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libpsyc/test/testServer.c

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/**
* libpsyc test server for packet parsing & rendering
*
* based on selectserver.c from http://beej.us/guide/bgnet/
* "The C source code presented in this document is hereby granted to the public domain, and is completely free of any license restriction."
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define __USE_POSIX
#include <netdb.h>
#include <math.h>
#include <assert.h>
#include <psyc.h>
#include <psyc/parser.h>
#include <psyc/render.h>
#include <psyc/syntax.h>
const size_t RECV_BUF_SIZE = 8 * 1024;
const size_t CONT_BUF_SIZE = 8 * 1024;
const size_t SEND_BUF_SIZE = 8 * 1024;
const size_t NUM_PARSERS = 100;
// max size for routing & entity header
const size_t ROUTING_LINES = 16;
const size_t ENTITY_LINES = 32;
static inline
void resetString (psycString *s, uint8_t freeptr)
{
if (freeptr && s->length)
free((void*)s->ptr);
s->ptr = NULL;
s->length = 0;
}
// get sockaddr, IPv4 or IPv6:
void *get_in_addr (struct sockaddr *sa)
{
if (sa->sa_family == AF_INET)
return &(((struct sockaddr_in*)sa)->sin_addr);
return &(((struct sockaddr_in6*)sa)->sin6_addr);
}
int main (int argc, char **argv)
{
char *port = argc > 1 ? argv[1] : "4440";
uint8_t routing_only = argc > 2 && memchr(argv[2], (int)'r', strlen(argv[2]));
uint8_t verbose = argc > 2 && memchr(argv[2], (int)'v', strlen(argv[2]));
uint8_t parse_multiple = argc > 2 && memchr(argv[2], (int)'m', strlen(argv[2]));
uint8_t progress = argc > 2 && memchr(argv[2], (int)'p', strlen(argv[2]));
uint8_t stats = argc > 2 && memchr(argv[2], (int)'s', strlen(argv[2]));
size_t recv_buf_size = argc > 3 ? atoi(argv[3]) : 0;
if (recv_buf_size <= 0)
recv_buf_size = RECV_BUF_SIZE;
fd_set master; // master file descriptor list
fd_set read_fds; // temp file descriptor list for select()
int fdmax; // maximum file descriptor number
int listener; // listening socket descriptor
int newfd; // newly accept()ed socket descriptor
struct sockaddr_storage remoteaddr; // client address
socklen_t addrlen;
char buf[CONT_BUF_SIZE + RECV_BUF_SIZE]; // cont buf + recv buf: [ ccrrrr]
char *recvbuf = buf + CONT_BUF_SIZE; // recv buf: ^^^^
char *parsebuf; // parse buf: ^^^^^^
char sendbuf[SEND_BUF_SIZE];
size_t nbytes, contbytes = 0;
char remoteIP[INET6_ADDRSTRLEN];
int yes = 1; // for setsockopt() SO_REUSEADDR, below
int i, j, rv;
struct addrinfo hints, *ai, *p;
psycParseState parsers[NUM_PARSERS];
psycPacket packets[NUM_PARSERS];
psycModifier routing[NUM_PARSERS][ROUTING_LINES];
psycModifier entity[NUM_PARSERS][ENTITY_LINES];
psycModifier *mod = NULL;
struct timeval start[NUM_PARSERS], end[NUM_PARSERS];
int ret, retl;
char oper;
psycString name, value, elem;
psycString *pname = NULL, *pvalue = NULL;
psycParseListState listState;
FD_ZERO(&master); // clear the master and temp sets
FD_ZERO(&read_fds);
// get us a socket and bind it
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
if ((rv = getaddrinfo(NULL, port, &hints, &ai)) != 0)
{
fprintf(stderr, "error: %s\n", gai_strerror(rv));
exit(1);
}
for (p = ai; p != NULL; p = p->ai_next)
{
listener = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
if (listener < 0)
continue;
// lose the pesky "address already in use" error message
setsockopt(listener, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int));
if (bind(listener, p->ai_addr, p->ai_addrlen) < 0)
{
close(listener);
continue;
}
break;
}
// if we got here, it means we didn't get bound
if (p == NULL)
{
fprintf(stderr, "failed to bind\n");
exit(2);
}
freeaddrinfo(ai); // all done with this
// listen
if (listen(listener, 10) == -1)
{
perror("listen");
exit(3);
}
// add the listener to the master set
FD_SET(listener, &master);
// keep track of the biggest file descriptor
fdmax = listener; // so far, it's this one
// main loop
for (;;)
{
read_fds = master; // copy it
if (select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1)
{
perror("select");
exit(4);
}
// run through the existing connections looking for data to read
for (i = 0; i <= fdmax; i++)
{
if (FD_ISSET(i, &read_fds)) // we got one!!
