[CRIU] Process Migration using Sockets - PATCH 2/2
Rodrigo Bruno
rbruno at gsd.inesc-id.pt
Wed Sep 23 18:11:38 PDT 2015
Hi,
here goes the second part of the patch.
Signed-off-by: Rodrigo Bruno <rbruno at gsd.inesc-id.pt>
diff --git a/Makefile.crtools b/Makefile.crtools
index 4a74fa8..80f704f 100644
--- a/Makefile.crtools
+++ b/Makefile.crtools
@@ -6,10 +6,6 @@ obj-y += crtools.o
obj-y += security.o
obj-y += image.o
obj-y += image-desc.o
obj-y += image-remote.o
-obj-y += image-proxy.o
-obj-y += image-cache.o
-obj-y += image-remote-pvt.o
obj-y += net.o
obj-y += tun.o
obj-y += proc_parse.o
diff --git a/crtools.c b/crtools.c
index 54fa8de..ea8b889 100644
--- a/crtools.c
+++ b/crtools.c
@@ -58,12 +57,11 @@ void init_opts(void)
INIT_LIST_HEAD(&opts.ext_mounts);
INIT_LIST_HEAD(&opts.inherit_fds);
INIT_LIST_HEAD(&opts.new_cgroup_roots);
+ INIT_LIST_HEAD(&opts.irmap_scan_paths);
opts.cpu_cap = CPU_CAP_DEFAULT;
opts.manage_cgroups = CG_MODE_DEFAULT;
opts.ps_socket = -1;
- opts.addr = PROXY_FWD_HOST;
- opts.ps_port = CACHE_PUT_PORT;
opts.ghost_limit = DEFAULT_GHOST_LIMIT;
}
@@ -253,9 +251,7 @@ int main(int argc, char *argv[], char *envp[])
{ "enable-external-masters", no_argument, 0, 1067 },
{ "freeze-cgroup", required_argument, 0, 1068 },
{ "ghost-limit", required_argument, 0, 1069 },
{ "remote", no_argument, 0, 1070 },
- { "image-cache", no_argument, 0, 1071 },
- { "image-proxy", required_argument, 0, 1072 },
+ { "irmap-scan-path", required_argument, 0, 1070 },
{ },
};
@@ -648,12 +642,6 @@ int main(int argc, char *argv[], char *envp[])
if (!strcmp(argv[optind], "page-server"))
return cr_page_server(opts.daemon_mode, -1) > 0 ? 0 : 1;
- if (!strcmp(argv[optind], "image-cache"))
- return image_cache(opts.ps_port);
-
- if (!strcmp(argv[optind], "image-proxy"))
- return image_proxy(opts.addr, opts.ps_port);
-
if (!strcmp(argv[optind], "service"))
return cr_service(opts.daemon_mode);
@@ -680,8 +668,6 @@ usage:
" criu page-server\n"
" criu service [<options>]\n"
" criu dedup\n"
-" criu image-cache [<options>]\n"
-" criu image-proxy [<options>]\n"
"\n"
"Commands:\n"
" dump checkpoint a process/tree identified by pid\n"
@@ -694,8 +680,6 @@ usage:
" dedup remove duplicates in memory dump\n"
" cpuinfo dump writes cpu information into image file\n"
" cpuinfo check validates cpu information read from image file\n"
-" image-cache launch image-cache, used for process live migration\n"
-" image-proxy launch image-proxy, used for process live migration\n"
);
if (usage_error) {
@@ -739,6 +723,8 @@ usage:
" -l|--" OPT_FILE_LOCKS " handle file locks, for safety, only used for container\n"
" -L|--libdir path to a plugin directory (by default " CR_PLUGIN_DEFAULT ")\n"
" --force-irmap force resolving names for inotify/fsnotify watches\n"
+" --irmap-scan-path FILE\n"
+" add a path the irmap hints to scan\n"
" -M|--ext-mount-map KEY:VALUE\n"
" add external mount mapping\n"
" -M|--ext-mount-map auto\n"
@@ -776,7 +762,7 @@ usage:
" when used on restore, as soon as page is restored, it\n"
" will be punched from the image.\n"
"\n"
