\n") != 0 && strcmp(version, "HTTP/1.0\r\n")) {
close(fd);
return;
}
path = strdupa(path);
/* run through the rest of the headers */
while (strcmp(line_buf, "\r\n") != 0 && line_len >= 0)
line_len = getline(&line_buf, &line_cap, netstream);
struct multipart_replace_stream *vidstream = file_get(path);
if (vidstream == NULL) {
error(0, 0, "404 %s", path);
dprintf(fd,
"HTTP/1.1 404 Not Found\r\n"
"\r\n");
return;
}
const char *boundary = "boundary" /* FIXME */;
error(0, 0, "200 %s", path);
dprintf(fd,
"HTTP/1.1 200 OK\r\n"
"Content-Type: multipart/x-mixed-replace;boundary=%s\r\n"
"\r\n",
boundary);
multipart_replace_writer(vidstream, fd, boundary);
close(fd);
}
void *connection_thread(void *arg_anon) {
int fd = (int)(intptr_t)arg_anon;
error(0, 0, "Connection %d opened", fd);
connection_handler(fd);
error(0, 0, "Connection %d closed", fd);
return NULL;
}
void usage() {
printf("Usage: %s [-h] PORT [FILENAME...]\n", program_invocation_name);
}
int main(int argc, char *argv[]) {
if (argc < 2) {
dup2(2, 1);
usage();
return EXIT_FAILURE;
}
if (strcmp(argv[1], "-h") == 0) {
usage();
return EXIT_SUCCESS;
}
int sock = tcp4_parse_listen(argv[1]);
for (int i = 2; i < argc; i++)
file_add(argv[i]);
signal(SIGPIPE, SIG_IGN);
while (1) {
int conn = accept(sock, NULL, NULL);
if (conn < 0)
continue;
pthread_t thread;
pthread_create(&thread, NULL, connection_thread, (void*)(intptr_t)conn);
}
return 0;
}
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