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#include <stdio.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <errno.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/select.h>
#include "global.h"
#include "line_reader.h"
#include "unzbuffer.h"
static bool writeall(int sock,const char *data,i64 len){
i64 cursor=0;
while(cursor<len){
i64 nwr=write(sock,data+cursor,len-cursor);
if(nwr<=0)return false;
cursor+=nwr;
}
return true;
}
struct frame_process {
pid_t pid;
i64 namelen;
char *name;
i64 usertime,systime,rss;
};
struct data_frame {
struct timeval stamp;
i64 numpids;
struct frame_process *procs;
};
static i64 deserialise8(const u8 *buf){
u64 value=0;
for(i64 i=0;i<8;i++)value|=((u64)buf[i])<<(8*i);
return (i64)value;
}
static i32 deserialise4(const u8 *buf){
u32 value=0;
for(i64 i=0;i<4;i++)value|=((u32)buf[i])<<(8*i);
return (i32)value;
}
static void process_frame(const struct data_frame *frame){
fprintf(stderr,"%s: (%" PRIi64 ")\n",ctime(&frame->stamp.tv_sec),frame->numpids);
}
static i64 read_frame(const u8 *buffer,i64 len){
if(len<20)return 0;
struct data_frame *frame=malloc(1,struct data_frame);
frame->stamp.tv_sec=deserialise8(buffer);
frame->stamp.tv_usec=deserialise4(buffer+8);
i64 numpids=frame->numpids=deserialise8(buffer+12);
i64 cursor=20;
fprintf(stderr,"numpids=%" PRIi64 "\n",numpids);
if(len-cursor<numpids*36){
free(frame);
return 0;
}
// calloc to null unfilled pointers in procs
frame->procs=calloc(numpids,struct frame_process);
i64 pi;
for(pi=0;pi<frame->numpids;pi++){
fprintf(stderr,"pi=%" PRIi64 "\n",pi);
if(len-cursor<36){
fprintf(stderr,"insuff: pi\n");
goto insufficient_data;
}
frame->procs[pi].pid=deserialise4(buffer+cursor);
cursor+=4;
i64 namelen=frame->procs[pi].namelen=deserialise8(buffer+cursor);
cursor+=8;
fprintf(stderr," pid=%d namelen=%" PRIi64 "\n",frame->procs[pi].pid,namelen);
if(len-cursor<namelen+24){
fprintf(stderr,"insuff: namelen\n");
goto insufficient_data;
}
frame->procs[pi].name=malloc(namelen+1,char);
memcpy(frame->procs[pi].name,buffer+cursor,namelen);
cursor+=namelen;
frame->procs[pi].usertime=deserialise8(buffer+cursor);
cursor+=8;
frame->procs[pi].systime=deserialise8(buffer+cursor);
cursor+=8;
frame->procs[pi].rss=deserialise8(buffer+cursor);
cursor+=8;
}
process_frame(frame);
for(i64 i=0;i<numpids;i++)free(frame->procs[i].name);
free(frame->procs);
free(frame);
return cursor;
insufficient_data:
if(frame->procs){
for(i64 i=0;i<=pi;i++){
if(frame->procs[i].name)free(frame->procs[i].name);
}
free(frame->procs);
}
free(frame);
return 0;
}
static void frame_data_sink(u8 *newdata,i64 newdatalen,void *payload){
(void)payload;
static u8 *buffer=NULL;
static i64 buffersize=0,bufferlen=0;
fprintf(stderr,"frame_data_sink(len=%" PRIi64 ")\n",newdatalen);
if(buffer==NULL){
buffersize=4096;
buffer=malloc(buffersize,u8);
}
if(bufferlen+newdatalen>buffersize){
do buffersize*=2; while(bufferlen+newdatalen>buffersize);
buffer=realloc(buffer,buffersize,u8);
}
memcpy(buffer+bufferlen,newdata,newdatalen);
bufferlen+=newdatalen;
i64 cursor=0;
while(cursor<bufferlen){
i64 nr=read_frame(buffer+cursor,bufferlen-cursor);
if(nr<=0)break;
cursor+=nr;
}
if(cursor<bufferlen){
memmove(buffer,buffer+cursor,bufferlen-cursor);
}
bufferlen-=cursor;
}
int main(int argc,char **argv){
if(argc!=2&&argc!=3){
fprintf(stderr,"Usage: %s <ip addr> [port=57575]\n",argv[0]);
return 1;
}
struct addrinfo hints,*res;
memset(&hints,0,sizeof(hints));
hints.ai_family=AF_UNSPEC;
hints.ai_socktype=SOCK_STREAM;
int ret=getaddrinfo(argv[1],argc==3?argv[2]:"57575",&hints,&res);
if(ret!=0){
fprintf(stderr,"getaddrinfo: %s\n",gai_strerror(ret));
return 1;
}
int sock=-1;
for(struct addrinfo *r=res;r!=NULL;r=r->ai_next){
char buf[256];
inet_ntop(r->ai_family,&((struct sockaddr_in*)r->ai_addr)->sin_addr,buf,sizeof buf);
fprintf(stderr,"Trying: %s\n",buf);
sock=socket(r->ai_family,r->ai_socktype,r->ai_protocol);
if(sock<0){
sock=-1;
perror("socket");
continue;
}
if(connect(sock,r->ai_addr,r->ai_addrlen)<0){
close(sock);
sock=-1;
perror("connect");
continue;
}
break;
}
freeaddrinfo(res);
if(sock==-1)return 1;
fprintf(stderr,"Connected.\n");
struct line_reader *liner=line_reader_init(STDIN_FILENO);
struct unzbuffer *z=unzbuffer_init(frame_data_sink,NULL);
bool haderror=false;
while(true){
fd_set inset;
FD_ZERO(&inset);
FD_SET(STDIN_FILENO,&inset);
FD_SET(sock,&inset);
int ret=select(sock+1,&inset,NULL,NULL,NULL);
if(ret<0){
if(errno==EINTR)continue;
perror("select");
break;
}
if(FD_ISSET(STDIN_FILENO,&inset)){
char buf[1024];
i64 nr=read(STDIN_FILENO,buf,sizeof buf);
if(nr<0){
if(errno==EINTR)continue;
perror("read");
break;
}
if(nr==0)break; // EOF
line_reader_supply_data(liner,buf,nr);
char *line;
while((line=line_reader_get_line(liner,true))!=NULL){
if(!writeall(sock,line,strlen(line))){
fprintf(stderr,"Socket write error\n");
goto cleanup;
}
// printf("Written <%s>\n",line);
free(line);
}
}
if(FD_ISSET(sock,&inset)){
u8 buf[1024];
i64 nr=read(sock,buf,sizeof buf);
if(nr<0){
if(errno==EINTR)continue;
perror("read");
break;
}
if(nr==0){
fprintf(stderr,"End-of-file on socket\n");
break;
}
fprintf(stderr,"unzbuffer_write(nr=%" PRIi64 ")\n",nr);
if(!unzbuffer_write(z,buf,nr)){
haderror=true;
break;
}
}
}
cleanup:
line_reader_destroy(liner);
if(!unzbuffer_finish_destroy(z))return 1;
if(haderror)return 1;
return 0;
}
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