-"Page/Service/image-cache/image-proxy server options:\n"
+"Page/Service server options:\n"
" --address ADDR address of server or service\n"
" --port PORT port of page server\n"
" -d|--daemon run in the background after creating socket\n"
diff --git a/image-cache.c b/image-cache.c
deleted file mode 100644
index 84ffbe4..0000000
--- a/image-cache.c
+++ /dev/null
@@ -1,56 +0,0 @@
-#include <unistd.h>
-
-#include "image-remote.h"
-#include "image-remote-pvt.h"
-#include "criu-log.h"
-#include <pthread.h>
-
-void* cache_remote_image(void* ptr)
-{
- remote_image* rimg = (remote_image*) ptr;
-
- if (!strncmp(rimg->path, DUMP_FINISH, sizeof (DUMP_FINISH)))
- {
- close(rimg->src_fd);
- return NULL;
- }
-
- prepare_put_rimg();
-
- recv_remote_image(rimg->src_fd, rimg->path, &rimg->buf_head, true);
-
- finalize_put_rimg(rimg);
-
- return NULL;
-}
-
-int image_cache(unsigned short cache_put_port)
-{
- pthread_t get_thr, put_thr;
- int put_fd, get_fd;
-
- pr_info("Put Port %d, Get Port %d\n", cache_put_port, CACHE_GET_PORT);
-
- put_fd = prepare_server_socket(cache_put_port);
- get_fd = prepare_server_socket(CACHE_GET_PORT);
-
- if (init_cache())
- return -1;
-
- if (pthread_create(
- &put_thr, NULL, accept_put_image_connections, (void*) &put_fd)) {
- pr_perror("Unable to create put thread");
- return -1;
- }
- if (pthread_create(
- &get_thr, NULL, accept_get_image_connections, (void*) &get_fd)) {
- pr_perror("Unable to create get thread");
- return -1;
- }
-
- join_workers();
-
- pthread_join(put_thr, NULL);
- pthread_join(get_thr, NULL);
- return 0;
-}
diff --git a/image-proxy.c b/image-proxy.c
deleted file mode 100644
index 132eb5a..0000000
--- a/image-proxy.c
+++ /dev/null
@@ -1,74 +0,0 @@
-#include <unistd.h>
-
-#include "image-remote.h"
-#include "image-remote-pvt.h"
-#include "criu-log.h"
-#include <pthread.h>
-
-static char* dst_host;
-static unsigned short dst_port;
-
-void* proxy_remote_image(void* ptr)
-{
- remote_image* rimg = (remote_image*) ptr;
- rimg->dst_fd = prepare_client_socket(dst_host, dst_port);
- if (rimg->dst_fd < 0) {
- pr_perror("Unable to open recover image socket");
- return NULL;
- }
-
- if (write_header(rimg->dst_fd, rimg->namespace, rimg->path) < 0) {
- pr_perror("Error writing header for %s:%s",
- rimg->path, rimg->namespace);
- return NULL;
- }
-
- prepare_put_rimg();
-
- if (!strncmp(rimg->path, DUMP_FINISH, sizeof(DUMP_FINISH))) {
- close(rimg->dst_fd);
- finalize_put_rimg(rimg);
- return NULL;
- }
- if (recv_remote_image(rimg->src_fd, rimg->path, &(rimg->buf_head), false) < 0) {
- return NULL;
- }
- finalize_put_rimg(rimg);
- send_remote_image(rimg->dst_fd, rimg->path, &(rimg->buf_head), true);
- return NULL;
-}
-
-int image_proxy(char* fwd_host, unsigned short fwd_port)
-{
- pthread_t get_thr, put_thr;
- int put_fd, get_fd;
-
- dst_host = fwd_host;
- dst_port = fwd_port;
-
- pr_info("Proxy Get Port %d, Put Port %d, Destination Host %s:%hu\n",
- PROXY_GET_PORT, PROXY_PUT_PORT, fwd_host, fwd_port);
-
- put_fd = prepare_server_socket(PROXY_PUT_PORT);
- get_fd = prepare_server_socket(PROXY_GET_PORT);