{
if (i == listener)
{
// handle new connections
if (fdmax == NUM_PARSERS - 1)
continue; // ignore if there's too many
addrlen = sizeof remoteaddr;
newfd = accept(listener, (struct sockaddr *)&remoteaddr, &addrlen);
if (newfd == -1)
perror("accept");
else
{
FD_SET(newfd, &master); // add to master set
if (newfd > fdmax) // keep track of the max
fdmax = newfd;
// reset parser state & packet
if (routing_only)
psyc_initParseState2(&parsers[newfd], PSYC_PARSE_ROUTING_ONLY);
else
psyc_initParseState(&parsers[newfd]);
memset(&packets[newfd], 0, sizeof(psycPacket));
memset(&routing[newfd], 0, sizeof(psycModifier) * ROUTING_LINES);
memset(&entity[newfd], 0, sizeof(psycModifier) * ENTITY_LINES);
packets[newfd].routing.modifiers = routing[newfd];
packets[newfd].entity.modifiers = entity[newfd];
printf("# New connection from %s on socket %d\n",
inet_ntop(remoteaddr.ss_family,
get_in_addr((struct sockaddr*)&remoteaddr),
remoteIP, INET6_ADDRSTRLEN),
newfd);
if (stats)
gettimeofday(&start[newfd], NULL);
}
}
else
{
// handle data from a client
if ((nbytes = recv(i, recvbuf, recv_buf_size, 0)) <= 0)
{
if (stats)
printf("%ld ms\n", (end[i].tv_sec * 1000000 + end[i].tv_usec - start[i].tv_sec * 1000000 - start[i].tv_usec) / 1000);
// got error or connection closed by client
if (nbytes == 0) // connection closed
printf("socket %d hung up\n", i);
else
perror("recv");
close(i); // bye!
FD_CLR(i, &master); // remove from master set
}
else
{
// we got some data from a client
parsebuf = recvbuf - contbytes;
psyc_setParseBuffer(&parsers[i], psyc_newString(parsebuf, contbytes + nbytes));
contbytes = 0;
oper = 0;
name.length = 0;
value.length = 0;
do
{
ret = psyc_parse(&parsers[i], &oper, &name, &value);
if (verbose)
printf("# ret = %d\n", ret);
switch (ret) {
case PSYC_PARSE_ROUTING:
assert(packets[i].routing.lines < ROUTING_LINES);
mod = &(packets[i].routing.modifiers[packets[i].routing.lines]);
pname = &mod->name;
pvalue = &mod->value;
mod->flag = PSYC_MODIFIER_ROUTING;
packets[i].routing.lines++;
break;
case PSYC_PARSE_ENTITY_INCOMPLETE:
case PSYC_PARSE_ENTITY:
assert(packets[i].entity.lines < ENTITY_LINES);
mod = &(packets[i].entity.modifiers[packets[i].entity.lines]);
pname = &mod->name;
pvalue = &mod->value;
if (ret == PSYC_PARSE_ENTITY)
{
packets[i].entity.lines++;
mod->flag = psyc_isParseValueLengthFound(&parsers[i]) ?
PSYC_MODIFIER_NEED_LENGTH : PSYC_MODIFIER_NO_LENGTH;
}
break;
case PSYC_PARSE_BODY_INCOMPLETE:
case PSYC_PARSE_BODY:
pname = &(packets[i].method);
pvalue = &(packets[i].data);
break;
case PSYC_PARSE_COMPLETE:
if (verbose)
printf("# Done parsing.\n");
else if (progress)
write(1, ".", 1);
if (!parse_multiple) // parse multiple packets?
ret = -1;
packets[i].flag = psyc_isParseContentLengthFound(&parsers[i]) ?
