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author | B. Watson <yalhcru@gmail.com> | 2019-03-13 02:50:42 -0400 |
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committer | B. Watson <yalhcru@gmail.com> | 2019-03-13 02:50:42 -0400 |
commit | 2973d0c78e9b8eed3c5af239927c6bd36af64604 (patch) | |
tree | a0fdfe7201303edd11c6d86015ef4f79796fcf0f /uip/apps/hello-world | |
download | fujichat-2973d0c78e9b8eed3c5af239927c6bd36af64604.tar.gz |
initial commit
Diffstat (limited to 'uip/apps/hello-world')
-rw-r--r-- | uip/apps/hello-world/Makefile.hello-world | 1 | ||||
-rw-r--r-- | uip/apps/hello-world/hello-world.c | 100 | ||||
-rw-r--r-- | uip/apps/hello-world/hello-world.h | 52 |
3 files changed, 153 insertions, 0 deletions
diff --git a/uip/apps/hello-world/Makefile.hello-world b/uip/apps/hello-world/Makefile.hello-world new file mode 100644 index 0000000..e34aaf5 --- /dev/null +++ b/uip/apps/hello-world/Makefile.hello-world @@ -0,0 +1 @@ +APP_SOURCES += hello-world.c diff --git a/uip/apps/hello-world/hello-world.c b/uip/apps/hello-world/hello-world.c new file mode 100644 index 0000000..7d0697c --- /dev/null +++ b/uip/apps/hello-world/hello-world.c @@ -0,0 +1,100 @@ +/** + * \addtogroup helloworld + * @{ + */ + +/** + * \file + * An example of how to write uIP applications + * with protosockets. + * \author + * Adam Dunkels <adam@sics.se> + */ + +/* + * This is a short example of how to write uIP applications using + * protosockets. + */ + +/* + * We define the application state (struct hello_world_state) in the + * hello-world.h file, so we need to include it here. We also include + * uip.h (since this cannot be included in hello-world.h) and + * <string.h>, since we use the memcpy() function in the code. + */ +#include "hello-world.h" +#include "uip.h" +#include <string.h> + +/* + * Declaration of the protosocket function that handles the connection + * (defined at the end of the code). + */ +static int handle_connection(struct hello_world_state *s); +/*---------------------------------------------------------------------------*/ +/* + * The initialization function. We must explicitly call this function + * from the system initialization code, some time after uip_init() is + * called. + */ +void +hello_world_init(void) +{ + /* We start to listen for connections on TCP port 1000. */ + uip_listen(HTONS(1000)); +} +/*---------------------------------------------------------------------------*/ +/* + * In hello-world.h we have defined the UIP_APPCALL macro to + * hello_world_appcall so that this funcion is uIP's application + * function. This function is called whenever an uIP event occurs + * (e.g. when a new connection is established, new data arrives, sent + * data is acknowledged, data needs to be retransmitted, etc.). + */ +void +hello_world_appcall(void) +{ + /* + * The uip_conn structure has a field called "appstate" that holds + * the application state of the connection. We make a pointer to + * this to access it easier. + */ + struct hello_world_state *s = &(uip_conn->appstate); + + /* + * If a new connection was just established, we should initialize + * the protosocket in our applications' state structure. + */ + if(uip_connected()) { + PSOCK_INIT(&s->p, s->inputbuffer, sizeof(s->inputbuffer)); + } + + /* + * Finally, we run the protosocket function that actually handles + * the communication. We pass it a pointer to the application state + * of the current connection. + */ + handle_connection(s); +} +/*---------------------------------------------------------------------------*/ +/* + * This is the protosocket function that handles the communication. A + * protosocket function must always return an int, but must never + * explicitly return - all return statements are hidden in the PSOCK + * macros. + */ +static int +handle_connection(struct hello_world_state *s) +{ + PSOCK_BEGIN(&s->p); + + PSOCK_SEND_STR(&s->p, "Hello. What is your name?\n"); + PSOCK_READTO(&s->p, '\n'); + strncpy(s->name, s->inputbuffer, sizeof(s->name)); + PSOCK_SEND_STR(&s->p, "Hello "); + PSOCK_SEND_STR(&s->p, s->name); + PSOCK_CLOSE(&s->p); + + PSOCK_END(&s->p); +} +/*---------------------------------------------------------------------------*/ diff --git a/uip/apps/hello-world/hello-world.h b/uip/apps/hello-world/hello-world.h new file mode 100644 index 0000000..5ef333b --- /dev/null +++ b/uip/apps/hello-world/hello-world.h @@ -0,0 +1,52 @@ +/** + * \addtogroup apps + * @{ + */ + +/** + * \defgroup helloworld Hello, world + * @{ + * + * A small example showing how to write applications with + * \ref psock "protosockets". + */ + +/** + * \file + * Header file for an example of how to write uIP applications + * with protosockets. + * \author + * Adam Dunkels <adam@sics.se> + */ + +#ifndef __HELLO_WORLD_H__ +#define __HELLO_WORLD_H__ + +/* Since this file will be included by uip.h, we cannot include uip.h + here. But we might need to include uipopt.h if we need the u8_t and + u16_t datatypes. */ +#include "uipopt.h" + +#include "psock.h" + +/* Next, we define the uip_tcp_appstate_t datatype. This is the state + of our application, and the memory required for this state is + allocated together with each TCP connection. One application state + for each TCP connection. */ +typedef struct hello_world_state { + struct psock p; + char inputbuffer[10]; + char name[40]; +} uip_tcp_appstate_t; + +/* Finally we define the application function to be called by uIP. */ +void hello_world_appcall(void); +#ifndef UIP_APPCALL +#define UIP_APPCALL hello_world_appcall +#endif /* UIP_APPCALL */ + +void hello_world_init(void); + +#endif /* __HELLO_WORLD_H__ */ +/** @} */ +/** @} */ |