-
- if(init_proxy())
- return -1;
-
- if (pthread_create(
- &put_thr, NULL, accept_put_image_connections, (void*) &put_fd)) {
- pr_perror("Unable to create put thread");
- return -1;
- }
- if (pthread_create(
- &get_thr, NULL, accept_get_image_connections, (void*) &get_fd)) {
- pr_perror("Unable to create get thread");
- return -1;
- }
-
- join_workers();
-
- pthread_join(put_thr, NULL);
- pthread_join(get_thr, NULL);
- return 0;
-}
diff --git a/image-remote-pvt.c b/image-remote-pvt.c
deleted file mode 100644
index bb213db..0000000
--- a/image-remote-pvt.c
+++ /dev/null
@@ -1,487 +0,0 @@
-#include <unistd.h>
-#include <stdlib.h>
-
-#include <semaphore.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#include <pthread.h>
-
-#include "image-remote-pvt.h"
-#include "criu-log.h"
-
-typedef struct wthread {
- pthread_t tid;
- struct list_head l;
-} worker_thread;
-
-static LIST_HEAD(rimg_head);
-static pthread_mutex_t rimg_lock;
-static sem_t rimg_semph;
-
-static LIST_HEAD(workers_head);
-static pthread_mutex_t workers_lock;
-static sem_t workers_semph;
-
-static int finished = 0;
-static int putting = 0;
-
-static void* (*get_func)(void*);
-static void* (*put_func)(void*);
-
-static remote_image* get_rimg_by_name(const char* namespace, const char* path)
-{
- remote_image* rimg = NULL;
- pthread_mutex_lock(&rimg_lock);
- list_for_each_entry(rimg, &rimg_head, l) {
- if( !strncmp(rimg->path, path, PATHLEN) &&
- !strncmp(rimg->namespace, namespace, PATHLEN)) {
- pthread_mutex_unlock(&rimg_lock);
- return rimg;
- }
- }
- pthread_mutex_unlock(&rimg_lock);
- return NULL;
-}
-
-static uint64_t sizeof_remote_buffer(struct list_head* rbuff_head)
-{
- uint64_t res = 0;
- remote_buffer* aux = NULL;
- list_for_each_entry(aux, rbuff_head, l) {
- res += aux->nbytes;
- }
- return res;
-}
-
-int init_sync_structures()
-{
- if (pthread_mutex_init(&rimg_lock, NULL) != 0) {
- pr_perror("Remote image connection mutex init failed");
- return -1;
- }
-
- if (sem_init(&rimg_semph, 0, 0) != 0) {
- pr_perror("Remote image connection semaphore init failed");
- return -1;
- }
-
- if (pthread_mutex_init(&workers_lock, NULL) != 0) {
- pr_perror("Workers mutex init failed");
- return -1;
- }
-
- if (sem_init(&workers_semph, 0, 0) != 0) {
- pr_perror("Workers semaphore init failed");
- return -1;
- }
- return 0;
-}
-
-void* get_remote_image(void* ptr)
-{
- remote_image* rimg = (remote_image*) ptr;
- send_remote_image(rimg->dst_fd, rimg->path, &rimg->buf_head, false);
- return NULL;
-}
-
-void prepare_put_rimg()
-{
- pthread_mutex_lock(&rimg_lock);
- putting++;
- pthread_mutex_unlock(&rimg_lock);
-}
-
-void finalize_put_rimg(remote_image* rimg)
-{
- pthread_mutex_lock(&rimg_lock);
- list_add_tail(&(rimg->l), &rimg_head);
- putting--;
- pthread_mutex_unlock(&rimg_lock);
- sem_post(&rimg_semph);
-}
-
-int init_proxy()
-{
- get_func = get_remote_image;
- put_func = proxy_remote_image;
- return init_sync_structures();
-}
-
-int init_cache()
-{
- get_func = get_remote_image;
- put_func = cache_remote_image;
- return init_sync_structures();
