From 9fb0ced14058a258508a61f998059a0f9ab005de Mon Sep 17 00:00:00 2001
From: hackbard <hackbard>
Date: Mon, 17 May 2004 18:19:31 +0000
Subject: [PATCH] implemented some udp features (untested) VS:
 ----------------------------------------------------------------------

---
 src/network.c | 94 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/network.h | 14 ++++++--
 2 files changed, 106 insertions(+), 2 deletions(-)

diff --git a/src/network.c b/src/network.c
index 55fa2c6..b9c68aa 100644
--- a/src/network.c
+++ b/src/network.c
@@ -265,3 +265,97 @@ int network_receive(int fd,unsigned char *data,int datasize) {
 
   return count;
 }
+
+int network_udp_listen_init(t_net *net,int port) {
+
+  struct sockaddr_in addr;
+
+  if((net->l_udp_fd=socket(AF_INET,SOCK_DGRAM,0))==-1) {
+    perror("[network] socket call (udp-receive)");
+    return N_ERROR;
+  }
+
+  memset(&addr,0,sizeof(struct sockaddr));
+  addr.sin_family=AF_INET;
+  addr.sin_port=htons(net->l_udp_port);
+  addr.sin_addr.s_addr=INADDR_ANY;
+  if(bind(net->l_udp_fd,(struct sockaddr *)&addr,sizeof(struct sockaddr))==-1) {
+    perror("[network] bind call (udp)");
+    return N_ERROR;
+  }
+
+  printf("[network] listening on port %d (udp)\n",net->l_udp_port);
+
+  if((net->s_udp_fd=socket(AF_INET,SOCK_DGRAM,0))==-1) {
+    perror("[network] socket call (udp-send)");
+    return N_ERROR;
+  }
+
+  return N_SUCCESS;
+}
+
+int network_set_udp_ports(t_net *net,int port) {
+
+  net->l_udp_port=port;
+
+  return N_SUCCESS;
+}
+
+int network_udp_receive(t_net *net,int channel, unsigned char *data,int count) {
+
+  struct sockaddr_in addr;
+  socklen_t len;
+
+  if((count=recvfrom(net->l_udp_fd,data,count,0,
+                     (struct sockaddr *)&addr,&len))==-1) {
+    perror("[network] recvfrom call");
+    return N_ERROR;
+  }
+
+  if(strncmp(net->connection[channel].ip,inet_ntoa(addr.sin_addr),IP_DIGITS)) {
+    printf("[network] packet from unknown: %s\n",inet_ntoa(addr.sin_addr));
+    return N_UDP_WRONG_SENDER;
+  }
+
+  return N_SUCCESS;
+}
+
+int network_udp_send(t_net *net,int channel, unsigned char *data,int size) {
+
+  int count,left;
+  struct sockaddr_in addr;
+
+  count=0;
+  left=count;
+
+  memset(&addr,0,sizeof(struct sockaddr));
+  addr.sin_family=AF_INET;
+  addr.sin_port=htons(net->l_udp_port);
+  inet_aton(net->connection[channel].ip,&(addr.sin_addr));
+
+  while(left) {
+    if((count=sendto(net->s_udp_fd,data+size-left,left,0,
+                     (struct sockaddr *)&addr,sizeof(struct sockaddr)))==-1) {
+      perror("[network] sendto call");
+      return N_ERROR;
+    }
+    left-=count;
+  }
+
+  return N_SUCCESS;
+}
+
+int network_udp_shutdown(t_net *net) {
+  
+  if(close(net->l_udp_fd)==-1) {
+    perror("[network] close call (udp-receive)");
+    return N_ERROR;
+  }
+
+  if(close(net->s_udp_fd)==-1) {
+    perror("[network] close call (udp-send)");
+    return N_ERROR;
+  }
+
+  return N_SUCCESS;
+}
diff --git a/src/network.h b/src/network.h
index 25a9891..5253191 100644
--- a/src/network.h
+++ b/src/network.h
@@ -37,6 +37,8 @@
 #define N_E_ACCEPT -7
 #define N_E_MAXC -8
 
+#define N_UDP_WRONG_SENDER -9
+
 #define MAX_LISTEN_QUEUE 32
 
 /* net specific variables */
@@ -49,8 +51,11 @@ typedef struct s_connection {
 } t_connection;
 
 typedef struct s_net {
-  int l_fd; /* listen file descriptor */
-  in_port_t l_port;
+  int l_fd; /* fd for tcp conn */
+  int l_udp_fd; /* fd for udp data receive */
+  int s_udp_fd; /* fd for udp data send */
+  in_port_t l_port; /* tcp port */
+  int l_udp_port; /* udp listen port */
   unsigned short cap;
   /* limited connections by now -- replaced by list management later */
   int c_count;
@@ -72,5 +77,10 @@ int network_deselect(t_net *net,int channel);
 int network_manage_incoming(t_net *net);
 int network_send(int fd,unsigned char *data,int datasize);
 int network_receive(int fd,unsigned char *data,int datasize);
+int network_udp_listen_init(t_net *net,int port);
+int network_set_udp_ports(t_net *net,int port);
+int network_udp_receive(t_net *net,int channel, unsigned char *data,int count);
+int network_udp_send(t_net *net,int channel, unsigned char *data,int size);
+int network_udp_shutdown(t_net *net);
 
 #endif
-- 
2.20.1