PSYC_PACKET_NEED_LENGTH : PSYC_PACKET_NO_LENGTH;
if (routing_only)
{
packets[i].content = packets[i].data;
resetString(&packets[i].data, 0);
}
psyc_setPacketLength(&packets[i]);
if (psyc_render(&packets[i], sendbuf, SEND_BUF_SIZE) == PSYC_RENDER_SUCCESS)
{
if (send(i, sendbuf, packets[i].length, 0) == -1)
{
perror("send error");
ret = -1;
}
}
else
{
perror("render error");
ret = -1;
}
// reset packet
packets[i].routingLength = 0;
packets[i].contentLength = 0;
packets[i].length = 0;
packets[i].flag = 0;
for (j = 0; j < packets[i].routing.lines; j++)
{
resetString(&packets[i].routing.modifiers[j].name, 1);
resetString(&packets[i].routing.modifiers[j].value, 1);
}
packets[i].routing.lines = 0;
if (routing_only)
{
resetString(&packets[i].content, 1);
}
else
{
for (j = 0; j < packets[i].entity.lines; j++)
{
resetString(&packets[i].entity.modifiers[j].name, 1);
resetString(&packets[i].entity.modifiers[j].value, 1);
}
packets[i].entity.lines = 0;
resetString(&packets[i].method, 1);
resetString(&packets[i].data, 1);
}
break;
case PSYC_PARSE_INSUFFICIENT:
if (verbose)
printf("# Insufficient data.\n");
contbytes = psyc_getParseRemainingLength(&parsers[i]);
if (contbytes > 0) // copy end of parsebuf before start of recvbuf
{
assert(recvbuf - contbytes >= buf); // make sure it's still in the buffer
memmove(recvbuf - contbytes, psyc_getParseRemainingBuffer(&parsers[i]), contbytes);
}
ret = 0;
break;
default:
printf("# Error while parsing: %i\n", ret);
ret = -1;
}
switch (ret)
{
case PSYC_PARSE_ENTITY_INCOMPLETE:
case PSYC_PARSE_BODY_INCOMPLETE:
ret = 0;
case PSYC_PARSE_ENTITY:
case PSYC_PARSE_ROUTING:
case PSYC_PARSE_BODY:
if (oper)
{
mod->oper = oper;
if (verbose)
printf("%c", oper);
}
if (name.length)
{
pname->ptr = malloc(name.length);
pname->length = name.length;
assert(pname->ptr != NULL);
memcpy((void*)pname->ptr, name.ptr, name.length);
name.length = 0;
if (verbose)
printf("%.*s = ", (int)pname->length, pname->ptr);
}
if (value.length) {
if (!pvalue->length)
pvalue->ptr = malloc(parsers[i].valueLength ? parsers[i].valueLength : value.length);
assert(pvalue->ptr != NULL);
memcpy((void*)pvalue->ptr + pvalue->length, value.ptr, value.length);
pvalue->length += value.length;
value.length = 0;
if (verbose)
{
printf("[%.*s]", (int)pvalue->length, pvalue->ptr);
if (parsers[i].valueLength > pvalue->length)
printf("...");
printf("\n");
}
}
else if (verbose)
printf("\n");
if (verbose)
printf("\t\t\t\t\t\t\t\t# n:%ld v:%ld c:%ld r:%ld\n",
pname->length, pvalue->length,
parsers[i].contentParsed, parsers[i].routingLength);
}
switch (ret)
{
case PSYC_PARSE_ROUTING:
case PSYC_PARSE_ENTITY:
if (pname->length >= 5 && memcmp(pname->ptr, "_list", 5) == 0)
{
if (verbose)
printf("## LIST START\n");
psyc_initParseListState(&listState);
psyc_setParseListBuffer(&listState, *pvalue);
do
{
retl = psyc_parseList(&listState, pname, pvalue, &elem);
switch (retl)
{
case PSYC_PARSE_LIST_END:
retl = 0;
case PSYC_PARSE_LIST_ELEM:
if (verbose)
{
printf("|%.*s\n", (int)elem.length, elem.ptr);
if (ret == PSYC_PARSE_LIST_END)
printf("## LIST END");
}
break;
default:
printf("# Error while parsing list: %i\n", ret);
ret = retl = -1;
}
}
while (retl > 0);
}
}
}
while (ret > 0);
if (progress)
write(1, " ", 1);
if (stats)
gettimeofday(&end[i], NULL);
if (ret < 0)
{
printf("# Closing connection: %i\n", i);
close(i); // bye!
FD_CLR(i, &master); // remove from master set
}
}
} // END handle data from client
} // END got new incoming connection
} // END looping through file descriptors
} // END for(;;)--and you thought it would never end!
return 0;
}
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