-}
-
-int prepare_server_socket(int port)
-{
- struct sockaddr_in serv_addr;
- int sockopt = 1;
-
- int sockfd = socket(AF_INET, SOCK_STREAM, 0);
- if (sockfd < 0) {
- pr_perror("Unable to open image socket");
- return -1;
- }
-
- bzero((char *) &serv_addr, sizeof (serv_addr));
- serv_addr.sin_family = AF_INET;
- serv_addr.sin_addr.s_addr = INADDR_ANY;
- serv_addr.sin_port = htons(port);
-
- if (setsockopt(
- sockfd, SOL_SOCKET, SO_REUSEADDR, &sockopt, sizeof (sockopt)) == -1) {
- pr_perror("Unable to set SO_REUSEADDR");
- return -1;
- }
-
- if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof (serv_addr)) < 0) {
- pr_perror("Unable to bind image socket");
- return -1;
- }
-
- if (listen(sockfd, DEFAULT_LISTEN)) {
- pr_perror("Unable to listen image socket");
- return -1;
- }
-
- return sockfd;
-}
-
-int prepare_client_socket(char* hostname, int port)
-{
- struct hostent *server;
- struct sockaddr_in serv_addr;
-
- int sockfd = socket(AF_INET, SOCK_STREAM, 0);
- if (sockfd < 0) {
- pr_perror("Unable to open recover image socket");
- return -1;
- }
-
- server = gethostbyname(hostname);
- if (server == NULL) {
- pr_perror("Unable to get host by name (%s)", hostname);
- return -1;
- }
-
- bzero((char *) &serv_addr, sizeof (serv_addr));
- serv_addr.sin_family = AF_INET;
- bcopy((char *) server->h_addr,
- (char *) &serv_addr.sin_addr.s_addr,
- server->h_length);
- serv_addr.sin_port = htons(port);
-
- if (connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
- pr_perror("Unable to connect to remote restore host %s", hostname);
- return -1;
- }
-
- return sockfd;
-}
-
-static void add_worker(pthread_t tid)
-{
- worker_thread* wthread = malloc(sizeof(worker_thread));
- if(!wthread) {
- pr_perror("Unable to allocate worker thread structure");
- }
- wthread->tid = tid;
- pthread_mutex_lock(&workers_lock);
- list_add_tail(&(wthread->l), &workers_head);
- pthread_mutex_unlock(&workers_lock);
- sem_post(&workers_semph);
-}
-
-void join_workers()
-{
- worker_thread* wthread = NULL;
- while (1) {
- if (list_empty(&workers_head)) {
- sem_wait(&workers_semph);
- continue;
- }
- wthread = list_entry(workers_head.next, worker_thread, l);
- if (pthread_join(wthread->tid, NULL)) {
- pr_perror("Could not join thread %lu", (unsigned long) wthread->tid);
- }
- else {
- list_del(&(wthread->l));
- free(wthread);
- }
-
- }
-}
-
-static remote_image* wait_for_image(int cli_fd, char* namespace, char* path)
-{
- remote_image *result;
-
- while (1) {
- result = get_rimg_by_name(namespace, path);
-
- if (result != NULL) {
- if (write_header(cli_fd, namespace, path) < 0) {
- pr_perror("Error writing header for %s:%s",
- path, namespace);
- close(cli_fd);
- return NULL;
- }
- return result;
- }
- /* The file does not exist and we do not expect new files */
- if (finished && !putting) {
- if (write_header(cli_fd, NULL_NAMESPACE, DUMP_FINISH) < 0) {
- pr_perror("Error writing header for %s:%s",
- DUMP_FINISH, NULL_NAMESPACE);
- }
- close(cli_fd);
- return NULL;
- }
- /* The file does not exist but the request is for a parent file.
- A parent file may not exist for the first process. */
- if (!putting && !strncmp(path, PARENT_IMG, PATHLEN)) {
- if (write_header(cli_fd, namespace, path) < 0) {
- pr_perror("Error writing header for %s:%s",
- path, namespace);
- }
- close(cli_fd);
- return NULL;
- }
- sem_wait(&rimg_semph);
- }
-}
-
-void* accept_get_image_connections(void* port)
-{
- socklen_t clilen;
- int cli_fd;
- pthread_t tid;
- int get_fd = *((int*) port);
- struct sockaddr_in cli_addr;
- clilen = sizeof (cli_addr);
- char path_buf[PATHLEN];
- char namespace_buf[PATHLEN];
- remote_image* rimg;
-
- while (1) {
-
- cli_fd = accept(get_fd, (struct sockaddr *) &cli_addr, &clilen);
- if (cli_fd < 0) {
- pr_perror("Unable to accept get image connection");
- return NULL;
- }
-
- if (read_header(cli_fd, namespace_buf, path_buf) < 0) {
- pr_perror("Error reading header");
- continue;
- }
-
- pr_info("Received GET for %s:%s.\n", path_buf, namespace_buf);
-
- rimg = wait_for_image(cli_fd, namespace_buf, path_buf);
- if (!rimg) {
- continue;
- }
-
- rimg->dst_fd = cli_fd;
-
- if (pthread_create(
- &tid, NULL, get_func, (void*) rimg)) {
- pr_perror("Unable to create put thread");
- return NULL;
- }
-
- pr_info("Serving Get request for %s:%s (tid=%lu)\n",
- rimg->path, rimg->namespace, (unsigned long) tid);
-
- add_worker(tid);
- }
-}
-
-void* accept_put_image_connections(void* port)
-{
- socklen_t clilen;
- int cli_fd;
- pthread_t tid;
- int put_fd = *((int*) port);
- struct sockaddr_in cli_addr;
- clilen = sizeof(cli_addr);
- char path_buf[PATHLEN];
- char namespace_buf[PATHLEN];
-
- while (1) {
-
- cli_fd = accept(put_fd, (struct sockaddr *) &cli_addr, &clilen);
- if (cli_fd < 0) {
- pr_perror("Unable to accept put image connection");
- return NULL;
- }
-
- if (read_header(cli_fd, namespace_buf, path_buf) < 0) {
- pr_perror("Error reading header");
- continue;
- }
-
- remote_image* rimg = get_rimg_by_name(namespace_buf, path_buf);
-
- pr_info("Reveiced PUT request for %s:%s\n", path_buf, namespace_buf);
-
- if (rimg == NULL) {
- rimg = malloc(sizeof (remote_image));
- if (rimg == NULL) {
- pr_perror("Unable to allocate remote_image structures");
- return NULL;
- }
-
- remote_buffer* buf = malloc(sizeof (remote_buffer));
- if (buf == NULL) {
- pr_perror("Unable to allocate remote_buffer structures");
- return NULL;
- }
-
- strncpy(rimg->path, path_buf, PATHLEN);
- strncpy(rimg->namespace, namespace_buf, PATHLEN);
- buf->nbytes = 0;
- INIT_LIST_HEAD(&(rimg->buf_head));
- list_add_tail(&(buf->l), &(rimg->buf_head));
- }
- /* NOTE: we implement a PUT by clearing the previous file. */
- else {
- pr_info("Clearing previous images for %s:%s\n",
- path_buf, namespace_buf);
- pthread_mutex_lock(&rimg_lock);
- list_del(&(rimg->l));
- pthread_mutex_unlock(&rimg_lock);
- while (!list_is_singular(&(rimg->buf_head))) {
- list_del(rimg->buf_head.prev);
- }
- list_entry(rimg->buf_head.next, remote_buffer, l)->nbytes = 0;
- }
- rimg->src_fd = cli_fd;
- rimg->dst_fd = -1;
-
- if (pthread_create(
- &tid, NULL, put_func, (void*) rimg)) {
- pr_perror("Unable to create put thread");
- return NULL;
- }
-
- pr_info("Serving PUT request for %s:%s (tid=%lu)\n",
- rimg->path, rimg->namespace, (unsigned long) tid);
-
- add_worker(tid);
-
- if (!strncmp(path_buf, DUMP_FINISH, sizeof (DUMP_FINISH))) {
- finished = 1;
- pr_info("Received DUMP FINISH\n");
- sem_post(&rimg_semph);
- }
- }
-}
-
-int recv_remote_image(int fd, char* path, struct list_head* rbuff_head, bool image_check)
-{
- remote_buffer* curr_buf = list_entry(rbuff_head->next, remote_buffer, l);
- int n, nblocks = 0;
- uint64_t image_bytes = 0;
- uint64_t recv_bytes = 0;
-
- if (image_check && (read(fd, &image_bytes, sizeof(uint64_t)) != sizeof(uint64_t))) {
- pr_perror("Unable to read size of the image %s", path);
- close(fd);
- return -1;
- }
-
- while(1) {
- n = read(fd,
- curr_buf->buffer + curr_buf->nbytes,
- BUF_SIZE - curr_buf->nbytes);
- if (n == 0 && image_check && image_bytes != recv_bytes) {
- pr_info("Failed receiving %s (received %lu instead of %lu)\n",
- path, recv_bytes, image_bytes);
- close(fd);
- return -1;
- }
- else if (n == 0) {
- pr_info("Finished receiving %s (%d full blocks, %d bytes on last block)\n",
- path, nblocks, curr_buf->nbytes);
- close(fd);
- return recv_bytes;
- }
- else if (n > 0) {
- curr_buf->nbytes += n;
- recv_bytes = nblocks*BUF_SIZE + curr_buf->nbytes;
- if(curr_buf->nbytes == BUF_SIZE) {
- remote_buffer* buf = malloc(sizeof(remote_buffer));
- if (buf == NULL) {
- pr_perror("Unable to allocate remote_buffer structures");
- close(fd);
- return -1;
- }
- buf->nbytes = 0;
- list_add_tail(&(buf->l), rbuff_head);
- curr_buf = buf;
- nblocks++;
- }
- }
- else {
- pr_perror("Read on %s socket failed", path);
- close(fd);
- return -1;
- }
- }
-}
-
-int send_remote_image(int fd, char* path, struct list_head* rbuff_head, bool image_check)
-{
- remote_buffer* curr_buf = list_entry(rbuff_head->next, remote_buffer, l);
- int n, curr_offset, nblocks;
-
- nblocks = 0;
- curr_offset = 0;
-
- if (image_check) {
- uint64_t image_bytes = sizeof_remote_buffer(rbuff_head);
- n = send(fd, &image_bytes, sizeof(uint64_t), MSG_NOSIGNAL);
- if (n < sizeof(uint64_t)) {
- pr_perror("Unable to send size of the image %s", path);
- close(fd);
- return -1;
- }
- }
-
- while(1) {
- n = send(
- fd,
- curr_buf->buffer + curr_offset,
- MIN(BUF_SIZE, curr_buf->nbytes) - curr_offset,
- MSG_NOSIGNAL);
- if (n > -1) {
- curr_offset += n;
- if (curr_offset == BUF_SIZE) {
- curr_buf =
- list_entry(curr_buf->l.next, remote_buffer, l);
- nblocks++;
- curr_offset = 0;
- }
- else if (curr_offset == curr_buf->nbytes) {
- pr_info("Finished forwarding %s (%d full blocks, %d bytes on last block)\n",
- path, nblocks, curr_offset);
- close(fd);
- return nblocks*BUF_SIZE + curr_buf->nbytes;
- }
- }
- else if (errno == EPIPE || errno == ECONNRESET) {
- pr_warn("Connection for %s was closed early than expected\n",
- path);
- return 0;
- }
- else {
- pr_perror("Write on %s socket failed", path);
- }
-}
diff --git a/include/image-remote-pvt.h b/include/image-remote-pvt.h
deleted file mode 100644
index 69e06e1..0000000
--- a/include/image-remote-pvt.h
+++ /dev/null
@@ -1,53 +0,0 @@
-#ifndef IMAGE_REMOTE_PVT_H
-#define IMAGE_REMOTE_PVT_H
-
-#include <stdbool.h>
-#include "list.h"
-#include "image-remote.h"
-
-#define DEFAULT_LISTEN 50
-#define PAGESIZE 4096
-#define BUF_SIZE PAGESIZE
-
-/*
- * This header is used by both the image-proxy and the image-cache.
- */
-
-typedef struct rbuf {
- char buffer[BUF_SIZE];
- int nbytes; /* How many bytes are in the buffer. */
- struct list_head l;
-} remote_buffer;
-
-typedef struct rimg {
- char path[PATHLEN];
- char namespace[PATHLEN];
- int src_fd;
- int dst_fd;
- struct list_head l;
- struct list_head buf_head;
-
-} remote_image;
-
-int init_cache();
-int init_proxy();
-
-void join_workers();
-
-void prepare_put_rimg();
-void finalize_put_rimg(remote_image* rimg);
-
-void* accept_get_image_connections(void* port);
-void* accept_put_image_connections(void* port);
-
-void* cache_remote_image(void* rimg);
-void* proxy_remote_image(void* rimg);
-
-int send_remote_image(int fd, char* path, struct list_head* rbuff_head, bool image_check);
-int recv_remote_image(int fd, char* path, struct list_head* rbuff_head, bool image_check);
-
-int prepare_server_socket(int port);
-int prepare_client_socket(char* server, int port);
-
-#endif /* IMAGE_REMOTE_INTERNAL_H */
-
--
Rodrigo Bruno <rbruno at gsd.inesc-id.pt>
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